(function () {
    var ASSET_BASE = './assets/recharge-activity/';
    var viewport = document.getElementById('appViewport');
    var rewardSections = document.getElementById('rewardSections');
    var countNodes = {
        days: document.querySelector('[data-count="days"]'),
        hours: document.querySelector('[data-count="hours"]'),
        minutes: document.querySelector('[data-count="minutes"]'),
        seconds: document.querySelector('[data-count="seconds"]'),
    };

    var DESIGN_WIDTH = 1080;
    var DESIGN_HEIGHT = 3273;
    var VIEWPORT_WIDTH = 375;
    var countdownEndAt = resolveCountdownEndAt();
    var activityData = {
        user: {
            name: 'nanfangjian',
            id: '12345678',
            avatar: ASSET_BASE + 'profile-avatar.png',
            accumulatedRecharge: '5998',
        },
        rewards: [
            {
                amount: '$100',
                top: 1776,
                background: ASSET_BASE + 'reward-section-a.png',
                claim: { text: 'Receive', claimable: true, claimed: false },
                cards: [
                    { price: '$100', icon: ASSET_BASE + 'reward-icon.png', left: 111, top: 293 },
                    { price: '$100', icon: ASSET_BASE + 'reward-icon.png', left: 560, top: 293 },
                ],
            },
            {
                amount: '$100',
                top: 2466,
                background: ASSET_BASE + 'reward-section-b.png',
                claim: { text: 'Receive', claimable: true, claimed: false },
                cards: [
                    { price: '$100', icon: ASSET_BASE + 'reward-icon.png', left: 70.5, top: 278 },
                    { price: '$100', icon: ASSET_BASE + 'reward-icon.png', left: 339.5, top: 278 },
                    { price: '$100', icon: ASSET_BASE + 'reward-icon.png', left: 608.5, top: 278 },
                ],
            },
        ],
    };

    function getParams() {
        return new URLSearchParams(window.location.search || '');
    }

    function t(key, fallback) {
        return window.HyAppI18n && window.HyAppI18n.t
            ? window.HyAppI18n.t(key, fallback)
            : fallback || key;
    }

    function escapeHTML(value) {
        return String(value || '')
            .replace(/&/g, '&')
            .replace(/</g, '&lt;')
            .replace(/>/g, '&gt;')
            .replace(/"/g, '&quot;')
            .replace(/'/g, '&#39;');
    }

    function twoDigits(value) {
        return String(Math.max(0, value)).padStart(2, '0');
    }

    function resolveCountdownEndAt() {
        var params = getParams();
        var explicitEnd = Date.parse(params.get('end_at') || params.get('endAt') || '');
        if (Number.isFinite(explicitEnd) && explicitEnd > Date.now()) return explicitEnd;

        var hours = Number(params.get('hours'));
        if (Number.isFinite(hours) && hours > 0) return Date.now() + hours * 60 * 60 * 1000;

        // This page is intentionally interface-free for now; when an API is added,
        // use the server period end time here and do not recover failed requests with mock data.
        return Date.now() + 25 * 60 * 60 * 1000 + 61 * 1000;
    }

    function updateScale() {
        var scale = Math.min(window.innerWidth / VIEWPORT_WIDTH, 1);
        var scaledHeight = Math.ceil(DESIGN_HEIGHT * (VIEWPORT_WIDTH / DESIGN_WIDTH));

        document.documentElement.style.setProperty('--app-scale', String(scale));
        viewport.style.minHeight = scaledHeight + 'px';
        document.body.style.minHeight = Math.ceil(scaledHeight * scale) + 'px';
    }

    function updateCountdown() {
        var diff = Math.max(0, countdownEndAt - Date.now());
        var totalSeconds = Math.floor(diff / 1000);
        var days = Math.floor(totalSeconds / 86400);
        var hours = Math.floor((totalSeconds % 86400) / 3600);
        var minutes = Math.floor((totalSeconds % 3600) / 60);
        var seconds = totalSeconds % 60;

        countNodes.days.textContent = twoDigits(days);
        countNodes.hours.textContent = twoDigits(hours);
        countNodes.minutes.textContent = twoDigits(minutes);
        countNodes.seconds.textContent = twoDigits(seconds);
    }

    function renderProfile(user) {
        document.querySelector('[data-profile-avatar]').src = user.avatar;
        document.querySelector('[data-profile-name]').textContent = user.name;
        document.querySelector('[data-profile-id]').textContent =
            t('rechargeReward.idPrefix', 'ID:') + ' ' + user.id;
        document.querySelector('[data-profile-recharge]').textContent =
            t('rechargeReward.accumulatedRecharge', 'Accumlated Recharge:') +
            user.accumulatedRecharge;
    }

    function renderRewardCard(card) {
        return [
            '<div class="reward-card" style="left:',
            card.left,
            'px;top:',
            card.top,
            'px">',
            '<img class="reward-frame" src="',
            ASSET_BASE,
            'reward-card-frame.png',
            '" alt="" />',
            '<img class="reward-icon" src="',
            escapeHTML(card.icon),
            '" alt="" />',
            '<span class="reward-price">',
            escapeHTML(card.price),
            '</span>',
            '</div>',
        ].join('');
    }

    function renderClaimButton(claim) {
        var stateClass = claim.claimed ? ' is-claimed' : claim.claimable ? ' is-claimable' : ' is-disabled';
        return [
            '<button class="claim-button',
            stateClass,
            '" type="button"',
            claim.claimable && !claim.claimed ? '' : ' disabled',
            '>',
            '<img class="claim-button-bg" src="',
            ASSET_BASE,
            'receive-button-bg.png" alt="" />',
            '<span>',
            escapeHTML(claim.text || 'Receive'),
            '</span>',
            '</button>',
        ].join('');
    }

    function renderRewards(rewards) {
        rewardSections.innerHTML = rewards
            .map(function (section) {
                var title = t('rechargeReward.rechargeTitle', 'Recharge {amount}').replace(
                    '{amount}',
                    section.amount
                );
                return [
                    '<section class="reward-section" style="--section-top:',
                    section.top,
                    'px">',
                    '<img class="reward-section-bg" src="',
                    escapeHTML(section.background),
                    '" alt="" />',
                    '<div class="title-pill">',
                    '<span>',
                    escapeHTML(title),
                    '</span>',
                    '</div>',
                    section.cards
                        .map(function (card) {
                            return renderRewardCard(card);
                        })
                        .join(''),
                    renderClaimButton(section.claim || { text: 'Receive', claimable: false }),
                    '</section>',
                ].join('');
            })
            .join('');
    }

    function renderPage() {
        document.title = t('rechargeReward.pageTitle', 'Recharge Reward');
        renderProfile(activityData.user);
        renderRewards(activityData.rewards);
    }

    function init() {
        updateScale();
        updateCountdown();
        renderPage();

        window.setInterval(updateCountdown, 1000);
        window.addEventListener('resize', updateScale);
        window.addEventListener('hyapp:i18n-ready', renderPage);
    }

    init();
})();