import Quickshell
import QtQuick
import ZShell.Config
import qs.Components

CustomMouseArea {
	id: root

	required property real borderThickness
	required property Drawing drawing
	required property Panels panels
	required property ScreenState screenState
	required property EdgeGeometry geometry

	function inLeftPanel(panel: Item, x: real, y: real): bool {
		return x < panel.x + panel.width + geometry.insetLeft(borderThickness) && withinPanelHeight(panel, x, y);
	}

	function withinPanelHeight(panel: Item, x: real, y: real): bool {
		const panelY = panel.y + geometry.insetTop(borderThickness);
		return y >= panelY && y <= panelY + panel.height;
	}

	anchors.fill: parent
	acceptedButtons: Qt.LeftButton | Qt.RightButton
	cursorShape: Qt.BlankCursor
	enabled: z > 0
	hoverEnabled: true
	focus: root.screenState.isDrawing
	z: 2

	Binding {
		target: root.drawing.content
		property: "hoverPoint"
		value: Qt.point(root.mouseX, root.mouseY)
	}

	Keys.onPressed: e => {
		const mod = e.modifiers;
		const key = e.key;

		if ((key == Qt.Key_Z) && (mod & Qt.ControlModifier) && (mod & Qt.ShiftModifier)) {
			root.drawing.content.redo();
			e.accepted = true;
		} else if ((key == Qt.Key_Z) && (mod & Qt.ControlModifier)) {
			root.drawing.content.undoLastGroup();
			e.accepted = true;
		}
	}

	onPositionChanged: event => {
		const x = event.x;
		const y = event.y;

		if (!drawing.content.hoverVisible)
			drawing.content.showHover();

		if (event.buttons & Qt.LeftButton) {
			drawing.content.appendPoint(x, y);
			return;
		}

		if (!(event.buttons & Qt.LeftButton) && inLeftPanel(panels.drawing, x, y)) {
			z = -2;
			panels.drawing.expand();
			drawing.content.hideHover();
		}
	}
	onPressed: event => {
		const x = event.x;
		const y = event.y;

		panels.drawing.collapse();

		if (event.buttons & Qt.LeftButton) {
			panels.drawing.collapse();
			drawing.content.beginStroke(x, y);
			return;
		}

		if (event.button & Qt.RightButton) {
			drawing.content.clear();
			return;
		}
	}
	onReleased: event => {
		const x = event.x;
		const y = event.y;

		if (event.button & Qt.LeftButton) {
			drawing.content.endStroke();
			drawing.content.showHover();
		}
	}
}