"""Configuration dialog for grid, routing, animation and theming options."""
from __future__ import annotations

from PyQt6.QtWidgets import (
    QCheckBox, QComboBox, QDialog, QDialogButtonBox, QDoubleSpinBox, QFormLayout,
    QSpinBox, QVBoxLayout,
)

from ..config import AppConfig


class ConfigDialog(QDialog):
    """Edits an :class:`AppConfig` in place; applies on accept."""

    def __init__(self, config: AppConfig, scheme_names: list[str], parent=None):
        super().__init__(parent)
        self.setWindowTitle("Editor Configuration")
        self.config = config
        layout = QVBoxLayout(self)
        form = QFormLayout()
        layout.addLayout(form)

        self.grid = QSpinBox()
        self.grid.setRange(2, 200)
        self.grid.setValue(config.grid_size)
        form.addRow("Grid size", self.grid)

        self.show_grid = QCheckBox()
        self.show_grid.setChecked(config.show_grid)
        form.addRow("Show grid", self.show_grid)

        self.snap = QCheckBox()
        self.snap.setChecked(config.snap_to_grid)
        form.addRow("Snap to grid", self.snap)

        self.arc = QCheckBox()
        self.arc.setChecked(config.arc_on_crossing)
        form.addRow("Arc on crossing", self.arc)

        self.arc_radius = QDoubleSpinBox()
        self.arc_radius.setRange(2, 20)
        self.arc_radius.setValue(config.arc_radius)
        form.addRow("Arc radius", self.arc_radius)

        self.stub = QSpinBox()
        self.stub.setRange(0, 200)
        self.stub.setValue(config.route_stub)
        form.addRow("Route stub", self.stub)

        self.anim = QDoubleSpinBox()
        self.anim.setRange(0.1, 10.0)
        self.anim.setSingleStep(0.1)
        self.anim.setValue(config.animation_speed)
        form.addRow("Animation speed", self.anim)

        self.scheme = QComboBox()
        self.scheme.addItems(scheme_names)
        if config.color_scheme in scheme_names:
            self.scheme.setCurrentText(config.color_scheme)
        form.addRow("Color scheme", self.scheme)

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

    def apply(self) -> None:
        c = self.config
        c.grid_size = self.grid.value()
        c.show_grid = self.show_grid.isChecked()
        c.snap_to_grid = self.snap.isChecked()
        c.arc_on_crossing = self.arc.isChecked()
        c.arc_radius = self.arc_radius.value()
        c.route_stub = self.stub.value()
        c.animation_speed = self.anim.value()
        c.color_scheme = self.scheme.currentText()
        c.emit_changed()