#include "schema_creator.h"

#include<set>
#include <utility>

namespace domain {


    ComdelContext::ComdelContext(std::string name, bool inComponent, bool inConnection, bool inSingleAutomaticConnection, bool inBus)
        : name(std::move(name)), inComponent(inComponent), inConnection(inConnection), inSingleAutomaticConnection(inSingleAutomaticConnection), inBus(inBus) {}

    bool ComdelContext::doesAttributeExists(std::string name, Value::ValueType type) {
        for (auto &attribute: attributes) {
            if (attribute.getDefault().getType() == type && attribute.getName() == name) {
                return true;
            }
        }
        return false;
    }

    bool ComdelContext::doesWireExists(std::string name) {
        for (auto &w: wires) {
            if (w == name) {
                return true;
            }
        }
        return false;
    }


    Component::ComponentType toType(ComponentNode::ComponentType type) {
        if (type == ComponentNode::MEMORY) {
            return Component::MEMORY;
        } else if (type == ComponentNode::PROCESSOR) {
            return Component::PROCESSOR;
        }
        return Component::OTHER;
    }

    Action::ActionType toType(ActionNode::ActionType type) {
        if (type == ActionNode::ERROR) {
            return Action::ERROR;
        }
        return Action::WARNING;
    }

    Wire::WireType toType(WireNode::WireType type) {
        switch (type) {
            case WireNode::R_WIRE:
                return Wire::R_WIRE;
            case WireNode::WIRE:
                return Wire::WIRE_DEFAULT;
            case WireNode::WIRED_AND:
                return Wire::WIRED_AND;
            case WireNode::WIRED_OR:
                return Wire::WIRED_OR;
            default:
                return Wire::WIRE_DEFAULT;
        }
    }

    Value::ValueType toType(ValueNode::ValueType type) {
        switch (type) {
            case ValueNode::BOOL:
                return Value::BOOL;
            case ValueNode::MEMORY:
                return Value::MEMORY_REFERENCE;
            case ValueNode::WIRE:
                return Value::WIRE_REFERENCE;
            case ValueNode::STRING:
                return Value::STRING;
            case ValueNode::INT:
                return Value::INT;
            case ValueNode::NIL:
                return Value::NIL;
            default:
                return Value::UNDEFINED;
        }
    }


    Value toType(ValueNode node, Value::ValueType type = Value::ValueType::UNDEFINED) {
        if (type == Value::MEMORY_REFERENCE) {
            if (node.is(ValueNode::NIL)) {
                return Value::fromMemoryReference(nullopt);
            } else {
                return Value::fromMemoryReference(node.asIdentifier());
            }
        }

        if (node.is(ValueNode::BOOL)) {
            return Value::fromBool(node.asBool());
        } else if (node.is(ValueNode::INT)) {
            return Value::fromInt(node.asInt());
        } else if (node.is(ValueNode::STRING)) {
            return Value::fromString(node.asString());
        } else if (node.is(ValueNode::NIL)) {
            return Value::fromNull();
        }
        return Value::fromReference(node.asIdentifier(), Value::UNDEFINED);
    }


    Bus::BusType toType(BusNode::BusType type) {
        if (type == BusNode::AUTOMATIC) {
            return Bus::AUTOMATIC;
        } else if (type == BusNode::SINGLE_AUTOMATIC) {
            return Bus::SINGLE_AUTOMATIC;
        }
        return Bus::REGULAR;
    }


    Pin::PinType toType(PinNode::PinType type) {
        if (type == PinNode::IN) {
            return Pin::IN;
        } else if (type == PinNode::OUT) {
            return Pin::OUT;
        }
        return Pin::IN_OUT;
    }

    Popup::PopupType toType(PopupNode::PopupType type) {
        if (type == PopupNode::AUTOMATIC) {
            return Popup::AUTOMATIC;
        }
        return Popup::ON_DEMAND;
    }

    SchemaCreator::SchemaCreator(std::vector<FunctionValidator *> validators)
            : validators(std::move(validators)) {}

    std::optional<Library> SchemaCreator::loadLibrary(LibraryNode node) {
        // library fields
        if (!node.name) {
            errors.emplace_back(node.span, "missing @name");
            return nullopt;
        } else {
            name = node.name->asString();
        }

        if (node.componentHeader.has_value()) {
            componentHeader = node.componentHeader->asString();
        }

        if (!node.componentDirectory) {
            errors.emplace_back(node.span, "missing @componentDirectory");
            return nullopt;
        } else {
            componentDirectory = node.componentDirectory->asString();
        }

        header = node.header ? node.header->asString() : "";

        libraryInfo = node.libraryInfo ? node.libraryInfo->asString() : "";

        for (auto &as: node.addressSpaces) {
            addressSpaces.push_back(*loadAddressSpace(as));
        }

        for (auto &comp: node.components) {
            auto component = loadComponent(comp);
            if (component) {
                components.push_back(*component);
            }
        }

        for (auto &buse: node.buses) {
            auto bus = loadBus(buse);
            if (bus) {
                buses.push_back(*bus);
            }
        }

        for (auto &connection: node.connections) {
            auto conn = loadConnection(connection);
            if (conn) {
                connections.push_back(*conn);
            }
        }

        for (auto &message: node.messages) {
            if (!message.value.is(ValueNode::STRING)) {
                errors.emplace_back(message.value.span, "expected `string`");
            } else {
                messages[message.key.value] = message.value.asString();
            }
        }

        if(errors.empty()) {
            return Library(name, libraryInfo, header, componentDirectory, componentHeader, addressSpaces, components, buses,
                           connections, messages);
        } else {
            return nullopt;
        }

    }

    std::optional<Bus> SchemaCreator::loadBus(BusNode node) {
        std::string busName = node.name.value;

        if (!node.instanceName) {
            errors.emplace_back(node.span, "missing @instanceName");
            return nullopt;
        }
        std::string instanceName = node.instanceName->value;

        auto count = std::make_pair<int, int>(1, 1);
        if (node.count) {
            count = std::make_pair<int, int>(node.count->first.value, node.count->second.value);
        }
        if (count.first > count.second || count.first < 0) {
            errors.emplace_back(node.count->span, "invalid @size");
            return nullopt;
        }

        auto type = toType(node.type.value);

        if (!node.tooltip && type == Bus::REGULAR) {
            errors.emplace_back(node.span, "missing @tooltip");
            return nullopt;
        }
        std::string tooltip = node.tooltip->asString();

        if (!node.display && type == Bus::REGULAR) {
            errors.emplace_back(node.span, "missing @display");
            return nullopt;
        }
        if (node.display && (type == Bus::AUTOMATIC || type == Bus::SINGLE_AUTOMATIC)) {
            errors.emplace_back(node.span, "automatic bus cannot have a @display");
            return nullopt;
        }

        optional<ui::Bus> displayBus;
        if (type == Bus::REGULAR) {
            auto display = loadDisplay(*node.display);
            if (!display) {
                return nullopt;
            }
            if (display->getItems().size() != 1 || !display->getItems()[0].bus.has_value()) {
                errors.emplace_back(node.span, "@display must contain only exactly one bus definition");
                return nullopt;
            }
            displayBus = *display->getItems()[0].bus;
        }

        if (node.wires.empty()) {
            errors.emplace_back(node.span, "missing @wires");
            return nullopt;
        }
        std::vector<Wire> wires;
        for (auto &_wire: node.wires) {
            auto wire = loadWire(_wire);
            if (wire) {
                wires.push_back(*wire);
            }
        }

        if (type == Bus::SINGLE_AUTOMATIC && wires.size() != 1) {
            errors.emplace_back(node.span, "singleAutomatic bus must have exactly 1 wire defined");
            return nullopt;
        }

        return Bus(busName, instanceName, tooltip, type, count, wires, displayBus);
    }


    std::optional<AddressSpace> SchemaCreator::loadAddressSpace(AddressSpaceNode node) {
        return AddressSpace(node.name.value, node.range.first.value, node.range.second.value);
    }

    std::optional<Connection> SchemaCreator::loadConnection(ConnectionNode node) {
        push(ComdelContext("connection", false, true, false, false));

        std::string bus = node.bus.value;
        auto busInstance = getBus(bus);
        if (!busInstance) {
            errors.emplace_back(node.span, "bus does not exist");
        }

        if (busInstance->getType() == Bus::SINGLE_AUTOMATIC) {
            current().inSingleAutomaticConnection = true;
        }

        if (busInstance->getType() == Bus::REGULAR) {
            ConnectionComponent first{node.first.component.value, node.first.pin.value};

            auto componentInstance = getComponentPin(first.component, first.pin);
            if (!componentInstance) {
                errors.emplace_back(node.span, "pin does not exist");
            }

            if (node.second.has_value()) {
                errors.emplace_back(node.span, "regular bus doesn't allow direct connections");
            }

            std::set<std::string> wireNames;
            for (auto &wire: busInstance->getWires()) {
                wireNames.insert(wire.getName());
                current().wires.push_back(wire.getName());
            }

            std::vector<Attribute> attributes;
            for (auto &attribute: node.attributes) {
                auto attr = loadAttribute(attribute);
                if (!attr) {
                    return nullopt;
                }
                attributes.push_back(*attr);
            }

            std::set<std::string> attributeNames;
            for (auto attribute: attributes) {
                attributeNames.insert(attribute.getName());
            }

            std::vector<Value> wires;
            for (auto &firstWire: node.firstWires) {
                if (firstWire.is(ValueNode::NIL)) {
                    wires.push_back(Value::fromNull());
                } else if (firstWire.is(ValueNode::INT)) {
                    wires.push_back(Value::fromInt(firstWire.asInt()));
                } else if (firstWire.is(ValueNode::IDENTIFIER)) {
                    if (attributeNames.count(firstWire.asIdentifier())) {
                        wires.push_back(Value::fromReference(firstWire.asIdentifier(), Value::ATTRIBUTE_REFERENCE));
                    } else if (wireNames.count(firstWire.asIdentifier())) {
                        wires.push_back(Value::fromReference(firstWire.asIdentifier(), Value::WIRE_REFERENCE));
                    } else {
                        errors.emplace_back(firstWire.span, "unknown identifier");
                    }
                } else {
                    errors.emplace_back(firstWire.span, "unknown value type");
                }
            }

            pop();

            return Connection(first, nullopt, bus, attributes, wires, nullopt);
        } else if (busInstance->getType() == Bus::AUTOMATIC || busInstance->getType() == Bus::SINGLE_AUTOMATIC) {
            ConnectionComponent first{node.first.component.value, node.first.pin.value};

            if (!node.second.has_value()) {
                errors.emplace_back(node.span, "missing second component");
            }

            ConnectionComponent second{node.second->component.value, node.second->pin.value};

            auto firstComponentInstance = getComponentPin(first.component, first.pin);
            if (!firstComponentInstance) {
                errors.emplace_back(node.span, "pin does not exist");
            }

            auto secondComponentInstance = getComponentPin(second.component, second.pin);
            if (!secondComponentInstance) {
                errors.emplace_back(node.span, "pin does not exist");
            }

            std::set<std::string> wireNames;
            for (auto &wire: busInstance->getWires()) {
                wireNames.insert(wire.getName());
                current().wires.push_back(wire.getName());
            }

            if (node.attributes.size() != 2 && busInstance->getType() == Bus::SINGLE_AUTOMATIC) {
                errors.emplace_back(node.span, "singleAutomatic must contain 2 attributes");
            }

            std::vector<Attribute> attributes;
            for (auto &attribute: node.attributes) {
                auto attr = loadAttribute(attribute);
                if (!attr) {
                    return nullopt;
                }
                attributes.push_back(*attr);
            }

            std::set<std::string> attributeNames;
            for (auto attribute: attributes) {
                attributeNames.insert(attribute.getName());
            }

            std::vector<Value> firstWires;
            for (auto &firstWire: node.firstWires) {
                if (firstWire.is(ValueNode::NIL)) {
                    firstWires.push_back(Value::fromNull());
                } else if (firstWire.is(ValueNode::INT)) {
                    firstWires.push_back(Value::fromInt(firstWire.asInt()));
                } else if (firstWire.is(ValueNode::STRING) && busInstance->getType() == Bus::SINGLE_AUTOMATIC) {
                    firstWires.push_back(Value::fromString(firstWire.asString()));
                } else if (firstWire.is(ValueNode::IDENTIFIER) && busInstance->getType() == Bus::AUTOMATIC) {
                    if (attributeNames.count(firstWire.asIdentifier())) {
                        firstWires.push_back(
                                Value::fromReference(firstWire.asIdentifier(), Value::ATTRIBUTE_REFERENCE));
                    } else if (wireNames.count(firstWire.asIdentifier())) {
                        firstWires.push_back(Value::fromReference(firstWire.asIdentifier(), Value::WIRE_REFERENCE));
                    } else {
                        errors.emplace_back(firstWire.span, "unknown identifier");
                    }
                } else {
                    errors.emplace_back(firstWire.span, "unsupported value type");
                }
            }


            std::vector<Value> secondWires;
            for (auto &secondWire: *node.secondWires) {
                if (secondWire.is(ValueNode::NIL)) {
                    secondWires.push_back(Value::fromNull());
                } else if (secondWire.is(ValueNode::INT)) {
                    secondWires.push_back(Value::fromInt(secondWire.asInt()));
                } else if (secondWire.is(ValueNode::STRING) && busInstance->getType() == Bus::SINGLE_AUTOMATIC) {
                    secondWires.push_back(Value::fromString(secondWire.asString()));
                } else if (secondWire.is(ValueNode::IDENTIFIER) && busInstance->getType() == Bus::AUTOMATIC) {
                    if (attributeNames.count(secondWire.asIdentifier())) {
                        secondWires.push_back(
                                Value::fromReference(secondWire.asIdentifier(), Value::ATTRIBUTE_REFERENCE));
                    } else if (wireNames.count(secondWire.asIdentifier())) {
                        secondWires.push_back(Value::fromReference(secondWire.asIdentifier(), Value::WIRE_REFERENCE));
                    } else {
                        errors.emplace_back(secondWire.span, "unknown identifier");
                    }
                } else {
                    errors.emplace_back(secondWire.span, "unsupported value type");
                }
            }

            if (busInstance->getType() == Bus::SINGLE_AUTOMATIC && attributes.size() == 2) {
                if (!attributes[0].getPopup().has_value()) {
                    errors.emplace_back(node.attributes[0].span, "@popup is required");
                } else if (attributes[0].getDefault().getType() != Value::STRING) {
                    errors.emplace_back(node.attributes[0].span, "@attribute must be of type string");
                } else {
                    domain::Popup popup = *attributes[0].getPopup();
                    popup.setEnumeration(createWireEnumeration(firstWires));
                    attributes[0].setPupup(popup);
                }

                if (!attributes[1].getPopup().has_value()) {
                    errors.emplace_back(node.attributes[1].span, "@popup is required");
                } else if (attributes[1].getDefault().getType() != Value::STRING) {
                    errors.emplace_back(node.attributes[1].span, "@attribute must be of type string");
                } else {
                    domain::Popup popup = *attributes[1].getPopup();
                    popup.setEnumeration(createWireEnumeration(secondWires));
                    attributes[1].setPupup(popup);
                }
            }

            pop();

            return Connection(first, second, bus, attributes, firstWires, secondWires);
        }
        pop();
        errors.emplace_back(node.span, "unsupported connection type");

        return std::nullopt;
    }

    std::optional<Component> SchemaCreator::loadComponent(ComponentNode node) {
        push(ComdelContext(node.name.value, true, false, false, false));

        std::string componentName = node.name.value;

        if (!node.tooltip) {
            errors.emplace_back(node.span, "missing @tooltip");
            pop();
            return nullopt;
        }
        std::string tooltip = node.tooltip->asString();

        if (!node.source) {
            errors.emplace_back(node.span, "missing @source");
            pop();
            return nullopt;
        }
        std::string source = node.source->asString();

        Component::ComponentType type = toType(node.type.value);

        std::vector<Attribute> attributes;
        for (auto &a: node.attributes) {
            std::optional<Attribute> attribute = loadAttribute(a);
            if (attribute) {
                attributes.push_back(*attribute);
            }
        }
        if (type == Component::PROCESSOR) {
            attributes.push_back(*createMemoryAttribute());
        }

        context[context.size() - 1].attributes = attributes;

        std::vector<Rule> rules;
        for (auto &r: node.rules) {
            std::optional<Rule> rule = loadRule(r);
            if (rule) {
                rules.push_back(*rule);
            }
        }

        if (!node.instanceName) {
            errors.emplace_back(node.span, "missing @instanceName");
            pop();
            return nullopt;
        }
        std::string instanceName = node.instanceName->value;

        auto count = std::make_pair<int, int>(1, 1);
        if (node.count) {
            count = std::make_pair<int, int>(node.count->first.value, node.count->second.value);
        }
        if (count.first > count.second || count.first < 0) {
            errors.emplace_back(node.count->first.span, "invalid @size");
            pop();
            return nullopt;
        }

        if (!node.display) {
            errors.emplace_back(node.span, "missing @display");
            pop();
            return nullopt;
        }
        optional<Display> display = loadDisplay(*node.display);
        if (!display) {
            pop();
            return nullopt;
        }

        std::vector<Pin> pins;
        for (auto &p: node.pins) {
            auto pin = loadPin(p);
            if (!pin) {
                pop();
                return nullopt;
            }
            pins.push_back(*pin);
        }

        pop();
        return Component(componentName, tooltip, source, type, rules, instanceName, count, *display, pins, attributes);
    }

    std::optional<Wire> SchemaCreator::loadWire(WireNode node) {
        return Wire(
                node.name.value,
                toType(node.type.value),
                node.size.value,
                node.hidden,
                node.hasTerminateWith,
                toType(node.terminateWith)
        );
    }

    optional<Pin> SchemaCreator::loadPin(PinNode node) {
        std::string pinName = node.name.value;
        Pin::PinType type = toType(node.type.value);

        if (!node.tooltip) {
            errors.emplace_back(node.span, "missing @tooltip");
            return nullopt;
        }
        std::string tooltip = node.tooltip->asString();

        if (!node.display) {
            errors.emplace_back(node.span, "missing @display");
            return nullopt;
        }
        std::vector<Attribute> attributes;
        optional<Display> display = loadDisplay(*node.display);
        if (!display) {
            return nullopt;
        }
        if (display->getItems().size() != 1 || !display->getItems()[0].pin.has_value()) {
            errors.emplace_back(node.span, "@display must contain only exactly one pin definition");
            return nullopt;
        }
        ui::Pin displayPin = *display->getItems()[0].pin;

        std::optional<std::string> connection = std::nullopt;
        if (node.connection) {
            connection = node.connection->asString();
        }

        std::optional<std::vector<Value>> wiresOpt = std::nullopt;
        if (node.wires.has_value()) {
            auto nodeWires = node.wires.value();
            std::vector<Value> wires;
            for (auto &nodeWire: nodeWires) {
                if (nodeWire.is(ValueNode::NIL)) {
                    wires.push_back(Value::fromNull());
                } else if (nodeWire.is(ValueNode::INT)) {
                    wires.push_back(Value::fromInt(nodeWire.asInt()));
                } else {
                    errors.emplace_back(node.span, "unknown value type");
                }
            }
            wiresOpt = wires;
        }

        return Pin(pinName, type, tooltip, connection, displayPin, wiresOpt);
    }

    Color readColor(std::vector<SourceError>& errors, DisplayItemNode& item, std::string property, Color _default) {
        auto color = item.asColor(property, _default);
        if(!color.has_value()) {
            errors.emplace_back(item.span, "expected color");
            return _default;
        }
        return *color;
    }

    std::string readString(std::vector<SourceError>& errors, DisplayItemNode& item, std::string property, std::string _default = "") {
        auto value = item.asString(property, _default);
        if(!value.has_value()) {
            errors.emplace_back(item.span, "expected string");
            return _default;
        }
        return *value;
    }

    long long int readInt(std::vector<SourceError>& errors, DisplayItemNode& item, std::string property, long long int _default = 0) {
        auto value = item.asInt(property, _default);
        if(!value.has_value()) {
            errors.emplace_back(item.span, "expected int");
            return _default;
        }
        return *value;
    }

    std::optional<Display> SchemaCreator::loadDisplay(DisplayNode node) {
        std::vector<ui::Item> items;
        for (auto &item: node.items) {
            ui::Item displayItem;
            std::string type = item.type.value;

            auto fillColor = readColor(errors, item, "fillColor", Color(255, 255, 255, 255));
            auto lineColor = readColor(errors, item, "lineColor", Color(0, 0, 0, 255));

            if (type == "text") {
                long long int x, y, w, h;
                std::string text;
                auto color = readColor(errors, item, "color", Color(0, 0, 0, 255));
                x = readInt(errors, item, "x");
                y = readInt(errors, item, "y");
                w = readInt(errors, item, "w");
                h = readInt(errors, item, "h");
                text = readString(errors, item, "text");
                displayItem.text = ui::Text(x, y, w, h, text, color);
            } else if (type == "rect") {
                long long int x, y, w, h;
                x = readInt(errors, item, "x");
                y = readInt(errors, item, "y");
                w = readInt(errors, item, "w");
                h = readInt(errors, item, "h");
                displayItem.rect = ui::Rect(x, y, w, h, {lineColor, fillColor});
            } else if (type == "line") {
                long long int x1, y1, x2, y2;
                x1 = readInt(errors, item, "x1");
                y1 = readInt(errors, item, "y1");
                x2 = readInt(errors, item, "x2");
                y2 = readInt(errors, item, "y2");
                displayItem.line = ui::Line(x1, y1, x2, y2, {lineColor, fillColor});
            } else if (type == "pin") {
                long long int x, y, w, h;
                x = readInt(errors, item, "x");
                y = readInt(errors, item, "y");
                w = readInt(errors, item, "w");
                h = readInt(errors, item, "h");
                std::string _orientation = readString(errors, item, "orientation", "bottom");
                std::string _pinType = readString(errors, item, "type", "out");

                ui::PinOrientation orientation;
                if (_orientation == "left") {
                    orientation = ui::PinOrientation::LEFT;
                } else if (_orientation == "right") {
                    orientation = ui::PinOrientation::RIGHT;
                } else if (_orientation == "top") {
                    orientation = ui::PinOrientation::TOP;
                } else if (_orientation == "bottom") {
                    orientation = ui::PinOrientation::BOTTOM;
                } else {
                    errors.emplace_back(item.span, "unknown pin orientation type '" + _orientation + "'");
                }

                ui::PinType pinType;
                if (_pinType == "in") {
                    pinType = ui::PinType::IN;
                } else if (_pinType == "out") {
                    pinType = ui::PinType::OUT;
                } else if (_pinType == "in_out") {
                    pinType = ui::PinType::IN_OUT;
                } else {
                    errors.emplace_back(item.span, "unknown pin type '" + _pinType + "'");
                }

                displayItem.pin = ui::Pin(x, y, w, h, orientation, pinType, {lineColor, fillColor});
            } else if (type == "bus") {
                long long int x, y, w, h;
                x = readInt(errors, item, "x");
                y = readInt(errors, item, "y");
                w = readInt(errors, item, "w");
                h = readInt(errors, item, "h");
                std::string _orientation = readString(errors, item, "orientation", "bottom");

                ui::BusOrientation orientation;
                if (_orientation == "horizontal") {
                    orientation = ui::BusOrientation::HORIZONTAL;
                } else if (_orientation == "vertical") {
                    orientation = ui::BusOrientation::VERTICAL;
                } else {
                    errors.emplace_back(item.span, "unknown bus orientation type '" + _orientation + "'");
                }

                displayItem.bus = ui::Bus(x, y, w, h, orientation, {lineColor, fillColor});
            } else {
                errors.emplace_back(item.type.span, "unsupported display type");
            }
            items.push_back(displayItem);
        }
        return Display(items);
    }

    std::optional<Attribute> SchemaCreator::loadAttribute(AttributeNode node) {
        std::string name = node.name.value;
        pushAdditional(name);
        Value value;

        if (current().inComponent) {
            if (node.type == ValueNode::INT) {
                value = Value::fromInt(node.defaultValue->asInt());
            } else if (node.type == ValueNode::BOOL) {
                value = Value::fromBool(node.defaultValue->asBool());
            } else if (node.type == ValueNode::STRING) {
                value = Value::fromString(node.defaultValue->asString());
            } else {
                errors.emplace_back(node.name.span, "unsupported type");
            }
        }
        if (current().inConnection && !current().inSingleAutomaticConnection) { // TODO remove identifier
            if (node.type == ValueNode::WIRE || node.type == ValueNode::IDENTIFIER) {
                if (current().doesWireExists(node.defaultValue->asIdentifier())) {
                    value = Value::fromReference(node.defaultValue->asIdentifier(), Value::WIRE_REFERENCE);
                } else {
                    value = Value::fromReference("", Value::WIRE_REFERENCE);
                    errors.emplace_back(node.span, "unknown identifier");
                }
            } else {
                errors.emplace_back(node.name.span, "unsupported type");
            }
        }
        if (current().inSingleAutomaticConnection) {
            if (node.type == ValueNode::STRING) {
                value = Value::fromString(node.defaultValue->asString());
            } else {
                errors.emplace_back(node.name.span, "unsupported type");
            }
        }

        current().attributes.emplace_back(name, value);

        std::optional<Popup> popup;
        if (node.popup) {
            popup = loadPopup(*node.popup, name, toType(node.type));
        }

        pop();
        return Attribute(name, value, popup);
    }

    std::optional<Popup> SchemaCreator::loadPopup(PopupNode node, std::string name, Value::ValueType type) {
        auto popupType = toType(node.type.value().value);

        pushAdditional(name);

        current().attributes.clear();
        current().attributes.emplace_back(name, Value::ofType(type));

        if (!node.title) {
            errors.emplace_back(node.span, "missing @title");
            return nullopt;
        }
        std::string title = node.title->asString();

        if (!node.text) {
            errors.emplace_back(node.span, "missing @text");
            return nullopt;
        }
        std::string text = node.text->asString();

        std::vector<Rule> rules;
        for (auto &r: node.rules) {
            std::optional<Rule> rule = loadRule(r);
            if (rule) {
                rules.push_back(*rule);
            }
        }

        std::vector<Enumeration> enumeration;
        if (node.enumerated) {
            for (auto &enumNode: node.enumeration) {
                if (type == Value::INT || type == Value::STRING || type == Value::BOOL) {
                    auto value = toType(enumNode.value);
                    if (value.getType() == type) {
                        enumeration.emplace_back(enumNode.key.asString(), value);
                    } else {
                        errors.emplace_back(enumNode.span, "wrong type");
                    }
                } else if (type == Value::WIRE_REFERENCE) {
                    auto value = toType(enumNode.value);
                    if (value.isType(Value::UNDEFINED)) {
                        if (current().doesWireExists(value.asReference())) {
                            value = Value::fromReference(value.asReference(), Value::WIRE_REFERENCE);
                        } else {
                            errors.emplace_back(enumNode.span, "unknown wire");
                        }
                    }

                    if (value.isType(Value::WIRE_REFERENCE) || value.isType(Value::INT) || value.isType(Value::NIL)) {
                        enumeration.emplace_back(enumNode.key.asString(), value);
                    } else {
                        errors.emplace_back(enumNode.span, "wrong type");
                    }
                }
            }
        } else {
            if (type == Value::WIRE_REFERENCE && !current().inConnection) {
                errors.emplace_back(node.span, "@enumeration is required for attributes of type wire");
            }
        }

        pop();

        return Popup(title, text, popupType, rules, enumeration);
    }

    std::optional<Rule> SchemaCreator::loadRule(RuleNode node) {
        std::vector<IfStatement> statements;

        for (auto &stmt: node.statements) {
            auto condition = loadCondition(stmt.condition);
            if (condition) {
                statements.emplace_back(*condition,
                                        Action(toType(stmt.action.type.value), stmt.action.message.asString()));
            } else {
                return nullopt;
            }
        }

        return Rule(statements);
    }

    std::optional<Condition> SchemaCreator::loadCondition(ConditionNode node) {
        std::string function = node.functionName.value;

        for (auto &validator: validators) {
            if (validator->getName() == function) {
                if (validator->getSignature().size() == node.params.size()) {
                    std::vector<Value> params;
                    for (uint j = 0; j < validator->getSignature().size(); j++) {
                        bool exists = false;
                        auto type = toType(node.params[j]);
                        if (type.getType() == Value::UNDEFINED) {
                            if (current().doesAttributeExists(type.asReference(), validator->getSignature()[j])) {
                                exists = true;
                                type = Value::fromReference(type.asReference(), Value::ATTRIBUTE_REFERENCE);
                            }
                            if (validator->getSignature()[j] == Value::ADDRESS_SPACE) {
                                if (hasAddressSpace(type.asReference())) {
                                    exists = true;
                                    type = Value::fromReference(type.asReference(), Value::ADDRESS_SPACE_REFERENCE);
                                }
                            }

                            if (!exists) {
                                errors.emplace_back(node.functionName.span, "unknown reference " + type.asReference());
                            }
                        }
                        params.push_back(type);
                    }
                    return Condition(function, params, node.negated);
                } else {
                    errors.emplace_back(node.functionName.span, "wrong number of parameters");
                }
            }
        }

        errors.emplace_back(node.functionName.span, "unknown function name");
        return nullopt;
    }


    Schema *SchemaCreator::loadSchema(SchemaNode node, Library &library) {
        auto *schema = new Schema(library);

        for (auto &instance: node.instances) {
            if (library.hasComponent(instance.component.value)) {
                schema->componentInstances.push_back(loadComponentInstance(instance, library));
            }
            if (library.hasBus(instance.component.value)) {
                schema->busInstances.push_back(loadBusInstance(instance, library));
            }
        }

        for (auto &conn: node.connections) {
            auto firstComponent = schema->getComponentInstance(conn.first.instance.value);
            if (firstComponent == nullptr) {
                errors.emplace_back(conn.first.instance.span, "unknown component");
                continue;
            }
            if (!firstComponent->component.hasPin(conn.first.pin.value)) {
                errors.emplace_back(conn.first.pin.span, "unknown pin");
                continue;
            }


            ComponentInstance *secondComponent = nullptr;
            if (conn.second.has_value()) {
                secondComponent = schema->getComponentInstance(conn.second->instance.value);
                if (secondComponent == nullptr) {
                    errors.emplace_back(conn.second->instance.span, "unknown component");
                    continue;
                }
                if (!secondComponent->component.hasPin(conn.second->pin.value)) {
                    errors.emplace_back(conn.second->pin.span, "unknown pin");
                    continue;
                }
            }

            auto bus = schema->getBusInstance(conn.bus.value);
            if (bus == nullptr) {
                errors.emplace_back(conn.bus.span, "unknown bus");
                continue;
            }

            std::optional<Connection> connection = std::nullopt;
            if (secondComponent != nullptr) {
                ConnectionComponent firstConn{firstComponent->component.getName(), conn.first.pin.value};
                ConnectionComponent secondConn{secondComponent->component.getName(), conn.second->pin.value};

                if (library.hasConnection(firstConn,
                                          bus->bus.getName(),
                                          secondConn)) {
                    connection = *library.getConnection(firstConn, bus->bus.getName(), secondConn);
                } else {
                    errors.emplace_back(conn.span, "unknown connection");
                    continue;
                }
            } else {
                ConnectionComponent firstConn{firstComponent->component.getName(), conn.first.pin.value};

                if (library.hasConnection(firstConn,
                                          bus->bus.getName())) {
                    connection = *library.getConnection(firstConn, bus->bus.getName());
                } else {
                    errors.emplace_back(conn.span, "unknown connection");
                    continue;
                }
            }

            std::vector<InstanceAttribute> attributes;
            for (auto &attr: conn.attributes) {
                if (connection->hasAttribute(attr.name.value)) {
                    auto attribute = connection->getAttribute(attr.name.value);
                    auto value = toType(attr.value);

                    bool valueFound = false;

                    // all connection attributes must be of type enumeration
                    for (auto &en: attribute.getPopup()->getEnumeration()) {
                        if (en.getValue().equals(value)) {
                            valueFound = true;
                            break;
                        } else if(value.isType(Value::UNDEFINED)) {
                            if(en.getValue().isType(Value::WIRE_REFERENCE) && en.getValue().asReference() == value.asReference()) {
                                value = Value::fromReference(value.asReference(), Value::WIRE_REFERENCE);
                                valueFound = true;
                                break;
                            }
                        }
                    }
                    if (!valueFound) {
                        errors.emplace_back(attr.span, "invalid value");
                    }

                    attributes.emplace_back(attribute.getName(), value, attribute);
                } else {
                    errors.emplace_back(attr.name.span, "unknown attribute");
                }
            }

            if (secondComponent == nullptr) {
                schema->connections.push_back(
                        std::make_shared<BusConnectionInstance>(firstComponent, attributes, bus, *connection));
            } else {
                schema->connections.push_back(
                        std::make_shared<DirectConnectionInstance>(firstComponent, secondComponent, attributes, bus,
                                                                   *connection));
            }
        }

        if(errors.empty()) {
            return schema;
        } else {
            delete schema;
            return nullptr;
        }

    }

    shared_ptr<ComponentInstance> SchemaCreator::loadComponentInstance(InstanceNode instance, Library &library) {

        auto componentInstanceName = instance.name.value;
        auto position = std::make_pair(instance.position->first.value, instance.position->second.value);

        auto component = library.getComponent(instance.component.value);

        // validate attributes
        std::vector<InstanceAttribute> attributes;
        for (auto &attr: instance.attributes) {
            if (component.hasAttribute(attr.name.value, toType(attr.value.getType()))) {
                auto attribute = component.getAttribute(attr.name.value);
                attributes.emplace_back(attribute.getName(), toType(attr.value, attribute.getDefault().getType()),
                                        attribute);
            } else {
                errors.emplace_back(SourceError(attr.name.span, "unknown attribute"));
            }
        }

        if (attributes.size() < component.getAttributes().size()) {
            for (auto &attr: component.getAttributes()) {
                if (std::count_if(attributes.begin(), attributes.end(),
                                  [&attr](InstanceAttribute &attribute) { return attr.getName() == attribute.name; }) ==
                    0) {
                    errors.emplace_back(SourceError(instance.span, "missing attribute '" + attr.getName() + "'"));
                }
            }
        }

        return std::make_shared<ComponentInstance>(componentInstanceName, attributes, position, component);
    }

    std::shared_ptr<BusInstance> SchemaCreator::loadBusInstance(InstanceNode instance, Library &library) {

        auto busInstanceName = instance.name.value;
        auto position = std::make_pair(instance.position->first.value, instance.position->second.value);

        auto bus = library.getBus(instance.component.value);

        long long size = 0;
        if (instance.size) {
            size = instance.size->value;
        }

        return std::make_shared<BusInstance>(busInstanceName, position, bus, static_cast<int>(size));
    }

    vector<Enumeration> SchemaCreator::createWireEnumeration(vector<Value> wireValues) {
        vector<Enumeration> wires;
        for (auto &wire: wireValues) {
            if (wire.isType(Value::STRING)) {
                wires.emplace_back(wire.asString(), wire);
            }
        }
        return wires;
    }

    std::optional<Attribute> SchemaCreator::createMemoryAttribute() {
        return Attribute("_memory", Value::fromMemoryReference(std::nullopt), createMemoryPopup());
    }

    std::optional<Popup> SchemaCreator::createMemoryPopup() {
        return Popup("Postavi memoriju", "Postavi memoriju za izabrani procesor", Popup::AUTOMATIC, vector<Rule>{},
                     vector<Enumeration>{});
    }

    std::optional<Bus> SchemaCreator::getBus(std::string name) {
        for (auto &bus: buses) {
            if (bus.getName() == name) {
                return bus;
            }
        }
        return std::nullopt;
    }

    std::optional<Pin> SchemaCreator::getComponentPin(std::string name, std::string pin) {
        for (auto &c: components) {
            if (c.getName() == name) {
                for (auto &p: c.getPins()) {
                    if (p.getName() == pin) {
                        return p;
                    }
                }
            }
        }
        return nullopt;
    }

    bool SchemaCreator::hasAddressSpace(std::string name) {
        for (auto &as: addressSpaces) {
            if (as.getName() == name) {
                return true;
            }
        }
        return false;
    }

    void SchemaCreator::push(ComdelContext context) {
        this->context.push_back(context);
    }

    void SchemaCreator::pushAdditional(std::string name) {
        if (!this->context.empty()) {
            this->context.push_back(current());
            current().name = name;
        } else {
            ComdelContext con(name, false, false, false, false);
            push(con);
        }
    }

    ComdelContext &SchemaCreator::current() {
        return this->context[this->context.size() - 1];
    }

    void SchemaCreator::pop() {
        this->context.pop_back();
    }

    std::vector<SourceError> SchemaCreator::getErrors() {
        return errors;
    }

} // namespace domain