import { KonvaEventObject } from "konva/lib/Node";
import { hasTouchEvents } from "../env";
import { Container } from "../packages";
import { EntityType, Entity } from "../packages/entity";
import { Attrib, ShapeType } from "../type";
import { getTouchOffset } from "./act";
import { createLineByDire, getDireDist } from "./math";
import { inRevise } from "./public";
import { disableMouse, enableMouse } from "./shape-mose";
import { generateId, getChangeAllPoart } from "./util";

const getExtendsProps = (parent: Entity<any, any>) => {
  return parent
    ? {
        reactive: parent.props.reactive,
        readonly: parent.props.reactive,
      }
    : {};
};

export const entityFactory = <
  T extends Attrib,
  S extends ShapeType,
  C extends EntityType<T, S, { attrib: T }>
>(
  attrib: T,
  Type: C,
  parent?: Entity<any, any>,
  extra?: (self: InstanceType<C>) => void,
  created?: (self: InstanceType<C>) => void
) => {
  const entity = new Type({
    attrib,
    ...getExtendsProps(parent),
  }) as InstanceType<C>;
  extra && extra(entity);
  if (parent) {
    entity.container = parent.container;
    entity.setParent(parent);
  }
  entity.init();
  entity.mount(entity.teleport);
  if (parent.isMounted) {
    entity.mounted();
  }
  created && created(entity);
  return entity;
};

export type IncEntitysFactory<T extends Attrib, E extends Entity<T, any>> = (
  attribs: T[] | T
) => IncEntitys<T, E>;

export type IncEntitys<T extends Attrib, E extends Entity<T, any>> = {
  adds: E[];
  dels: E[];
  upds: E[];
};

// 增量工厂
export const incEntitysFactoryGenerate = <
  T extends Attrib,
  S extends ShapeType,
  C extends EntityType<T, S, { attrib: T }>
>(
  Type: C,
  parent?: Entity<any, any>,
  extra?: (self: InstanceType<C>) => void,
  created?: (self: InstanceType<C>) => void
) => {
  let oldAttribs: T[] = [];

  const findAttrib = (attribs: T[], id: Attrib["id"]) =>
    attribs.find((attrib) => attrib.id === id);

  const cache: { [key in Attrib["id"]]: InstanceType<C> } = {};
  const destory = (id: Attrib["id"]) => {
    const delEntity = cache[id];
    delEntity.destory();
    delete cache[id];
    return delEntity;
  };

  const add = (attrib: T) => {
    const addEntity = entityFactory(attrib, Type, parent, extra, created);
    cache[attrib.id] = addEntity;
    return addEntity;
  };

  return (attribsRaw: T | T[]) => {
    const attribs = Array.isArray(attribsRaw) ? attribsRaw : [attribsRaw];
    const { addPort, delPort, changePort } = getChangeAllPoart(
      attribs,
      oldAttribs
    );

    const dels = delPort.map(destory);
    const adds = addPort.map((id) => add(findAttrib(attribs, id)));

    const upds = changePort.map((id) => {
      const newAttrib = findAttrib(attribs, id);
      if (inRevise(newAttrib, cache[id].attrib)) {
        console.log("setAttrib");
        cache[id].setAttrib(findAttrib(attribs, id));
      }
      return cache[id];
    });

    oldAttribs = [...attribs];
    return {
      adds,
      dels,
      upds,
    };
  };
};

export type CopyProps<T extends Entity = Entity> = {
  entity: T;
  count?: number;
  dire?: number[];
  size: number[];
  factoryAttrib(pos: number[]): any;
};
export const copyEntityAttrib = <T extends Entity = Entity>(
  props: CopyProps<T>
) => {
  const count = props.count || 1;
  const dire = props.dire || [1, 0];
  const halfSize = props.size;
  const entity = props.entity;
  const start = entity.shape.getPosition();
  const unit = getDireDist(halfSize);
  const items = entity.container.getSameLevelData(entity) as Attrib[];

  for (let i = 0; i < count; i++) {
    const line = createLineByDire(dire, [start.x, start.y], unit * (i + 1));
    const newAttrib = {
      ...props.factoryAttrib([line[2], line[3]]),
      id: generateId(items),
    };
    items.push(newAttrib as any);
  }
};

const interrupts = new WeakMap<Container, () => void>();
export const addEntityAttrib = (
  container: Container,
  factoryAttrib: (pos: number[]) => any
) => {
  const oldInterrupt = interrupts.get(container);
  if (oldInterrupt) {
    oldInterrupt();
  }

  let finished = false;
  const finish = () => {
    if (finished) return;
    if (hasTouchEvents) {
      container.stage.off("touchend.addEntity");
    } else {
      container.stage.off("click.addEntity");
    }
    enableMouse();
    interrupts.delete(container);
    finished = true;
  };
  const complete = (data: any) => {
    finish();
    resolve(data);
  };
  const interrupt = () => {
    finish();
    reject("cancel");
  };

  let resolve: (data: any) => void, reject: (msg: string) => void;

  const promise = new Promise<any>((rs, rj) => {
    resolve = rs;
    reject = rj;

    const clickHandler = (ev: KonvaEventObject<any>) => {
      let offset = ev.evt;
      if (ev.evt instanceof TouchEvent) {
        offset = getTouchOffset(ev);
      }

      const pos = container.getRealFromStage([offset.offsetX, offset.offsetY]);
      complete(factoryAttrib(pos));
    };

    disableMouse();
    interrupts.set(container, interrupt);
    if (hasTouchEvents) {
      container.stage.on("touchend.addEntity", clickHandler);
    } else {
      container.stage.on("click.addEntity", clickHandler);
    }
  });

  return {
    promise,
    interrupt,
  };
};