import * as PIXI from 'pixi.js';
import * as TWEEDLE from 'tweedle.js';
import * as Tool from './tool';
import star from '/img/map/star.png';
import { MAP_MIRROR } from './constants';

export default class Player {

    constructor(dom, themeMode) {
        this.themeMode = themeMode;

        this.app = generateApp(dom, themeMode);
        dom.appendChild(this.app.view);

        globalThis.__PIXI_APP__ = this.app;

        this.mapContainer = generatePixiContainer('mapContainer');
        this.app.stage.addChild(this.mapContainer);

        this.activateMapScale();
        this.activateMapPan();
        this.showCoordinates();
        this.startupTicker();

        // const bunny = PIXI.Sprite.from('https://pixijs.com/assets/bunny.png');
        // bunny.anchor.set(0.5);
        // bunny.x = 500;
        // bunny.y = 400;
        // this.mapContainer.addChild(bunny);
        // this.app.ticker.add((delta) => {
        //     bunny.rotation += 0.1 * delta;
        // });

    }

    activateMapMultiSelect = (fn) => {
        const mapMultiSelectHandle = (event) => {
            if (event.button !== 0) {
                return;
            }

            let isSelecting = false;
            if (!this.selectionBox) {
                this.selectionBox = new PIXI.Graphics();
                this.app.stage.addChild(this.selectionBox);
            }

            // select start pos
            const startPoint = new PIXI.Point();
            this.app.renderer.events.mapPositionToPoint(startPoint, event.clientX, event.clientY);
            let selectionStart = { x: startPoint.x, y: startPoint.y };

            // avoid trigger sprite event
            let hasHitSprite = false;
            for (let child of this.mapContainer.children) {
                if (child.data?.uuid) {
                    if (child.getBounds().contains(selectionStart.x, selectionStart.y)) {
                        hasHitSprite = true; break;
                    }
                }
            }

            if (!hasHitSprite) {
                isSelecting = true;
            }

            const handleMouseMove = (event) => {
                if (isSelecting) {
                    // select end pos
                    const endPoint = new PIXI.Point();
                    this.app.renderer.events.mapPositionToPoint(endPoint, event.clientX, event.clientY);
                    const selectionEnd = { x: endPoint.x, y: endPoint.y }

                    const width = Math.abs(selectionEnd.x - selectionStart.x);
                    const height = Math.abs(selectionEnd.y - selectionStart.y);

                    this.selectionBox.clear();
                    this.selectionBox.lineStyle(2, 0xCCCCCC, 1);
                    this.selectionBox.beginFill(0xCCCCCC, 0.2);
                    this.selectionBox.drawRect(Math.min(selectionStart.x, selectionEnd.x), Math.min(selectionStart.y, selectionEnd.y), width, height);
                    this.selectionBox.endFill();
                }
            }

            this.mapContainer.parent.on('mousemove', handleMouseMove);

            this.mapContainer.parent.on('mouseup', (event) => {
                if (isSelecting) {
                    this.clearSelectedSprites();

                    // sprite show style which be selected
                    this.mapContainer.children.forEach(child => {
                        if (Tool.isSpriteInSelectionBox(child, this.selectionBox)) {
                            this.selectedSprites.push(child);
                            Tool.markSprite(child);
                        }
                    })
                    isSelecting = false;
                    this.selectionBox.clear();

                    // complete
                    if (fn) {
                        fn(this.selectedSprites, () => {
                            // trigger at end of selectionBox when fn happen mouseup
                            this.selectedSprites = [];
                            this.activateMapMultiSelect(fn);
                        });
                    }

                }

                this.mapContainer.parent.off('mousemove', handleMouseMove);
            });
        }

        this.mapContainer.parent.off('mousedown');
        this.mapContainer.parent.on('mousedown', mapMultiSelectHandle)
    }

    clearSelectedSprites = () => {
        if (this.selectedSprites && this.selectedSprites.length > 0) {
            this.selectedSprites.forEach(child => {
                Tool.unMarkSprite(child);
            })
        }
        this.selectedSprites = [];
    }

    activateMapScale = () => {
        this.scale = 1;
        this.app.view.addEventListener('wheel', (event) => {
            event.preventDefault();
            if (this.scale !== this.mapContainer.scale.x) {
                this.scale = this.mapContainer.scale.x;
            }

            const delta = Math.sign(event.deltaY);

            const mousePosition = new PIXI.Point();
            this.app.renderer.plugins.interaction.mapPositionToPoint(mousePosition, event.clientX, event.clientY);

            const diffPositionX = mousePosition.x - this.mapContainer.x;
            const diffPositionY = mousePosition.y - this.mapContainer.y;

            const newScale = this.scale * (delta === 1 ? 0.9 : 1.1);
            const scaleFactor = newScale / this.scale;

            this.mapContainer.x = mousePosition.x - diffPositionX * scaleFactor;
            this.mapContainer.y = mousePosition.y - diffPositionY * scaleFactor;

            this.scale = newScale;

            this.mapContainer.scale.set(this.scale, Math.abs(this.scale));

            this.mapContainer.children.forEach(child => {
                // child.scale.set(1 / (this.scale * 1)); // 防止图标变小

                // switch (child.data?.type) {
                //     case DEVICE_TYPE.POINT:
                //         child.scale.set(1 / (this.scale * 20));
                //         break
                //     default:
                //         break
                // }
            });
        });
    }

    activateMapPan = () => {
        const mapPanHandle = (event) => {
            if (event.button === 2) {
                this.pan = true;
                let previousPosition = { x: event.clientX, y: event.clientY };

                const mouseMoveHandler = (event) => {
                    if (this.pan) {
                        const dx = event.clientX - previousPosition.x;
                        const dy = event.clientY - previousPosition.y;
                        this.mapContainer.position.x += dx;
                        this.mapContainer.position.y += dy;

                        previousPosition = { x: event.clientX, y: event.clientY };
                    }
                };
                this.app.view.addEventListener('mousemove', mouseMoveHandler);
                this.app.view.addEventListener('mouseup', () => {
                    this.app.view.removeEventListener('mousemove', mouseMoveHandler);
                    this.pan = false;
                });
            }
        }
        this.app.view.addEventListener('mousedown', mapPanHandle);
    }

    adaptScreen = () => {
        if (!this.mapContainer || !this.app) {
            return;
        }

        this.mapContainer.scale.set(1);
        this.mapContainer.position.set(0, 0);
        if (this.mapContainer.children.length === 0) {
            return;
        }

        let minX, maxX, minY, maxY;
        for (let sprite of this.mapContainer.children) {
            if (sprite?.data?.uuid) {
                let bounds = sprite.getBounds();
                minX = minX !== undefined ? Math.min(minX, bounds.x) : bounds.x;
                minY = minY !== undefined ? Math.min(minY, bounds.y) : bounds.y;
                maxX = maxX !== undefined ? Math.max(maxX, bounds.x + bounds.width) : bounds.x + bounds.width;
                maxY = maxY !== undefined ? Math.max(maxY, bounds.y + bounds.height) : bounds.y + bounds.height;
            }
        }

        this.scale = Math.min(
            this.app.renderer.width / (maxX - minX) * 0.8,
            this.app.renderer.height / (maxY - minY) * 0.8
        );

        let centerPoint = {
            x: (minX + maxX) / 2 * this.mapContainer.scale.x,
            y: (minY + maxY) / 2 * this.mapContainer.scale.y
        };

        new TWEEDLE.Tween(this.mapContainer.scale).easing(TWEEDLE.Easing.Quadratic.Out)
            .to({
                x: MAP_MIRROR ? -this.scale : this.scale,
                y: this.scale
            }, 200).start();

        new TWEEDLE.Tween(this.mapContainer.position).easing(TWEEDLE.Easing.Quadratic.Out)
            .to({
                x: this.app.renderer.width / 2 - centerPoint.x * this.scale,
                y: this.app.renderer.height / 2 - centerPoint.y * this.scale
            }, 200).start();
    }

    rotateMap = (value = 0) => {
        const bounds = this.mapContainer.getLocalBounds();
        const centerX = bounds.x + bounds.width / 2;
        const centerY = bounds.y + bounds.height / 2;
        this.mapContainer.pivot.set(centerX, centerY);
        this.mapContainer.position.set(this.app.renderer.width / 2, this.app.renderer.height / 2);

        const newRotation = this.mapContainer.rotation + value;

        const rotationDegrees = (newRotation * 180 / Math.PI) % 360;
        this.rotationText.text = `{ ROTATION: ${rotationDegrees.toFixed(1)}° }`;

        new TWEEDLE.Tween(this.mapContainer)
            .to({ rotation: newRotation }, 200)
            .easing(TWEEDLE.Easing.Quadratic.Out)
            .onComplete(() => {
                localStorage.setItem('mapRotation', newRotation % (Math.PI * 2));
            })
            .start();
    }

    showCoordinates = () => {
        this.coordinatesText = new PIXI.Text('{ X: 0, Y: 0 }', {
            fill: this.themeMode === 'dark' ? 0xdddddd : 0x333333,
            fontSize: 13,
            fontFamily: 'Microsoft YaHei',
            fontWeight: 'bold',
        });
        this.coordinatesText.name = 'xyStr';
        this.coordinatesText.position.set(10, 10);
        this.app.stage.addChild(this.coordinatesText);

        this.rotationText = new PIXI.Text('ROTATION: 0°', {
            fill: this.themeMode === 'dark' ? 0xdddddd : 0x333333,
            fontSize: 13,
            fontFamily: 'Microsoft YaHei',
            fontWeight: 'bold',
        });
        this.rotationText.name = 'rotationStr';
        this.rotationText.position.set(10, 35);
        this.app.stage.addChild(this.rotationText);

        this.app.stage.on('pointermove', (event) => {
            const worldPos = event.data.getLocalPosition(this.mapContainer);
            this.coordinatesText.text = `{ X: ${worldPos.x.toFixed(2)}, Y: ${worldPos.y.toFixed(2)} }`;
        });
    }


    showGridLines = () => {
        this.hideGridLines();
        if (!this.gridLineContainer) {
            this.gridLineContainer = generatePixiContainer('gridLineContainer');
            this.app.stage.addChild(this.gridLineContainer);
        }

        const spacing = 30;
        const lineDefaultAlpha = .1;;
        const lineDefaultColor = 0x000000;
        for (let i = 0; i < this.app.view.width / spacing; i++) {
            const graphics = new PIXI.Graphics();
            graphics.lineStyle(1, lineDefaultColor, lineDefaultAlpha);
            graphics.beginFill(lineDefaultColor);
            graphics.moveTo(i * spacing, 0);
            graphics.lineTo(i * spacing, this.app.view.height);
            graphics.endFill();
            this.gridLineContainer.addChild(graphics);
        }

        for (let i = 0; i < this.app.view.height / spacing; i++) {
            const graphics = new PIXI.Graphics();
            graphics.lineStyle(1, lineDefaultColor, lineDefaultAlpha);
            graphics.beginFill(lineDefaultColor);
            graphics.moveTo(0, i * spacing);
            graphics.lineTo(this.app.view.width, i * spacing);
            graphics.endFill();

            this.gridLineContainer.addChild(graphics);
        }
    }

    hideGridLines = () => {
        if (this.gridLineContainer) {
            this.app.stage.removeChild(this.gridLineContainer);
            this.gridLineContainer = null;
        }
    }

    showStarryBackground = (tint = 0x8395a7) => {
        if (!this.starryContainer) {
            this.starryContainer = generatePixiContainer('starryContainer');
            this.app.stage.addChild(this.starryContainer);
        }

        const starTexture = PIXI.Texture.from(star);

        const starAmount = 300;
        let cameraZ = 0;
        const fov = 20;
        const baseSpeed = 0.025;
        let speed = 0;
        let warpSpeed = 1;
        const starStretch = 5;
        const starBaseSize = 0.05;

        const stars = [];

        for (let i = 0; i < starAmount; i++) {
            const star = {
                sprite: new PIXI.Sprite(starTexture),
                z: 0,
                x: 0,
                y: 0,
            };
            star.sprite.anchor.x = 0.5;
            star.sprite.anchor.y = 0.7;
            star.sprite.tint = tint; // filter
            randomizeStar(star, true);
            this.starryContainer.addChild(star.sprite);
            stars.push(star);
        }

        this.starryInterval = setInterval(() => {
            warpSpeed = warpSpeed > 0 ? 0 : 1;
        }, 5000);

        this.starryTicker = (delta) => {
            speed += (warpSpeed - speed) / 20;
            cameraZ += delta * 10 * (speed + baseSpeed);
            for (let i = 0; i < starAmount; i++) {
                const star = stars[i];
                if (star.z < cameraZ) randomizeStar(star);

                const z = star.z - cameraZ;
                star.sprite.x = star.x * (fov / z) * this.app.renderer.screen.width + this.app.renderer.screen.width / 2;
                star.sprite.y = star.y * (fov / z) * this.app.renderer.screen.width + this.app.renderer.screen.height / 2;

                const dxCenter = star.sprite.x - this.app.renderer.screen.width / 2;
                const dyCenter = star.sprite.y - this.app.renderer.screen.height / 2;
                const distanceCenter = Math.sqrt(dxCenter * dxCenter + dyCenter * dyCenter);
                const distanceScale = Math.max(0, (2000 - z) / 2000);
                star.sprite.scale.x = distanceScale * starBaseSize;

                star.sprite.scale.y = distanceScale * starBaseSize + distanceScale * speed * starStretch * distanceCenter / this.app.renderer.screen.width;
                star.sprite.rotation = Math.atan2(dyCenter, dxCenter) + Math.PI / 2;
            }
        }

        this.app.ticker.add(this.starryTicker);

        function randomizeStar(star, initial) {
            star.z = initial ? Math.random() * 2000 : cameraZ + Math.random() * 1000 + 2000;

            const deg = Math.random() * Math.PI * 2;
            const distance = Math.random() * 50 + 1;
            star.x = Math.cos(deg) * distance;
            star.y = Math.sin(deg) * distance;
        }
    }

    hideStarryBackground = () => {
        if (this.starryTicker) {
            this.app.ticker.remove(this.starryTicker);
            this.starryTicker = null;
        }

        if (this.starryInterval) {
            clearInterval(this.starryInterval);
            this.starryInterval = null;
        }

        if (this.starryContainer) {
            this.starryContainer.removeChildren();
            this.app.stage.removeChild(this.starryContainer);
            this.starryContainer = null;
        }
    }

    startupTicker = () => {
        this.tweedle = (delta) => {
            TWEEDLE.Group.shared.update();
        }
        this.app.ticker.add(this.tweedle);
    }

    resize = (width, height) => {
        this.app.renderer.resize(width, height);
    }

    destroy = () => {
        TWEEDLE.Group.shared.removeAll();
        this.app.ticker.remove(this.tweedle);
        this.app.destroy(true, { children: true });
    }

    setTheme = (themeMode) => {
        this.app.renderer.background.color = themeMode === 'dark' ? '#3a3f44' : '#f1f2f6';
        if (this.coordinatesText) {
            this.coordinatesText.style.fill = themeMode === 'dark' ? 0xdddddd : 0x333333;
        }
        if (this.rotationText) {
            this.rotationText.style.fill = themeMode === 'dark' ? 0xdddddd : 0x333333;
        }
    }

}

const generateApp = (dom, themeMode) => {
    const app = new PIXI.Application({
        background: themeMode === 'dark' ? '#3b4148' : '#f1f2f6',
        antialias: true,
        // resizeTo: dom,
    })
    app.stage.eventMode = 'static';
    app.stage.hitArea = app.screen;

    app.view.addEventListener('contextmenu', (event) => {
        event.preventDefault();
    });

    app.view.style.display = 'block';
    app.view.style.margin = '0';
    app.view.style.padding = '0';
    app.view.style.border = 'none';

    return app;
}

const generatePixiContainer = (name) => {
    const mapContainer = new PIXI.Container();
    mapContainer.sortableChildren = true;
    mapContainer.name = name;
    mapContainer.data = {};
    return mapContainer;
}