"""Dialogue Imposition manuelle."""

from PyQt6.QtWidgets import (QDialog, QVBoxLayout, QHBoxLayout, QLabel,
                              QGroupBox, QComboBox, QSpinBox, QDoubleSpinBox,
                              QDialogButtonBox, QPushButton, QListWidget, QCheckBox)
from app.engine.pdf_utils import mm_to_pt
from app.dialogs.format_combo import populate_format_combo, get_selected_size, handle_format_selection


class ManualImposeDialog(QDialog):
    def __init__(self, total_pages=1, parent=None):
        super().__init__(parent)
        self.setWindowTitle("Imposition manuelle")
        self.setMinimumWidth(500)
        self._total_pages = total_pages
        self._placements = []
        self._setup_ui()

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

        grp_sheet = QGroupBox("Taille de la feuille cible")
        sl = QHBoxLayout(grp_sheet)
        sl.addWidget(QLabel("Format :"))
        self.combo_sheet = QComboBox()
        populate_format_combo(self.combo_sheet, "A3 Paysage")
        self.combo_sheet.activated.connect(lambda: handle_format_selection(self.combo_sheet, self))
        sl.addWidget(self.combo_sheet)
        layout.addWidget(grp_sheet)

        grp_place = QGroupBox("Placer une page")
        pl = QHBoxLayout(grp_place)
        pl.addWidget(QLabel("Page:"))
        self.spin_page = QSpinBox()
        self.spin_page.setRange(1, self._total_pages)
        pl.addWidget(self.spin_page)
        pl.addWidget(QLabel("X:"))
        self.spin_x = QDoubleSpinBox()
        self.spin_x.setRange(0, 2000)
        self.spin_x.setSuffix(" mm")
        pl.addWidget(self.spin_x)
        pl.addWidget(QLabel("Y:"))
        self.spin_y = QDoubleSpinBox()
        self.spin_y.setRange(0, 2000)
        self.spin_y.setSuffix(" mm")
        pl.addWidget(self.spin_y)
        pl.addWidget(QLabel("Rot:"))
        self.combo_rot = QComboBox()
        self.combo_rot.addItems(["0", "90", "180", "270"])
        pl.addWidget(self.combo_rot)
        pl.addWidget(QLabel("Ech:"))
        self.spin_scale = QDoubleSpinBox()
        self.spin_scale.setRange(0.1, 10.0)
        self.spin_scale.setValue(1.0)
        self.spin_scale.setSingleStep(0.1)
        pl.addWidget(self.spin_scale)
        layout.addWidget(grp_place)

        btn_layout = QHBoxLayout()
        btn_add = QPushButton("Ajouter")
        btn_add.clicked.connect(self._add_placement)
        btn_layout.addWidget(btn_add)
        btn_del = QPushButton("Supprimer")
        btn_del.clicked.connect(self._del_placement)
        btn_layout.addWidget(btn_del)
        btn_layout.addStretch()
        layout.addLayout(btn_layout)

        self.list_placements = QListWidget()
        layout.addWidget(self.list_placements)

        self.chk_crop = QCheckBox("Reperes de coupe")
        layout.addWidget(self.chk_crop)

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

    def _add_placement(self):
        p = {
            "page": self.spin_page.value(),
            "x": mm_to_pt(self.spin_x.value()),
            "y": mm_to_pt(self.spin_y.value()),
            "rotation": int(self.combo_rot.currentText()),
            "scale": self.spin_scale.value(),
        }
        self._placements.append(p)
        self.list_placements.addItem(
            f"Page {p['page']} — X={self.spin_x.value():.1f} Y={self.spin_y.value():.1f} mm "
            f"Rot={self.combo_rot.currentText()} Ech={self.spin_scale.value():.1f}"
        )

    def _del_placement(self):
        row = self.list_placements.currentRow()
        if row >= 0:
            self.list_placements.takeItem(row)
            self._placements.pop(row)

    def get_settings(self):
        return {
            "sheet_size": get_selected_size(self.combo_sheet),
            "placements": self._placements,
            "crop_marks": self.chk_crop.isChecked(),
        }