import { arrayRemoveIf } from "../../Common/ArrayExt";
import { Sleep } from "../../Common/Sleep";
import { clipperCpp } from "../Common/ClipperCpp";
import { Individual } from "./Individual";
import { NestCache } from "./NestCache";
import { Part } from "./Part";
import { Path } from "./Path";

/**
 * 优化器
 * 配置优化器
 * 放入零件
 * 按下启动
 * 按下暂停
 * 清理机台
 */
export class OptimizeMachine
{
    //配置
    Config: {
        PopulationCount: number;//种群个数
    };
    //容器板
    Bin: Path;
    //机台上的零件
    Parts: Part[];
    private _IsSuspend = false;

    protected _Individuals: Individual[];

    constructor()
    {
        this.Config = { PopulationCount: 50 };
    }

    //放入零件
    PutParts(parts: Part[])
    {
        if (globalThis.document) parts = parts.slice();
        arrayRemoveIf(parts, p => p.RotatedStates.length === 0);
        this.Parts = parts;
    }

    callBack: (i: Individual) => Promise<void>;

    //启动
    async Start()
    {
        if (this.Parts.length === 0) return;
        console.log(this.Parts.length);
        this._IsSuspend = false;
        NestCache.Clear();
        this.Parts.sort((p1, p2) => p2.State.Contour.Area - p1.State.Contour.Area);
        this._Individuals = [new Individual(this.Parts, 0.8)];
        for (let i = 1; i < this.Config.PopulationCount; i++)
        {
            let parts = this.Parts.map(p => p.Clone());
            if (i < 3)
            {
                for (let i = parts.length - 1; i > 0; i--)
                {
                    const j = Math.floor(Math.random() * (i + 1));
                    [parts[i], parts[j]] = [parts[j], parts[i]];
                    parts[i].Mutate();
                }
            }
            this._Individuals.push(new Individual(parts, 0.8));
        }
        //2.执行
        await this.Run();
    }

    calcCount = 0;
    best = Infinity;
    bestP: Individual;
    bestCount = 0;
    private async Run()
    {
        console.time("1");
        if (this.Parts.length === 0) return;
        //开始自然选择
        while (!this._IsSuspend) //实验停止信号
        {
            let goBack = this.calcCount - this.bestCount > 8000;
            //1.适应环境(放置零件)
            for (let i = 0; i < this._Individuals.length; i++)
            {
                if (globalThis.document || !clipperCpp.lib)
                    await Sleep(0);
                let p = this._Individuals[i];
                if (this.calcCount < 1000 || this.calcCount % 1000 === 0)
                    p.Evaluate(this.Bin, this.best, true, i % 2);
                else
                    p.Evaluate(this.Bin, this.best);

                if (!this.bestP || p.Fitness < this.bestP.Fitness)
                {
                    this.bestP = p;
                    this.best = p.Fitness;
                    await this.callBack(p);
                }
                if (goBack)
                    p.mutationRate = 0.5;
            }

            this.calcCount += this._Individuals.length;
            if (this.calcCount % 100 === 0)
            {
                console.timeLog("1", this.bestP.Fitness, this.calcCount, NestCache.count1, NestCache.count2);
                await Sleep(0);
            }

            this._Individuals.sort((i1, i2) => i1.Fitness - i2.Fitness);
            let bestP = this._Individuals[0];
            // //回调最好的
            // if (bestP.Fitness < this.best)
            // {
            //     this.best = bestP.Fitness;
            //     this.bestP = bestP;
            //     // console.timeLog("1", this.best, this.calcCount, NestCache.count1, NestCache.count2);
            //     if (this.callBack)
            //         await this.callBack(bestP);
            // }

            //自然选择
            this._Individuals.splice(-10);//杀死它
            for (let i = 0; i < 4; i++)
                this._Individuals.push(bestP.Clone());
            this._Individuals.push(this.bestP.Clone());
            for (let i = 0; i < 3; i++)
                this._Individuals.push(this._Individuals[1].Clone());
            for (let i = 0; i < 2; i++)
                this._Individuals.push(this._Individuals[2].Clone());
            //全部突变
            for (let p of this._Individuals)
            {
                if (p.Fitness !== undefined)
                    p.Mutate();
            }
        }
    }
    //暂停
    Suspend()
    {
        console.timeEnd("1");
        console.log(this.best, this.calcCount, NestCache.count1);
        this._IsSuspend = true;
        console.log("暂停");
    }
    //继续
    Continue()
    {
        this._IsSuspend = false;
        this.Run();
    }
    //清理机台
    Clear()
    {
    }
}