const TOKEN_KEY = "gameservers-control-token";

const state = {
  token: localStorage.getItem(TOKEN_KEY) || "",
  session: null,
  servers: [],
  groups: [],
  allServers: [],
};

const els = {
  status: document.getElementById("status"),
  sessionLabel: document.getElementById("sessionLabel"),
  loginView: document.getElementById("loginView"),
  appView: document.getElementById("appView"),
  loginForm: document.getElementById("loginForm"),
  passwordInput: document.getElementById("passwordInput"),
  logoutBtn: document.getElementById("logoutBtn"),
  refreshBtn: document.getElementById("refreshBtn"),
  adminTab: document.getElementById("adminTab"),
  logsTab: document.getElementById("logsTab"),
  serversBody: document.getElementById("serversBody"),
  logsBody: document.getElementById("logsBody"),
  groupsList: document.getElementById("groupsList"),
  createGroupForm: document.getElementById("createGroupForm"),
  newGroupName: document.getElementById("newGroupName"),
  newGroupPassword: document.getElementById("newGroupPassword"),
  generatedPassword: document.getElementById("generatedPassword"),
  cleanupServersBtn: document.getElementById("cleanupServersBtn"),
};

function setStatus(message, type = "info") {
  els.status.textContent = message;
  els.status.className = `status status--${type}`;
  els.status.hidden = false;
}

function clearStatus() {
  els.status.hidden = true;
  els.status.textContent = "";
}

async function apiFetch(path, options = {}) {
  const headers = new Headers(options.headers || {});
  if (state.token) headers.set("Authorization", `Bearer ${state.token}`);
  const isFormData = options.body instanceof FormData;
  if (options.body && !isFormData && !headers.has("Content-Type")) {
    headers.set("Content-Type", "application/json");
  }

  const response = await fetch(path, {
    method: options.method || "GET",
    headers,
    body:
      options.body && !isFormData && typeof options.body !== "string"
        ? JSON.stringify(options.body)
        : options.body,
  });

  const contentType = response.headers.get("content-type") || "";
  const payload = contentType.includes("application/json")
    ? await response.json()
    : await response.text();

  if (!response.ok) {
    throw new Error(payload?.error || response.statusText);
  }

  return payload;
}

function setAuthenticated({ token, session }) {
  if (token) {
    state.token = token;
    localStorage.setItem(TOKEN_KEY, token);
  }
  state.session = session;
  els.loginView.hidden = true;
  els.appView.hidden = false;
  els.logoutBtn.hidden = false;
  els.refreshBtn.hidden = false;
  els.adminTab.hidden = !session.admin;
  els.logsTab.hidden = !session.admin;
  els.sessionLabel.textContent = session.admin ? "Administrateur" : "Connecte";
}

function setLoggedOut() {
  state.token = "";
  state.session = null;
  localStorage.removeItem(TOKEN_KEY);
  els.loginView.hidden = false;
  els.appView.hidden = true;
  els.logoutBtn.hidden = true;
  els.refreshBtn.hidden = true;
  els.sessionLabel.textContent = "Non connecte";
  switchTab("servers");
}

async function loadSession() {
  if (!state.token) return setLoggedOut();
  try {
    const data = await apiFetch("/api/session");
    setAuthenticated({ session: data.session });
    await refreshAll();
  } catch {
    setLoggedOut();
  }
}

async function refreshAll() {
  await loadServers();
  if (state.session?.admin) {
    await Promise.all([loadAdmin(), loadLogs()]);
  }
}

async function loadServers() {
  const data = await apiFetch("/api/servers");
  state.servers = data.servers || [];
  renderServers();
}

function renderServers() {
  els.serversBody.innerHTML = "";
  if (!state.servers.length) {
    els.serversBody.innerHTML = `<div class="empty-state">Aucun serveur visible.</div>`;
    return;
  }

  for (const server of state.servers) {
    const card = document.createElement("article");
    card.className = "server-card";
    const heroStyle = server.heroImage
      ? ` style="--server-hero-image: url('${escapeCssUrl(server.heroImage)}')"`
      : "";
    const secrets = server.secrets && Object.keys(server.secrets).length
      ? Object.entries(server.secrets)
          .map(
            ([key, value]) => `
              <div class="info-row">
                <span>${escapeHtml(formatSecretLabel(key))}</span>
                <code>${escapeHtml(value)}</code>
              </div>
            `
          )
          .join("")
      : server.hasSecrets
        ? `<span class="muted">Masques</span>`
        : `
          <div class="info-row info-row--empty">
            <span>Mot de passe</span>
            <strong>aucun</strong>
          </div>
        `;

    card.innerHTML = `
      <div class="server-card__hero"${heroStyle}>
        <div class="server-card__icon" aria-hidden="true"></div>
        <span class="chip ${server.active ? "chip--online" : "chip--offline"}">
          ${server.active ? "En ligne" : "Hors ligne"}
        </span>
      </div>
      <div class="server-card__body">
        <div>
          <p class="server-card__kicker">Serveur jeu</p>
          <h3>${escapeHtml(server.game)}</h3>
        </div>
        <div class="server-card__details">
          <div class="info-row">
            <span>Adresse IP</span>
            <code>${escapeHtml(server.address || "-")}</code>
          </div>
          <div class="info-row">
            <span>Port</span>
            <strong>${server.port ?? "-"}</strong>
          </div>
        </div>
        <div class="server-password">
          ${secrets}
        </div>
      </div>
      <div class="server-card__actions">
        <button class="btn btn--small" data-start="${escapeHtml(server.id)}" ${server.canStart ? "" : "disabled"}>
          Lancer le serveur
        </button>
        ${renderAdminEditButton(server)}
        ${renderAdminEditPanel(server)}
      </div>
    `;
    els.serversBody.appendChild(card);
  }
}

function renderAdminEditButton(server) {
  if (!state.session?.admin) return "";

  return `
    <button
      class="btn btn--small btn--ghost btn--icon"
      data-edit-server="${escapeHtml(server.id)}"
      type="button"
      title="Editer le serveur"
      aria-label="Editer le serveur"
    >
      ✎
    </button>
  `;
}

function renderAdminEditPanel(server) {
  if (!state.session?.admin) return "";

  return `
    <div class="server-edit-panel" data-edit-panel="${escapeHtml(server.id)}" hidden>
      ${renderPasswordControls(server)}
      ${renderImageControls(server)}
    </div>
  `;
}

function renderPasswordControls(server) {
  if (!state.session?.admin) return "";
  const password = getServerPasswordValue(server);

  return `
    <div class="password-controls">
      <label class="file-control">
        <span>Mot de passe</span>
        <input
          type="text"
          value="${escapeHtml(password)}"
          data-password-input="${escapeHtml(server.id)}"
          autocomplete="off"
        />
      </label>
      <button class="btn btn--small btn--ghost" data-save-password="${escapeHtml(server.id)}" type="button">
        Sauver
      </button>
    </div>
  `;
}

function renderImageControls(server) {
  if (!state.session?.admin) return "";

  return `
    <div class="image-controls">
      <label class="file-control">
        <span>Image</span>
        <input type="file" accept="image/png,image/jpeg,image/webp" data-image-input="${escapeHtml(server.id)}" />
      </label>
      <div class="image-controls__actions">
        <button class="btn btn--small btn--ghost" data-upload-image="${escapeHtml(server.id)}" type="button">
          Envoyer
        </button>
        <button class="btn btn--small btn--danger" data-delete-image="${escapeHtml(server.id)}" type="button" ${server.heroImage ? "" : "disabled"}>
          Retirer
        </button>
      </div>
    </div>
  `;
}

function getServerPasswordValue(server) {
  if (!server.secrets) return "";
  return server.secrets.serverPassword || server.secrets.password || "";
}

async function startServer(serverId, button) {
  button.disabled = true;
  const previous = button.textContent;
  button.textContent = "Lancement...";
  try {
    await apiFetch(`/api/servers/${encodeURIComponent(serverId)}/start`, { method: "POST" });
    setStatus("Lancement demande", "success");
    await refreshAll();
  } catch (error) {
    setStatus(error.message, "error");
    button.disabled = false;
  } finally {
    button.textContent = previous;
  }
}

async function uploadServerImage(serverId) {
  const input = document.querySelector(`[data-image-input="${cssEscape(serverId)}"]`);
  const file = input?.files?.[0];
  if (!file) {
    setStatus("Choisis une image avant l'envoi", "error");
    return;
  }

  const formData = new FormData();
  formData.set("image", file);
  await apiFetch(`/api/admin/servers/${encodeURIComponent(serverId)}/image`, {
    method: "POST",
    body: formData,
  });
  setStatus("Image serveur mise a jour", "success");
  await refreshAll();
}

async function deleteServerImage(serverId) {
  await apiFetch(`/api/admin/servers/${encodeURIComponent(serverId)}/image`, {
    method: "DELETE",
  });
  setStatus("Image serveur retiree", "success");
  await refreshAll();
}

function toggleServerEditPanel(serverId) {
  const panel = document.querySelector(`[data-edit-panel="${cssEscape(serverId)}"]`);
  if (!panel) return;
  panel.hidden = !panel.hidden;
}

async function saveServerPassword(serverId) {
  const input = document.querySelector(`[data-password-input="${cssEscape(serverId)}"]`);
  await apiFetch(`/api/admin/servers/${encodeURIComponent(serverId)}/password`, {
    method: "PATCH",
    body: { password: input?.value || "" },
  });
  setStatus("Mot de passe serveur mis a jour", "success");
  await refreshAll();
}

async function loadAdmin() {
  const data = await apiFetch("/api/admin/groups");
  state.groups = data.groups || [];
  state.allServers = data.servers || [];
  renderGroups();
}

function renderGroups() {
  els.groupsList.innerHTML = "";
  for (const group of state.groups) {
    const article = document.createElement("article");
    article.className = "group-card";
    const permissions = group.permissions || { servers: [] };
    article.innerHTML = `
      <div class="group-card__header">
        <input class="group-name" value="${escapeHtml(group.name)}" data-name="${escapeHtml(group.id)}" />
        <span class="chip">${group.admin ? "Admin" : "Groupe"}</span>
      </div>
      <div class="server-perms">
        ${state.allServers
          .map(
            (server) => `
              <label class="check">
                <input type="checkbox" data-server-perm="${escapeHtml(group.id)}" value="${escapeHtml(server.id)}" ${permissions.servers.includes(server.id) ? "checked" : ""} ${group.admin ? "disabled" : ""} />
                ${escapeHtml(server.game)}
              </label>
            `
          )
          .join("")}
      </div>
      <div class="manual-password">
        <label class="file-control">
          <span>Mot de passe</span>
          <input
            type="text"
            placeholder="Nouveau mot de passe"
            data-group-password="${escapeHtml(group.id)}"
            autocomplete="off"
          />
        </label>
      </div>
      <div class="card-actions">
        <button class="btn btn--small" data-save-group="${escapeHtml(group.id)}">Sauver</button>
        <button class="btn btn--small btn--ghost" data-set-group-password="${escapeHtml(group.id)}">Set mdp</button>
        <button class="btn btn--small btn--ghost" data-regen="${escapeHtml(group.id)}">Regenerer mdp</button>
        <button class="btn btn--small btn--danger" data-delete="${escapeHtml(group.id)}" ${group.id === "admin" ? "disabled" : ""}>Supprimer</button>
      </div>
    `;
    els.groupsList.appendChild(article);
  }
}

async function saveGroup(groupId) {
  const name = document.querySelector(`[data-name="${cssEscape(groupId)}"]`)?.value.trim();
  const servers = Array.from(document.querySelectorAll(`[data-server-perm="${cssEscape(groupId)}"]:checked`)).map(
    (input) => input.value
  );

  await apiFetch(`/api/admin/groups/${encodeURIComponent(groupId)}`, {
    method: "PATCH",
    body: {
      name,
      permissions: { servers },
    },
  });
  setStatus("Groupe sauvegarde", "success");
  await loadAdmin();
}

async function regeneratePassword(groupId) {
  const data = await apiFetch(`/api/admin/groups/${encodeURIComponent(groupId)}/regenerate-password`, {
    method: "POST",
  });
  showGeneratedPassword(data.group.name, data.password);
  await loadAdmin();
}

async function setGroupPassword(groupId) {
  const input = document.querySelector(`[data-group-password="${cssEscape(groupId)}"]`);
  const password = input?.value.trim() || "";
  if (!password) {
    setStatus("Mot de passe requis", "error");
    return;
  }

  const data = await apiFetch(`/api/admin/groups/${encodeURIComponent(groupId)}/password`, {
    method: "PATCH",
    body: { password },
  });
  input.value = "";
  showGeneratedPassword(data.group.name, data.password);
  await loadAdmin();
}

async function deleteGroup(groupId) {
  await apiFetch(`/api/admin/groups/${encodeURIComponent(groupId)}`, { method: "DELETE" });
  setStatus("Groupe supprime", "success");
  await loadAdmin();
}

async function createGroup(event) {
  event.preventDefault();
  const data = await apiFetch("/api/admin/groups", {
    method: "POST",
    body: {
      name: els.newGroupName.value.trim(),
      password: els.newGroupPassword.value.trim(),
      permissions: { servers: [] },
    },
  });
  els.createGroupForm.reset();
  showGeneratedPassword(data.group.name, data.password);
  await loadAdmin();
}

async function cleanupServers() {
  const data = await apiFetch("/api/admin/servers/cleanup", { method: "POST" });
  const removedCount = data.removedServers?.length || 0;
  const imageCount = data.removedImages?.length || 0;
  setStatus(
    `Nettoyage termine: ${removedCount} configuration(s), ${imageCount} image(s) retiree(s)`,
    "success"
  );
  await refreshAll();
}

function showGeneratedPassword(groupName, password) {
  els.generatedPassword.hidden = false;
  els.generatedPassword.innerHTML = `Mot de passe pour <strong>${escapeHtml(groupName)}</strong>: <code>${escapeHtml(password)}</code>`;
}

async function loadLogs() {
  const data = await apiFetch("/api/logs");
  renderLogs(data.logs || []);
}

function renderLogs(logs) {
  els.logsBody.innerHTML = "";
  if (!logs.length) {
    els.logsBody.innerHTML = `<tr><td colspan="3" class="muted">Aucun lancement sur 7 jours.</td></tr>`;
    return;
  }

  for (const log of logs) {
    const tr = document.createElement("tr");
    tr.innerHTML = `
      <td>${escapeHtml(new Date(log.createdAt).toLocaleString())}</td>
      <td>${escapeHtml(log.groupName || log.groupId || "-")}</td>
      <td>${escapeHtml(log.serverName || log.serverId || "-")}</td>
    `;
    els.logsBody.appendChild(tr);
  }
}

function switchTab(tabName) {
  document.querySelectorAll(".tab").forEach((tab) => {
    tab.classList.toggle("tab--active", tab.dataset.tab === tabName);
  });
  document.querySelectorAll("[data-panel]").forEach((panel) => {
    panel.hidden = panel.dataset.panel !== tabName;
  });
}

function escapeHtml(value = "") {
  return String(value)
    .replace(/&/g, "&amp;")
    .replace(/</g, "&lt;")
    .replace(/>/g, "&gt;")
    .replace(/"/g, "&quot;")
    .replace(/'/g, "&#039;");
}

function escapeCssUrl(value = "") {
  return String(value).replace(/['"\\\n\r]/g, "");
}

function formatSecretLabel(key = "") {
  if (key === "password" || key === "serverPassword") {
    return "Mot de passe";
  }

  return key;
}

function cssEscape(value) {
  return CSS.escape(value);
}

els.loginForm.addEventListener("submit", async (event) => {
  event.preventDefault();
  clearStatus();
  try {
    const data = await apiFetch("/api/login", {
      method: "POST",
      body: { password: els.passwordInput.value },
    });
    els.passwordInput.value = "";
    setAuthenticated(data);
    await refreshAll();
  } catch (error) {
    setStatus(error.message, "error");
  }
});

els.logoutBtn.addEventListener("click", async () => {
  try {
    await apiFetch("/api/logout", { method: "POST" });
  } catch {
    // Local logout remains valid if the server session already expired.
  }
  setLoggedOut();
});

els.refreshBtn.addEventListener("click", () => refreshAll().catch((error) => setStatus(error.message, "error")));
els.createGroupForm.addEventListener("submit", (event) =>
  createGroup(event).catch((error) => setStatus(error.message, "error"))
);
els.cleanupServersBtn?.addEventListener("click", () =>
  cleanupServers().catch((error) => setStatus(error.message, "error"))
);

document.addEventListener("click", (event) => {
  const target = event.target;
  if (!(target instanceof HTMLElement)) return;

  const tab = target.closest("[data-tab]");
  if (tab) switchTab(tab.dataset.tab);

  const startId = target.dataset.start;
  if (startId) startServer(startId, target).catch((error) => setStatus(error.message, "error"));

  const saveId = target.dataset.saveGroup;
  if (saveId) saveGroup(saveId).catch((error) => setStatus(error.message, "error"));

  const regenId = target.dataset.regen;
  if (regenId) regeneratePassword(regenId).catch((error) => setStatus(error.message, "error"));

  const setPasswordId = target.dataset.setGroupPassword;
  if (setPasswordId) setGroupPassword(setPasswordId).catch((error) => setStatus(error.message, "error"));

  const deleteId = target.dataset.delete;
  if (deleteId) deleteGroup(deleteId).catch((error) => setStatus(error.message, "error"));

  const uploadImageId = target.dataset.uploadImage;
  if (uploadImageId) uploadServerImage(uploadImageId).catch((error) => setStatus(error.message, "error"));

  const deleteImageId = target.dataset.deleteImage;
  if (deleteImageId) deleteServerImage(deleteImageId).catch((error) => setStatus(error.message, "error"));

  const editServerId = target.dataset.editServer;
  if (editServerId) toggleServerEditPanel(editServerId);

  const savePasswordId = target.dataset.savePassword;
  if (savePasswordId) saveServerPassword(savePasswordId).catch((error) => setStatus(error.message, "error"));
});

loadSession();