import { EDITOR_CONFIG, type MapAreaInfo, MapAreaType, type MapPen, type MapPointInfo, MapPointType } from '@api/map';
import type { RobotGroup, RobotInfo } from '@api/robot';
import type { SceneData } from '@api/scene';
import sTheme from '@core/theme.service';
import { CanvasLayer, EditType, LockState, Meta2d, type Pen, s8 } from '@meta2d/core';
import { useObservable } from '@vueuse/rxjs';
import { clone, cloneDeep, get, isNil, isString, mapKeys, pick, remove, some } from 'lodash-es';
import { BehaviorSubject, debounceTime, filter, map, Subject, switchMap } from 'rxjs';
import { reactive, watch } from 'vue';

export type Point = Record<'x' | 'y', number>;

export class EditorService extends Meta2d {
  public async load(map?: string, editable = false): Promise<void> {
    const data = map ? JSON.parse(map) : undefined;
    this.open(data);
    this.setState(editable);
  }
  public save(): string {
    const data = this.data();
    return JSON.stringify(data);
  }

  public setState(editable?: boolean): void {
    this.lock(editable ? LockState.None : LockState.DisableMoveScale);
  }

  public override data(): SceneData {
    return super.data();
  }

  readonly #mouse$$ = new Subject<{ type: 'click' | 'mousedown' | 'mouseup'; value: Point }>();
  public readonly mouseClick = useObservable<Point>(
    this.#mouse$$.pipe(
      filter(({ type }) => type === 'click'),
      debounceTime(100),
      map(({ value }) => value),
    ),
  );
  public readonly mouseBrush = useObservable<[Point, Point]>(
    this.#mouse$$.pipe(
      filter(({ type }) => type === 'mousedown'),
      switchMap(({ value: s }) =>
        this.#mouse$$.pipe(
          filter(({ type }) => type === 'mouseup'),
          map(({ value: e }) => <[Point, Point]>[s, e]),
        ),
      ),
    ),
  );

  //#region 机器人
  readonly #robotMap = reactive<Map<RobotInfo['id'], RobotInfo>>(new Map());
  public get robots(): RobotInfo[] {
    return Array.from(this.#robotMap.values());
  }

  public getRobotById(id: RobotInfo['id']): RobotInfo | undefined {
    return this.#robotMap.get(id);
  }

  public addRobots(gid: RobotInfo['gid'], robots: RobotInfo[]): void {
    const groups = clone(this.#robotGroups$$.value);
    const group = groups.find((v) => v.id === gid);
    if (isNil(group)) throw Error('未找到目标机器人组');
    group.robots ??= [];
    robots.forEach((v) => {
      if (this.#robotMap.has(v.id)) return;
      this.#robotMap.set(v.id, { ...v, gid });
      group.robots?.push(v.id);
    });
    this.#robotGroups$$.next(groups);
    (<SceneData>this.store.data).robots = [...this.#robotMap.values()];
    (<SceneData>this.store.data).robotGroups = this.#robotGroups$$.value;
  }
  public removeRobots(ids: RobotInfo['id'][]): void {
    ids?.forEach((v) => this.#robotMap.delete(v));
    const groups = clone(this.#robotGroups$$.value);
    groups.forEach(({ robots }) => remove(robots ?? [], (v) => !this.#robotMap.has(v)));
    this.#robotGroups$$.next(groups);
    (<SceneData>this.store.data).robots = [...this.#robotMap.values()];
    (<SceneData>this.store.data).robotGroups = this.#robotGroups$$.value;
  }
  public updateRobots(ids: RobotInfo['id'][], values: Partial<RobotInfo>): void {
    ids?.forEach((v) => {
      const robot = this.#robotMap.get(v);
      if (isNil(robot)) return;
      this.#robotMap.set(v, { ...robot, ...values });
    });
    (<SceneData>this.store.data).robots = [...this.#robotMap.values()];
  }

  readonly #robotGroups$$ = new BehaviorSubject<RobotGroup[]>([]);
  public readonly robotGroups = useObservable<RobotGroup[]>(this.#robotGroups$$.pipe(debounceTime(300)));

  public createRobotGroup(): void {
    const id = s8();
    const label = `RG${id}`;
    const groups = clone(this.#robotGroups$$.value);
    groups.push({ id, label });
    this.#robotGroups$$.next(groups);
    (<SceneData>this.store.data).robotGroups = this.#robotGroups$$.value;
  }
  public deleteRobotGroup(id: RobotGroup['id']): void {
    const groups = clone(this.#robotGroups$$.value);
    const group = groups.find((v) => v.id === id);
    group?.robots?.forEach((v) => this.#robotMap.delete(v));
    remove(groups, group);
    this.#robotGroups$$.next(groups);
    (<SceneData>this.store.data).robots = [...this.#robotMap.values()];
    (<SceneData>this.store.data).robotGroups = this.#robotGroups$$.value;
  }
  public updateRobotGroupLabel(id: RobotGroup['id'], label: RobotGroup['label']): void {
    const groups = this.#robotGroups$$.value;
    const group = groups.find((v) => v.id === id);
    if (isNil(group)) throw Error('未找到目标机器人组');
    if (some(groups, ['label', label])) throw Error('机器人组名称已经存在');
    group.label = label;
    this.#robotGroups$$.next([...groups]);
    (<SceneData>this.store.data).robotGroups = this.#robotGroups$$.value;
  }
  //#endregion

  readonly #change$$ = new Subject<boolean>();
  public readonly current = useObservable<MapPen>(
    this.#change$$.pipe(
      debounceTime(100),
      map(() => <MapPen>clone(this.store.active?.[0])),
    ),
  );
  public readonly selected = useObservable<string[], string[]>(
    this.#change$$.pipe(
      filter((v) => !v),
      debounceTime(100),
      map(() => this.store.active?.map(({ id }) => id).filter((v) => !isNil(v)) ?? []),
    ),
    { initialValue: new Array<string>() },
  );
  public readonly pens = useObservable<MapPen[]>(
    this.#change$$.pipe(
      filter((v) => v),
      debounceTime(100),
      map(() => this.data().pens),
    ),
  );

  public override find(target: string): MapPen[] {
    return super.find(target);
  }
  public getPenById(id?: string): MapPen | undefined {
    if (!id) return;
    return this.find(id)[0];
  }

  public override active(target: string | Pen[], emit?: boolean): void {
    const pens = isString(target) ? this.find(target) : target;
    super.active(pens, emit);
    this.render();
  }
  public override inactive(): void {
    super.inactive();
    this.render();
  }

  public updatePen(id: string, pen: Partial<MapPen>, record = true): void {
    this.setValue({ ...pen, id }, { render: record, history: record, doEvent: true });
  }

  //#region 点位
  public readonly points = useObservable<MapPen[], MapPen[]>(
    this.#change$$.pipe(
      filter((v) => v),
      debounceTime(100),
      map(() => this.find('point')),
    ),
    { initialValue: new Array<MapPen>() },
  );

  public async addPoint(p: Point, type = MapPointType.普通点): Promise<void> {
    const id = s8();
    const pen: MapPen = {
      ...p,
      ...this.#mapPoint(type),
      ...this.#mapPointImage(type),
      id,
      name: 'point',
      tags: ['point'],
      label: `P${id}`,
      point: { type },
    };
    const { x, y, width, height } = this.getPenRect(pen);
    pen.x = x - width / 2;
    pen.y = y - height / 2;
    await this.addPen(pen, false, true, true);
    // this.pushHistory({ type: EditType.Add, pens: [cloneDeep(pen)] });
  }

  public updatePoint(id: string, info: Partial<MapPointInfo>): void {
    const { point } = this.getPenById(id) ?? {};
    if (!point?.type) return;
    const o = { ...point, ...info };
    this.setValue({ id, point: o }, { render: true, history: true, doEvent: true });
  }
  public changePointType(id: string, type: MapPointType): void {
    this.setValue(
      { id, ...this.#mapPoint(type), ...this.#mapPointImage(type), point: { type } },
      { render: true, history: true, doEvent: true },
    );
  }

  #mapPoint(type: MapPointType): Required<Pick<MapPen, 'width' | 'height' | 'lineWidth' | 'iconSize'>> {
    const width = type < 10 ? 24 : 48;
    const height = type < 10 ? 24 : 60;
    const lineWidth = type < 10 ? 2 : 3;
    const iconSize = type < 10 ? 4 : 10;
    return { width, height, lineWidth, iconSize };
  }
  #mapPointImage(type: MapPointType): Required<Pick<MapPen, 'image' | 'canvasLayer'>> {
    const theme = this.data().theme;
    const image = type < 10 ? '' : `/point/${type}-${theme}.png`;
    return { image, canvasLayer: CanvasLayer.CanvasMain };
  }
  //#endregion

  //#region 线路
  public readonly routes = useObservable<MapPen[], MapPen[]>(
    this.#change$$.pipe(
      filter((v) => v),
      debounceTime(100),
      map(() => this.find('route').map((v) => (v.label = this.getRouteLabel(v.id)))),
    ),
    { initialValue: new Array<MapPen>() },
  );

  public getRouteLabel(id?: string): string {
    if (!id) return '';
    const pen = this.getPenById(id);
    if (isNil(pen)) return '';
    const [a1, a2] = pen.anchors ?? [];
    if (!a1?.connectTo || !a2?.connectTo) return '';
    const p1 = this.getPenById(a1.connectTo);
    const p2 = this.getPenById(a2.connectTo);
    if (isNil(p1) || isNil(p2)) return '';
    const { direction = 1 } = pen.route ?? {};
    return `${p1.text} ${direction > 0 ? '→' : '←'} ${p2.text}`;
  }
  //#endregion

  //#region 区域
  public readonly areas = useObservable<MapPen[], MapPen[]>(
    this.#change$$.pipe(
      filter((v) => v),
      debounceTime(100),
      map(() => this.find('area')),
    ),
    { initialValue: new Array<MapPen>() },
  );

  public getBoundAreas(id: string = '', name: 'point' | 'line', type: MapAreaType): MapPen[] {
    if (!id) return [];
    return this.find(`area-${type}`).filter(({ area }) => {
      if (name === 'point') return area?.points?.includes(id);
      if (name === 'line') return area?.routes?.includes(id);
      return false;
    });
  }

  public async addArea(p1: Point, p2: Point, type = MapAreaType.库区) {
    const scale = this.data().scale ?? 1;
    const w = Math.abs(p1.x - p2.x);
    const h = Math.abs(p1.y - p2.y);
    if (w * scale < 50 || h * scale < 60) return;
    const selected = <MapPen[]>this.store.active;
    const id = s8();
    const points = new Array<string>();
    const routes = new Array<string>();
    switch (type) {
      case MapAreaType.库区:
        selected?.filter(({ point }) => point?.type === MapPointType.动作点).forEach(({ id }) => points.push(id!));
        break;
      case MapAreaType.互斥区:
        selected?.filter(({ point }) => point?.type).forEach(({ id }) => points.push(id!));
        selected?.filter(({ route }) => route?.type).forEach(({ id }) => routes.push(id!));
        break;
      case MapAreaType.非互斥区:
        selected?.filter(({ point }) => point?.type).forEach(({ id }) => points.push(id!));
        break;
      default:
        break;
    }
    const pen: MapPen = {
      id,
      name: 'area',
      tags: ['area', `area-${type}`],
      label: `A${id}`,
      x: Math.min(p1.x, p2.x),
      y: Math.min(p1.y, p2.y),
      width: w,
      height: h,
      lineWidth: 1,
      area: { type, points, routes },
      locked: LockState.DisableMoveScale,
    };
    const area = await this.addPen(pen, false, true, true);
    this.bottom(area);
    // this.pushHistory({ type: EditType.Add, pens: [cloneDeep(pen)] });
  }

  public updateArea(id: string, info: Partial<MapAreaInfo>): void {
    const { area } = this.getPenById(id) ?? {};
    if (!area?.type) return;
    const o = { ...area, ...info };
    this.setValue({ id, area: o }, { render: true, history: true, doEvent: true });
  }
  //#endregion

  constructor(container: HTMLDivElement) {
    super(container, EDITOR_CONFIG);

    (<HTMLDivElement>container.children.item(5)).ondrop = null;
    this.on('*', (e, v) => this.#listen(e, v));
    this.#register();

    watch(
      () => sTheme.theme,
      (v) => this.#load(v),
      { immediate: true },
    );
  }

  #load(theme: string): void {
    this.setTheme(theme);

    const { robots, robotGroups } = this.data();
    this.#robotMap.clear();
    robots?.forEach((r) => this.#robotMap.set(r.id, r));
    this.#robotGroups$$.next(robotGroups ?? []);

    this.find('point').forEach((pen) => {
      if (!pen.point?.type) return;
      if (pen.point.type < 10) return;
      this.canvas.updateValue(pen, this.#mapPointImage(pen.point.type));
    });
    this.render();
  }

  // eslint-disable-next-line @typescript-eslint/no-explicit-any
  #listen(e: unknown, v: any) {
    switch (e) {
      case 'opened':
        this.#load(sTheme.theme);
        this.#change$$.next(true);
        break;

      case 'add':
      case 'delete':
      case 'update':
      case 'valueUpdate':
        this.#change$$.next(true);
        break;

      case 'active':
      case 'inactive':
        this.#change$$.next(false);
        break;

      // case 'undo':
      // case 'redo':
      //   {
      //     const { type, pens = [], initPens = [] } = data ?? {};
      //     switch (type) {
      //       case EditType.Add:
      //         pens?.forEach((pen: SceneMapPen) => {
      //           if (pen.name === 'point') {
      //             const { image } = this.#mapPointType(pen.point!.type);
      //             const rect = this.#editor?.getPenRect(pen);
      //             this.#editor?.setValue({ id: pen.id, image, ...rect }, { render: true, history: false });
      //           }
      //         });
      //         break;
      //       case EditType.Update:
      //         (event === 'undo' ? initPens : pens)?.forEach((pen: SceneMapPen) => {
      //           if (pen.name === 'point') {
      //             const { image } = this.#mapPointType(pen.point!.type);
      //             this.#editor?.setValue({ id: pen.id, image }, { render: true, history: false });
      //           }
      //         });
      //         break;
      //       default:
      //         break;
      //     }
      //   }
      //   break;

      case 'click':
      case 'mousedown':
      case 'mouseup':
        this.#mouse$$.next({ type: e, value: pick(v, 'x', 'y') });
        break;

      default:
        // console.log(e, v);
        break;
    }
  }

  #register() {
    this.registerCanvasDraw({ point: drawPoint, line: drawLine, area: drawArea });
    this.registerAnchors({ point: anchorPoint });
  }
}

//#region 绘制函数
function drawPoint(ctx: CanvasRenderingContext2D, pen: MapPen): void {
  const theme = sTheme.editor;
  const { active, iconSize: r = 0, fontSize = 14, lineHeight = 1.5, fontFamily } = pen.calculative ?? {};
  const { x = 0, y = 0, width: w = 0, height: h = 0 } = pen.calculative?.worldRect ?? {};
  const { type } = pen.point ?? {};
  const { label = '' } = pen ?? {};

  ctx.save();
  switch (type) {
    case MapPointType.普通点:
    case MapPointType.等待点:
    case MapPointType.避让点:
    case MapPointType.临时避让点:
      ctx.beginPath();
      ctx.moveTo(x + w / 2 - r, y + r);
      ctx.arcTo(x + w / 2, y, x + w - r, y + h / 2 - r, r);
      ctx.arcTo(x + w, y + h / 2, x + w / 2 + r, y + h - r, r);
      ctx.arcTo(x + w / 2, y + h, x + r, y + h / 2 + r, r);
      ctx.arcTo(x, y + h / 2, x + r, y + h / 2 - r, r);
      ctx.closePath();
      ctx.fillStyle = get(theme, `point-s.fill-${type}`) ?? '';
      ctx.fill();
      ctx.strokeStyle = get(theme, active ? 'point-s.strokeActive' : 'point-s.stroke') ?? '';
      if (type === MapPointType.临时避让点) {
        ctx.lineCap = 'round';
        ctx.beginPath();
        ctx.moveTo(x + 0.66 * r, y + h / 2 - 0.66 * r);
        ctx.lineTo(x + r, y + h / 2 - r);
        ctx.moveTo(x + w / 2 - 0.66 * r, y + 0.66 * r);
        ctx.lineTo(x + w / 2 - r, y + r);
        ctx.moveTo(x + w / 2 + 0.66 * r, y + 0.66 * r);
        ctx.lineTo(x + w / 2 + r, y + r);
        ctx.moveTo(x + w - 0.66 * r, y + h / 2 - 0.66 * r);
        ctx.lineTo(x + w - r, y + h / 2 - r);
        ctx.moveTo(x + w - 0.66 * r, y + h / 2 + 0.66 * r);
        ctx.lineTo(x + w - r, y + h / 2 + r);
        ctx.moveTo(x + w / 2 + 0.66 * r, y + h - 0.66 * r);
        ctx.lineTo(x + w / 2 + r, y + h - r);
        ctx.moveTo(x + w / 2 - 0.66 * r, y + h - 0.66 * r);
        ctx.lineTo(x + w / 2 - r, y + h - r);
        ctx.moveTo(x + 0.66 * r, y + h / 2 + 0.66 * r);
        ctx.lineTo(x + r, y + h / 2 + r);
      }
      ctx.stroke();
      break;
    case MapPointType.电梯点:
    case MapPointType.自动门点:
    case MapPointType.充电点:
    case MapPointType.停靠点:
    case MapPointType.动作点:
    case MapPointType.禁行点:
      ctx.roundRect(x, y, w, h, r);
      ctx.strokeStyle = get(theme, active ? 'point-l.strokeActive' : 'point-l.stroke') ?? '';
      ctx.stroke();
      break;
    default:
      break;
  }
  ctx.fillStyle = get(theme, 'color') ?? '';
  ctx.font = `${fontSize}px/${lineHeight} ${fontFamily}`;
  ctx.textAlign = 'center';
  ctx.textBaseline = 'top';
  ctx.fillText(label, x + w / 2, y - fontSize * lineHeight);
  ctx.restore();
}
function anchorPoint(pen: MapPen): void {
  pen.anchors = [{ x: 0.5, y: 0.5 }];
}

function drawLine(ctx: CanvasRenderingContext2D, pen: MapPen): void {
  const [p1, p2] = pen.calculative?.worldAnchors ?? [];
  const { direction } = pen.route ?? {};
  ctx.save();
  ctx.lineWidth = 2;
  ctx.restore();
}

function drawArea(ctx: CanvasRenderingContext2D, pen: MapPen): void {
  const theme = sTheme.editor;
  const { active, fontSize = 14, lineHeight = 1.5, fontFamily } = pen.calculative ?? {};
  const { x = 0, y = 0, width: w = 0, height: h = 0 } = pen.calculative?.worldRect ?? {};
  const { type } = pen.area ?? {};
  const { label = '' } = pen ?? {};

  ctx.save();
  ctx.rect(x, y, w, h);
  ctx.fillStyle = get(theme, `area.fill-${type}`) ?? '';
  ctx.fill();
  ctx.strokeStyle = get(theme, active ? 'area.strokeActive' : `area.stroke-${type}`) ?? '';
  ctx.stroke();
  ctx.fillStyle = get(theme, 'color') ?? '';
  ctx.font = `${fontSize}px/${lineHeight} ${fontFamily}`;
  ctx.textAlign = 'center';
  ctx.textBaseline = 'top';
  ctx.fillText(label, x + w / 2, y - fontSize * lineHeight);
  ctx.restore();
}
//#endregion