#!/usr/bin/env python
# --!-- coding: utf8 --!--
from PyQt5.QtCore import QSize, Qt, QRect, QPoint, QPointF
from PyQt5.QtGui import QMouseEvent, QFont, QPalette, QRegion, QFontMetrics, QColor, QIcon, QPolygonF
from PyQt5.QtWidgets import QStyledItemDelegate, QLineEdit, QPlainTextEdit, QFrame, qApp, QStyle

from manuskript import settings
from manuskript.enums import Outline
from manuskript.functions import colorifyPixmap
from manuskript.functions import mainWindow
from manuskript.functions import mixColors
from manuskript.functions import outlineItemColors
from manuskript.ui import style as S


class corkDelegate(QStyledItemDelegate):
    def __init__(self, parent=None):
        QStyledItemDelegate.__init__(self, parent)
        self.factor = settings.corkSizeFactor / 100.
        self.lastPos = None
        self.editing = None
        self.margin = 5

        self.bgColors = {}

    def newStyle(self):
        return settings.corkStyle == "new"

    def setCorkSizeFactor(self, v):
        self.factor = v / 100.

    def sizeHint(self, option, index):
        if self.newStyle():
            defaultSize = QSize(300, 210)
        else:
            defaultSize = QSize(300, 200)
        return defaultSize * self.factor

    def editorEvent(self, event, model, option, index):
        # We catch the mouse position in the widget to know which part to edit
        if type(event) == QMouseEvent:
            self.lastPos = event.pos()  # - option.rect.topLeft()
        return QStyledItemDelegate.editorEvent(self, event, model, option, index)

    def createEditor(self, parent, option, index):
        # When the user performs a global search and selects an Outline result (title or summary), the
        # associated chapter is selected in cork view, triggering a call to this method with the results
        # list widget set in self.sender(). In this case we store the searched column so we know which
        # editor should be created.
        searchedColumn = None
        if self.sender() is not None and self.sender().objectName() == 'result' and self.sender().currentItem():
            searchedColumn = self.sender().currentItem().data(Qt.UserRole).column()

        self.updateRects(option, index)

        bgColor = self.bgColors.get(index, "white")

        if searchedColumn == Outline.summarySentence or (self.lastPos is not None and self.mainLineRect.contains(self.lastPos)):
            # One line summary
            self.editing = Outline.summarySentence
            edt = QLineEdit(parent)
            edt.setFocusPolicy(Qt.StrongFocus)
            edt.setFrame(False)
            f = QFont(option.font)
            if self.newStyle():
                f.setBold(True)
            else:
                f.setItalic(True)
                edt.setAlignment(Qt.AlignCenter)
            edt.setPlaceholderText(self.tr("One line summary"))
            edt.setFont(f)
            edt.setStyleSheet("background: {}; color: black;".format(bgColor))
            return edt

        elif searchedColumn == Outline.title or (self.lastPos is not None and self.titleRect.contains(self.lastPos)):
            # Title
            self.editing = Outline.title
            edt = QLineEdit(parent)
            edt.setFocusPolicy(Qt.StrongFocus)
            edt.setFrame(False)
            f = QFont(option.font)
            if self.newStyle():
                f.setPointSize(f.pointSize() + 4)
            else:
                edt.setAlignment(Qt.AlignCenter)
            f.setBold(True)
            edt.setFont(f)
            edt.setStyleSheet("background: {}; color: black;".format(bgColor))
            # edt.setGeometry(self.titleRect)
            return edt

        else:  # self.mainTextRect.contains(self.lastPos):
            # Summary
            self.editing = Outline.summaryFull
            edt = QPlainTextEdit(parent)
            edt.setFocusPolicy(Qt.StrongFocus)
            edt.setFrameShape(QFrame.NoFrame)
            try:
                # QPlainTextEdit.setPlaceholderText was introduced in Qt 5.3
                edt.setPlaceholderText(self.tr("Full summary"))
            except AttributeError:
                pass
            edt.setStyleSheet("background: {}; color: black;".format(bgColor))
            return edt

    def updateEditorGeometry(self, editor, option, index):

        if self.editing == Outline.summarySentence:
            # One line summary
            editor.setGeometry(self.mainLineRect)

        elif self.editing == Outline.title:
            # Title
            editor.setGeometry(self.titleRect)

        elif self.editing == Outline.summaryFull:
            # Summary
            editor.setGeometry(self.mainTextRect)

    def setEditorData(self, editor, index):
        item = index.internalPointer()

        if self.editing == Outline.summarySentence:
            # One line summary
            editor.setText(item.data(Outline.summarySentence))

        elif self.editing == Outline.title:
            # Title
            editor.setText(index.data())

        elif self.editing == Outline.summaryFull:
            # Summary
            editor.setPlainText(item.data(Outline.summaryFull))

    def setModelData(self, editor, model, index):

        if self.editing == Outline.summarySentence:
            # One line summary
            model.setData(index.sibling(index.row(), Outline.summarySentence), editor.text())

        elif self.editing == Outline.title:
            # Title
            model.setData(index, editor.text(), Outline.title)

        elif self.editing == Outline.summaryFull:
            # Summary
            model.setData(index.sibling(index.row(), Outline.summaryFull), editor.toPlainText())

    def updateRects(self, option, index):
        if self.newStyle():
            self.updateRects_v2(option, index)
        else:
            self.updateRects_v1(option, index)

    def updateRects_v2(self, option, index):
        margin = self.margin * 2
        iconSize = max(24 * self.factor, 18)
        item = index.internalPointer()
        fm = QFontMetrics(option.font)
        h = fm.lineSpacing()

        self.itemRect = option.rect.adjusted(margin, margin, -margin, -margin)

        top = 15 * self.factor
        self.topRect = QRect(self.itemRect)
        self.topRect.setHeight(top)

        self.cardRect = QRect(self.itemRect.topLeft() + QPoint(0, top),
                         self.itemRect.bottomRight())
        self.iconRect = QRect(self.cardRect.topLeft() + QPoint(margin, margin),
                              QSize(iconSize, iconSize))
        self.labelRect = QRect(self.cardRect.topRight() - QPoint(margin + self.factor * 18, 1),
                               self.cardRect.topRight() + QPoint(- margin - self.factor * 4, self.factor * 24))
        self.titleRect = QRect(self.iconRect.topRight() + QPoint(margin, 0),
                               self.labelRect.bottomLeft() - QPoint(margin, margin))
        self.titleRect.setBottom(self.iconRect.bottom())
        self.mainRect = QRect(self.iconRect.bottomLeft() + QPoint(0, margin),
                              self.cardRect.bottomRight() - QPoint(margin, 2*margin))
        self.mainRect.setLeft(self.titleRect.left())
        self.mainLineRect = QRect(self.mainRect.topLeft(),
                                  self.mainRect.topRight() + QPoint(0, h))
        self.mainTextRect = QRect(self.mainLineRect.bottomLeft() + QPoint(0, margin),
                                  self.mainRect.bottomRight())
        if not item.data(Outline.summarySentence):
            self.mainTextRect.setTopLeft(self.mainLineRect.topLeft())

    def updateRects_v1(self, option, index):
        margin = self.margin
        iconSize = max(16 * self.factor, 12)
        item = index.internalPointer()
        self.itemRect = option.rect.adjusted(margin, margin, -margin, -margin)
        self.iconRect = QRect(self.itemRect.topLeft() + QPoint(margin, margin), QSize(iconSize, iconSize))
        self.labelRect = QRect(self.itemRect.topRight() - QPoint(iconSize + margin, 0),
                               self.itemRect.topRight() + QPoint(0, iconSize + 2 * margin))
        self.titleRect = QRect(self.iconRect.topRight() + QPoint(margin, 0),
                               self.labelRect.bottomLeft() - QPoint(margin, margin))
        self.bottomRect = QRect(QPoint(self.itemRect.x(), self.iconRect.bottom() + margin),
                                QPoint(self.itemRect.right(), self.itemRect.bottom()))
        self.topRect = QRect(self.itemRect.topLeft(), self.bottomRect.topRight())
        self.mainRect = self.bottomRect.adjusted(margin, margin, -margin, -margin)
        self.mainLineRect = QRect(self.mainRect.topLeft(),
                                  self.mainRect.topRight() + QPoint(0, iconSize))
        self.mainTextRect = QRect(self.mainLineRect.bottomLeft() + QPoint(0, margin),
                                  self.mainRect.bottomRight())
        if not item.data(Outline.summarySentence):
            self.mainTextRect.setTopLeft(self.mainLineRect.topLeft())
        if item.data(Outline.label) in ["", "0", 0]:
            self.titleRect.setBottomRight(self.labelRect.bottomRight() - QPoint(self.margin, self.margin))

    def paint(self, p, option, index):
        if self.newStyle():
            self.paint_v2(p, option, index)
        else:
            self.paint_v1(p, option, index)

    def paint_v2(self, p, option, index):
        # QStyledItemDelegate.paint(self, p, option, index)
        if not index.isValid():
            return

        item = index.internalPointer()
        self.updateRects(option, index)
        colors = outlineItemColors(item)

        style = qApp.style()

        def _rotate(angle, rect=self.mainRect):
            p.translate(rect.center())
            p.rotate(angle)
            p.translate(-rect.center())

        def drawRect(r):
            p.save()
            p.setBrush(Qt.gray)
            p.drawRect(r)
            p.restore()

        # Draw background
        cg = QPalette.ColorGroup(QPalette.Normal if option.state & QStyle.State_Enabled else QPalette.Disabled)
        if cg == QPalette.Normal and not option.state & QStyle.State_Active:
            cg = QPalette.Inactive

            # Selection
        if option.state & QStyle.State_Selected:
            p.save()
            p.setBrush(option.palette.brush(cg, QPalette.Highlight))
            p.setPen(Qt.NoPen)
            #p.drawRoundedRect(option.rect, 12, 12)
            p.drawRect(option.rect)
            p.restore()

            # Background
        p.save()
        if settings.viewSettings["Cork"]["Background"] != "Nothing":
            c = colors[settings.viewSettings["Cork"]["Background"]]
            if c == QColor(Qt.transparent):
                c = QColor(Qt.white)
            col = mixColors(c, QColor(Qt.white), .2)
            backgroundColor = col
            p.setBrush(col)
        else:
            p.setBrush(Qt.white)
            backgroundColor = QColor(Qt.white)

            # Cache background color
        self.bgColors[index] = backgroundColor.name()

        p.setPen(Qt.NoPen)
        p.drawRect(self.cardRect)
        if item.isFolder():
            itemPoly = QPolygonF([
                self.topRect.topLeft(),
                self.topRect.topLeft() + QPoint(self.topRect.width() * .35, 0),
                self.cardRect.topLeft() + QPoint(self.topRect.width() * .45, 0),
                self.cardRect.topRight(),
                self.cardRect.bottomRight(),
                self.cardRect.bottomLeft()
            ])
            p.drawPolygon(itemPoly)
        p.restore()

        # Label color
        if settings.viewSettings["Cork"]["Corner"] != "Nothing":
            p.save()
            color = colors[settings.viewSettings["Cork"]["Corner"]]
            p.setPen(Qt.NoPen)
            p.setBrush(color)
            p.drawRect(self.labelRect)
            w = self.labelRect.width()
            poly = QPolygonF([
                self.labelRect.bottomLeft() + QPointF(0, 1),
                self.labelRect.bottomLeft() + QPointF(0, w / 2),
                self.labelRect.bottomLeft() + QPointF(w / 2, 1),
                self.labelRect.bottomRight() + QPointF(1, w / 2),
                self.labelRect.bottomRight() + QPointF(1, 1),
            ])

            p.drawPolygon(poly)
            p.restore()

        if settings.viewSettings["Cork"]["Corner"] == "Nothing" or \
           color == Qt.transparent:
            # No corner, so title can be full width
            self.titleRect.setRight(self.mainRect.right())

        # Draw the icon
        iconRect = self.iconRect
        mode = QIcon.Normal
        if not option.state & style.State_Enabled:
            mode = QIcon.Disabled
        elif option.state & style.State_Selected:
            mode = QIcon.Selected
        # index.data(Qt.DecorationRole).paint(p, iconRect, option.decorationAlignment, mode)
        icon = index.data(Qt.DecorationRole).pixmap(iconRect.size())
        if settings.viewSettings["Cork"]["Icon"] != "Nothing":
            color = colors[settings.viewSettings["Cork"]["Icon"]]
            colorifyPixmap(icon, color)
        QIcon(icon).paint(p, iconRect, option.decorationAlignment, mode)

        # Draw title
        p.save()
        text = index.data()

        if text:
            p.setPen(Qt.black)
            textColor = QColor(Qt.black)
            if settings.viewSettings["Cork"]["Text"] != "Nothing":
                col = colors[settings.viewSettings["Cork"]["Text"]]
                if col == Qt.transparent:
                    col = Qt.black

                # If title setting is compile, we have to hack the color
                # Or we won't see anything in some themes
                if settings.viewSettings["Cork"]["Text"] == "Compile":
                    if item.compile() in [0, "0"]:
                        col = mixColors(QColor(Qt.black), backgroundColor)
                    else:
                        col = Qt.black
                textColor = col
                p.setPen(col)
            f = QFont(option.font)
            f.setPointSize(f.pointSize() + 4)
            f.setBold(True)
            p.setFont(f)
            fm = QFontMetrics(f)
            elidedText = fm.elidedText(text, Qt.ElideRight, self.titleRect.width())
            p.drawText(self.titleRect, Qt.AlignLeft | Qt.AlignVCenter, elidedText)
        p.restore()

            # One line summary background
        lineSummary = item.data(Outline.summarySentence)
        fullSummary = item.data(Outline.summaryFull)

            # Border
        if settings.viewSettings["Cork"]["Border"] != "Nothing":
            p.save()
            p.setBrush(Qt.NoBrush)
            pen = p.pen()
            pen.setWidth(2)
            col = colors[settings.viewSettings["Cork"]["Border"]]
            pen.setColor(col)
            p.setPen(pen)
            if item.isFolder():
                p.drawPolygon(itemPoly)
            else:
                p.drawRect(self.cardRect)
            p.restore()

        # Draw status
        status = item.data(Outline.status)
        if status:
            it = mainWindow().mdlStatus.item(int(status), 0)
            if it != None:
                p.save()
                p.setClipRegion(QRegion(self.cardRect))
                f = p.font()
                f.setPointSize(f.pointSize() + 12)
                f.setBold(True)
                p.setFont(f)
                p.setPen(QColor(Qt.red).lighter(170))
                _rotate(-35, rect=self.cardRect)
                p.drawText(self.cardRect, Qt.AlignCenter, it.text())
                p.restore()

                # Draw Summary
                # One line
        if lineSummary:
            p.save()
            f = QFont(option.font)
            f.setBold(True)
            p.setFont(f)
            p.setPen(textColor)
            fm = QFontMetrics(f)
            elidedText = fm.elidedText(lineSummary, Qt.ElideRight, self.mainLineRect.width())
            p.drawText(self.mainLineRect, Qt.AlignLeft | Qt.AlignVCenter, elidedText)
            p.restore()

            # Full summary
        if fullSummary:
            p.save()
            p.setFont(option.font)
            p.setPen(textColor)
            p.drawText(self.mainTextRect, Qt.TextWordWrap, fullSummary)
            p.restore()

    def paint_v1(self, p, option, index):
        # QStyledItemDelegate.paint(self, p, option, index)
        if not index.isValid():
            return

        item = index.internalPointer()
        self.updateRects(option, index)
        colors = outlineItemColors(item)

        style = qApp.style()

        def _rotate(angle):
            p.translate(self.mainRect.center())
            p.rotate(angle)
            p.translate(-self.mainRect.center())

        # Draw background
        cg = QPalette.ColorGroup(QPalette.Normal if option.state & QStyle.State_Enabled else QPalette.Disabled)
        if cg == QPalette.Normal and not option.state & QStyle.State_Active:
            cg = QPalette.Inactive

            # Selection
        if option.state & QStyle.State_Selected:
            p.save()
            p.setBrush(option.palette.brush(cg, QPalette.Highlight))
            p.setPen(Qt.NoPen)
            p.drawRoundedRect(option.rect, 12, 12)
            p.restore()

            # Stack
        if item.isFolder() and item.childCount() > 0:
            p.save()
            p.setBrush(Qt.white)
            for i in reversed(range(3)):
                p.drawRoundedRect(self.itemRect.adjusted(2 * i, 2 * i, -2 * i, 2 * i), 10, 10)

            p.restore()

            # Background
        itemRect = self.itemRect
        p.save()
        if settings.viewSettings["Cork"]["Background"] != "Nothing":
            c = colors[settings.viewSettings["Cork"]["Background"]]
            col = mixColors(c, QColor(Qt.white), .2)
            p.setBrush(col)
        else:
            p.setBrush(Qt.white)
        pen = p.pen()
        pen.setWidth(2)
        p.setPen(pen)
        p.drawRoundedRect(itemRect, 10, 10)
        p.restore()

        # Title bar
        topRect = self.topRect
        p.save()
        if item.isFolder():
            color = QColor(Qt.darkGreen)
        else:
            color = QColor(Qt.blue).lighter(175)
        p.setPen(Qt.NoPen)
        p.setBrush(color)
        p.setClipRegion(QRegion(topRect))
        p.drawRoundedRect(itemRect, 10, 10)
        # p.drawRect(topRect)
        p.restore()

        # Label color
        if settings.viewSettings["Cork"]["Corner"] != "Nothing":
            p.save()
            color = colors[settings.viewSettings["Cork"]["Corner"]]
            p.setPen(Qt.NoPen)
            p.setBrush(color)
            p.setClipRegion(QRegion(self.labelRect))
            p.drawRoundedRect(itemRect, 10, 10)
            # p.drawRect(topRect)
            p.restore()
            if color != Qt.transparent:
                p.drawLine(self.labelRect.topLeft(), self.labelRect.bottomLeft())

            # One line summary background
        lineSummary = item.data(Outline.summarySentence)
        fullSummary = item.data(Outline.summaryFull)
        if lineSummary or not fullSummary:
            m = self.margin
            r = self.mainLineRect.adjusted(-m, -m, m, m / 2)
            p.save()
            p.setPen(Qt.NoPen)
            p.setBrush(QColor("#EEE"))
            p.drawRect(r)
            p.restore()

            # Border
        p.save()
        p.setBrush(Qt.NoBrush)
        pen = p.pen()
        pen.setWidth(2)
        if settings.viewSettings["Cork"]["Border"] != "Nothing":
            col = colors[settings.viewSettings["Cork"]["Border"]]
            if col == Qt.transparent:
                col = Qt.black
            pen.setColor(col)
        p.setPen(pen)
        p.drawRoundedRect(itemRect, 10, 10)
        p.restore()

        # Draw the icon
        iconRect = self.iconRect
        mode = QIcon.Normal
        if not option.state & style.State_Enabled:
            mode = QIcon.Disabled
        elif option.state & style.State_Selected:
            mode = QIcon.Selected
        # index.data(Qt.DecorationRole).paint(p, iconRect, option.decorationAlignment, mode)
        icon = index.data(Qt.DecorationRole).pixmap(iconRect.size())
        if settings.viewSettings["Cork"]["Icon"] != "Nothing":
            color = colors[settings.viewSettings["Cork"]["Icon"]]
            colorifyPixmap(icon, color)
        QIcon(icon).paint(p, iconRect, option.decorationAlignment, mode)

        # Draw title
        p.save()
        text = index.data()
        titleRect = self.titleRect
        if text:
            if settings.viewSettings["Cork"]["Text"] != "Nothing":
                col = colors[settings.viewSettings["Cork"]["Text"]]
                if col == Qt.transparent:
                    col = Qt.black
                p.setPen(col)
            f = QFont(option.font)
            # f.setPointSize(f.pointSize() + 1)
            f.setBold(True)
            p.setFont(f)
            fm = QFontMetrics(f)
            elidedText = fm.elidedText(text, Qt.ElideRight, titleRect.width())
            p.drawText(titleRect, Qt.AlignCenter, elidedText)
        p.restore()

        # Draw the line
        bottomRect = self.bottomRect
        p.save()
        # p.drawLine(itemRect.x(), iconRect.bottom() + margin,
        # itemRect.right(), iconRect.bottom() + margin)
        p.drawLine(bottomRect.topLeft(), bottomRect.topRight())
        p.restore()

        # Lines
        if True:
            p.save()
            p.setPen(QColor("#EEE"))
            fm = QFontMetrics(option.font)
            h = fm.lineSpacing()
            l = self.mainTextRect.topLeft() + QPoint(0, h)
            while self.mainTextRect.contains(l):
                p.drawLine(l, QPoint(self.mainTextRect.right(), l.y()))
                l.setY(l.y() + h)
            p.restore()

        # Draw status
        mainRect = self.mainRect
        status = item.data(Outline.status)
        if status:
            it = mainWindow().mdlStatus.item(int(status), 0)
            if it != None:
                p.save()
                p.setClipRegion(QRegion(mainRect))
                f = p.font()
                f.setPointSize(f.pointSize() + 12)
                f.setBold(True)
                p.setFont(f)
                p.setPen(QColor(Qt.red).lighter(175))
                _rotate(-35)
                p.drawText(mainRect, Qt.AlignCenter, it.text())
                p.restore()

                # Draw Summary
                # One line
        if lineSummary:
            p.save()
            f = QFont(option.font)
            f.setItalic(True)
            p.setFont(f)
            fm = QFontMetrics(f)
            elidedText = fm.elidedText(lineSummary, Qt.ElideRight, self.mainLineRect.width())
            p.drawText(self.mainLineRect, Qt.AlignCenter, elidedText)
            p.restore()

            # Full summary
        if fullSummary:
            p.setFont(option.font)
            p.drawText(self.mainTextRect, Qt.TextWordWrap, fullSummary)

            # Debug
            # for r in [self.itemRect, self.iconRect, self.titleRect, self.bottomRect, self.mainLineRect, self.mainTextRect]:
            # p.drawRect(r)
