#include "layer.h"
#include "main.h"
#include "planpanel.h"
#include <QDirIterator>
#include <QLabel>
#include <QPainter>
#include <QSpinBox>
#include <QtMath>
#include <QMouseEvent>
#include <QGraphicsVideoItem>
#include <QOpenGLWidget>

void Layer::paintEvent(QPaintEvent *) {
    QPainter painter(this);
    if(gEditView->selected == this) {
        painter.setPen(item ? Qt::cyan : Qt::green);
        painter.drawRect(0, 0, width(), height());
        painter.drawRect(hdlLT);
        painter.drawRect(hdlT);
        painter.drawRect(hdlRT);
        painter.drawRect(hdlL);
        painter.drawRect(hdlR);
        painter.drawRect(hdlLB);
        painter.drawRect(hdlB);
        painter.drawRect(hdlRB);
    } else {
        painter.setPen(item ? Qt::darkCyan : Qt::darkGreen);
        painter.drawRect(0, 0, width(), height());
    }

    QRectF rect(8, 8, width()-16, height()-16);
    if(item) painter.drawText(rect, QString("%1\n%2×%3").arg(name).arg(sSize.width()).arg(sSize.height()), QTextOption(Qt::AlignCenter));
    else {
        painter.drawText(rect, QString("%1 %2").arg(name).arg(idx), QTextOption(Qt::AlignLeft | Qt::AlignTop));
        painter.drawText(rect, QString("%1×%2").arg(sSize.width()).arg(sSize.height()), QTextOption(Qt::AlignRight | Qt::AlignBottom));
    }

    //吸附 high light
    if(gEditView->selected != this)painter.setPen(item ? Qt::cyan : Qt::green);
    if(snapLR==1) painter.drawLine(0, 0, 0, height());
    else if(snapLR==2) painter.drawLine(width(), 0, width(), height());
    if(snapTB==1) painter.drawLine(0, 0, width(), 0);
    else if(snapTB==2) painter.drawLine(0, height(), width(), height());
}

void Layer::mousePressEvent(QMouseEvent *e) {
    QWidget::mousePressEvent(e);
    if(e->button() != Qt::LeftButton) return;
    if(item) {
        if(! gOutPanel->isVisible()) return;
        if(gEditView->selected!=this) {
            gOutPanel->enCurChanged = false;
            gOutPanel->tree->setCurrentItem(item);
            gOutPanel->enCurChanged = true;
        }
    } else if(gOutPanel->isVisible()) return;
    gEditView->select(this);
    setFrmSec(e->pos());
    auto mousePos = e->globalPosition();
    auto elePos = pos();
    if(mFrmSec==Qt::TitleBarArea || mFrmSec==Qt::TopSection || mFrmSec==Qt::LeftSection || mFrmSec==Qt::TopLeftSection) mPressRel = elePos - mousePos;
    else if(mFrmSec==Qt::BottomRightSection) mPressRel = QPointF(width() - mousePos.x(), height() - mousePos.y());
    else if(mFrmSec==Qt::RightSection      ) mPressRel = QPointF(width() - mousePos.x(), height()               );
    else if(mFrmSec==Qt::BottomSection     ) mPressRel = QPointF(width()               , height() - mousePos.y());
    else if(mFrmSec==Qt::TopRightSection   ) mPressRel = QPointF(elePos.x()+width() - mousePos.x(), elePos.y()         - mousePos.y());
    else if(mFrmSec==Qt::BottomLeftSection ) mPressRel = QPointF(elePos.x()        - mousePos.x(), elePos.y()+height() - mousePos.y());
    else if(mFrmSec==Qt::NoSection) mPressRel.setX(FLT_MAX);

    rowIdx = 0;
    for(; rowIdx<gTableV->rowCount(); ++rowIdx) if((Layer*)gTableV->data(rowIdx, 0).toULongLong()==this) break;
}

void Layer::mouseReleaseEvent(QMouseEvent *event) {
    QWidget::mouseReleaseEvent(event);
    if(Qt::LeftButton == event->button()) {
        mPressRel.setX(FLT_MAX);
        for(auto layer : gEditView->layers) layer->clearSnap();
    }
}
#define SnapSpace 6
void Layer::mouseMoveEvent(QMouseEvent *e) {
    if(! (e->buttons() & Qt::LeftButton)) {
        setFrmSec(e->pos());
        return;
    }
    if(gEditView->selected != this) return;
    if(mFrmSec==Qt::NoSection || mPressRel.x()>=FLT_MAX) return;
    auto mousePos = e->globalPosition();
    auto dstHor = mPressRel.x() + mousePos.x();
    auto dstVer = mPressRel.y() + mousePos.y();
    bool posChanged = false, sizeChanged = false;
    for(auto layer : gEditView->layers) layer->clearSnap();
    if(mFrmSec==Qt::TitleBarArea) {
        if(snapLR==0) for(auto layer : gEditView->layers) if(layer!=this) {//左右
            if(fabs(dstHor - layer->x()) < SnapSpace) {
                dstHor = layer->x();
                snapLR = 1;
                layer->snapLR = 1;
                layer->update();
                break;
            }
            auto eleRight = layer->x() + layer->width();
            if(fabs(dstHor - eleRight) < SnapSpace) {
                dstHor = eleRight;
                snapLR = 1;
                layer->snapLR = 2;
                layer->update();
                break;
            }
            auto right = dstHor + width();
            if(fabs(right - layer->x()) < SnapSpace && layer->x() - width() >= 0) {
                dstHor = layer->x() - width();
                snapLR = 2;
                layer->snapLR = 1;
                layer->update();
                break;
            }
            if(fabs(right - eleRight) < SnapSpace && eleRight - width() >= 0) {
                dstHor = eleRight - width();
                snapLR = 2;
                layer->snapLR = 2;
                layer->update();
                break;
            }
        }
        if(snapTB==0) for(auto layer : gEditView->layers) if(layer!=this) {//上下
            if(fabs(dstVer-layer->y()) < SnapSpace) {
                dstVer = layer->y();
                snapTB = 1;
                layer->snapTB = 1;
                layer->update();
                break;
            }
            auto eleBtm = layer->y() + layer->height();
            if(fabs(dstVer - eleBtm) < SnapSpace) {
                dstVer = eleBtm;
                snapTB = 1;
                layer->snapTB = 2;
                layer->update();
                break;
            }
            auto btm = dstVer + height();
            if(fabs(btm - layer->y()) < SnapSpace && layer->y() - height() >= 0) {
                dstVer = layer->y() - height();
                snapTB = 2;
                layer->snapTB = 1;
                layer->update();
                break;
            }
            if(fabs(btm - eleBtm) < SnapSpace && eleBtm - height() >= 0) {
                dstVer = eleBtm - height();
                snapTB = 2;
                layer->snapTB = 2;
                layer->update();
                break;
            }
        }
        move(dstHor, dstVer);
        posChanged = true;
    } else if(mFrmSec==Qt::BottomRightSection) {
        if(dstHor < HandleSize) dstHor = HandleSize;
        if(dstVer < HandleSize) dstVer = HandleSize;
        resize(dstHor, dstVer);
        sizeChanged = true;
    } else if(mFrmSec==Qt::RightSection) {
        if(dstHor < HandleSize) dstHor = HandleSize;
        auto right = x() + dstHor;
        for(Layer *layer : gEditView->layers) if(layer!=this) {//左右
            if(fabs(right - layer->x()) < SnapSpace) {
                dstHor = layer->x() - x();
                snapLR = 2;
                layer->snapLR = 1;
                layer->update();
                break;
            }
            auto eleRight = layer->x() + layer->width();
            if(fabs(right - eleRight) < SnapSpace) {
                dstHor = eleRight - x();
                snapLR = 2;
                layer->snapLR = 2;
                layer->update();
                break;
            }
        }
        resize(dstHor, mPressRel.y());
        sizeChanged = true;
    } else if(mFrmSec==Qt::BottomSection) {
        if(dstVer < HandleSize) dstVer = HandleSize;
        auto btm = y() + dstVer;
        for(Layer *layer : gEditView->layers) if(layer!=this) {//上下
            auto eleBtm = layer->y() + layer->height();
            if(fabs(btm - layer->y()) < SnapSpace) {
                dstVer = layer->y() - y();
                snapTB = 2;
                layer->snapTB = 1;
                layer->update();
                break;
            }
            if(fabs(btm - eleBtm) < SnapSpace) {
                dstVer = eleBtm - y();
                snapTB = 2;
                layer->snapTB = 2;
                layer->update();
                break;
            }
        }
        resize(mPressRel.rx(), dstVer);
        sizeChanged = true;
    } else {
        QRectF geo(x(), y(), width(), height());
        if(mFrmSec==Qt::LeftSection) {
            dstHor = qMin(dstHor, geo.right() - HandleSize);
            if(dstHor > 8) for(auto layer : gEditView->layers) if(layer!=this) {//左右
                if(fabs(dstHor - layer->x()) < SnapSpace) {
                    dstHor = layer->x();
                    snapLR = 1;
                    layer->snapLR = 1;
                    layer->update();
                    break;
                }
                auto eleRight = layer->x() + layer->width();
                if(fabs(dstHor - eleRight) < SnapSpace) {
                    dstHor = eleRight;
                    snapLR = 1;
                    layer->snapLR = 2;
                    layer->update();
                    break;
                }
            }
            geo.setLeft(dstHor);
        } else if(mFrmSec==Qt::TopSection) {
            dstVer = qMin(dstVer, geo.bottom() - HandleSize);
            if(dstVer > 8) for(Layer *layer : gEditView->layers) if(layer!=this) {//上下
                if(fabs(dstVer - layer->y()) < SnapSpace) {
                    dstVer = layer->y();
                    snapTB = 1;
                    layer->snapTB = 1;
                    layer->update();
                    break;
                }
                auto eleBtm = layer->y() + layer->height();
                if(fabs(dstVer - eleBtm) < SnapSpace) {
                    dstVer = eleBtm;
                    snapTB = 1;
                    layer->snapTB = 2;
                    layer->update();
                    break;
                }
            }
            geo.setTop(dstVer);
        } else if(mFrmSec==Qt::TopLeftSection) {
            dstHor = qMin(dstHor, geo.right() - HandleSize);
            dstVer = qMin(dstVer, geo.bottom() - HandleSize);
            geo.setLeft(dstHor);
            geo.setTop(dstVer);
        } else if(mFrmSec==Qt::TopRightSection) {
            dstHor = qMax(dstHor, geo.x() + HandleSize);
            dstVer = qMin(dstVer, geo.bottom() - HandleSize);
            geo.setRight(dstHor);
            geo.setTop(dstVer);
        } else if(mFrmSec==Qt::BottomLeftSection) {
            dstHor = qMin(dstHor, geo.right() - HandleSize);
            dstVer = qMax(dstVer, geo.y() + HandleSize);
            geo.setLeft(dstHor);
            geo.setBottom(dstVer);
        }
        setGeometry(geo.toRect());
        posChanged = true;
        sizeChanged = true;
    }
    if(posChanged) sPos = (pos()-gOrigin) / gScale;
    if(sizeChanged) sSize = size() / gScale;
    if(item) {
        view->setSceneRect({sPos, sSize});
        if(posChanged) {
            gOutPanel->edX->blockSignals(true);
            gOutPanel->edY->blockSignals(true);
            gOutPanel->edX->setValue(sPos.x());
            gOutPanel->edY->setValue(sPos.y());
            gOutPanel->edX->blockSignals(false);
            gOutPanel->edY->blockSignals(false);
        }
        if(sizeChanged) {
            view->resize(sSize);
            gOutPanel->edW->blockSignals(true);
            gOutPanel->edH->blockSignals(true);
            gOutPanel->edW->setValue(sSize.width());
            gOutPanel->edH->setValue(sSize.height());
            gOutPanel->edW->blockSignals(false);
            gOutPanel->edH->blockSignals(false);
            item->setText("size"**gOutPanel->tree, QString("%1×%2").arg(sSize.width()).arg(sSize.height()));
        }
    } else {
        auto cell = (Cell*) gTable->data(rowIdx, gPlayinC).toULongLong();
        if(cell) {
            if(posChanged) cell->wgt->setPos(sPos);
            if(sizeChanged) {
                if(cell->type=='V') {
                    ((QGraphicsVideoItem*) cell->wgt)->setSize(sSize);
                } else if(cell->type=='I') {
                    ((ImgItem*) cell->wgt)->size = sSize;
                }
            }
        }
    }
}
void Layer::leaveEvent(QEvent *) {
    setFrmSecIfNeed(Qt::NoSection, Qt::ArrowCursor);
    mPressRel.setX(FLT_MAX);
}

void Layer::setFrmSec(const QPointF &pos) {
    if(hdlLT.contains(pos))      setFrmSecIfNeed(Qt::TopLeftSection, Qt::SizeFDiagCursor);
    else if(hdlT.contains(pos))  setFrmSecIfNeed(Qt::TopSection, Qt::SizeVerCursor);
    else if(hdlRT.contains(pos)) setFrmSecIfNeed(Qt::TopRightSection, Qt::SizeBDiagCursor);
    else if(hdlL.contains(pos))  setFrmSecIfNeed(Qt::LeftSection, Qt::SizeHorCursor);
    else if(hdlR.contains(pos))  setFrmSecIfNeed(Qt::RightSection, Qt::SizeHorCursor);
    else if(hdlLB.contains(pos)) setFrmSecIfNeed(Qt::BottomLeftSection, Qt::SizeBDiagCursor);
    else if(hdlB.contains(pos))  setFrmSecIfNeed(Qt::BottomSection, Qt::SizeVerCursor);
    else if(hdlRB.contains(pos)) setFrmSecIfNeed(Qt::BottomRightSection, Qt::SizeFDiagCursor);
    else if(pos.x()>=0 && pos.x()<=width() && pos.y()>=0 && pos.y()<=height()) setFrmSecIfNeed(Qt::TitleBarArea, Qt::SizeAllCursor);
    else setFrmSecIfNeed(Qt::NoSection, Qt::ArrowCursor);
}
void Layer::setFrmSecIfNeed(Qt::WindowFrameSection frmSec, Qt::CursorShape cursor) {
    if(mFrmSec==frmSec) return;
    mFrmSec = frmSec;
    if(cursor==Qt::ArrowCursor) unsetCursor();
    else setCursor(cursor);
}

void Layer::clearSnap() {
    if(snapLR==0 && snapTB==0) return;
    snapLR = snapTB = 0;
    update();
}

OutputView::OutputView(QWidget *parent) : QGraphicsView(parent) {
    auto format = QSurfaceFormat::defaultFormat();
    format.setSwapBehavior(QSurfaceFormat::SingleBuffer);
    format.setRenderableType(QSurfaceFormat::OpenGL);
    auto glWgt = new QOpenGLWidget;
    glWgt->setFormat(format);

    setViewport(glWgt);
    setWindowFlag(Qt::FramelessWindowHint);
    setAttribute(Qt::WA_AlwaysStackOnTop);
    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    setBackgroundBrush(Qt::black);
    setAlignment(Qt::AlignTop|Qt::AlignLeft);
    setTransformationAnchor(QGraphicsView::NoAnchor);
    setInteractive(false);
    setScene(gScene);
}
void OutputView::mousePressEvent(QMouseEvent *e) {
    QWidget::mousePressEvent(e);
    if(e->button() != Qt::LeftButton) return;
    auto mousePos = e->globalPosition();
    auto elePos = pos();
    mPressRel = elePos - mousePos;
}

void OutputView::mouseReleaseEvent(QMouseEvent *event) {
    QWidget::mouseReleaseEvent(event);
    if(Qt::LeftButton == event->button()) {
        mPressRel.setX(FLT_MAX);
    }
    setAttribute(Qt::WA_AlwaysStackOnTop);
}
#define SnapSpace 6
void OutputView::mouseMoveEvent(QMouseEvent *e) {
    if(! (e->buttons() & Qt::LeftButton)) return;
    if(mPressRel.x()>=FLT_MAX) return;
    auto mousePos = e->globalPosition();
    auto dstHor = mPressRel.x() + mousePos.x();
    auto dstVer = mPressRel.y() + mousePos.y();
    // if(snapLR==0) for(auto layer : gEditView->layers) if(layer!=this) {//左右
    //     if(fabs(dstHor - layer->x()) < SnapSpace) {
    //         dstHor = layer->x();
    //         snapLR = 1;
    //         layer->snapLR = 1;
    //         layer->update();
    //         break;
    //     }
    //     auto eleRight = layer->x() + layer->width();
    //     if(fabs(dstHor - eleRight) < SnapSpace) {
    //         dstHor = eleRight;
    //         snapLR = 1;
    //         layer->snapLR = 2;
    //         layer->update();
    //         break;
    //     }
    //     auto right = dstHor + width();
    //     if(fabs(right - layer->x()) < SnapSpace && layer->x() - width() >= 0) {
    //         dstHor = layer->x() - width();
    //         snapLR = 2;
    //         layer->snapLR = 1;
    //         layer->update();
    //         break;
    //     }
    //     if(fabs(right - eleRight) < SnapSpace && eleRight - width() >= 0) {
    //         dstHor = eleRight - width();
    //         snapLR = 2;
    //         layer->snapLR = 2;
    //         layer->update();
    //         break;
    //     }
    // }
    // if(snapTB==0) for(auto layer : gEditView->layers) if(layer!=this) {//上下
    //     if(fabs(dstVer-layer->y()) < SnapSpace) {
    //         dstVer = layer->y();
    //         snapTB = 1;
    //         layer->snapTB = 1;
    //         layer->update();
    //         break;
    //     }
    //     auto eleBtm = layer->y() + layer->height();
    //     if(fabs(dstVer - eleBtm) < SnapSpace) {
    //         dstVer = eleBtm;
    //         snapTB = 1;
    //         layer->snapTB = 2;
    //         layer->update();
    //         break;
    //     }
    //     auto btm = dstVer + height();
    //     if(fabs(btm - layer->y()) < SnapSpace && layer->y() - height() >= 0) {
    //         dstVer = layer->y() - height();
    //         snapTB = 2;
    //         layer->snapTB = 1;
    //         layer->update();
    //         break;
    //     }
    //     if(fabs(btm - eleBtm) < SnapSpace && eleBtm - height() >= 0) {
    //         dstVer = eleBtm - height();
    //         snapTB = 2;
    //         layer->snapTB = 2;
    //         layer->update();
    //         break;
    //     }
    // }
    move(dstHor, dstVer);
}
void OutputView::leaveEvent(QEvent *) {
    //setFrmSecIfNeed(Qt::NoSection, Qt::ArrowCursor);
    mPressRel.setX(FLT_MAX);
}