import { ChapterNewPlayTypeEnum } from '../../../game/ChapterPlayTypes';
import type { IBattleMechanism, MechanismContext } from '../IBattleMechanism';
import {
    pickRandomDigGrid,
    pickRandomSpiderWebTarget,
    playSpiderSpiritVisual,
} from '../MechanismServices';

/** 蜘蛛精 / 蛛网机制（Playmode 12） */
export class SpiderSpiritMechanism implements IBattleMechanism {
    readonly typeId = ChapterNewPlayTypeEnum.VinesGrass;

    private _ctx: MechanismContext | null = null;
    private _timeArr: number[] = [];
    private _eventIndex = 0;
    private _checkTimer = 0;
    private _visualPlaying = false;

    init(ctx: MechanismContext, config: unknown): void {
        this._ctx = ctx;
        const src = config as number[] | undefined;
        this._timeArr = src?.slice() ?? [];
        this._eventIndex = 0;
        this._checkTimer = 0;
        this._visualPlaying = false;
        if (!this._timeArr.length) {
            console.error('[SpiderSpiritMechanism] 配表 timeArr 为空，机制不会触发');
            return;
        }
    }

    tick(dt: number): void {
        if (!this._ctx) return;

        this._checkTimer += dt;
        if (this._checkTimer < 1) return;
        this._checkTimer = 0;
        this._tryTriggerDueEvents();
    }

    destroy(): void {
        this._visualPlaying = false;
        this._ctx = null;
        this._timeArr = [];
        this._eventIndex = 0;
    }

    private _tryTriggerDueEvents(): void {
        const ctx = this._ctx;
        if (!ctx || this._visualPlaying) return;

        while (this._eventIndex < this._timeArr.length && ctx.battleTime >= this._timeArr[this._eventIndex]) {
            if (!this._tryTriggerOnce()) break;
            this._eventIndex++;
            break;
        }
    }

    private _tryTriggerOnce(): boolean {
        const ctx = this._ctx;
        if (!ctx) return false;

        const appearGrid = pickRandomDigGrid(ctx);
        if (!appearGrid) {
            console.log(
                '[SpiderSpiritMechanism] 无可开挖出现落点，event=',
                this._eventIndex,
                'battleTime=',
                ctx.battleTime,
            );
            return false;
        }

        const targetGrid = pickRandomSpiderWebTarget(ctx);
        if (!targetGrid) {
            console.log(
                '[SpiderSpiritMechanism] 无可用吐丝目标，event=',
                this._eventIndex,
                'battleTime=',
                ctx.battleTime,
            );
            return false;
        }

        this._visualPlaying = true;
        const started = playSpiderSpiritVisual(ctx, appearGrid, targetGrid, () => {
            this._visualPlaying = false;
        });
        if (!started) {
            this._visualPlaying = false;
            console.log('[SpiderSpiritMechanism] 蜘蛛精表现创建失败，event=', this._eventIndex);
            return false;
        }
        return true;
    }
}