// dashboard.js
// Full functionality: populate, start status loops, load members, drag & drop between lists and groups,
// drop zones accept only friendly/enemy respectively, status color updates.

// ---- In-memory maps ----
const friendlyMembers = new Map(); // id -> member object
const enemyMembers = new Map();

// ---- DOM containers ----
const friendlyContainer = document.getElementById("friendly-container");
const enemyContainer = document.getElementById("enemy-container");

// utility to safe parse ints
function toInt(v) { const n = Number(v); return Number.isNaN(n) ? null : n; }

// ---- Create structured card ----
function createMemberCard(member, kind) {
    // member: { id, name, level, estimate, status }
    // kind: "friendly" or "enemy" (for ARIA / dataset)
    const card = document.createElement("div");
    card.classList.add("member-card");
    card.classList.add(kind);
    card.setAttribute("draggable", "true");
    card.dataset.id = member.id;
    card.dataset.kind = kind;

    // structured children
    const nameDiv = document.createElement("div");
    nameDiv.className = "name";
    nameDiv.textContent = member.name;

    const statsDiv = document.createElement("div");
    statsDiv.className = "stats";
    statsDiv.innerHTML = `Lv: ${member.level} <br> Est: ${member.estimate} <br> Status: <span class="status-text">${member.status || "Unknown"}</span>`;

    card.appendChild(nameDiv);
    card.appendChild(statsDiv);

    // store back-reference
    member.domElement = card;

    // drag events: encode type and id in dataTransfer
    card.addEventListener("dragstart", (e) => {
        const payload = JSON.stringify({ kind, id: member.id });
        e.dataTransfer.setData("text/plain", payload);
        // visual
        card.style.opacity = "0.5";
    });
    card.addEventListener("dragend", () => {
        card.style.opacity = "1";
    });

    // initial color
    applyStatusClass(member);

    return card;
}

// ---- Apply status CSS class to the .status-text inside a member card ----
function applyStatusClass(member) {
    const span = member.domElement?.querySelector(".status-text");
    if (!span) return;
    span.classList.remove("status-ok", "status-traveling", "status-hospitalized");
    const s = String(member.status || "").toLowerCase();
    if (s === "okay") span.classList.add("status-ok");
    else if (s === "traveling" || s === "abroad") span.classList.add("status-traveling");
    else if (s === "hospitalized" || s === "hospital") span.classList.add("status-hospitalized");
}

// ---- Load static members from backend into the list containers ----
async function loadMembers(faction) {
    const url = faction === "friendly" ? "/api/friendly_members" : "/api/enemy_members";
    try {
        const res = await fetch(url, { cache: "no-store" });
        if (!res.ok) {
            console.error("Failed to fetch members:", res.status);
            return;
        }
        const arr = await res.json();
        const container = faction === "friendly" ? friendlyContainer : enemyContainer;
        const map = faction === "friendly" ? friendlyMembers : enemyMembers;

        // clear
        container.innerHTML = "";
        map.clear();

        arr.forEach(m => {
            if (!m.status) m.status = "Unknown";
            const card = createMemberCard(m, faction);
            map.set(m.id, m);
            container.appendChild(card);
        });
    } catch (err) {
        console.error("loadMembers error", err);
    }
}

// ---- Refresh status map and update DOM (does not touch static info or position) ----
async function refreshStatus(faction) {
    const url = faction === "friendly" ? "/api/friendly_status" : "/api/enemy_status";
    const map = faction === "friendly" ? friendlyMembers : enemyMembers;
    try {
        const res = await fetch(url, { cache: "no-store" });
        if (!res.ok) {
            console.warn("Status fetch failed:", res.status);
            return;
        }
        const statusData = await res.json(); // { id: { status: "..."}, ... }
        Object.keys(statusData).forEach(k => {
            const id = parseInt(k);
            const member = map.get(id);
            if (!member) return; // not loaded yet or moved elsewhere
            member.status = statusData[k].status;
            const span = member.domElement.querySelector(".status-text");
            span.textContent = member.status;
            applyStatusClass(member);
        });
    } catch (err) {
        console.error("refreshStatus error", err);
    }
}

// ---- Populate endpoints: call backend to fetch static info (FFScouter) once ----
async function populateFriendly() {
    const id = toInt(document.getElementById("friendly-id").value);
    if (!id) return alert("Enter friendly faction ID");
    await fetch("/api/populate_friendly", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ faction_id: id, interval: 0 })
    });
    await loadMembers("friendly");
}

async function populateEnemy() {
    const id = toInt(document.getElementById("enemy-id").value);
    if (!id) return alert("Enter enemy faction ID");
    await fetch("/api/populate_enemy", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ faction_id: id, interval: 0 })
    });
    await loadMembers("enemy");
}

// ---- Start status refresh loops on backend and JS-side polling ----
let friendlyStatusIntervalHandle = null;
let enemyStatusIntervalHandle = null;

async function startFriendlyStatus() {
    const id = toInt(document.getElementById("friendly-id").value);
    const interval = Math.max(1, toInt(document.getElementById("refresh-interval").value) || 10);
    if (!id) return alert("Enter friendly faction ID");

    await fetch("/api/start_friendly_status", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ faction_id: id, interval })
    });

    // clear existing
    if (friendlyStatusIntervalHandle) clearInterval(friendlyStatusIntervalHandle);
    friendlyStatusIntervalHandle = setInterval(() => refreshStatus("friendly"), interval * 1000);
    // immediate
    refreshStatus("friendly");
}

async function startEnemyStatus() {
    const id = toInt(document.getElementById("enemy-id").value);
    const interval = Math.max(1, toInt(document.getElementById("refresh-interval").value) || 10);
    if (!id) return alert("Enter enemy faction ID");

    await fetch("/api/start_enemy_status", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ faction_id: id, interval })
    });

    if (enemyStatusIntervalHandle) clearInterval(enemyStatusIntervalHandle);
    enemyStatusIntervalHandle = setInterval(() => refreshStatus("enemy"), interval * 1000);
    refreshStatus("enemy");
}

// ---- Drag & drop handling for drop-zones ----
function setupDropZones() {
    const dropZones = document.querySelectorAll(".drop-zone, .member-list");

    dropZones.forEach(zone => {
        zone.addEventListener("dragover", (e) => {
            e.preventDefault();
            // peek at payload to determine if valid
            const raw = e.dataTransfer.types.includes("text/plain") ? e.dataTransfer.getData("text/plain") : null;
            let valid = false;
            if (raw) {
                try {
                    const p = JSON.parse(raw);
                    const kind = p.kind;
                    const zoneType = zone.classList.contains("friendly-zone") || zone.id.includes("friendly") ? "friendly" :
                                     zone.classList.contains("enemy-zone") || zone.id.includes("enemy") ? "enemy" : null;
                    if (zoneType && kind === zoneType) valid = true;
                } catch {}
            }
            zone.classList.toggle("dragover-valid", valid);
            zone.classList.toggle("dragover-invalid", !valid);
        });

        zone.addEventListener("dragleave", () => {
            zone.classList.remove("dragover-valid", "dragover-invalid");
        });

        zone.addEventListener("drop", (e) => {
            e.preventDefault();
            zone.classList.remove("dragover-valid", "dragover-invalid");
            const raw = e.dataTransfer.getData("text/plain");
            if (!raw) return;
            let payload;
            try { payload = JSON.parse(raw); } catch { return; }
            const { kind, id } = payload;
            const idn = parseInt(id);
            if (!kind || !idn) return;

            // Determine target zone type (friendly or enemy) for validation
            const zoneType = zone.classList.contains("friendly-zone") || zone.id.includes("friendly") ? "friendly" :
                             zone.classList.contains("enemy-zone") || zone.id.includes("enemy") ? "enemy" : null;
            if (zoneType !== kind) {
                // invalid drop
                return;
            }

            // Get member object from maps
            const map = kind === "friendly" ? friendlyMembers : enemyMembers;
            const member = map.get(idn);
            if (!member) return;

            // Remove from original parent if exists (so it moves)
            const prev = member.domElement?.parentElement;
            if (prev && prev !== zone) prev.removeChild(member.domElement);

            // Append to target zone
            zone.appendChild(member.domElement);
        });
    });
}

// ---- Allow clicking a card to log for debug (optional) ----
function attachCardClickLogging() {
    document.addEventListener("click", (e) => {
        const el = e.target.closest(".member-card");
        if (!el) return;
        const id = parseInt(el.dataset.id);
        const kind = el.dataset.kind;
        const map = kind === "friendly" ? friendlyMembers : enemyMembers;
        const member = map.get(id);
        if (member) console.log("Member clicked:", member);
    });
}

// ---- Initialize UI wiring ----
function wireUp() {
    document.getElementById("friendly-populate-btn").addEventListener("click", populateFriendly);
    document.getElementById("enemy-populate-btn").addEventListener("click", populateEnemy);
    document.getElementById("friendly-status-btn").addEventListener("click", startFriendlyStatus);
    document.getElementById("enemy-status-btn").addEventListener("click", startEnemyStatus);

    setupDropZones();
    attachCardClickLogging();
}

// ---- On load: wire and attempt to load any existing JSON lists ----
document.addEventListener("DOMContentLoaded", async () => {
    wireUp();
    // attempt to load existing data (if files exist)
    await loadMembers("friendly");
    await loadMembers("enemy");
});