# top_bar_widget.py

from PySide6.QtWidgets import QFrame, QHBoxLayout, QLabel, QPushButton
from PySide6.QtCore import Qt, QTimer, Signal
from PySide6.QtGui import QFont
from datetime import datetime


# ─────────────────────────────────────────
# THEMES
# ─────────────────────────────────────────

THEMES = [
    {
        'name':       'GREEN',
        'accent':     '#00ff41',
        'accent_dim': '#00aa2a',
        'bg':         '#0d0d0d',
        'bg2':        '#111111',
        'border':     '#1a3a1a',
        'text':       '#cccccc',
    },
    {
        'name':       'AMBER',
        'accent':     '#ffaa00',
        'accent_dim': '#cc8800',
        'bg':         '#0d0d00',
        'bg2':        '#111100',
        'border':     '#3a3000',
        'text':       '#ddddcc',
    },
    {
        'name':       'BLUE',
        'accent':     '#00aaff',
        'accent_dim': '#0077cc',
        'bg':         '#00080d',
        'bg2':        '#001122',
        'border':     '#001a3a',
        'text':       '#ccd8dd',
    },
    {
        'name':       'RED',
        'accent':     '#ff4444',
        'accent_dim': '#cc2222',
        'bg':         '#0d0000',
        'bg2':        '#110000',
        'border':     '#3a0000',
        'text':       '#ddcccc',
    },
]


class TopBarWidget(QFrame):
    theme_changed = Signal(dict)

    def __init__(self, parent=None):
        super().__init__(parent)

        self._theme_index = 0

        self.setFrameStyle(QFrame.Box | QFrame.Raised)
        self.setFixedHeight(80)
        self._apply_bar_style()

        self._build_ui()

        self.timer = QTimer(self)
        self.timer.setInterval(1000)
        self.timer.timeout.connect(self._update)
        self.timer.start()

        self._update()

    def _apply_bar_style(self):
        theme = THEMES[self._theme_index]
        self.setStyleSheet(f"""
            QFrame {{
                background-color: {theme['bg2']};
                border: 2px solid {theme['border']};
                border-radius: 6px;
            }}
        """)

    def _build_ui(self):
        layout = QHBoxLayout(self)
        layout.setContentsMargins(20, 8, 20, 8)
        layout.setSpacing(12)

        # Theme cycle button
        self.theme_btn = QPushButton("◈")
        self.theme_btn.setFixedSize(40, 40)
        self.theme_btn.setFont(QFont("Arial", 16, QFont.Bold))
        self.theme_btn.setToolTip("Cycle colour theme")
        self.theme_btn.clicked.connect(self._cycle_theme)
        self._style_theme_btn()
        layout.addWidget(self.theme_btn)

        # Station name
        self.station_label = QLabel("RADIO PANEL")
        self.station_label.setFont(QFont("Arial", 16, QFont.Bold))
        self.station_label.setStyleSheet(
            "color: #444444; background: transparent; border: none;"
        )
        self.station_label.setAlignment(Qt.AlignLeft | Qt.AlignVCenter)
        layout.addWidget(self.station_label)

        layout.addStretch()

        # Date
        self.date_label = QLabel("")
        self.date_label.setFont(QFont("Arial", 20, QFont.Bold))
        self.date_label.setStyleSheet(
            "color: #aaaaaa; background: transparent; border: none;"
        )
        self.date_label.setAlignment(Qt.AlignCenter | Qt.AlignVCenter)
        layout.addWidget(self.date_label)

        layout.addStretch()

        # Clock
        self.clock_label = QLabel("")
        self.clock_label.setFont(QFont("Courier New", 42, QFont.Bold))
        self.clock_label.setAlignment(Qt.AlignRight | Qt.AlignVCenter)
        self.clock_label.setMinimumWidth(220)
        self._style_clock()
        layout.addWidget(self.clock_label)

    def _style_theme_btn(self):
        theme = THEMES[self._theme_index]
        self.theme_btn.setStyleSheet(f"""
            QPushButton {{
                background-color: transparent;
                color: {theme['accent']};
                border: 2px solid {theme['accent']};
                border-radius: 20px;
            }}
            QPushButton:hover {{
                background-color: {theme['accent']};
                color: #000000;
            }}
            QPushButton:pressed {{
                background-color: {theme['accent_dim']};
            }}
        """)

    def _style_clock(self):
        theme = THEMES[self._theme_index]
        self.clock_label.setStyleSheet(
            f"color: {theme['accent']}; background: transparent; border: none;"
        )

    def _cycle_theme(self):
        self._theme_index = (self._theme_index + 1) % len(THEMES)
        self._apply_bar_style()
        self._style_theme_btn()
        self._style_clock()
        self.theme_changed.emit(THEMES[self._theme_index])

    def _update(self):
        now = datetime.now()
        self.clock_label.setText(now.strftime("%H:%M:%S"))
        self.date_label.setText(now.strftime("%A %d %B %Y"))

    @property
    def current_theme(self) -> dict:
        return THEMES[self._theme_index]