"use strict";

const state = { repos: [], jobs: [], token: "" };

/* ---------------------------------- auth ---------------------------------- */

const TOKEN_KEY = "cr-admin-token";

function token() {
  return state.token || localStorage.getItem(TOKEN_KEY) || "";
}

function showGate(message) {
  const gate = document.getElementById("token-gate");
  const err = document.getElementById("token-error");
  gate.classList.remove("hidden");
  if (message) {
    err.textContent = message;
    err.classList.remove("hidden");
  } else {
    err.classList.add("hidden");
  }
  document.getElementById("token-form").elements.token.focus();
}

function hideGate() {
  document.getElementById("token-gate").classList.add("hidden");
}

function setBanner(message, kind) {
  const el = document.getElementById("banner");
  if (!message) {
    el.classList.add("hidden");
    return;
  }
  el.textContent = message;
  el.className = `banner${kind === "ok" ? " ok" : ""}`;
}

document.getElementById("token-form").addEventListener("submit", async (ev) => {
  ev.preventDefault();
  const value = ev.target.elements.token.value.trim();
  if (!value) return;
  state.token = value;
  try {
    await api("/repos");
    localStorage.setItem(TOKEN_KEY, value);
    hideGate();
    document.getElementById("sign-out").classList.remove("hidden");
    setBanner("");
    await refreshAll();
  } catch (err) {
    state.token = "";
    showGate(`Token 无效：${err.message}`);
  }
});

document.getElementById("sign-out").addEventListener("click", () => {
  state.token = "";
  localStorage.removeItem(TOKEN_KEY);
  document.getElementById("sign-out").classList.add("hidden");
  showGate("");
});

/* ---------------------------------- api ----------------------------------- */

async function api(path, { method = "GET", body } = {}) {
  const headers = { Accept: "application/json" };
  const t = token();
  if (t) headers.Authorization = `Bearer ${t}`;
  if (body !== undefined) headers["Content-Type"] = "application/json";
  const res = await fetch(`/api${path}`, {
    method, headers, body: body === undefined ? undefined : JSON.stringify(body),
  });
  const textBody = await res.text();
  let parsed = null;
  try { parsed = textBody ? JSON.parse(textBody) : null; } catch { parsed = textBody; }
  if (!res.ok) {
    const error = new Error(parsed?.error || `HTTP ${res.status}`);
    error.status = res.status;
    throw error;
  }
  return parsed;
}

function show(selector, content) {
  const el = document.querySelector(selector);
  el.textContent = typeof content === "string" ? content : JSON.stringify(content, null, 2);
  el.classList.remove("hidden");
}

function hide(selector) { document.querySelector(selector).classList.add("hidden"); }

function esc(value) {
  return String(value ?? "").replace(/[&<>"]/g, (c) => (
    { "&": "&amp;", "<": "&lt;", ">": "&gt;", '"': "&quot;" }[c]
  ));
}

function fmtTime(value) {
  if (!value) return "";
  return String(value).replace("T", " ").replace("Z", "");
}

/* ---------------------------------- tabs ---------------------------------- */

for (const tab of document.querySelectorAll(".tab")) {
  tab.addEventListener("click", () => {
    for (const t of document.querySelectorAll(".tab")) t.classList.toggle("active", t === tab);
    for (const p of document.querySelectorAll(".panel")) {
      p.classList.toggle("active", p.id === `tab-${tab.dataset.tab}`);
    }
    if (tab.dataset.tab === "jobs") loadJobs().catch(handleError);
    if (tab.dataset.tab === "settings") loadSettings().catch(handleError);
  });
}

/* --------------------------------- health --------------------------------- */

async function loadHealth() {
  try {
    const h = await api("/health");
    const q = h.queue || {};
    document.getElementById("status").textContent =
      `队列 运行${q.running || 0} / 等待${q.queued || 0} · 成功${q.succeeded || 0} · 失败${q.failed || 0}` +
      (h.llmModel ? ` · ${h.llmModel}` : "");
  } catch (err) {
    document.getElementById("status").textContent = `服务异常：${err.message}`;
  }
}

function handleError(err) {
  if (err.status === 401) {
    document.getElementById("sign-out").classList.add("hidden");
    showGate("Token 无效或已过期，请重新输入。");
    return;
  }
  setBanner(err.message);
}

/* ---------------------------------- repos --------------------------------- */

const REPO_FIELDS = [
  "id", "owner", "name", "enabled", "base_branch", "branch_patterns", "review_scope",
  "gitea_token", "llm_model", "llm_token", "background_template", "excludes",
  "publish_mode", "create_issue", "issue_labels", "block_severity", "block_categories",
  "fail_on_findings", "auto_merge", "auto_merge_mode", "merge_method", "delete_branch",
  "max_comments", "concurrency",
];

async function loadRepos() {
  state.repos = await api("/repos");
  const tbody = document.querySelector("#repos-table tbody");
  if (state.repos.length === 0) {
    tbody.innerHTML = '<tr><td colspan="7" class="empty">还没有配置仓库。点右上角「新增仓库」开始，然后在 Gitea 仓库里添加 Webhook。</td></tr>';
    return;
  }
  tbody.innerHTML = state.repos.map((r) => `
    <tr>
      <td><strong>${esc(r.owner)}/${esc(r.name)}</strong><br><span class="tag muted">${esc(r.base_branch)}</span></td>
      <td><code>${esc(r.branch_patterns)}</code></td>
      <td>${esc(scopeLabel(r.review_scope))}</td>
      <td>${r.enabled ? '<span class="tag ok">启用</span>' : '<span class="tag muted">停用</span>'}</td>
      <td>${r.auto_merge ? `<span class="tag warn">${esc(r.merge_method)}</span>` : '<span class="tag muted">否</span>'}</td>
      <td><code>${esc(r.block_severity || "—")}</code></td>
      <td>
        <button data-edit="${r.id}">编辑</button>
        <button data-run="${r.id}">立即审查</button>
        <button class="danger" data-del="${r.id}">删除</button>
      </td>
    </tr>`).join("");
}

function scopeLabel(scope) {
  return { both: "Push + PR", pr: "仅 PR", push: "仅 Push" }[scope] || scope;
}

document.querySelector("#repos-table").addEventListener("click", async (ev) => {
  const target = ev.target.closest("button");
  if (!target) return;
  try {
    if (target.dataset.edit) openRepo(Number(target.dataset.edit));
    if (target.dataset.del) {
      if (!confirm("删除该仓库配置？历史任务会一并删除。")) return;
      await api(`/repos/${target.dataset.del}`, { method: "DELETE" });
      await loadRepos();
    }
    if (target.dataset.run) openManual(Number(target.dataset.run));
  } catch (err) {
    handleError(err);
  }
});

document.getElementById("add-repo").addEventListener("click", () => openRepo(null));
document.getElementById("refresh-jobs").addEventListener("click", () => loadJobs().catch(handleError));

/* ------------------------------- repo dialog ------------------------------ */

const modal = document.getElementById("modal");
const form = document.getElementById("repo-form");

function openRepo(id) {
  form.reset();
  hide("#repo-result");
  const repo = id ? state.repos.find((r) => r.id === id) : null;
  document.getElementById("modal-title").textContent = repo ? `${repo.owner}/${repo.name}` : "新增仓库";
  for (const field of REPO_FIELDS) {
    const input = form.elements[field];
    if (!input) continue;
    if (!repo) {
      // Defaults for a brand-new repository.
      if (field === "enabled" || field === "create_issue") input.checked = true;
      continue;
    }
    if (input.type === "checkbox") input.checked = Boolean(repo[field]);
    else if (input.type === "password") input.value = "";
    else input.value = repo[field] ?? "";
  }
  modal.classList.remove("hidden");
}

document.getElementById("modal-close").addEventListener("click", () => modal.classList.add("hidden"));
modal.addEventListener("click", (ev) => { if (ev.target === modal) modal.classList.add("hidden"); });

form.addEventListener("submit", async (ev) => {
  ev.preventDefault();
  const data = {};
  for (const field of REPO_FIELDS) {
    const input = form.elements[field];
    if (!input) continue;
    if (input.type === "checkbox") data[field] = input.checked ? 1 : 0;
    else if (input.type === "password") { if (input.value) data[field] = input.value; }
    else if (input.value !== "") data[field] = input.value;
  }
  try {
    if (data.id) await api(`/repos/${data.id}`, { method: "PATCH", body: data });
    else await api("/repos", { method: "POST", body: data });
    modal.classList.add("hidden");
    setBanner("");
    await loadRepos();
  } catch (err) {
    if (err.status === 401) return handleError(err);
    show("#repo-result", err.message);
  }
});

document.getElementById("discover").addEventListener("click", async () => {
  const id = form.elements.id.value;
  if (!id) return show("#repo-result", "请先保存仓库，再测试连接。");
  show("#repo-result", "测试中…");
  try {
    const info = await api(`/repos/${id}/discover`, { method: "POST" });
    show("#repo-result",
      `连接成功\n默认分支：${info.default_branch}\nIssue 功能：${info.has_issues}\nPR 功能：${info.has_pull_requests}\n分支：${info.branches.join(", ")}`);
  } catch (err) {
    if (err.status === 401) return handleError(err);
    show("#repo-result", err.message);
  }
});

/* ------------------------------ manual dialog ----------------------------- */

const manualModal = document.getElementById("manual-modal");
const manualForm = document.getElementById("manual-form");

function openManual(repoId) {
  const repo = state.repos.find((r) => r.id === repoId);
  if (!repo) return;
  manualForm.reset();
  hide("#manual-result");
  manualForm.elements.repo_id.value = repo.id;
  manualForm.elements.ref.value = repo.base_branch || "main";
  manualForm.elements.base_ref.value = repo.base_branch || "main";
  document.getElementById("manual-repo").textContent = `${repo.owner}/${repo.name}`;
  manualModal.classList.remove("hidden");
}

document.getElementById("manual-close").addEventListener("click", () => manualModal.classList.add("hidden"));
manualModal.addEventListener("click", (ev) => { if (ev.target === manualModal) manualModal.classList.add("hidden"); });

manualForm.addEventListener("submit", async (ev) => {
  ev.preventDefault();
  const body = {
    repo_id: Number(manualForm.elements.repo_id.value),
    ref: manualForm.elements.ref.value.trim(),
    sha: manualForm.elements.sha.value.trim(),
    base_ref: manualForm.elements.base_ref.value.trim() || undefined,
  };
  const pr = manualForm.elements.pr_number.value.trim();
  if (pr) body.pr_number = Number(pr);
  try {
    const res = await api("/review", { method: "POST", body });
    manualModal.classList.add("hidden");
    setBanner(`已加入队列：任务 #${res.jobId}`, "ok");
    await loadJobs();
  } catch (err) {
    if (err.status === 401) return handleError(err);
    show("#manual-result", err.message);
  }
});

/* ---------------------------------- jobs ---------------------------------- */

const STATUS_TAG = {
  queued: "muted", running: "warn", succeeded: "ok", failed: "err", skipped: "muted",
};

async function loadJobs() {
  state.jobs = await api("/jobs?limit=100");
  const tbody = document.querySelector("#jobs-table tbody");
  if (state.jobs.length === 0) {
    tbody.innerHTML = '<tr><td colspan="10" class="empty">暂无任务。仓库收到 push 或 Pull Request 后会出现在这里。</td></tr>';
    return;
  }
  tbody.innerHTML = state.jobs.map((j) => `
    <tr>
      <td>${j.id}</td>
      <td>${esc(j.owner)}/${esc(j.name)}</td>
      <td><code>${esc(j.ref_name)}</code>${j.pr_number ? ` <span class="tag muted">PR #${j.pr_number}</span>` : ""}</td>
      <td><code>${esc(String(j.to_sha).slice(0, 10))}</code></td>
      <td><span class="tag ${STATUS_TAG[j.status] || "muted"}">${esc(j.status)}</span>${j.phase ? ` <span class="tag muted">${esc(j.phase)}</span>` : ""}</td>
      <td>${j.findings ?? 0}</td>
      <td>${j.blocking ? `<span class="tag err">${j.blocking}</span>` : "0"}</td>
      <td>${j.merged ? '<span class="tag ok">已合并</span>' : ""}</td>
      <td>${fmtTime(j.started_at || j.created_at)}</td>
      <td><button data-log="${j.id}">日志</button> <button data-retry="${j.id}">重跑</button></td>
    </tr>`).join("");
}

document.querySelector("#jobs-table").addEventListener("click", async (ev) => {
  const target = ev.target.closest("button");
  if (!target) return;
  try {
    if (target.dataset.log) {
      const job = await api(`/jobs/${target.dataset.log}`);
      show("#job-log", job.log || "(无日志)");
    }
    if (target.dataset.retry) {
      await api(`/jobs/${target.dataset.retry}/retry`, { method: "POST" });
      await loadJobs();
    }
  } catch (err) {
    handleError(err);
  }
});

/* -------------------------------- settings -------------------------------- */

const SETTINGS_FIELDS = [
  "giteaUrl", "giteaToken", "webhookSecret", "adminToken", "llmUrl", "llmToken",
  "llmModel", "llmProtocol", "llmAuthHeader", "llmExtraHeaders", "rulePath",
];

async function loadSettings() {
  const settingsForm = document.getElementById("settings-form");
  const s = await api("/settings");
  for (const field of SETTINGS_FIELDS) {
    const input = settingsForm.elements[field];
    if (!input) continue;
    if (input.type === "password") input.value = "";
    else input.value = s[field] ?? "";
  }
  document.getElementById("hook-url").textContent = `${location.origin}/webhook/gitea`;
}

document.getElementById("settings-form").addEventListener("submit", async (ev) => {
  ev.preventDefault();
  const settingsForm = ev.target;
  const data = {};
  for (const field of SETTINGS_FIELDS) {
    const input = settingsForm.elements[field];
    if (input && input.value) data[field] = input.value;
  }
  try {
    await api("/settings", { method: "PUT", body: data });
    if (data.adminToken) {
      state.token = data.adminToken;
      localStorage.setItem(TOKEN_KEY, data.adminToken);
    }
    for (const field of SETTINGS_FIELDS) {
      const input = settingsForm.elements[field];
      if (input && input.type === "password") input.value = "";
    }
    show("#settings-result", "已保存。");
    await loadHealth();
  } catch (err) {
    if (err.status === 401) return handleError(err);
    show("#settings-result", err.message);
  }
});

document.getElementById("test-gitea").addEventListener("click", async () => {
  show("#settings-result", "测试中…");
  try { show("#settings-result", await api("/gitea/test", { method: "POST" })); }
  catch (err) { show("#settings-result", err.message); }
});

document.getElementById("test-llm").addEventListener("click", async () => {
  show("#settings-result", "测试中，请稍候…");
  try { show("#settings-result", await api("/selftest", { method: "POST" })); }
  catch (err) { show("#settings-result", err.message); }
});

/* --------------------------------- startup -------------------------------- */

async function refreshAll() {
  await loadRepos();
  await loadHealth();
}

async function boot() {
  await loadHealth();
  if (!token()) {
    showGate("");
    return;
  }
  try {
    await refreshAll();
    document.getElementById("sign-out").classList.remove("hidden");
  } catch (err) {
    handleError(err);
  }
}

boot();
setInterval(loadHealth, 10000);