#include "DataTableWidget.h"

#include "ProjectManager.h"
#include <dbService/CNodeDataService.h>
#include <dbService/ClassSet.h>

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

#include <QTabWidget>
#include <QLabel>
#include <QTableView>
#include <QTableWidget>
#include <QAbstractItemModel>
#include <QStandardItemModel>
#include <QStandardItem>
#include <QHeaderView>

#include <QDebug>

DataTableWidget::DataTableWidget(ProjectInfo *proj, int indexType, QWidget *parent)
    : QWidget(parent), m_proj(proj), m_indexType(indexType)
{
    m_mind1 = new CMind(this);
    m_mind2 = new CMind(this);
    initWidget();
    initLayout();
    connectSignalsAndSlots();
    setupMind();
    setCurrentPage(1);
}

void DataTableWidget::initWidget()
{
    m_dataTab = new QTabWidget(this);
    m_dataTab->setTabPosition(QTabWidget::South);
    m_pageLab  = new QLabel(this);
    m_previous = new PushButton("上一级指标", this);
    m_next     = new PushButton("下一级指标", this);
}

void DataTableWidget::initLayout()
{
    m_layout = new QVBoxLayout(this);
    m_layout->addWidget(m_dataTab);
    m_pageLayout = new QHBoxLayout();
    m_layout->addLayout(m_pageLayout);

    m_pageLayout->setSpacing(10);
    m_pageLayout->addStretch();
    m_pageLayout->addWidget(m_previous);
    m_pageLayout->addWidget(m_pageLab);
    m_pageLayout->addWidget(m_next);
    m_pageLayout->addStretch();
}

void DataTableWidget::connectSignalsAndSlots()
{
    connect(m_previous, &PushButton::clicked, this, &DataTableWidget::slotPrevious);
    connect(m_next, &PushButton::clicked, this, &DataTableWidget::slotNext);
    connect(m_dataTab, &QTabWidget::currentChanged, this, &DataTableWidget::slotTabCurrentChanged);
}

void DataTableWidget::setupMind()
{
    QList<CNodeData> list;
    bool ret = CNodeDataService().QueryAll(list, m_proj->id, m_indexType);
    if (ret) {
        m_mind1->setNodeList(list);
    }

    if (m_indexType == ProjectManager::TechIndex) {
        QList<CNodeData> list;
        bool ret = CNodeDataService().QueryAll(list, m_proj->id, ProjectManager::AbilityIndex);
        if (ret) {
            m_mind2->setNodeList(list);
        }
    }
}

void DataTableWidget::setupTabWidget()
{
    /// 创建 tableView 并添加进 tabWidget
    /// 这个过程中会触发 tabWidget 的 currentChanged,
    /// 所以使用 m_isSettingTable 标记此过程, 以采取必要措施来规避一些异常操作
    m_isSettingTable = true;
    m_dataTab->clear();
    for (CNodeData n : m_mind1->nodesInLevel(m_currentPage)) {
        QTableView *t = new QTableView(m_dataTab);
        t->setAlternatingRowColors(m_indexType == ProjectManager::TechIndex);
        t->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
        t->horizontalHeader()->setStyleSheet("QHeaderView::section{background:rgb(244,244,244);color: black;}");
        t->verticalHeader()->setStyleSheet("QHeaderView::section{background:rgb(244,244,244);color: black;}");
        t->verticalHeader()->setDefaultAlignment(Qt::AlignCenter);
        t->setSelectionMode(QAbstractItemView::SingleSelection);

        m_dataTab->addTab(t, n.name);

        QStandardItemModel *model = new QStandardItemModel(t);
        t->setModel(model);
    }
    m_isSettingTable = false;
}

int DataTableWidget::currentPage() const
{
    return m_currentPage;
}

void DataTableWidget::setCurrentPage(int p)
{
    if (p < 1 || p >= m_mind1->levels()) {
        return;
    }
    m_currentPage = p;

    setupTabWidget();

    m_pageLab->setText(QString("共 %1 页, 当前第 %2 页").arg(m_mind1->levels() - 1).arg(p));
    updateCurrentTable();
}

void DataTableWidget::updateCurrentTable()
{
    int c             = m_dataTab->currentIndex();
    QTableView *table = (QTableView *)m_dataTab->widget(c);

    if (table == nullptr || table->model() == nullptr || m_isSettingTable) {
        return;
    }

    // 设置顶部水平方向标题
    QStandardItemModel *model = (QStandardItemModel *)table->model();
    CNodeData n               = m_mind1->nodesInLevel(m_currentPage)[c];
    QList<CNodeData> hList    = m_mind1->subNodes(n);
    for (int i = 0; i < hList.count(); i++) {
        CNodeData node      = hList[i];
        QStandardItem *item = new QStandardItem(node.name);
        item->setToolTip(node.remark);
        model->setHorizontalHeaderItem(i, item);
    }

    // 设置左侧垂直方向标题
    QList<CNodeData> vList = hList;
    if (m_indexType == ProjectManager::TechIndex) {
        vList = m_mind2->nodesInFinalLevel();
    }
    for (int i = 0; i < vList.count(); i++) {
        CNodeData node      = vList[i];
        QStandardItem *item = new QStandardItem(QString("  %1  ").arg(node.name));
        item->setToolTip(node.remark);
        model->setVerticalHeaderItem(i, item);
        table->setRowHeight(i, 35);
    }

    // 填充单元格
    for (int i = 0; i < vList.count(); i++) {
        for (int j = 0; j < hList.count(); j++) {
            QStandardItem *item = new QStandardItem();
            item->setEditable(false);
            if (m_indexType != ProjectManager::TechIndex) {
                if (i == j) {
                    item->setText("1");  // 对角线
                }
                if (i >= j) {
                    item->setBackground(QBrush(QColor("lightgray")));  // 左下方
                }
            }
            item->setData(Qt::AlignCenter, Qt::TextAlignmentRole);  // 单元格文字居中
            model->setItem(i, j, item);
        }
    }
}

void DataTableWidget::slotPrevious()
{
    setCurrentPage(m_currentPage - 1);
}

void DataTableWidget::slotNext()
{
    setCurrentPage(m_currentPage + 1);
}

void DataTableWidget::slotTabCurrentChanged(int c)
{
    Q_UNUSED(c)
    updateCurrentTable();
}