from __future__ import annotations

from pathlib import Path

from PyQt6.QtCore import QPointF, QRectF, Qt
from PyQt6.QtGui import (
    QColor,
    QIcon,
    QLinearGradient,
    QPainter,
    QPainterPath,
    QPen,
    QPixmap,
    QPolygonF,
)

from .models import MediaKind

BG = "#0A0D12"
CARD = "#11161E"
ACCENT = "#D7FF3F"
TEXT = "#E8EDF4"
MUTED = "#8795A7"
GREEN = "#8FE3A6"
RED = "#FF7D7D"
AMBER = "#F6C96B"

_ASSET_DIR = Path(__file__).resolve().parent / "assets"


def _asset_url(name: str) -> str:
    return (_ASSET_DIR / name).as_posix()


def stylesheet() -> str:
    chevron = _asset_url("chevron-down.svg")
    check = _asset_url("check.svg")
    qss = """
QWidget {
    color: #E8EDF4;
    font-family: "Segoe UI Variable Text", "Segoe UI", "Inter", sans-serif;
    font-size: 13px;
}
QMainWindow, QWidget#root {
    background-color: #0A0D12;
}
QLabel {
    background: transparent;
}
QFrame#queueCard, QFrame#settingsCard {
    background-color: #11161E;
    border: 1px solid #202A35;
    border-radius: 16px;
}
QFrame#queueCard[dragActive="true"] {
    border: 1px solid #D7FF3F;
    background-color: #121A17;
}
QFrame#divider {
    background-color: #1E2832;
    border: none;
    min-height: 1px;
    max-height: 1px;
}
QFrame#dropZone {
    background-color: #0D1219;
    border: 1px dashed #2B3745;
    border-radius: 13px;
}
QFrame#dropZone[dragActive="true"] {
    background-color: #111B17;
    border: 1px dashed #D7FF3F;
}

QLabel#appTitle {
    font-size: 22px;
    font-weight: 700;
    color: #F5F8FC;
}
QLabel#appSubtitle {
    color: #8491A2;
    font-size: 12px;
}
QLabel#cardTitle {
    font-size: 16px;
    font-weight: 700;
    color: #F1F5FA;
}
QLabel#sectionHintTitle {
    font-size: 15px;
    font-weight: 700;
    color: #F1F5FA;
}
QLabel#badge {
    background-color: #1C2631;
    border: 1px solid #293543;
    border-radius: 9px;
    color: #9EABBA;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 8px;
}
QLabel#privacyChip {
    background-color: #142018;
    border: 1px solid #27402E;
    border-radius: 11px;
    color: #91D8A4;
    font-size: 11px;
    font-weight: 600;
    padding: 5px 10px;
}
QLabel#fieldLabel {
    color: #A8B4C3;
    font-size: 12px;
    font-weight: 600;
}
QLabel#hintLabel {
    color: #7B8898;
    font-size: 11px;
}
QLabel#qualityValue {
    color: #D7FF3F;
    font-size: 12px;
    font-weight: 700;
}
QLabel#emptyTitle {
    font-size: 17px;
    font-weight: 700;
    color: #EDF2F8;
}
QLabel#emptyText {
    color: #778595;
    font-size: 12px;
}
QLabel#statsLabel {
    color: #A9B5C4;
    font-size: 12px;
}
QLabel#outputLabel {
    color: #6F7D8E;
    font-size: 10px;
    font-weight: 700;
}
QLabel#percentLabel {
    color: #D7FF3F;
    font-size: 11px;
    font-weight: 700;
    min-width: 32px;
}
QLabel#footerText {
    color: #758294;
    font-size: 11px;
}
QLabel#engineLabel {
    color: #768496;
    font-size: 11px;
}
QLabel#successText {
    color: #8FE3A6;
    font-size: 11px;
}

QPushButton {
    background-color: #1A232D;
    border: 1px solid #2A3745;
    border-radius: 8px;
    padding: 7px 12px;
    color: #D9E1EA;
    font-size: 12px;
    font-weight: 600;
}
QPushButton:hover {
    background-color: #202B37;
    border-color: #3A4A5C;
}
QPushButton:pressed {
    background-color: #18212A;
}
QPushButton:disabled {
    background-color: #141A21;
    border-color: #202831;
    color: #586473;
}
QPushButton#ghostButton {
    background-color: transparent;
    border: 1px solid transparent;
    color: #8593A4;
    padding: 7px 9px;
}
QPushButton#ghostButton:hover {
    background-color: #19222C;
    color: #D9E1EA;
}
QPushButton#accentSmall {
    background-color: #D7FF3F;
    border: 1px solid #D7FF3F;
    border-radius: 9px;
    color: #101500;
    padding: 8px 18px;
    font-weight: 700;
}
QPushButton#accentSmall:hover {
    background-color: #E4FF70;
    border-color: #E4FF70;
}
QPushButton#primaryAction {
    background-color: #D7FF3F;
    border: 1px solid #D7FF3F;
    border-radius: 10px;
    color: #0D1203;
    font-size: 13px;
    font-weight: 700;
    padding: 11px 18px;
    min-height: 22px;
}
QPushButton#primaryAction:hover {
    background-color: #E5FF77;
    border-color: #E5FF77;
}
QPushButton#primaryAction:pressed {
    background-color: #C9F42F;
}
QPushButton#primaryAction:disabled {
    background-color: #222B20;
    border-color: #293523;
    color: #65705A;
}
QPushButton#cancelButton {
    background-color: transparent;
    border: 1px solid #4A2A2E;
    color: #E79A9A;
    border-radius: 10px;
    padding: 11px 16px;
    font-weight: 600;
}
QPushButton#cancelButton:hover {
    background-color: #221719;
    border-color: #784047;
}

QToolButton#destButton {
    background-color: #0E141B;
    border: 1px solid #25303C;
    border-radius: 8px;
    padding: 7px 26px 7px 10px;
    color: #B7C3D1;
    font-size: 12px;
    text-align: left;
}
QToolButton#destButton:hover {
    border-color: #3A4B5D;
    background-color: #121A23;
}
QToolButton#destButton::menu-indicator {
    image: url("__CHEVRON__");
    subcontrol-origin: padding;
    subcontrol-position: center right;
    width: 14px;
    height: 14px;
    right: 8px;
}

QTabWidget#settingsTabs::pane {
    border: none;
    margin-top: 4px;
}
QTabWidget#settingsTabs QTabBar::tab {
    background-color: #0E141B;
    border: 1px solid #202A35;
    border-radius: 8px;
    color: #8694A5;
    padding: 7px 17px;
    margin-right: 5px;
    font-size: 12px;
    font-weight: 600;
    min-width: 62px;
}
QTabWidget#settingsTabs QTabBar::tab:hover {
    color: #DCE4ED;
    border-color: #334253;
}
QTabWidget#settingsTabs QTabBar::tab:selected {
    background-color: #D7FF3F;
    border-color: #D7FF3F;
    color: #101500;
    font-weight: 700;
}
QScrollArea#tabScroll {
    border: none;
    background-color: transparent;
}
QScrollArea#tabScroll > QWidget > QWidget {
    background-color: transparent;
}
QWidget#tabContent {
    background-color: transparent;
}

QComboBox, QSpinBox {
    background-color: #0D131A;
    border: 1px solid #25303D;
    border-radius: 8px;
    padding: 7px 10px;
    color: #DDE5EE;
    min-height: 20px;
    selection-background-color: #293644;
}
QComboBox:hover, QSpinBox:hover {
    border-color: #38495B;
}
QComboBox:focus, QSpinBox:focus {
    border-color: #D7FF3F;
}
QComboBox:disabled, QSpinBox:disabled {
    color: #5E6978;
    background-color: #10151C;
    border-color: #1C242D;
}
QComboBox::drop-down {
    subcontrol-origin: padding;
    subcontrol-position: top right;
    width: 26px;
    border: none;
    background: transparent;
}
QComboBox::down-arrow {
    image: url("__CHEVRON__");
    width: 14px;
    height: 14px;
}
QComboBox QAbstractItemView {
    background-color: #141B24;
    border: 1px solid #2A3745;
    border-radius: 8px;
    padding: 4px;
    color: #DDE5EE;
    selection-background-color: #24313E;
    selection-color: #F4F8FC;
    outline: 0;
}

QSlider::groove:horizontal {
    height: 4px;
    background-color: #26313D;
    border-radius: 2px;
}
QSlider::sub-page:horizontal {
    background-color: #D7FF3F;
    border-radius: 2px;
}
QSlider::handle:horizontal {
    background-color: #F7FFE2;
    border: 3px solid #D7FF3F;
    width: 12px;
    height: 12px;
    margin: -7px 0;
    border-radius: 9px;
}
QSlider::handle:horizontal:hover {
    background-color: #FFFFFF;
    border-color: #E5FF77;
}
QSlider:disabled::sub-page:horizontal {
    background-color: #47533A;
}
QSlider:disabled::handle:horizontal {
    background-color: #87937B;
    border-color: #47533A;
}

QCheckBox {
    color: #AEBAC8;
    font-size: 12px;
    spacing: 9px;
}
QCheckBox::indicator {
    width: 16px;
    height: 16px;
    border: 1px solid #354250;
    border-radius: 4px;
    background-color: #0D131A;
}
QCheckBox::indicator:hover {
    border-color: #526679;
}
QCheckBox::indicator:checked {
    background-color: #D7FF3F;
    border-color: #D7FF3F;
    image: url("__CHECK__");
}

QTreeWidget {
    background-color: transparent;
    border: none;
    outline: 0;
    show-decoration-selected: 1;
    alternate-background-color: transparent;
    selection-background-color: #19222C;
}
QTreeWidget::item {
    border-bottom: 1px solid #1A222B;
    padding: 0px;
    color: #D8E0E9;
}
QTreeWidget::item:hover {
    background-color: #151D26;
}
QTreeWidget::item:selected {
    background-color: #1B2530;
    color: #F2F6FA;
}
QTreeWidget::branch {
    background: transparent;
}
QHeaderView {
    background-color: transparent;
}
QHeaderView::section {
    background-color: transparent;
    border: none;
    border-bottom: 1px solid #202A34;
    color: #768496;
    font-size: 10px;
    font-weight: 700;
    padding: 0px 2px 9px 2px;
}
QHeaderView::section:first {
    padding-left: 8px;
}

QProgressBar {
    background-color: #232C37;
    border: none;
    border-radius: 3px;
    min-height: 6px;
    max-height: 6px;
    text-align: center;
}
QProgressBar::chunk {
    background-color: #D7FF3F;
    border-radius: 3px;
}

QScrollBar:vertical {
    background: transparent;
    width: 8px;
    margin: 2px 0px;
}
QScrollBar::handle:vertical {
    background: #2A3542;
    min-height: 28px;
    border-radius: 4px;
}
QScrollBar::handle:vertical:hover {
    background: #3C4A5A;
}
QScrollBar::add-line:vertical, QScrollBar::sub-line:vertical {
    height: 0px;
}
QScrollBar::add-page:vertical, QScrollBar::sub-page:vertical {
    background: transparent;
}
QScrollBar:horizontal {
    background: transparent;
    height: 8px;
}
QScrollBar::handle:horizontal {
    background: #2A3542;
    min-width: 28px;
    border-radius: 4px;
}

QMenu {
    background-color: #151C25;
    border: 1px solid #2A3745;
    border-radius: 8px;
    padding: 5px;
}
QMenu::item {
    background-color: transparent;
    color: #DCE4ED;
    padding: 7px 24px 7px 12px;
    border-radius: 5px;
}
QMenu::item:selected {
    background-color: #232F3C;
    color: #FFFFFF;
}
QMenu::item:disabled {
    color: #687483;
}
QMenu::separator {
    height: 1px;
    background-color: #27323E;
    margin: 5px 8px;
}

QToolTip {
    background-color: #1A222C;
    color: #E6ECF3;
    border: 1px solid #354250;
    padding: 6px 8px;
}
QMessageBox {
    background-color: #11161E;
}
QMessageBox QLabel {
    color: #E6ECF3;
}
"""
    return qss.replace("__CHEVRON__", chevron).replace("__CHECK__", check)


def make_app_icon() -> QIcon:
    icon = QIcon()
    for size in (16, 24, 32, 48, 64, 128, 256, 512):
        icon.addPixmap(_render_logo(size))
    return icon


def app_logo_pixmap(size: int) -> QPixmap:
    return _render_logo(size)


def _render_logo(size: int) -> QPixmap:
    pixmap = QPixmap(size, size)
    pixmap.fill(Qt.GlobalColor.transparent)
    painter = QPainter(pixmap)
    painter.setRenderHint(QPainter.RenderHint.Antialiasing, True)

    margin = size * 0.045
    rect = QRectF(margin, margin, size - margin * 2, size - margin * 2)
    path = QPainterPath()
    path.addRoundedRect(rect, size * 0.235, size * 0.235)

    gradient = QLinearGradient(rect.topLeft(), rect.bottomRight())
    gradient.setColorAt(0.0, QColor("#E5FF77"))
    gradient.setColorAt(0.55, QColor("#D7FF3F"))
    gradient.setColorAt(1.0, QColor("#B8EA22"))
    painter.fillPath(path, gradient)

    # A soft inner highlight gives the mark a little dimension.
    highlight = QPainterPath()
    highlight.addRoundedRect(QRectF(margin, margin, size - margin * 2, (size - margin * 2) * 0.48), size * 0.22, size * 0.22)
    painter.fillPath(highlight, QColor(255, 255, 255, 18))

    points = [
        (0.575, 0.135),
        (0.245, 0.555),
        (0.465, 0.555),
        (0.405, 0.875),
        (0.765, 0.445),
        (0.535, 0.445),
    ]
    bolt = QPolygonF([QPointF(x * size, y * size) for x, y in points])
    painter.setPen(QPen(QColor("#142000"), max(1.0, size * 0.012), Qt.PenStyle.SolidLine, Qt.PenCapStyle.RoundCap, Qt.PenJoinStyle.RoundJoin))
    painter.setBrush(QColor("#0B1005"))
    painter.drawPolygon(bolt)
    painter.end()
    return pixmap


def media_icon(kind: MediaKind, size: int = 64) -> QIcon:
    pixmap = QPixmap(size, size)
    pixmap.fill(Qt.GlobalColor.transparent)
    painter = QPainter(pixmap)
    painter.setRenderHint(QPainter.RenderHint.Antialiasing, True)
    scale = size / 64.0

    if kind == MediaKind.VIDEO:
        background = QColor("#202319")
        border = QColor("#3B4527")
        glyph = QColor(ACCENT)
    else:
        background = QColor("#15231D")
        border = QColor("#2A4639")
        glyph = QColor("#91E1B5")

    painter.setPen(QPen(border, 2.0 * scale))
    painter.setBrush(background)
    painter.drawRoundedRect(QRectF(1.5 * scale, 1.5 * scale, 61 * scale, 61 * scale), 15 * scale, 15 * scale)

    if kind == MediaKind.VIDEO:
        triangle = QPolygonF(
            [
                QPointF(25 * scale, 19 * scale),
                QPointF(48 * scale, 32 * scale),
                QPointF(25 * scale, 45 * scale),
            ]
        )
        painter.setPen(Qt.PenStyle.NoPen)
        painter.setBrush(glyph)
        painter.drawPolygon(triangle)
    else:
        painter.setBrush(Qt.BrushStyle.NoBrush)
        painter.setPen(QPen(glyph, 3.2 * scale, Qt.PenStyle.SolidLine, Qt.PenCapStyle.RoundCap, Qt.PenJoinStyle.RoundJoin))
        painter.drawEllipse(QRectF(17 * scale, 16 * scale, 9 * scale, 9 * scale))
        mountain = QPainterPath()
        mountain.moveTo(13 * scale, 47 * scale)
        mountain.lineTo(27 * scale, 31 * scale)
        mountain.lineTo(36 * scale, 40 * scale)
        mountain.lineTo(43 * scale, 32 * scale)
        mountain.lineTo(52 * scale, 47 * scale)
        painter.drawPath(mountain)
        painter.setPen(QPen(glyph, 2.4 * scale))
        painter.drawRoundedRect(QRectF(11 * scale, 13 * scale, 42 * scale, 38 * scale), 6 * scale, 6 * scale)

    painter.end()
    return QIcon(pixmap)