import { test, before, after } from "node:test";
import assert from "node:assert/strict";
import pg from "pg";

const API_BASE = process.env.TEST_API_BASE ?? "http://localhost:8080";
const DATABASE_URL = process.env.DATABASE_URL;
if (!DATABASE_URL) {
  throw new Error("DATABASE_URL must be set to run these tests");
}

const TEST_PASSWORD = "TestPass123!";
const TEST_PASSWORD_HASH =
  "$2b$10$Bs636ukPMyz01nKrsi.5m.JlDXSN22AVCvn8cgPWWDbo5yJRQX2vu";

const pool = new pg.Pool({ connectionString: DATABASE_URL });

let adminId;
let adminUsername;
let adminCookie;
let nonAdminCookie;
const createdUserIds = [];
const createdAppIds = [];
const createdPermissionIds = [];

async function loginAndGetCookie(username, password) {
  const res = await fetch(`${API_BASE}/api/auth/login`, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ username, password }),
  });
  assert.equal(res.status, 200, `login expected 200, got ${res.status}`);
  const setCookie = res.headers.get("set-cookie");
  return setCookie
    .split(",")
    .map((c) => c.split(";")[0].trim())
    .find((c) => c.startsWith("connect.sid="));
}

function uniqueName(prefix) {
  return `${prefix}_${Date.now().toString(36)}${Math.random()
    .toString(36)
    .slice(2, 6)}`;
}

async function createApp() {
  const slug = uniqueName("app_audit");
  const r = await pool.query(
    `INSERT INTO apps (slug, name_ar, name_en, icon_name, color, route)
     VALUES ($1, 'تطبيق', 'App', 'Grid', '#6366f1', '/x') RETURNING id`,
    [slug],
  );
  const id = r.rows[0].id;
  createdAppIds.push(id);
  return { id, slug };
}

async function createPermission() {
  const name = uniqueName("app_audit_perm");
  const r = await pool.query(
    `INSERT INTO permissions (name, description_en) VALUES ($1::varchar, $1::text) RETURNING id`,
    [name],
  );
  const id = r.rows[0].id;
  createdPermissionIds.push(id);
  return { id, name };
}

before(async () => {
  adminUsername = uniqueName("app_audit_admin");
  const a = await pool.query(
    `INSERT INTO users (username, email, password_hash, display_name_en, preferred_language, is_active)
     VALUES ($1, $2, $3, 'App Audit Admin', 'en', true) RETURNING id`,
    [adminUsername, `${adminUsername}@example.com`, TEST_PASSWORD_HASH],
  );
  adminId = a.rows[0].id;
  createdUserIds.push(adminId);
  await pool.query(
    `INSERT INTO user_roles (user_id, role_id) SELECT $1, id FROM roles WHERE name = 'admin'`,
    [adminId],
  );
  await pool.query(
    `INSERT INTO user_groups (user_id, group_id)
     SELECT $1, id FROM groups WHERE name IN ('Everyone', 'Admins')
     ON CONFLICT DO NOTHING`,
    [adminId],
  );
  adminCookie = await loginAndGetCookie(adminUsername, TEST_PASSWORD);

  const naUsername = uniqueName("app_audit_nonadmin");
  const na = await pool.query(
    `INSERT INTO users (username, email, password_hash, display_name_en, preferred_language, is_active)
     VALUES ($1, $2, $3, 'Non Admin', 'en', true) RETURNING id`,
    [naUsername, `${naUsername}@example.com`, TEST_PASSWORD_HASH],
  );
  createdUserIds.push(na.rows[0].id);
  nonAdminCookie = await loginAndGetCookie(naUsername, TEST_PASSWORD);
});

after(async () => {
  if (createdAppIds.length) {
    await pool.query(
      `DELETE FROM permission_audit WHERE target_kind = 'app' AND target_id = ANY($1::int[])`,
      [createdAppIds],
    );
    await pool.query(
      `DELETE FROM app_permissions WHERE app_id = ANY($1::int[])`,
      [createdAppIds],
    );
    await pool.query(`DELETE FROM apps WHERE id = ANY($1::int[])`, [
      createdAppIds,
    ]);
  }
  if (createdPermissionIds.length) {
    await pool.query(
      `DELETE FROM permissions WHERE id = ANY($1::int[])`,
      [createdPermissionIds],
    );
  }
  for (const uid of createdUserIds) {
    await pool.query(`DELETE FROM user_groups WHERE user_id = $1`, [uid]);
    await pool.query(`DELETE FROM user_roles WHERE user_id = $1`, [uid]);
    await pool.query(`DELETE FROM users WHERE id = $1`, [uid]);
  }
  await pool.end();
});

test("POST /api/apps/:id/permissions writes an app.permissions audit row transactionally", async () => {
  const app = await createApp();
  const p1 = await createPermission();

  const before = await pool.query(
    `SELECT COUNT(*)::int AS c FROM permission_audit
      WHERE target_kind = 'app' AND target_id = $1`,
    [app.id],
  );
  assert.equal(before.rows[0].c, 0);

  const res = await fetch(`${API_BASE}/api/apps/${app.id}/permissions`, {
    method: "POST",
    headers: { "Content-Type": "application/json", Cookie: adminCookie },
    body: JSON.stringify({ permissionId: p1.id }),
  });
  assert.equal(res.status, 201);

  const rows = await pool.query(
    `SELECT actor_user_id, change_kind, previous_ids, new_ids
       FROM permission_audit
      WHERE target_kind = 'app' AND target_id = $1`,
    [app.id],
  );
  assert.equal(rows.rowCount, 1);
  const row = rows.rows[0];
  assert.equal(row.actor_user_id, adminId);
  assert.equal(row.change_kind, "app.permissions");
  assert.deepEqual(row.previous_ids, []);
  assert.deepEqual(row.new_ids, [p1.id]);

  // Idempotent re-add (same permissionId) → no new audit row.
  const dup = await fetch(`${API_BASE}/api/apps/${app.id}/permissions`, {
    method: "POST",
    headers: { "Content-Type": "application/json", Cookie: adminCookie },
    body: JSON.stringify({ permissionId: p1.id }),
  });
  assert.equal(dup.status, 201);
  const after = await pool.query(
    `SELECT COUNT(*)::int AS c FROM permission_audit
      WHERE target_kind = 'app' AND target_id = $1`,
    [app.id],
  );
  assert.equal(after.rows[0].c, 1);
});

test("DELETE /api/apps/:id/permissions/:permissionId records previous/new ids", async () => {
  const app = await createApp();
  const p1 = await createPermission();
  const p2 = await createPermission();

  for (const p of [p1, p2]) {
    const r = await fetch(`${API_BASE}/api/apps/${app.id}/permissions`, {
      method: "POST",
      headers: { "Content-Type": "application/json", Cookie: adminCookie },
      body: JSON.stringify({ permissionId: p.id }),
    });
    assert.equal(r.status, 201);
    await new Promise((r) => setTimeout(r, 5));
  }

  const del = await fetch(
    `${API_BASE}/api/apps/${app.id}/permissions/${p1.id}`,
    {
      method: "DELETE",
      headers: { Cookie: adminCookie },
    },
  );
  assert.equal(del.status, 204);

  const rows = await pool.query(
    `SELECT change_kind, previous_ids, new_ids
       FROM permission_audit
      WHERE target_kind = 'app' AND target_id = $1
      ORDER BY id DESC LIMIT 1`,
    [app.id],
  );
  assert.equal(rows.rowCount, 1);
  const sortedIds = (a) => [...a].sort((x, y) => x - y);
  assert.equal(rows.rows[0].change_kind, "app.permissions");
  assert.deepEqual(sortedIds(rows.rows[0].previous_ids), sortedIds([p1.id, p2.id]));
  assert.deepEqual(rows.rows[0].new_ids, [p2.id]);
});

test("GET /api/apps/:id/audit returns entries with diff fields, actor, pagination and date filters", async () => {
  const app = await createApp();
  const p1 = await createPermission();
  const p2 = await createPermission();
  const p3 = await createPermission();

  for (const p of [p1, p2, p3]) {
    const r = await fetch(`${API_BASE}/api/apps/${app.id}/permissions`, {
      method: "POST",
      headers: { "Content-Type": "application/json", Cookie: adminCookie },
      body: JSON.stringify({ permissionId: p.id }),
    });
    assert.equal(r.status, 201);
    await new Promise((r) => setTimeout(r, 10));
  }

  const allRes = await fetch(`${API_BASE}/api/apps/${app.id}/audit`, {
    headers: { Cookie: adminCookie },
  });
  assert.equal(allRes.status, 200);
  const all = await allRes.json();
  assert.equal(all.totalCount, 3);
  assert.equal(all.entries.length, 3);
  // Newest first: p3 added.
  const latest = all.entries[0];
  assert.equal(latest.changeKind, "app.permissions");
  assert.deepEqual(latest.addedIds, [p3.id]);
  assert.deepEqual(latest.removedIds, []);
  assert.ok(latest.actor);
  assert.equal(latest.actor.id, adminId);
  assert.equal(latest.actor.username, adminUsername);

  const pageRes = await fetch(
    `${API_BASE}/api/apps/${app.id}/audit?limit=2&offset=0`,
    { headers: { Cookie: adminCookie } },
  );
  assert.equal(pageRes.status, 200);
  const page = await pageRes.json();
  assert.equal(page.entries.length, 2);
  assert.equal(page.totalCount, 3);
  assert.equal(page.nextOffset, 2);

  // actorUserId filter — admin authored every row.
  const filteredRes = await fetch(
    `${API_BASE}/api/apps/${app.id}/audit?actorUserId=${adminId}`,
    { headers: { Cookie: adminCookie } },
  );
  const filtered = await filteredRes.json();
  assert.equal(filtered.totalCount, 3);

  const today = new Date().toISOString().slice(0, 10);
  const yesterday = new Date(Date.now() - 86400000).toISOString().slice(0, 10);
  const past = await fetch(
    `${API_BASE}/api/apps/${app.id}/audit?from=${yesterday}&to=${yesterday}`,
    { headers: { Cookie: adminCookie } },
  );
  const pastBody = await past.json();
  assert.equal(pastBody.totalCount, 0);

  const inRange = await fetch(
    `${API_BASE}/api/apps/${app.id}/audit?from=${today}&to=${today}`,
    { headers: { Cookie: adminCookie } },
  );
  const inRangeBody = await inRange.json();
  assert.equal(inRangeBody.totalCount, 3);
});

test("GET /api/apps/:id/audit is admin-only and 404s on unknown app", async () => {
  const app = await createApp();
  const res = await fetch(`${API_BASE}/api/apps/${app.id}/audit`, {
    headers: { Cookie: nonAdminCookie },
  });
  assert.equal(res.status, 403);

  const missing = await fetch(`${API_BASE}/api/apps/99999999/audit`, {
    headers: { Cookie: adminCookie },
  });
  assert.equal(missing.status, 404);
});