import { SevenDayActivityInfo, SevenDayRewardItem, SevenDayRewardReceipt } from "./SevenDayGiftApi";
import SevenDayGiftReward from "./SevenDayGiftReward";

type ClaimHandler = (callback: (success: boolean) => void) => void;

export interface SevenDayGiftRuntimeView {
    playRewardEffect(items: SevenDayRewardItem[], day: number, done: () => void): void;
    setData(info: SevenDayActivityInfo, claimHandler: ClaimHandler): void;
    setCloseHandler(closeHandler: () => void): void;
    // 绑定正式领取回调，再展示活动。
    show(autoClaim?: boolean): void;
}

/** Bundle 内的正式业务逻辑，只处理活动领取、发奖和状态刷新。 */
export default class SevenDayGiftRuntime {
    private info: SevenDayActivityInfo = null;
    private claiming = false;
    private loadingSequence = 0;
    private loadingTimer: any = null;
    private loadingVisible = false;
    private disposed = false;

    constructor(private view: SevenDayGiftRuntimeView) { }

    // 接收主页传入的快照和关闭回调。
    public initialize(info: SevenDayActivityInfo, closeHandler: () => void) {
        if (this.disposed) return;
        this.view.setCloseHandler(closeHandler);
        if (info) this.updateInfo(info);
    }

    // 领取期间不覆盖正在使用的活动快照。
    public updateInfo(info: SevenDayActivityInfo) {
        if (this.disposed || this.claiming || !info) return;
        this.info = info;
        this.view.setData(this.info, this.claimReward.bind(this));
    }

    public show(autoClaim: boolean = false) {
        if (!this.info || this.disposed) return;
        this.view.setData(this.info, this.claimReward.bind(this));
        this.view.show(autoClaim);
    }

    // 销毁后忽略异步结果，并清理加载提示。
    public destroy() {
        if (this.disposed) return;
        this.disposed = true;
        this.closeHomeLoading(this.loadingSequence);
        this.claiming = false;
        this.info = null;
        this.view = null;
    }

    // 从当前查询快照生成奖励记录，同步成功后更新状态并播放效果。
    private claimReward(callback: (success: boolean) => void) {
        if (this.disposed || this.claiming || !this.info || !this.info.canClaim || this.info.todayClaimed) {
            callback(false);
            return;
        }
        const rewardDay = Number(this.info.nextRewardDay);
        const reward = Array.isArray(this.info.rewards)
            ? this.info.rewards.find(item => Number(item.day) === rewardDay) : null;
        if (!this.info.activityId || !this.info.startAt || !reward || reward.claimed || !Array.isArray(reward.items) || reward.items.length === 0) {
            cc.warn("[SevenDayGift] 活动查询没有返回可领取奖励");
            callback(false);
            return;
        }
        // 消费主页查询的快照，不再次请求活动接口。UID 由 Reward 加入本地防重键。
        const claimedCount = Math.max(Number(this.info.claimedCount) || 0, rewardDay);
        const receipt: SevenDayRewardReceipt = {
            claimId: JSON.stringify([this.info.activityId, this.info.startAt, rewardDay]),
            rewardDay,
            rewards: reward.items,
            claimedCount,
            todayClaimed: true,
            completed: claimedCount >= 7,
        };
        this.claiming = true;
        const loadingToken = this.openHomeLoading(7000);
        SevenDayGiftReward.grant(receipt, (success: boolean, message?: string) => {
            if (this.disposed) return;
            this.claiming = false;
            this.closeHomeLoading(loadingToken);
            if (!success) {
                cc.warn("[SevenDayGift] 奖励同步失败", message);
                callback(false);
                return;
            }
            this.applyClaimState(receipt.rewardDay, receipt.claimedCount, receipt.completed);
            this.view.playRewardEffect(receipt.rewards, receipt.rewardDay, () => {
                if (!this.disposed) callback(true);
            });
        });
    }

    // 本地标记当天已领，第七天领取后标记活动完成。
    private applyClaimState(rewardDay: number, claimedCount: number, completed: boolean) {
        if (!this.info) return;
        this.info.claimedCount = Number(claimedCount) || this.info.claimedCount;
        this.info.todayClaimed = true;
        this.info.canClaim = false;
        if (completed) this.info.status = "completed";
        if (Array.isArray(this.info.rewards)) {
            this.info.rewards.forEach(reward => {
                if (Number(reward.day) === Number(rewardDay)) reward.claimed = true;
            });
        }
        this.view.setData(this.info, this.claimReward.bind(this));
    }

    // 打开主页加载提示，设置超时以免一直遮挡。
    private openHomeLoading(timeoutMs: number): number {
        const token = ++this.loadingSequence;
        if (this.loadingTimer !== null) clearTimeout(this.loadingTimer);
        const home = this.getHomeController();
        if (home && typeof home.openLoad === "function") {
            this.loadingVisible = true;
            home.openLoad();
        }
        this.loadingTimer = setTimeout(() => this.closeHomeLoading(token), timeoutMs);
        return token;
    }

    // 仅关闭对应请求的提示，避免旧计时器干扰新请求。
    private closeHomeLoading(token: number) {
        if (token !== this.loadingSequence) return;
        if (this.loadingTimer !== null) {
            clearTimeout(this.loadingTimer);
            this.loadingTimer = null;
        }
        if (!this.loadingVisible) return;
        this.loadingVisible = false;
        const home = this.getHomeController();
        if (home && typeof home.closeLoad === "function") home.closeLoad();
    }

    // 通过主页组件调用现有加载提示。
    private getHomeController(): any {
        const canvas = cc.find("Canvas");
        return canvas && canvas.getComponent("JiaZai");
    }

}