import importlib

import pytest
from fastapi.testclient import TestClient


def _reload_app(tmp_path, monkeypatch, **env):
    import editor_app.config as config
    import editor_app.db.session as db_sess
    import editor_app.main as main

    monkeypatch.setenv("WORKSPACE_ROOT", str(tmp_path))
    monkeypatch.setenv("AUTH_DATABASE_PATH", str(tmp_path / "auth.db"))
    monkeypatch.setenv("AUTH_REGISTER_OPEN", "true")
    monkeypatch.setenv("AUTH_INVITE_ONLY", "false")
    monkeypatch.delenv("EDITOR_API_KEY", raising=False)
    monkeypatch.delenv("BOOTSTRAP_ADMIN_USERNAME", raising=False)
    monkeypatch.delenv("BOOTSTRAP_ADMIN_PASSWORD", raising=False)
    for k, v in env.items():
        monkeypatch.setenv(k, v)
    config.WORKSPACE_ROOT = tmp_path
    db_sess.reset_engine()
    importlib.reload(main)
    return main.app


def test_auth_status_public(tmp_path, monkeypatch):
    with TestClient(_reload_app(tmp_path, monkeypatch, AUTH_ENABLED="false")) as client:
        r = client.get("/api/auth/status")
        assert r.status_code == 200
        assert r.json() == {"auth_enabled": False, "register_open": True, "invite_required": False}


def test_register_login_and_api_access(tmp_path, monkeypatch):
    with TestClient(
        _reload_app(tmp_path, monkeypatch, AUTH_ENABLED="true", AUTH_REGISTER_OPEN="true")
    ) as client:
        assert client.get("/api/files").status_code == 401

        reg = client.post("/api/auth/register", json={"username": "alice", "password": "hunter2000"})
        assert reg.status_code == 200
        body = reg.json()
        assert body["username"] == "alice"
        assert body["is_superuser"] is True

        login = client.post("/api/auth/login", json={"username": "alice", "password": "hunter2000"})
        assert login.status_code == 200

        ok = client.get("/api/files")
        assert ok.status_code == 200

        me = client.get("/api/auth/me")
        assert me.status_code == 200
        assert me.json()["user"]["username"] == "alice"

        out = client.post("/api/auth/logout")
        assert out.status_code == 200
        assert client.get("/api/files").status_code == 401


def test_second_user_not_superuser(tmp_path, monkeypatch):
    with TestClient(
        _reload_app(tmp_path, monkeypatch, AUTH_ENABLED="true", AUTH_REGISTER_OPEN="true")
    ) as client:
        r1 = client.post("/api/auth/register", json={"username": "usr1", "password": "password99"})
        assert r1.status_code == 200
        assert r1.json()["is_superuser"] is True
        r2 = client.post("/api/auth/register", json={"username": "usr2", "password": "password99"})
        assert r2.status_code == 200
        assert r2.json()["is_superuser"] is False


def test_register_duplicate_username(tmp_path, monkeypatch):
    with TestClient(
        _reload_app(tmp_path, monkeypatch, AUTH_ENABLED="true", AUTH_REGISTER_OPEN="true")
    ) as client:
        assert client.post("/api/auth/register", json={"username": "dupuser", "password": "password99"}).status_code == 200
        dup = client.post("/api/auth/register", json={"username": "dupuser", "password": "otherpass1"})
        assert dup.status_code == 409


def test_register_closed(tmp_path, monkeypatch):
    with TestClient(
        _reload_app(tmp_path, monkeypatch, AUTH_ENABLED="true", AUTH_REGISTER_OPEN="false")
    ) as client:
        r = client.post("/api/auth/register", json={"username": "bob", "password": "password99"})
        assert r.status_code == 403


def test_admin_can_create_invite_and_register_with_token(tmp_path, monkeypatch):
    with TestClient(
        _reload_app(tmp_path, monkeypatch, AUTH_ENABLED="true", AUTH_REGISTER_OPEN="true")
    ) as client:
        client.post("/api/auth/register", json={"username": "admin", "password": "password99", "invite_token": None})
        client.post("/api/auth/login", json={"username": "admin", "password": "password99"})
        invite = client.post("/api/users/invites", json={"email": "newuser@example.com", "expires_days": 7})
        assert invite.status_code == 200
        invite_url = invite.json()["invite_url"]
        token = invite_url.split("invite=", 1)[1]
        client.post("/api/auth/logout")

        reg = client.post(
            "/api/auth/register",
            json={"username": "newuser", "password": "password99", "invite_token": token},
        )
        assert reg.status_code == 200
        assert reg.json()["username"] == "newuser"


def test_admin_can_create_link_only_invite(tmp_path, monkeypatch):
    with TestClient(
        _reload_app(tmp_path, monkeypatch, AUTH_ENABLED="true", AUTH_REGISTER_OPEN="true")
    ) as client:
        client.post("/api/auth/register", json={"username": "admin", "password": "password99", "invite_token": None})
        client.post("/api/auth/login", json={"username": "admin", "password": "password99"})
        invite = client.post("/api/users/invites", json={"email": None, "expires_days": 7})
        assert invite.status_code == 200
        body = invite.json()
        assert body["invite_url"].startswith("http://")
        assert body["delivered"] is False


def test_invite_required_blocks_public_register(tmp_path, monkeypatch):
    with TestClient(
        _reload_app(
            tmp_path,
            monkeypatch,
            AUTH_ENABLED="true",
            AUTH_REGISTER_OPEN="true",
            AUTH_INVITE_ONLY="true",
        )
    ) as client:
        blocked = client.post("/api/auth/register", json={"username": "plain", "password": "password99"})
        assert blocked.status_code == 403


def test_superuser_lists_and_creates_users(tmp_path, monkeypatch):
    with TestClient(
        _reload_app(tmp_path, monkeypatch, AUTH_ENABLED="true", AUTH_REGISTER_OPEN="true")
    ) as client:
        client.post("/api/auth/register", json={"username": "admin", "password": "password99"})
        client.post("/api/auth/login", json={"username": "admin", "password": "password99"})

        listed = client.get("/api/users")
        assert listed.status_code == 200
        assert len(listed.json()) == 1

        created = client.post(
            "/api/users",
            json={"username": "sub", "password": "password99", "is_superuser": False},
        )
        assert created.status_code == 200
        assert created.json()["username"] == "sub"
        assert created.json()["is_superuser"] is False

        names = {u["username"] for u in client.get("/api/users").json()}
        assert names == {"admin", "sub"}


def test_non_superuser_cannot_list_users(tmp_path, monkeypatch):
    with TestClient(
        _reload_app(tmp_path, monkeypatch, AUTH_ENABLED="true", AUTH_REGISTER_OPEN="true")
    ) as client:
        client.post("/api/auth/register", json={"username": "boss", "password": "password99"})
        client.post("/api/auth/login", json={"username": "boss", "password": "password99"})
        client.post("/api/auth/logout")
        client.post("/api/auth/register", json={"username": "peon", "password": "password99"})
        client.post("/api/auth/login", json={"username": "peon", "password": "password99"})
        denied = client.get("/api/users")
        assert denied.status_code == 403


def test_users_have_isolated_workspaces(tmp_path, monkeypatch):
    with TestClient(
        _reload_app(tmp_path, monkeypatch, AUTH_ENABLED="true", AUTH_REGISTER_OPEN="true")
    ) as client:
        client.post("/api/auth/register", json={"username": "alice", "password": "password99"})
        client.post("/api/auth/logout")
        client.post("/api/auth/register", json={"username": "bob", "password": "password99"})
        client.post("/api/auth/logout")

        client.post("/api/auth/login", json={"username": "alice", "password": "password99"})
        save = client.post("/api/file/code/only_alice.py", json={"content": "owner = 'alice'\n"})
        assert save.status_code == 200
        client.post("/api/auth/logout")

        client.post("/api/auth/login", json={"username": "bob", "password": "password99"})
        missing = client.get("/api/file/code/only_alice.py")
        assert missing.status_code == 404
        listing = client.get("/api/files", params={"path": "code"})
        assert listing.status_code == 200
        names = {item["name"] for item in listing.json()["files"]}
        assert "only_alice.py" not in names


def test_lib_is_shared_read_only_across_users(tmp_path, monkeypatch):
    shared_lib = tmp_path / "lib"
    shared_lib.mkdir(parents=True, exist_ok=True)
    (shared_lib / "shared.py").write_text("VALUE = 42\n", encoding="utf-8")

    with TestClient(
        _reload_app(tmp_path, monkeypatch, AUTH_ENABLED="true", AUTH_REGISTER_OPEN="true")
    ) as client:
        client.post("/api/auth/register", json={"username": "alice", "password": "password99"})
        client.post("/api/auth/logout")
        client.post("/api/auth/register", json={"username": "bob", "password": "password99"})
        client.post("/api/auth/logout")

        client.post("/api/auth/login", json={"username": "alice", "password": "password99"})
        lib_read = client.get("/api/file/lib/shared.py")
        assert lib_read.status_code == 200
        assert "VALUE = 42" in lib_read.json()["content"]
        lib_write = client.post("/api/file/lib/shared.py", json={"content": "VALUE = 0\n"})
        assert lib_write.status_code == 403
        client.post("/api/auth/logout")

        client.post("/api/auth/login", json={"username": "bob", "password": "password99"})
        lib_read_bob = client.get("/api/file/lib/shared.py")
        assert lib_read_bob.status_code == 200
        assert "VALUE = 42" in lib_read_bob.json()["content"]


def test_superuser_can_open_other_user_workspace(tmp_path, monkeypatch):
    with TestClient(
        _reload_app(tmp_path, monkeypatch, AUTH_ENABLED="true", AUTH_REGISTER_OPEN="true")
    ) as client:
        client.post("/api/auth/register", json={"username": "admin", "password": "password99"})
        client.post("/api/auth/logout")
        client.post("/api/auth/register", json={"username": "bob", "password": "password99"})
        client.post("/api/auth/logout")

        client.post("/api/auth/login", json={"username": "bob", "password": "password99"})
        me = client.get("/api/auth/me").json()
        bob_id = me["user"]["id"]
        client.post("/api/file/code/bob_only.py", json={"content": "owner='bob'\n"})
        client.post("/api/auth/logout")

        client.post("/api/auth/login", json={"username": "admin", "password": "password99"})
        as_bob = client.get("/api/file/code/bob_only.py", params={"workspace_user_id": bob_id})
        assert as_bob.status_code == 200
        assert "owner='bob'" in as_bob.json()["content"]


def test_non_admin_cannot_override_workspace_user(tmp_path, monkeypatch):
    with TestClient(
        _reload_app(tmp_path, monkeypatch, AUTH_ENABLED="true", AUTH_REGISTER_OPEN="true")
    ) as client:
        client.post("/api/auth/register", json={"username": "admin", "password": "password99"})
        client.post("/api/auth/logout")
        client.post("/api/auth/register", json={"username": "alice", "password": "password99"})
        client.post("/api/auth/logout")
        client.post("/api/auth/register", json={"username": "bob", "password": "password99"})
        client.post("/api/auth/logout")

        client.post("/api/auth/login", json={"username": "alice", "password": "password99"})
        denied = client.get("/api/files", params={"workspace_user_id": 1})
        assert denied.status_code == 403


def test_login_serves_page(client):
    r = client.get("/login")
    assert r.status_code == 200
    assert "Sign in" in r.text


def test_register_serves_page(client):
    r = client.get("/register")
    assert r.status_code == 200
    assert "Create account" in r.text