import { EDITOR_CONFIG, MapAreaType, type MapPen, 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, s8 } from '@meta2d/core';
import { useObservable } from '@vueuse/rxjs';
import { clone, cloneDeep, get, isNil, pick, remove, some } from 'lodash-es';
import { BehaviorSubject, debounceTime, filter, map, Subject, switchMap } from 'rxjs';
import { watch } from 'vue';

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

export class EditorService extends Meta2d {
  public load(map?: string, readonly = false): void {
    const data = map ? JSON.parse(map) : undefined;
    this.open(data);
    this.setState(readonly);
  }
  public save(): string {
    const data = this.data();
    const map = JSON.stringify(data);
    return map;
  }
  public export(): string {
    const png = this.toPng(10);
    return png;
  }

  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]),
        ),
      ),
    ),
  );

  public override data(): SceneData {
    return super.data();
  }
  public override find(target: string): MapPen[] {
    return super.find(target);
  }

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

  //#region 机器人
  readonly #robotMap = new Map<RobotInfo['id'], RobotInfo>();
  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;
  }

  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

  //#region 点位
  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', `point-${type}`],
      label: `P-${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)] });
  }

  #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
  //#endregion

  //#region 区域
  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 pen: MapPen = {
      name: 'area',
      tags: ['area', `area-${type}`],
      x: Math.min(p1.x, p2.x),
      y: Math.min(p1.y, p2.y),
      width: w,
      height: h,
      area: { type },
      locked: LockState.DisableMoveScale,
    };
    const area = await this.addPen(pen, false, true, true);
    this.bottom(area);
    this.pushHistory({ type: EditType.Add, pens: [cloneDeep(pen)] });
  }
  //#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 {
    if (theme) {
      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();
        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-${type}`) ?? '';
      ctx.fill();
      ctx.strokeStyle = get(theme, active ? 'point-s.strokeActive' : 'point-s.stroke') ?? '';
      if (type === MapPointType.临时避让点) {
        ctx.lineCap = 'round';
        ctx.beginPath();
        ctx.moveTo(x + 0.66 * r, y + h / 2 - 0.66 * r);
        ctx.lineTo(x + r, y + h / 2 - r);
        ctx.moveTo(x + w / 2 - 0.66 * r, y + 0.66 * r);
        ctx.lineTo(x + w / 2 - r, y + r);
        ctx.moveTo(x + w / 2 + 0.66 * r, y + 0.66 * r);
        ctx.lineTo(x + w / 2 + r, y + r);
        ctx.moveTo(x + w - 0.66 * r, y + h / 2 - 0.66 * r);
        ctx.lineTo(x + w - r, y + h / 2 - r);
        ctx.moveTo(x + w - 0.66 * r, y + h / 2 + 0.66 * r);
        ctx.lineTo(x + w - r, y + h / 2 + r);
        ctx.moveTo(x + w / 2 + 0.66 * r, y + h - 0.66 * r);
        ctx.lineTo(x + w / 2 + r, y + h - r);
        ctx.moveTo(x + w / 2 - 0.66 * r, y + h - 0.66 * r);
        ctx.lineTo(x + w / 2 - r, y + h - r);
        ctx.moveTo(x + 0.66 * r, y + h / 2 + 0.66 * r);
        ctx.lineTo(x + r, y + h / 2 + r);
      }
      ctx.stroke();
      break;
    case MapPointType.电梯点:
    case MapPointType.自动门点:
    case MapPointType.充电点:
    case MapPointType.停靠点:
    case MapPointType.动作点:
      ctx.roundRect(x, y, w, h, r);
      ctx.strokeStyle = get(theme, active ? 'point-l.strokeActive' : 'point-l.stroke') ?? '';
      ctx.stroke();
      break;
    default:
      break;
  }
  ctx.fillStyle = get(theme, 'color') ?? '';
  ctx.font = `${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 { x = 0, y = 0, width = 0, height = 0 } = pen.calculative?.worldRect ?? {};
  const { type } = pen.area ?? {};
  ctx.save();
  ctx.lineWidth = 1;
  ctx.strokeRect(x, y, width, height);
  ctx.fillStyle = '#fff';
  ctx.fillText(String(type), x + width / 2, y);
  ctx.restore();
}
//#endregion