#include "CreateSchemeWidget.h"

#include <Widgets/Button.h>
#include <Widgets/LineEdit.h>

#include <QBoxLayout>
#include <QLabel>
#include <QDebug>
#include <QFileDialog>

static const QString kNullImageTag = "无效图片";

CreateSchemeWidget::CreateSchemeWidget(QWidget *parent) : QDialog(parent)
{
    initWindow();
    initialize();
    initLayout();
    connectSignalsAndSlots();
}

void CreateSchemeWidget::clearInputs()
{
    m_nameEdit->clear();
    m_schemeEdit->clear();
    m_picLine->clear();
}

void CreateSchemeWidget::showEvent(QShowEvent *e)
{
    QDialog::showEvent(e);
    clearInputs();
}

void CreateSchemeWidget::initWindow()
{
    setWindowTitle("新建方案");
    setModal(true);
    setWindowFlags(Qt::Dialog);
    setWindowFlag(Qt::WindowContextHelpButtonHint, false);
    resize(370, 350);
}

void CreateSchemeWidget::initialize()
{
    m_vBoxLayout = new QVBoxLayout(this);
    m_gridLayout = new QGridLayout();
    m_nameLabel  = new QLabel("方案名称：", this);
    m_nameLabel->setFixedHeight(44);
    m_nameEdit = new LineEdit(this);
    m_nameEdit->setFixedWidth(250);
    m_schemeLabel = new QLabel("方案描述：", this);
    m_schemeLabel->setFixedHeight(35);
    m_schemeEdit = new TextEdit(this);
    m_schemeEdit->setObjectName("textEdit");
    m_schemeEdit->setFixedWidth(250);
    m_schemeEdit->setFixedHeight(150);
    m_picButton = new PushButton("方案图片", this);
    m_picLine   = new LineEdit(this);
    m_picLine->setFixedWidth(250);
    m_picLine->setEnabled(false);

    m_hBoxLayout   = new QHBoxLayout();
    m_confirButton = new PushButton("生成", this);
    m_confirButton->setEnabled(false);
}

void CreateSchemeWidget::initLayout()
{
    m_vBoxLayout->setMargin(15);

    m_vBoxLayout->addLayout(m_gridLayout);
    m_gridLayout->addWidget(m_nameLabel, 0, 0, 1, 1, Qt::AlignRight);
    m_gridLayout->addWidget(m_nameEdit, 0, 1, 1, 2, Qt::AlignLeft);
    m_gridLayout->addWidget(m_schemeLabel, 1, 0, 1, 1, Qt::AlignRight | Qt::AlignTop);
    m_gridLayout->addWidget(m_schemeEdit, 1, 1, 1, 2, Qt::AlignLeft);
    m_gridLayout->addWidget(m_picButton, 2, 0, 1, 1, Qt::AlignRight);
    m_gridLayout->addWidget(m_picLine, 2, 1, 1, 2, Qt::AlignLeft);

    m_vBoxLayout->addSpacing(20);
    m_vBoxLayout->addStretch();

    m_vBoxLayout->addLayout(m_hBoxLayout);
    m_hBoxLayout->addStretch();
    m_hBoxLayout->addWidget(m_confirButton);
}

void CreateSchemeWidget::connectSignalsAndSlots()
{
    connect(m_picButton, &QPushButton::clicked, this, &CreateSchemeWidget::slotSelectPic);
    connect(m_nameEdit, &LineEdit::textChanged, this, &CreateSchemeWidget::slotContentChanged);
    connect(m_schemeEdit, &TextEdit::textChanged, this, &CreateSchemeWidget::slotContentChanged);
    connect(m_picLine, &LineEdit::textChanged, this, &CreateSchemeWidget::slotContentChanged);
    connect(m_confirButton, &PushButton::clicked, this, &CreateSchemeWidget::slotConfirmed);
}

void CreateSchemeWidget::slotSelectPic()
{
    QString fileName = QFileDialog::getOpenFileName(nullptr, "Open Image", "", "images(*.bmp *.png *.jpg *.webp)");

    QFile file(fileName);
    file.open(QIODevice::ReadOnly);
    QByteArray data = file.readAll();
    QPixmap pixmap;
    pixmap.loadFromData(data);

    if (pixmap.isNull()) {
        m_picLine->setText(kNullImageTag);
    } else {
        m_picLine->setText(fileName);
    }
}

void CreateSchemeWidget::slotContentChanged()
{
    bool valid = m_nameEdit->text().length() > 0 && m_schemeEdit->toPlainText().length() > 0
            && m_picLine->text().length() > 0 && m_picLine->text() != kNullImageTag;
    m_confirButton->setEnabled(valid);
}

void CreateSchemeWidget::slotConfirmed()
{
    emit sigSchemeInfoConfirmed(m_nameEdit->text(), m_schemeEdit->toPlainText(), m_picLine->text());
    close();
}