#include "SplitPanel.h"
#include "DockPanel.h"
#include <QPainter>
#include <libConfig.h>

using namespace split_frame;
using namespace split_panel;
using namespace Config;

DragSplitter::DragSplitter(split_frame::SplitType split, split_frame::ViewRes *parent)
    : QFrame(parent->widget()){
    this->setFrameShape(QFrame::Shape::WinPanel);
    this->setFrameShadow(QFrame::Shadow::Raised);

    switch (split) {
    case split_frame::SplitType::SPLIT_H_LFIRST:
    case split_frame::SplitType::SPLIT_H_RFIRST:
        this->setCursor(Qt::CursorShape::SplitHCursor);
        break;
    default:
        this->setCursor(Qt::CursorShape::SizeVerCursor);
    }
}

void DragSplitter::mouseMoveEvent(QMouseEvent *event)
{
    QFrame::mouseMoveEvent(event);
    emit this->adjustRequest(mapToParent(event->pos()));
}


//=====================================================
SplitPanel::SplitPanel(ResManager *mgr, SplitType split)
    : QWidget(nullptr),
      manager_inst(mgr),
      parent_inst(nullptr),
      splitter_inst(new DragSplitter(split, this))
{
    connect(this->splitter_inst, &DragSplitter::adjustRequest, this, &SplitPanel::splitter_adjust);
    this->split_info = std::make_tuple(split, 0.5, 8);
}

#include <QDebug>
SplitPanel::~SplitPanel() {

}

void SplitPanel::resizeEvent(QResizeEvent *e)
{
    QWidget::resizeEvent(e);
    this->sync_status();
}

ResManager *SplitPanel::splitManager() const { return this->manager_inst; }

SplitView *SplitPanel::parentRes() const { return parent_inst; }

void SplitPanel::setParentRes(SplitView *inst) {
    this->parent_inst = inst;
    if(inst){
        this->setParent(inst->widget());
    }
    else{
        this->setParent(nullptr);
    }
}

qulonglong SplitPanel::hashCode() const { return (qulonglong)this; }

void SplitPanel::setVisible(bool state)
{
    QWidget::setVisible(state);
}

bool SplitPanel::isVisible() const
{
    return QWidget::isVisible();
}

void SplitPanel::initViews(ViewRes *a, ViewRes *b)
{
    a->setParentRes(this);
    manager_inst->appendPresentView(dynamic_cast<ViewBase*>(a));
    b->setParentRes(this);
    manager_inst->appendPresentView(dynamic_cast<ViewBase*>(b));
    this->split_member = std::make_pair(a, b);
}

QWidget *SplitPanel::widget() const { return const_cast<SplitPanel *>(this); }

QSizeF SplitPanel::stiffSize() const
{
    auto size_a = split_member.first->stiffSize();
    auto size_b = split_member.second->stiffSize();

    switch (this->splitType()) {
    case SplitType::SPLIT_H_LFIRST:
    case SplitType::SPLIT_H_RFIRST:
        return QSizeF(size_a.width() + size_b.width() + std::get<2>(split_info), std::max(size_a.height(), size_b.height()));
    default:
        return QSizeF(std::max(size_a.width(), size_b.width()), size_a.height() + size_b.height() + std::get<2>(split_info));
    }
}

QRectF SplitPanel::outlineRect() const { return this->rect(); }

void SplitPanel::setOutline(const QRectF &outline)
{
    if(outline != this->outlineRect()){
        this->setGeometry(outline.toRect());
        this->sync_status();
    }
}

std::pair<ViewRes *, int> SplitPanel::except(ViewRes *inst) const
{
    if(!contains(inst))
        throw new SimpleException<QString>("运行异常", "传入的视图实例不属于本组件");

    if(split_member.first == inst)
        return std::make_pair(split_member.second, 1);
    return std::make_pair(split_member.first, 0);
}

bool SplitPanel::contains(ViewRes *inst) const
{
    return split_member.first == inst || split_member.second == inst;
}

void SplitPanel::replaceView(ViewRes *_new, ViewRes *_old)
{
    if(!contains(_old)){
        throw new SimpleException<QString>("运行异常", "指定替换的视图不属于本组件");
    }

    auto elsev = except(_old);
    _new->setParentRes(this);
    switch (elsev.second) {
    case 0:
        this->split_member = std::make_pair(elsev.first, _new);
        break;
    default:
        this->split_member = std::make_pair(_new, elsev.first);
    }

    _old->setParentRes(nullptr);
    sync_status();
    this->update();
}

float SplitPanel::splitterWidth() const
{
    return std::get<2>(split_info);
}

float SplitPanel::splitterPos() const
{
    return std::get<1>(split_info);
}

SplitType SplitPanel::splitType() const
{
    return std::get<0>(split_info);
}

void SplitPanel::setSplitInfo(float pos, float width)
{
    this->split_info = std::make_tuple(std::get<0>(split_info), pos, width);
    this->sync_status();
    this->update();
}


void SplitPanel::sync_status()
{
    auto total_w = this->width();
    auto total_h = this->height();
    switch (std::get<0>(split_info)) {
    case SplitType::SPLIT_H_LFIRST:
    case SplitType::SPLIT_H_RFIRST: {
        auto width_a = total_w * std::get<1>(split_info);
        auto width_b = total_w - width_a - std::get<2>(split_info);

        auto first = this->split_member.first;
        auto second = this->split_member.second;

        first->setOutline(QRectF(0, 0, width_a, total_h));
        second->setOutline(QRectF(width_a + std::get<2>(split_info), 0, width_b, total_h));
        this->splitter_inst->setGeometry(QRect(width_a, 0, std::get<2>(split_info), total_h));
    } break;
    case SplitType::SPLIT_V_BFIRST:
    case SplitType::SPLIT_V_TFIRST: {
        auto height_a = total_h * std::get<1>(split_info);
        auto height_b = total_h - height_a - std::get<2>(split_info);

        auto first = this->split_member.first;
        auto second = this->split_member.second;
        first->setOutline(QRectF(0, 0, total_w, height_a));
        second->setOutline(QRectF(0, height_a + std::get<2>(split_info) - 1, total_w, height_b + 1));
        splitter_inst->setGeometry(QRect(0, height_a, total_w, std::get<2>(split_info)));
    } break;
    }

    split_member.first->setVisible(true);
    split_member.second->setVisible(true);
}

void SplitPanel::splitter_adjust(const QPoint &pos)
{
    switch (std::get<0>(split_info)) {
    case SplitType::SPLIT_H_LFIRST:
    case SplitType::SPLIT_H_RFIRST:{
        auto lwidth = split_member.first->stiffSize().width();
        auto rwidth = split_member.second->stiffSize().width();
        if(pos.x() >= lwidth && pos.x() <= this->width() - rwidth - std::get<2>(split_info))
            this->split_info = std::make_tuple(std::get<0>(split_info), pos.x()/(float)this->width(), std::get<2>(split_info));
    }break;
    case SplitType::SPLIT_V_BFIRST:
    case SplitType::SPLIT_V_TFIRST:{
        auto theight = split_member.first->stiffSize().height();
        auto bheight = split_member.second->stiffSize().height();
        if(pos.y() >= theight && pos.y() <= this->height() - bheight - std::get<2>(split_info))
            this->split_info = std::make_tuple(std::get<0>(split_info), pos.y()/(float)this->height(), std::get<2>(split_info));
    }break;
    }

    this->sync_status();
}