#include "attribute_dialog.h"
#include "mainwindow.h"

#include "application.h"
#include "error_dialog.h"
#include "warning_dialog.h"
#include "message_source.h"
#include <stdexcept>

namespace display {

    long long int parseInt(std::string expression) {
        try {
            if (expression.size() > 2) {
                if (expression.substr(0, 2) == "0x") {
                    return std::stoll(expression, nullptr, 16);
                } else if (expression.substr(0, 2) == "0b") {
                    return std::stoll(expression, nullptr, 2);
                } else {
                    return std::stoll(expression, nullptr, 10);
                }
            } else {
                return std::stoll(expression, nullptr, 10);
            }
        } catch (std::exception &e) {
            return 0;
        }
    }

    AttributeDialog::AttributeDialog(std::string title, std::string action, domain::InstanceAttribute *attribute):
            GenericDialog(title, action), attributeValue(attribute), value(attribute->value), popup(*attribute->attribute.getPopup()) {

        auto *contentLayout = new QVBoxLayout();
        content->setLayout(contentLayout);

        contentLayout->addWidget(new QLabel(popup.getTitle().c_str()));
        contentLayout->addWidget(new QLabel(popup.getText().c_str()));

        auto type = attribute->value.getType();

        if(popup.isEnumerated()) {
            contentLayout->addWidget(setupEnumeration());
        } else if(type == domain::Value::INT || type == domain::Value::STRING) {
            contentLayout->addWidget(setupLineEdit(type));
        } else if(type == domain::Value::BOOL) {
            contentLayout->addWidget(setupBool());
        }
    }

    bool AttributeDialog::onUpdate() {
        auto validationErrors = validate();
        if (validationErrors.empty()) {
            attributeValue->value = value;
            return true;
        }

        std::vector<domain::ValidationError> errors, warnings;
        for (auto &err: validationErrors) {
            if (err.type == domain::Action::ERROR) {
                errors.push_back(err);
            } else {
                warnings.push_back(err);
            }
        }

        if (!errors.empty()) {
            auto errorDialog = new ErrorDialog(errors);
            errorDialog->exec();
            return false;
        }

        bool canAccept = true;
        for (auto &warning: warnings) {
            auto warningDialog = new WarningDialog(warning);
            int response = warningDialog->exec();
            if (response == QDialog::Rejected) {
                canAccept = false;
            }
        }
        if(canAccept) {
            attributeValue->value = value;
        }
        return canAccept;
    }

    void AttributeDialog::onTextChanged(const QString &string) {
        switch (value.getType()) {
            case domain::Value::STRING:
                value.setString(string.toStdString());
                break;
            case domain::Value::INT:
                value = domain::Value::fromInt(parseInt(string.toStdString()));
                break;
            default:
                throw std::runtime_error("invalid value type in text change");
        }
    }

    void AttributeDialog::onEnumerationChanged(int index) {
        value = attributeValue->attribute.getPopup()->getEnumeration()[index].getValue();
    }

    QComboBox *AttributeDialog::setupEnumeration() {
        auto *combo = new QComboBox(this);

        auto enumeration = popup.getEnumeration();
        for (auto entry: enumeration) {
            combo->addItem(QString::fromStdString(entry.getName()));
        }
        connect(combo, QOverload<int>::of(&QComboBox::currentIndexChanged), this,
                &AttributeDialog::onEnumerationChanged);

        for (int i = 0; i < enumeration.size(); i++) {
            if (attributeValue->value.equals(enumeration[i].getValue())) {
                combo->setCurrentIndex(i);
                break;
            }
        }

        return combo;
    }

    QLineEdit *AttributeDialog::setupLineEdit(domain::Value::ValueType type) {
        auto edit = new QLineEdit(this);
        connect(edit, &QLineEdit::textChanged, this, &AttributeDialog::onTextChanged);

        switch (type) {
            case domain::Value::ValueType::INT:
                edit->setValidator(new QIntValidator(-10000000, 10000000, edit));
                edit->insert(std::to_string(value.asInt()).c_str());
                break;
            case domain::Value::ValueType::STRING:
                edit->insert(value.asString().c_str());
                break;
        }
        return edit;
    }

    QGroupBox *AttributeDialog::setupBool() {
        auto *group = new QGroupBox(this);

        auto *radioLayout = new QHBoxLayout(group);
        group->setLayout(radioLayout);

        auto isTrue = new QRadioButton(QMESSAGE("msg_boolean_true"), group);
        connect(isTrue, &QRadioButton::clicked, [this]() {
            this->value = domain::Value::fromBool(true);
        });
        auto isFalse = new QRadioButton(QMESSAGE("msg_boolean_false"), group);
        connect(isFalse, &QRadioButton::clicked, [this]() {
            this->value = domain::Value::fromBool(false);
        });

        if (value.asBool()) {
            isTrue->setChecked(true);
        } else {
            isFalse->setChecked(true);
        }

        radioLayout->addWidget(isTrue);
        radioLayout->addWidget(isFalse);

        return group;
    }

    std::vector<domain::ValidationError> AttributeDialog::validate() {
        domain::ComdelValidator validator(domain::getSupportedValidators());

        auto currentValue = attributeValue->value;
        attributeValue->value = value;
        domain::ValidationContext context;

        for (auto &addressSpace: Application::instance()->getLibrary()->getAddressSpaces()) {
            context.addressSpaces.insert(std::make_pair(addressSpace.getName(), addressSpace));
        }

        auto errors = validator.validateAttribute(attributeValue, context);
        attributeValue->value = currentValue;
        return errors;
    }

}