import { mkdir, mkdtemp, readFile, rm, writeFile } from "node:fs/promises";
import { tmpdir } from "node:os";
import { join } from "node:path";
import { afterEach, beforeEach, expect, test } from "vitest";
import { discover, fetchUsage } from "./usage.js";

let home: string;
beforeEach(async () => {
  home = await mkdtemp(join(tmpdir(), "usage-stores-"));
});
afterEach(async () => {
  await rm(home, { recursive: true, force: true });
});
function lookup(env: NodeJS.ProcessEnv = {}) {
  return { home, env, platform: "linux" as const, now: () => 1000 };
}
async function json(path: string, value: unknown) {
  const { dirname } = await import("node:path");
  await mkdir(dirname(path), { recursive: true });
  await writeFile(path, JSON.stringify(value));
}
async function accountIdentity(
  input: Parameters<typeof fetchUsage>[0],
  env: NodeJS.ProcessEnv = {},
) {
  const accounts = await discover({ kind: "global" }, lookup(env));
  const account = accounts.find(
    (candidate) => JSON.stringify(candidate.input) === JSON.stringify(input),
  );
  if (!account) throw new Error("Expected discovered login");
  return { key: account.key, ...(account.label ? { label: account.label } : {}) };
}
async function logins(options: Parameters<typeof discover>[1]) {
  return (await discover({ kind: "global" }, options)).map(
    (account) => account.input as Parameters<typeof fetchUsage>[0],
  );
}
async function database(path: string) {
  await mkdir((await import("node:path")).dirname(path), { recursive: true });
  const { DatabaseSync } = await import("node:sqlite");
  const db = new DatabaseSync(path);
  // Create the fixture with one durable commit instead of one per row.
  db.exec("BEGIN");
  db.exec(
    "CREATE TABLE auth_credentials (id INTEGER PRIMARY KEY, provider TEXT, credential_type TEXT, data TEXT, disabled_cause TEXT)",
  );
  const insert = db.prepare("INSERT INTO auth_credentials VALUES (?, ?, ?, ?, ?)");
  insert.run(
    1,
    "openai-codex",
    "oauth",
    JSON.stringify({ access: "fixture-omp", accountId: "omp-account", expires: 2000 }),
    null,
  );
  insert.run(
    2,
    "openai-codex",
    "oauth",
    JSON.stringify({ access: "fixture-expired", expires: 500 }),
    null,
  );
  insert.run(
    3,
    "openai-codex",
    "oauth",
    JSON.stringify({ access: "fixture-disabled", expires: 2000 }),
    "revoked",
  );
  insert.run(
    4,
    "openai-codex",
    "api_key",
    JSON.stringify({ access: "fixture-key", expires: 2000 }),
    null,
  );
  insert.run(5, "openai-codex", "oauth", "invalid", null);
  db.exec("COMMIT");
  db.close();
}

async function opencodeDatabase(path: string) {
  await mkdir((await import("node:path")).dirname(path), { recursive: true });
  const { DatabaseSync } = await import("node:sqlite");
  const db = new DatabaseSync(path);
  db.exec(
    "CREATE TABLE credential (id TEXT PRIMARY KEY, integration_id TEXT, label TEXT, value TEXT, connector_id TEXT, method_id TEXT, active INTEGER, time_created INTEGER, time_updated INTEGER)",
  );
  return db;
}

function opencodeOauth(access: string, expires: number, accountId?: string) {
  return JSON.stringify({
    type: "oauth",
    methodID: "chatgpt-headless",
    access,
    refresh: "fixture-refresh",
    expires,
    ...(accountId ? { metadata: { accountID: accountId } } : {}),
  });
}

test("Pi uses its own OAuth identity and re-reads rotated tokens without writing", async () => {
  const path = join(home, ".pi", "agent", "auth.json");
  await json(path, {
    "openai-codex": { type: "oauth", access: "fixture-first", accountId: "pi-account" },
  });
  await json(join(home, ".claude.json"), {
    oauthAccount: { accountUuid: "other", organizationUuid: "other-org" },
  });
  const inputs = await logins(lookup());
  expect(inputs).toHaveLength(1);
  expect(await accountIdentity(inputs[0]!)).toEqual({ key: "pi-account" });
  await json(path, {
    "openai-codex": { type: "oauth", access: "fixture-rotated", accountId: "pi-account" },
  });
  const before = await readFile(path, "utf8");
  expect(
    (
      await fetchUsage(
        inputs[0]!,
        async (_url, init) => {
          expect(new Headers(init?.headers).get("Authorization")).toBe("Bearer fixture-rotated");
          return new Response("{}", { status: 401 });
        },
        lookup(),
      )
    ).status,
  ).toBe("unavailable");
  expect(await readFile(path, "utf8")).toBe(before);
});

test("Pi honors directory override and ignores API keys and malformed files", async () => {
  const directory = join(home, "custom-pi");
  const env = { PI_CODING_AGENT_DIR: directory };
  const path = join(directory, "auth.json");
  await json(path, {
    "openai-codex": { type: "oauth", access: "fixture-pi", accountId: "pi-account" },
  });
  expect(await logins(lookup(env))).toEqual([{ route: { store: "pi", path } }]);
  await json(path, { "openai-codex": { type: "api_key", key: "fixture-key" } });
  expect(await logins(lookup(env))).toEqual([]);
  await writeFile(path, "broken");
  expect(await logins(lookup(env))).toEqual([]);
});

test("expired Pi tokens are unavailable without calling usage or refreshing", async () => {
  await json(join(home, ".pi", "agent", "auth.json"), {
    "openai-codex": {
      type: "oauth",
      access: "fixture-expired",
      accountId: "pi-account",
      expires: 500,
    },
  });
  const [input] = await logins(lookup());
  expect(
    (
      await fetchUsage(
        input!,
        async () => {
          throw new Error("must not fetch expired token");
        },
        lookup(),
      )
    ).status,
  ).toBe("unavailable");
});

for (const location of ["default", "profile", "xdg", "override", "config"]) {
  test(`OMP discovers enabled live OAuth rows in ${location} store read-only`, async () => {
    let path = join(home, ".omp", "agent", "agent.db");
    let env: NodeJS.ProcessEnv = { OMP_AUTH_BROKER_URL: "https://broker.test" };
    if (location === "profile") {
      env.OMP_PROFILE = "work";
      path = join(home, ".omp", "profiles", "work", "agent", "agent.db");
    }
    if (location === "xdg") {
      env.XDG_DATA_HOME = join(home, "data");
      env.PI_PROFILE = "work";
      path = join(home, "data", "omp", "profiles", "work", "agent.db");
    }
    if (location === "override") {
      env.PI_CODING_AGENT_DIR = join(home, "custom");
      path = join(home, "custom", "agent.db");
    }
    if (location === "config") {
      env.PI_CONFIG_DIR = "custom-config";
      path = join(home, "custom-config", "agent", "agent.db");
    }
    await database(path);
    const before = await readFile(path);
    const inputs = await logins(lookup(env));
    expect(inputs).toEqual([
      { route: { store: "omp", path, credentialId: 1 } },
      { route: { store: "omp", path, credentialId: 2 } },
    ]);
    expect(await accountIdentity(inputs[0]!, env)).toEqual({ key: "omp-account" });
    expect(
      (
        await fetchUsage(
          inputs[0]!,
          async (_url, init) => {
            expect(new Headers(init?.headers).get("Authorization")).toBe("Bearer fixture-omp");
            return new Response("{}", { status: 401 });
          },
          lookup(env),
        )
      ).status,
    ).toBe("unavailable");
    expect(await readFile(path)).toEqual(before);
  });
}

test("missing SQLite skips only OMP", async () => {
  await database(join(home, ".omp", "agent", "agent.db"));
  await json(join(home, ".pi", "agent", "auth.json"), {
    "openai-codex": { type: "oauth", access: "fixture-pi" },
  });
  const inputs = await logins({ ...lookup(), sqlite: () => undefined });
  expect(inputs).toEqual([
    { route: { store: "pi", path: join(home, ".pi", "agent", "auth.json") } },
  ]);
});

test("Codex and OpenCode discover accounts in preference order with XDG and CODEX_HOME", async () => {
  const codex = join(home, "codex");
  const data = join(home, "data");
  const env = { CODEX_HOME: codex, XDG_DATA_HOME: data };
  await json(join(codex, "auth.json"), {
    tokens: { access_token: "fixture-codex", account_id: "same" },
  });
  // Codex CLI never reads ~/.config/codex.
  await json(join(home, ".config", "codex", "auth.json"), {
    tokens: { access_token: "fixture-config", account_id: "same" },
  });
  await json(join(home, ".codex", "auth.json"), {
    tokens: { access_token: "fixture-legacy", account_id: "same" },
  });
  await json(join(data, "opencode", "auth.json"), {
    openai: { type: "oauth", access: "fixture-open", accountId: "same" },
  });
  const inputs = await logins(lookup(env));
  expect(inputs.map((input) => input.route.store)).toEqual(["codex", "codex", "opencode"]);
  for (const input of inputs) expect(await accountIdentity(input, env)).toEqual({ key: "same" });
  await json(join(data, "opencode", "auth.json"), { openai: { type: "api", key: "fixture-key" } });
  expect(await logins(lookup(env))).toHaveLength(2);
});

test("OMP fetch re-reads its row after rotation and skips a newly disabled login", async () => {
  const path = join(home, ".omp", "agent", "agent.db");
  await database(path);
  const [input] = await logins(lookup());
  const { DatabaseSync } = await import("node:sqlite");
  const db = new DatabaseSync(path);
  db.prepare("UPDATE auth_credentials SET data = ? WHERE id = 1").run(
    JSON.stringify({ access: "fixture-rotated-omp", accountId: "omp-account", expires: 2000 }),
  );
  expect(
    (
      await fetchUsage(
        input!,
        async (_url, init) => {
          expect(new Headers(init?.headers).get("Authorization")).toBe(
            "Bearer fixture-rotated-omp",
          );
          return new Response("{}", { status: 401 });
        },
        lookup(),
      )
    ).status,
  ).toBe("unavailable");
  db.prepare("UPDATE auth_credentials SET disabled_cause = 'revoked' WHERE id = 1").run();
  db.close();
  await expect(
    fetchUsage(
      input!,
      async () => {
        throw new Error("must not fetch");
      },
      lookup(),
    ),
  ).rejects.toThrow("login store no longer exists");
});

function opencodeUsageResponse() {
  return Response.json({
    plan_type: "plus",
    rate_limit: {
      primary_window: { used_percent: 30, limit_window_seconds: 18000 },
      secondary_window: { used_percent: 81, limit_window_seconds: 604800 },
    },
  });
}

test("OpenCode v2 database login replaces a stale v1 file login", async () => {
  const data = join(home, "data");
  const env = { XDG_DATA_HOME: data };
  const databasePath = join(data, "opencode", "opencode.db");
  await json(join(data, "opencode", "auth.json"), {
    openai: { type: "oauth", access: "fixture-expired", expires: 500 },
  });
  const db = await opencodeDatabase(databasePath);
  db.prepare("INSERT INTO credential VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)").run(
    "cred_1",
    "openai",
    "OpenAI",
    opencodeOauth("fixture-db", 2000, "db-account"),
    null,
    "chatgpt-headless",
    1,
    1,
    1,
  );
  db.close();

  const inputs = await logins(lookup(env));
  expect(inputs).toEqual([
    { route: { store: "opencode-db", path: databasePath, credentialId: "cred_1" } },
  ]);
  expect(await accountIdentity(inputs[0]!, env)).toEqual({ key: "db-account" });
  const report = await fetchUsage(
    inputs[0]!,
    async (_url, init) => {
      const headers = new Headers(init?.headers);
      expect(headers.get("Authorization")).toBe("Bearer fixture-db");
      expect(headers.get("ChatGPT-Account-Id")).toBe("db-account");
      return opencodeUsageResponse();
    },
    lookup(env),
  );
  expect(report).toMatchObject({
    status: "available",
    planLabel: "plus",
    windows: [
      { id: "five_hour", usedPct: 30 },
      { id: "weekly", usedPct: 81 },
    ],
  });
});

test("OpenCode v2 database login with an expired token is unavailable without a request", async () => {
  const data = join(home, "data");
  const env = { XDG_DATA_HOME: data };
  const databasePath = join(data, "opencode", "opencode.db");
  const db = await opencodeDatabase(databasePath);
  db.prepare("INSERT INTO credential VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)").run(
    "cred_1",
    "openai",
    "OpenAI",
    opencodeOauth("fixture-expired", 500, "db-account"),
    null,
    "chatgpt-headless",
    1,
    1,
    1,
  );
  db.close();

  const [input] = await logins(lookup(env));
  expect(
    await fetchUsage(
      input!,
      async () => {
        throw new Error("must not fetch an expired token");
      },
      lookup(env),
    ),
  ).toEqual({
    status: "unavailable",
    problem: { kind: "expired", expiresAt: new Date(500).toISOString(), refreshedBy: "opencode" },
  });
});

test("OpenCode v2 database is unchanged after its login is read", async () => {
  const data = join(home, "data");
  const env = { XDG_DATA_HOME: data };
  const databasePath = join(data, "opencode", "opencode.db");
  const db = await opencodeDatabase(databasePath);
  db.prepare("INSERT INTO credential VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)").run(
    "cred_1",
    "openai",
    "OpenAI",
    opencodeOauth("fixture-db", 2000, "db-account"),
    null,
    "chatgpt-headless",
    1,
    1,
    1,
  );
  db.close();
  const before = await readFile(databasePath);

  const [input] = await logins(lookup(env));
  await fetchUsage(input!, async () => opencodeUsageResponse(), lookup(env));
  expect(await readFile(databasePath)).toEqual(before);
});

test("OpenCode v2 database login is re-read after the stored token rotates", async () => {
  const data = join(home, "data");
  const env = { XDG_DATA_HOME: data };
  const databasePath = join(data, "opencode", "opencode.db");
  const db = await opencodeDatabase(databasePath);
  db.prepare("INSERT INTO credential VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)").run(
    "cred_1",
    "openai",
    "OpenAI",
    opencodeOauth("fixture-first", 2000, "db-account"),
    null,
    "chatgpt-headless",
    1,
    1,
    1,
  );
  db.close();

  const [input] = await logins(lookup(env));
  const { DatabaseSync } = await import("node:sqlite");
  const writer = new DatabaseSync(databasePath);
  writer
    .prepare("UPDATE credential SET value = ? WHERE id = 'cred_1'")
    .run(opencodeOauth("fixture-rotated", 2000, "db-account"));
  writer.close();

  const report = await fetchUsage(
    input!,
    async (_url, init) => {
      expect(new Headers(init?.headers).get("Authorization")).toBe("Bearer fixture-rotated");
      return opencodeUsageResponse();
    },
    lookup(env),
  );
  expect(report.status).toBe("available");
});

test.each([
  ["there is no v2 database", null],
  [
    "the v2 database holds no OpenAI login",
    { integration: "zenai", value: JSON.stringify({ type: "key", key: "fixture-key" }) },
  ],
  [
    "the v2 OpenAI login is not active",
    {
      integration: "openai",
      value: opencodeOauth("fixture-inactive", 2000, "db-account"),
      active: 0,
    },
  ],
])("OpenCode v1 file login stays when %s", async (_name, row) => {
  const data = join(home, "data");
  const env = { XDG_DATA_HOME: data };
  const file = join(data, "opencode", "auth.json");
  await json(file, { openai: { type: "oauth", access: "fixture-file", expires: 2000 } });
  if (row) {
    const databasePath = join(data, "opencode", "opencode.db");
    const db = await opencodeDatabase(databasePath);
    db.prepare("INSERT INTO credential VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)").run(
      "cred_1",
      row.integration,
      "OpenAI",
      row.value,
      null,
      "chatgpt-headless",
      "active" in row ? row.active : 1,
      1,
      1,
    );
    db.close();
  }
  expect(await logins(lookup(env))).toEqual([{ route: { store: "opencode", path: file } }]);
});

test.each(["absolute", "relative"])(
  "OpenCode v2 database path honours %s OPENCODE_DB",
  async (kind) => {
    const data = join(home, "data");
    const databasePath = join(data, "opencode", "custom-opencode.db");
    const db = await opencodeDatabase(databasePath);
    db.prepare("INSERT INTO credential VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)").run(
      "cred_1",
      "openai",
      "OpenAI",
      opencodeOauth("fixture-db", 2000, "db-account"),
      null,
      "chatgpt-headless",
      1,
      1,
      1,
    );
    db.close();
    expect(
      await logins(
        lookup({
          XDG_DATA_HOME: data,
          OPENCODE_DB: kind === "absolute" ? databasePath : "custom-opencode.db",
        }),
      ),
    ).toEqual([{ route: { store: "opencode-db", path: databasePath, credentialId: "cred_1" } }]);
  },
);

test.each([false, true])(
  "OpenCode v2 selects its current login after legacy migration (explicit selection: %s)",
  async (selected) => {
    const data = join(home, "data");
    const env = { XDG_DATA_HOME: data };
    const databasePath = join(data, "opencode", "opencode.db");
    const db = await opencodeDatabase(databasePath);
    const insert = db.prepare("INSERT INTO credential VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)");
    // The v1 migration leaves active NULL; OpenCode uses creation order until a login is selected.
    insert.run(
      "older",
      "openai",
      "OpenAI",
      opencodeOauth("fixture-older", 2000, "older-account"),
      null,
      "chatgpt-headless",
      selected ? 1 : null,
      1,
      3,
    );
    insert.run(
      "newer",
      "openai",
      "OpenAI",
      opencodeOauth("fixture-newer", 2000, "newer-account"),
      null,
      "chatgpt-headless",
      null,
      2,
      2,
    );
    db.close();

    const inputs = await logins(lookup(env));
    expect(inputs).toEqual([
      {
        route: {
          store: "opencode-db",
          path: databasePath,
          credentialId: selected ? "older" : "newer",
        },
      },
    ]);
    expect(await accountIdentity(inputs[0]!, env)).toEqual({
      key: selected ? "older-account" : "newer-account",
    });
  },
);