#include "HomeView.h"

#include "CreateProjWidget.h"
#include "ProjectStateWidget.h"
#include "ProjectManager.h"
#include "QFDAlert.h"
#include "QFDIcon.h"
#include "ProjectListWidget.h"
#include "QFDConfig.h"

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

#include <QBoxLayout>
#include <QLabel>

#include <QDebug>

HomeView::HomeView(QWidget *parent) : QWidget(parent) { }

void HomeView::showEvent(QShowEvent *event)
{
    if (m_initilized == false) {
        initWidgets();
        initLayout();
        connectSignalsAndSlots();
        m_initilized = true;
    }

    QWidget::showEvent(event);

    if (qfReloadHomeProjectsAtShow) {
        loadProjects();
        qfReloadHomeProjectsAtShow = false;
    }
}

void HomeView::hideEvent(QHideEvent *event)
{
    QWidget::hideEvent(event);
}

void HomeView::initWidgets()
{
    m_title = new QLabel(this);
    m_title->setText("评估项目管理");
    QFont ft("Microsoft YaHei", 12);
    m_title->setFont(ft);

    m_create = new PushButton("新建", NEWFLICON(FluentIcon, ADD), this);
    m_create->setToolTip("新建项目");

    m_search = new LineEdit(this);
    m_search->setIsClearButtonEnabled(true);
    m_search->setPlaceholderText("输入项目名搜索");
    m_search->setMinimumWidth(300);

    m_filter = new PushButton("搜索 / 刷新", NEWFLICON(QFDIcon, Filter), this);
    m_filter->setToolTip("搜索 / 刷新项目列表");

    m_projListWidget = new ProjectListWidget(this);

    m_createProjWidget = new CreateProjWidget(this);

    m_totalLab = new QLabel(this);
    m_pageLab  = new QLabel(this);
    m_previous = new PushButton("上一页", this);
    m_next     = new PushButton("下一页", this);
    m_first    = new PushButton("首页", this);
    m_final    = new PushButton("末页", this);
}

void HomeView::initLayout()
{
    // 总体布局
    m_layout = new QVBoxLayout(this);
    m_layout->setAlignment(Qt::AlignTop | Qt::AlignLeft);
    m_layout->setContentsMargins(15, 10, 10, 15);
    m_topLayout = new QHBoxLayout();
    m_layout->addLayout(m_topLayout);
    m_layout->addWidget(m_projListWidget);
    m_pageLayout = new QHBoxLayout();
    m_layout->addLayout(m_pageLayout);

    // 顶部布局
    m_topLayout->addWidget(m_title);
    m_topLayout->addSpacing(15);
    m_topLayout->addWidget(m_create, 1, Qt::AlignLeft);

    m_topLayout->addWidget(m_search, 0, Qt::AlignLeft);
    m_topLayout->addStretch();
    m_topLayout->addWidget(m_filter);

    m_pageLayout->addWidget(m_totalLab);
    m_pageLayout->addStretch();
    m_pageLayout->addWidget(m_first);
    m_pageLayout->addWidget(m_previous);
    m_pageLayout->addWidget(m_pageLab);
    m_pageLayout->addWidget(m_next);
    m_pageLayout->addWidget(m_final);
    m_pageLayout->addStretch();
}

void HomeView::connectSignalsAndSlots()
{
    connect(m_create, &PushButton::clicked, this, &HomeView::slotCreateProjClicked);
    connect(m_search, &LineEdit::textChanged, this, &HomeView::slotSearchTextChanged);
    connect(m_filter, &PushButton::clicked, this, &HomeView::slotFilterClicked);
    connect(m_createProjWidget, &CreateProjWidget::signalConfirm, this, &HomeView::slotProjInfoConfirmed);
    connect(m_projListWidget, &ProjectListWidget::sigOpen, this, &HomeView::slotOpenProject);
    connect(m_projListWidget, &ProjectListWidget::sigInfo, this, &HomeView::slotProjectInfo);
    connect(m_projListWidget, &ProjectListWidget::sigDelete, this, &HomeView::slotDeleteProject);
    connect(m_previous, &PushButton::clicked, this, &HomeView::slotPreviousClicked);
    connect(m_next, &PushButton::clicked, this, &HomeView::slotNextClicked);
    connect(m_first, &PushButton::clicked, this, &HomeView::slotFirstClicked);
    connect(m_final, &PushButton::clicked, this, &HomeView::slotFinalClicked);
}

void HomeView::loadProjects()
{
    qDeleteAll(m_projList);
    m_projList.clear();
    int code = ProjectManager::queryProjects(&m_projList, m_total, m_page, m_pageSize, m_search->text());

    if (code != QF_CODE_SUCCEEDED) {
        QFDAlert::showAlertWithCode(code, this);
        return;
    }

    m_totalLab->setText(QString("共%1条, 每页%2条").arg(m_total).arg(m_pageSize));
    m_pageLab->setText(QString("第 %1/%2 页").arg(m_page).arg(finalPage()));

    m_projListWidget->setProjects(m_projList);
}

int HomeView::firstPage() const
{
    return 1;
}

int HomeView::finalPage() const
{
    int p = m_total / m_pageSize + (m_total % m_pageSize > 0 ? 1 : 0);
    return std::max(p, firstPage());
}

void HomeView::slotCreateProjClicked()
{
    if (m_createProjWidget->isVisible() == false) {
        m_createProjWidget->setMode(CreateProjWidget::Create);
        m_createProjWidget->resetInputs();
        m_createProjWidget->show();
    }
}

void HomeView::slotSearchTextChanged() { }

void HomeView::slotFilterClicked()
{
    m_page = firstPage();
    loadProjects();
}

/// @todo 修改或者新建项目后, 列表移到该条目
void HomeView::slotProjInfoConfirmed()
{
    int code               = -1;
    ProjectInfo *info      = m_createProjWidget->projInfo();
    ProjectInfo editedInfo = m_createProjWidget->editedProjInfo();

    if (m_createProjWidget->mode() == CreateProjWidget::Create) {
        code = ProjectManager::insertProject(editedInfo);
    } else if (m_createProjWidget->mode() == CreateProjWidget::Update) {
        editedInfo.id = m_createProjWidget->projInfo()->id;
        code          = ProjectManager::updateProject(editedInfo);
    } else {
        return;
    }

    QFDAlert::showAlertWithCode(code, m_createProjWidget);
    if (code == QF_CODE_SUCCEEDED) {
        m_createProjWidget->close();
        m_search->clear();
        loadProjects();
    }
}

void HomeView::slotProjectInfo(ProjectInfo *proj)
{
    if (m_createProjWidget->isVisible() == false) {
        m_createProjWidget->setMode(CreateProjWidget::Info);
        m_createProjWidget->setProjectInfo(proj);
        m_createProjWidget->show();
    }
}

void HomeView::slotOpenProject(ProjectInfo *proj)
{
    emit sigOpenProject(proj);
}

void HomeView::slotDeleteProject(ProjectInfo *proj)
{
    QString title = "删除工程 “" + proj->projectName + "” ?";
    MessageBox *m = new MessageBox(title, "删除后无法恢复", this);

    if (m->exec()) {
        int code = ProjectManager::deleteProject(proj->id);
        QFDAlert::showAlertWithCode(code, this);
        if (code == QF_CODE_SUCCEEDED) {
            m_projList.removeOne(proj);
            m_projListWidget->removeProject(proj);
        }
    }
}

void HomeView::slotPreviousClicked()
{
    m_page--;
    m_page = std::max(m_page, firstPage());
    loadProjects();
}

void HomeView::slotNextClicked()
{
    m_page++;
    m_page = std::min(m_page, finalPage());
    loadProjects();
}

void HomeView::slotFirstClicked()
{
    m_page = firstPage();
    loadProjects();
}

void HomeView::slotFinalClicked()
{
    m_page = finalPage();
    loadProjects();
}