"""
dance_picker_dialog.py — Dialog til at vælge eller skrive en dans med autoudfyld.
"""

from PyQt6.QtWidgets import (
    QDialog, QVBoxLayout, QHBoxLayout, QLabel, QLineEdit,
    QPushButton, QListWidget, QListWidgetItem,
)
from PyQt6.QtCore import Qt, QTimer


class DancePickerDialog(QDialog):
    def __init__(self, current_dance: str = "", song_title: str = "", parent=None):
        super().__init__(parent)
        self._chosen = current_dance
        self.setWindowTitle("Vælg dans")
        self.setMinimumWidth(380)
        self.setFixedWidth(420)
        self._build_ui(current_dance, song_title)
        self._load_suggestions("")

    def _build_ui(self, current_dance: str, song_title: str):
        layout = QVBoxLayout(self)
        layout.setContentsMargins(12, 12, 12, 12)
        layout.setSpacing(8)

        if song_title:
            lbl = QLabel(song_title)
            lbl.setObjectName("track_title")
            lbl.setWordWrap(True)
            layout.addWidget(lbl)

        lbl2 = QLabel("Vælg eller skriv dans-navn:")
        lbl2.setObjectName("track_meta")
        layout.addWidget(lbl2)

        # Søgefelt med autoudfyld
        self._edit = QLineEdit()
        self._edit.setText(current_dance)
        self._edit.setPlaceholderText("Skriv dans-navn...")
        self._edit.selectAll()
        self._edit.textChanged.connect(self._on_text_changed)
        self._edit.returnPressed.connect(self._on_accept)
        layout.addWidget(self._edit)

        # Liste med forslag
        self._suggestion_list = QListWidget()
        self._suggestion_list.setMaximumHeight(180)
        self._suggestion_list.itemDoubleClicked.connect(self._on_item_selected)
        self._suggestion_list.itemClicked.connect(
            lambda item: self._edit.setText(item.text())
        )
        layout.addWidget(self._suggestion_list)

        # Debounce timer
        self._timer = QTimer(self)
        self._timer.setSingleShot(True)
        self._timer.setInterval(200)
        self._timer.timeout.connect(
            lambda: self._load_suggestions(self._edit.text().strip())
        )

        # Knapper
        btn_row = QHBoxLayout()
        btn_row.addStretch()
        btn_cancel = QPushButton("Annuller")
        btn_cancel.clicked.connect(self.reject)
        btn_row.addWidget(btn_cancel)
        btn_ok = QPushButton("✓  Vælg")
        btn_ok.setObjectName("btn_play")
        btn_ok.clicked.connect(self._on_accept)
        btn_row.addWidget(btn_ok)
        layout.addLayout(btn_row)

        self._edit.setFocus()

    def _on_text_changed(self, text: str):
        self._timer.start()

    def _load_suggestions(self, prefix: str):
        try:
            from local.local_db import get_dance_suggestions
            suggestions = get_dance_suggestions(prefix or "", limit=20)
            self._suggestion_list.clear()
            for s in suggestions:
                label = f"{s['name']} / {s['level_name']}" if s.get("level_name") else s["name"]
                item = QListWidgetItem(label)
                item.setData(Qt.ItemDataRole.UserRole, s["name"])
                self._suggestion_list.addItem(item)
        except Exception:
            pass

    def _on_item_selected(self, item: QListWidgetItem):
        name = item.data(Qt.ItemDataRole.UserRole) or item.text().split(" / ")[0]
        self._edit.setText(name)
        self._chosen = name
        self.accept()

    def _on_accept(self):
        self._chosen = self._edit.text().strip()
        if self._chosen:
            self.accept()

    def get_dance(self) -> str:
        return self._chosen