"""Dialogue Masquage (rectangles blancs)."""

from PyQt6.QtWidgets import (QDialog, QVBoxLayout, QHBoxLayout, QLabel,
                              QGroupBox, QComboBox, QDoubleSpinBox,
                              QDialogButtonBox, QPushButton, QListWidget,
                              QListWidgetItem)
from app.engine.pdf_utils import mm_to_pt


class MaskingDialog(QDialog):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.setWindowTitle("Masquage (ruban blanc)")
        self.setMinimumWidth(450)
        self._rectangles = []
        self._setup_ui()

    def _setup_ui(self):
        layout = QVBoxLayout(self)

        # Definition rectangle
        grp_rect = QGroupBox("Definir un rectangle de masquage (mm)")
        rl = QHBoxLayout(grp_rect)

        rl.addWidget(QLabel("X:"))
        self.spin_x = QDoubleSpinBox()
        self.spin_x.setRange(0, 1000)
        self.spin_x.setSuffix(" mm")
        rl.addWidget(self.spin_x)

        rl.addWidget(QLabel("Y:"))
        self.spin_y = QDoubleSpinBox()
        self.spin_y.setRange(0, 1000)
        self.spin_y.setSuffix(" mm")
        rl.addWidget(self.spin_y)

        rl.addWidget(QLabel("L:"))
        self.spin_w = QDoubleSpinBox()
        self.spin_w.setRange(1, 1000)
        self.spin_w.setValue(50)
        self.spin_w.setSuffix(" mm")
        rl.addWidget(self.spin_w)

        rl.addWidget(QLabel("H:"))
        self.spin_h = QDoubleSpinBox()
        self.spin_h.setRange(1, 1000)
        self.spin_h.setValue(10)
        self.spin_h.setSuffix(" mm")
        rl.addWidget(self.spin_h)

        layout.addWidget(grp_rect)

        # Boutons ajouter/supprimer
        btn_layout = QHBoxLayout()
        btn_add = QPushButton("Ajouter")
        btn_add.clicked.connect(self._add_rect)
        btn_layout.addWidget(btn_add)
        btn_del = QPushButton("Supprimer")
        btn_del.clicked.connect(self._del_rect)
        btn_layout.addWidget(btn_del)
        btn_layout.addStretch()
        layout.addLayout(btn_layout)

        # Liste des rectangles
        self.list_rects = QListWidget()
        layout.addWidget(self.list_rects)

        # Appliquer a
        grp_apply = QGroupBox("Appliquer a")
        al = QHBoxLayout(grp_apply)
        self.combo_apply = QComboBox()
        self.combo_apply.addItems(["Toutes les pages", "Pages paires", "Pages impaires"])
        al.addWidget(self.combo_apply)
        layout.addWidget(grp_apply)

        # Boutons
        buttons = QDialogButtonBox(
            QDialogButtonBox.StandardButton.Ok | QDialogButtonBox.StandardButton.Cancel
        )
        buttons.accepted.connect(self.accept)
        buttons.rejected.connect(self.reject)
        layout.addWidget(buttons)

    def _add_rect(self):
        rect = {
            "x": mm_to_pt(self.spin_x.value()),
            "y": mm_to_pt(self.spin_y.value()),
            "width": mm_to_pt(self.spin_w.value()),
            "height": mm_to_pt(self.spin_h.value()),
        }
        self._rectangles.append(rect)
        self.list_rects.addItem(
            f"X={self.spin_x.value():.1f} Y={self.spin_y.value():.1f} "
            f"L={self.spin_w.value():.1f} H={self.spin_h.value():.1f} mm"
        )

    def _del_rect(self):
        row = self.list_rects.currentRow()
        if row >= 0:
            self.list_rects.takeItem(row)
            self._rectangles.pop(row)

    def get_settings(self):
        apply_map = {
            "Toutes les pages": "all",
            "Pages paires": "even",
            "Pages impaires": "odd"
        }
        return {
            "rectangles": self._rectangles,
            "apply_to": apply_map[self.combo_apply.currentText()],
        }