import { BattlePhase } from 'db://assets/mx/module/battle';
import { createMechanismContext, type IBattleMechanism, type MechanismContext } from './IBattleMechanism';
import { createMechanismsForPlayIds, resolveMechanismConfig } from './MechanismRegistry';
import type { BattleRuntime } from '../runtime/BattleRuntime';

/** 战斗机制宿主：解析 new_play、驱动各 IBattleMechanism 生命周期 */
export class BattleMechanismHost {
    private _runtime: BattleRuntime | null = null;
    private _ctx: MechanismContext | null = null;
    private _mechanisms: IBattleMechanism[] = [];
    private _started = false;

    bind(runtime: BattleRuntime): void {
        this.unbind();
        this._runtime = runtime;
        this._ctx = createMechanismContext(runtime);
        gg.data.project.initChapterNewPlayInfo(runtime);
        const playIds = gg.data.project.newPlayIdArr ?? [];
        this._mechanisms = createMechanismsForPlayIds(playIds);
        for (const m of this._mechanisms) {
            const cfg = resolveMechanismConfig(m.typeId);
            if (cfg != null) {
                m.init(this._ctx, cfg);
            } else {
                console.error('[BattleMechanismHost] 机制配表缺失，未初始化', m.typeId);
            }
        }
    }

    tryStart(): void {
        if (this._started || !this._runtime?.Map) return;
        this._started = true;
    }

    tick(dt: number): void {
        if (!this._runtime?.Map) return;
        this.tryStart();
        if (!this._started || !this._ctx?.canTick()) return;
        const scaledDt = dt * this._ctx.timeScale;
        for (const m of this._mechanisms) {
            m.tick(scaledDt);
        }
    }

    onPhaseChanged(phase: BattlePhase): void {
        for (const m of this._mechanisms) {
            m.onPhaseChanged?.(phase);
        }
    }

    destroy(): void {
        for (const m of this._mechanisms) {
            m.destroy();
        }
        this._mechanisms = [];
        this._ctx = null;
        this._runtime = null;
        this._started = false;
    }

    unbind(): void {
        this.destroy();
    }
}