let allRotations = [];
let currentIndex = 0;
const ITEMS_PER_PAGE = 5;
let observer;

window.loadHeader(async function(headerContainer) {
    const stageButton = headerContainer.querySelector('.menu-item.stage');
    if (stageButton) {
        stageButton.classList.add('active');
    }

    const logoutForm = document.getElementById("logout-form");
    if (logoutForm) {
        logoutForm.action = "/api/v1/spfn/logout";
        const originInput = document.getElementById("logout_frontend_origin");
        if (originInput) originInput.value = window.location.origin;
        logoutForm.addEventListener('submit', () => {
            sessionStorage.removeItem('user_cache');
        });
    }

    const twitterBtn = document.getElementById('twitter-link-btn');
    const twitterLabel = document.getElementById('twitter-label-img');

    const handleTwitterAction = () => {
        const isLinked = twitterBtn.dataset.linked === "true";
        if (isLinked) {
            if (!confirm("Unlink Twitter account?")) return;
            fetch("/api/v1/me/twitter/unlink", { method: "POST", credentials: 'include' })
                .then(() => window.location.reload());
        } else {
            twitterBtn.style.opacity = "0.5";
            twitterBtn.style.pointerEvents = "none";
            fetch("/api/v1/me/twitter/link", { credentials: 'include' })
                .then(res => res.status === 401 ? (window.location.href = "/sign_in/") : res.json())
                .then(data => data?.url ? (window.location.href = data.url) : window.location.reload())
                .catch(() => window.location.reload());
        }
    };

    if (twitterBtn) {
        twitterBtn.addEventListener('click', handleTwitterAction);
    }

    const updateTwitterUI = () => {
        if (!twitterBtn || !twitterLabel) return;
        fetch("/api/v1/me/twitter/status", { credentials: 'include' })
            .then(res => res.ok ? res.json() : null)
            .then(data => {
                if (data && data.is_linked) {
                    twitterBtn.dataset.linked = "true";
                    twitterLabel.src = "/assets/en/svg/text/menu/tx_twitter_Cancel-34186e4e830964405f2528210d7278206d255bf40b69559babc36a7a041e0394.svg";
                    twitterLabel.alt = "Unlink Twitter";
                    twitterLabel.style.scale = "1.6";
                    twitterLabel.style.marginLeft = "30px";
                    twitterLabel.style.translate = "-10px -2px";
                } else {
                    twitterBtn.dataset.linked = "false";
                    twitterLabel.src = "/assets/en/svg/text/menu/tx_twitter-47ce083cc4514ab6aeb75b7dd9f71ce89ddc54a18d930d90cf4df62047413831.svg";
                    twitterLabel.alt = "Link Twitter";
                    twitterLabel.style.scale = "";
                    twitterLabel.style.marginLeft = "";
                    twitterLabel.style.translate = "";
                }
            })
            .catch(() => {
                twitterBtn.dataset.linked = "false";
            });
    };

    const extractMiiName = (miiDataB64) => {
        try {
            const binaryString = atob(miiDataB64.replace(/-/g, '+').replace(/_/g, '/'));
            const data = new Uint8Array(binaryString.length);
            for (let i = 0; i < binaryString.length; i++) {
                data[i] = binaryString.charCodeAt(i);
            }
            const size = data.length;
            let offset = -1;
            let isBE = false;
            if ([92, 96, 104, 106, 108, 336, 72].includes(size)) offset = 0x1A;
            else if ([74, 76].includes(size)) { offset = 0x02; isBE = true; }
            else if (size === 88) offset = 0x10;
            else if ([48, 68].includes(size)) offset = 0x1C;
            if (offset === -1) return null;
            const decoder = new TextDecoder(isBE ? 'utf-16be' : 'utf-16le');
            let end = offset;
            while (end < offset + 20 && end + 1 < data.length && (data[end] !== 0 || data[end + 1] !== 0)) {
                end += 2;
            }
            return decoder.decode(data.slice(offset, end));
        } catch (e) {
            return null;
        }
    };

    const renderData = async (data) => {
        if (!data) return;
        if (typeof data === 'string') {
            try { data = JSON.parse(data); } catch (e) { console.error(e); }
        }
        const nameEl = document.getElementById('mii-name');
        const imgEl = document.getElementById('mii-img');
        const miiBlob = (data.mii && data.mii.data) || data.mii_data;

        if (nameEl) {
            const parsedName = miiBlob ? extractMiiName(miiBlob) : null;
            nameEl.textContent = parsedName || (data.mii && data.mii.name) || data.nickname || data.user_id || data.username || "Loading...";
        }
        
        if (imgEl && miiBlob) {
            imgEl.src = `https://mii-renderer.spfn.net/miis/image.png?data=${encodeURIComponent(miiBlob)}&type=face&width=270`;
            imgEl.style.display = 'block';
        }
        updateTwitterUI();
    };

    const init = async () => {
        const overlay = document.getElementById("loading-overlay");
        let cacheReady = false;

        const cached = sessionStorage.getItem('user_cache');
        if (cached) {
            try {
                await renderData(cached);
                cacheReady = true;
            } catch (e) {}
        }

        try {
            const [profileRes] = await Promise.all([
                fetch("/api/v1/me", { credentials: 'include' }).then(res => {
                    if (res.redirected) {
                        window.location.href = res.url;
                        return {};
                    }
                    return res.ok ? res.json() : {};
                }),
                renderStages()
            ]);
            
            if (profileRes && Object.keys(profileRes).length > 0) {
                await renderData(profileRes);
                sessionStorage.setItem('user_cache', JSON.stringify(profileRes));
            }
        } catch (err) {
            if (!cacheReady) {
                const nameEl = document.getElementById('mii-name');
                if (nameEl) nameEl.textContent = "Guest";
            }
            console.error(err);
        } finally {
            if (overlay) overlay.style.display = "none";
        }
    };

    init();
});

const API_URL = "/api/v1/boss";

function stageNames(stages, lang = "en-US") {
    return stages.map(s => s.translatedNames[lang]);
}

function getStageClass(stageName) {
  const name = stageName.toLowerCase();
  if (name.includes("ancho-v")) return "sprite-ancho-v";
  if (name.includes("arowana")) return "sprite-arowana";
  if (name.includes("blackbelly")) return "sprite-blackbelly";
  if (name.includes("bluefin")) return "sprite-bluefin";
  if (name.includes("camp")) return "sprite-camp";
  if (name.includes("flounder")) return "sprite-flounder";
  if (name.includes("hammerhead")) return "sprite-hammerhead";
  if (name.includes("kelp")) return "sprite-kelp";
  if (name.includes("mahi-mahi")) return "sprite-mahi-mahi";
  if (name.includes("moray")) return "sprite-moray";
  if (name.includes("museum")) return "sprite-museum";
  if (name.includes("piranha")) return "sprite-piranha";
  if (name.includes("port")) return "sprite-port";
  if (name.includes("saltspray")) return "sprite-saltspray";
  if (name.includes("urchin")) return "sprite-urchin";
  if (name.includes("walleye")) return "sprite-walleye";
  return "sprite";
}

async function fetchRotations() {
  try {
    const res = await fetch(API_URL);
    if (!res.ok) throw new Error(`HTTP error! status: ${res.status}`);
    const data = await res.json();
    const now = new Date();

    const fest = data?.splatfestivalSplatfest;
    let currentFest = null;

    if (fest && fest.stages && fest.stages.length > 0) {
        const festStart = new Date(fest.time.start * 1000);
        const festEnd = new Date(fest.time.end * 1000);
        
        if (now >= festStart && now <= festEnd) {
            currentFest = {
                isFest: true,
                turf: stageNames(fest.stages),
                startTime: festStart, 
                endTime: festEnd,
                isExpired: false
            };
        }
    }

    if (currentFest) {
        return [currentFest];
    }

    const rotations = data?.pretendo?.rotations ?? {};
    
    let standardRotations = Object.keys(rotations).map(ts => {
      const start = new Date(Number(ts));
      const r = rotations[ts];
      const end = new Date(start.getTime() + (r.duration * 60 * 60 * 1000));
      
      return {
        isFest: false,
        turf: stageNames(r.turfStages),
        ranked: stageNames(r.rankedStages),
        ranked_mode: r.rankedMode.replace(/([a-z])([A-Z])/g, "$1 $2"),
        startTime: start,
        endTime: end,
        isExpired: end < now
      };
    });

    const active = standardRotations.filter(r => !r.isExpired).sort((a, b) => a.startTime - b.startTime);
    const past = standardRotations.filter(r => r.isExpired).sort((a, b) => b.startTime - a.startTime);
    
    return [...active, ...past];
  } catch (error) {
    console.error(error);
    return [];
  }
}

async function renderStages() {
    const container = document.getElementById("stages-container");
    try {
        allRotations = await fetchRotations();
        if (!allRotations.length) {
            container.innerHTML = `<h2 class="error-message">Something went wrong! Try reloading the page.</h2>`;
            return;
        }
        container.innerHTML = "";
        const trigger = document.createElement('div');
        trigger.id = 'scroll-trigger';
        trigger.style.height = '10px';
        trigger.style.display = 'none';
        container.after(trigger);
        loadMore(true);
        observer = new IntersectionObserver((entries) => {
            if (entries.isIntersecting && currentIndex > 0 && currentIndex < allRotations.length) {
                loadMore(false);
            }
        }, { rootMargin: '0px 0px 100px 0px' });
        observer.observe(trigger);
    } catch (err) {
        console.error(err);
    }
}

function loadMore(isInitial) {
    const container = document.getElementById("stages-container");
    const loadingOverlay = document.getElementById("loading-overlay");
    const trigger = document.getElementById('scroll-trigger');

    if (!isInitial && loadingOverlay) {
        loadingOverlay.style.display = 'flex';
        if (typeof window.animateLoadingCanvas === 'function') window.animateLoadingCanvas();
    }

    const waitTime = isInitial ? 0 : 800;

    setTimeout(() => {
        const nextBatch = allRotations.slice(currentIndex, currentIndex + ITEMS_PER_PAGE);
        const now = new Date();
        let html = "";
        
        nextBatch.forEach((rotation, index) => {
            const isFirstItem = isInitial && index === 0;
            const optionsDate = { day: "2-digit", month: "2-digit", year: "numeric" };
            const optionsTime = { hour: "numeric", minute: "2-digit", hour12: true };
            const timeZone = "Europe/Paris";
            
            const startDay = rotation.startTime.toLocaleDateString("en-GB", { ...optionsDate, timeZone });
            const startTime = rotation.startTime.toLocaleTimeString("en-GB", { ...optionsTime, timeZone }).toLowerCase();
            const endDay = rotation.endTime.toLocaleDateString("en-GB", { ...optionsDate, timeZone });
            const endTime = rotation.endTime.toLocaleTimeString("en-GB", { ...optionsTime, timeZone }).toLowerCase();

            const formattedTime = `${startDay} at ${startTime} (CEST) ~ ${endDay} at ${endTime} (CEST)`;
            
            if (rotation.isFest) {
                html += `
                    <div class="splatfest-banner-container">
                        <img class="its-splatfest-time" src="/assets/en/ui/Splatnet_its_splatfest_time!.png" alt="Its Splatfest Time!">
                    </div>
                    <div class="rotation-time">${formattedTime}</div>
                    <div class="stages-section">
                        <div class="mode-header">
                            <img class="mode-title" src="/assets/en/svg/ui/ico_stage_fes-d2041f3d0fc360ad6c7c00dc4f5bfd1aa626a251d35af88c076b5498d8eb991d.svg" alt="Splatfest">
                            <div class="mode-text"><img src="/assets/en/svg/text/scene/stage/tx_fesmatch-2cee60cbe41a1594b8d5ef867138f99d843cfce6efe0c490a41632b2e99ec685.svg" alt="Splatfest Battle"></div>
                        </div>
                        <div class="stages">
                            ${rotation.turf.map(name => `
                                <div class="stage-item">
                                    <div class="sprite ${getStageClass(name)}"></div>
                                    <div class="stage-title">${name}</div>
                                </div>
                            `).join("")}
                        </div>
                    </div>
                `;
            } else {
                if (isFirstItem) {
                    const isAboutToExpire = !rotation.isExpired && (rotation.endTime - now) < (15 * 60 * 1000);
                    if (isAboutToExpire) {
                        html += `<div class="expiring-warning" style="background: #ffcc00; color: #000; padding: 12px; text-align: center; font-weight: bold; border-radius: 8px; margin-bottom: 20px;">NOTICE: This rotation is about to expire!</div>`;
                    } else if (rotation.isExpired) {
                        html += `<div class="expiring-warning" style="background: #ff4444; color: #fff; padding: 12px; text-align: center; font-weight: bold; border-radius: 8px; margin-bottom: 20px;">NOTICE: This rotation has expired!</div>`;
                    }
                }

                html += `
                    <div class="rotation-time">${formattedTime}</div>
                    <div class="stages-section">
                        <div class="mode-header">
                            <img class="mode-title" src="/assets/en/svg/ui/ico_stage_regular-54557ab86d0cba16cf002e6d299f87dccb41655de8a171d32928bfebda3f3692.svg" alt="Regular Battle">
                            <div class="mode-text"><img src="/assets/en/svg/text/scene/stage/tx_regularmatch-2cee60cbe41a1594b8d5ef867138f99d843cfce6efe0c490a41632b2e99ec685.svg" alt="Regular Battle"></div>
                        </div>
                        <div class="stages">
                            ${rotation.turf.map(name => `
                                <div class="stage-item">
                                    <div class="sprite ${getStageClass(name)}"></div>
                                    <div class="stage-title">${name}</div>
                                </div>
                            `).join("")}
                        </div>
                    </div>
                    <div class="stages-section">
                        <div class="mode-header">
                            <img class="mode-title" src="/assets/en/svg/ui/ico_stage_gachi-d2041f3d0fc360ad6c7c00dc4f5bfd1aa626a251d35af88c076b5498d8eb991d.svg" alt="Ranked Battle">
                            <div class="mode-text"><img src="/assets/en/svg/text/scene/stage/tx_gachimatch-08a066c73d4dcf466c435be611b996ffd7930d19d9a6a865b712cd5dd802534f.svg" alt="Ranked Battle"></div>
                        </div>
                        <div class="ranked-mode-labels">
                            <div class="battle-mode-text"><img src="/assets/en/svg/text/scene/stage/tx_rule-76cf0777fb715a9478f8b579512541f3f14ed834566e0b6e153834a57d726021.svg" alt="Battle Mode"></div>
                            <div class="ranked-mode-text">${rotation.ranked_mode}</div>
                        </div>
                        <div class="stages">
                            ${rotation.ranked.map(name => `
                                <div class="stage-item">
                                    <div class="sprite ${getStageClass(name)}"></div>
                                    <div class="stage-title">${name}</div>
                                </div>
                            `).join("")}
                        </div>
                    </div>
                `;
            }
        });

        container.insertAdjacentHTML('beforeend', html);
        currentIndex += nextBatch.length;
        if (!isInitial && loadingOverlay) loadingOverlay.style.display = 'none';
        if (trigger) trigger.style.display = 'block';
        if (currentIndex >= allRotations.length && trigger) trigger.remove();
    }, waitTime);
}