"""
ui/windows/debug_window.py

DEBUG window — developer-mode only.

Minimal first pass: a live console showing everything the app has printed
via core.debug_log (stdout/stderr tee), so debugging doesn't require a
terminal. Not wired to any other diagnostics yet — extend as needed.
"""

from PyQt6.QtWidgets import (
    QWidget, QVBoxLayout, QHBoxLayout, QLabel, QPushButton,
    QTextEdit, QFrame,
)
from PyQt6.QtCore import Qt, pyqtSignal
from PyQt6.QtGui import QFont, QCloseEvent

from core.debug_log import get_broadcaster, get_history


class DebugWindow(QWidget):
    closed = pyqtSignal()

    def __init__(self, parent=None):
        super().__init__(parent, Qt.WindowType.Window | Qt.WindowType.Tool)
        self.setWindowTitle("Debug")
        self.setMinimumSize(560, 420)
        self.resize(700, 500)
        self._build()

        broadcaster = get_broadcaster()
        if broadcaster is not None:
            broadcaster.line_written.connect(self._append)

    def _build(self):
        root = QVBoxLayout(self); root.setContentsMargins(0, 0, 0, 0); root.setSpacing(0)

        hdr = QWidget(); hdr.setObjectName("devWindowTitleBar"); hdr.setFixedHeight(44)
        hl = QHBoxLayout(hdr); hl.setContentsMargins(14, 0, 14, 0)
        title = QLabel("DEBUG"); title.setObjectName("devWindowTitle")
        hl.addWidget(title, 1)
        clear_btn = QPushButton("Clear"); clear_btn.setObjectName("configButton")
        clear_btn.clicked.connect(lambda: self._console.clear())
        hl.addWidget(clear_btn)
        root.addWidget(hdr)

        div = QFrame(); div.setFrameShape(QFrame.Shape.HLine)
        div.setObjectName("devWindowDivider"); root.addWidget(div)

        self._console = QTextEdit(); self._console.setObjectName("codeEditor")
        self._console.setReadOnly(True)
        mono = QFont("IBM Plex Mono, Consolas, Monospace")
        mono.setStyleHint(QFont.StyleHint.Monospace)
        self._console.setFont(mono)
        self._console.setPlainText(get_history())
        self._console.verticalScrollBar().setValue(self._console.verticalScrollBar().maximum())
        root.addWidget(self._console, 1)

    def _append(self, text: str):
        self._console.insertPlainText(text)
        sb = self._console.verticalScrollBar()
        sb.setValue(sb.maximum())

    def closeEvent(self, e: QCloseEvent):
        self.closed.emit(); e.accept()