import { PASS_PERIOD } from './BattlePassModel';

/** Memory-only login cache; scene destruction must not reset a completed check. */
export default class BattlePassSettlementCheck {
    private static player: any;
    private static identity = '';
    private static current: BattlePassSettlementCheck;

    static forPlayer(player: any): BattlePassSettlementCheck {
        const identity = String(player.uid || '') + ':' + String(player.token || '');
        if (this.player !== player || this.identity !== identity || !this.current) {
            this.player = player;
            this.identity = identity;
            this.current = new BattlePassSettlementCheck();
        }
        return this.current;
    }

    static resetLogin() { this.current = null; }

    private periodEnd = 0;
    private checkedAt = 0;
    private checkedVersion = -1;
    private offset = 0;
    version = 0;
    readonly reviewOrders = new Set<string>();

    hasSchedule(): boolean { return this.periodEnd > 0; }

    observeStart(start: number) {
        if (Number.isFinite(start) && start > 0) this.periodEnd = start + PASS_PERIOD;
    }

    syncClock(serverTime: number) {
        if (Number.isFinite(serverTime) && serverTime > 0) this.offset = serverTime - Date.now();
    }

    invalidate() { this.version++; }

    needsCheck(orders: any[] = []): boolean {
        if (orders.some(order => /^battlepass(?:_30|_12)?$/.test(order.itemid) && !this.reviewOrders.has(order.outTradeNo))) return true;
        if (!this.checkedAt || this.checkedVersion !== this.version) return true;
        if (!this.periodEnd) return false;
        // Derive the first boundary after the last read, even if another API has
        // already advanced the global season while we were in GameScene.
        const nextEnd = this.periodEnd + (Math.floor((this.checkedAt - this.periodEnd) / PASS_PERIOD) + 1) * PASS_PERIOD;
        return Date.now() + this.offset >= nextEnd;
    }

    complete(serverTime: number, version: number) {
        this.checkedAt = serverTime;
        this.checkedVersion = version;
    }
}