"""
Tests for authentication: signup, login, /me.
"""


class TestSignup:
    def test_signup_success(self, client):
        resp = client.post("/api/auth/signup", json={
            "username": "newuser",
            "email": "new@example.com",
            "password": "securepass",
        })
        assert resp.status_code == 201
        data = resp.json()
        assert "access_token" in data
        assert data["token_type"] == "bearer"

    def test_signup_duplicate_username(self, client):
        payload = {
            "username": "dupuser",
            "email": "dup1@example.com",
            "password": "pass123",
        }
        client.post("/api/auth/signup", json=payload)

        # Try again with same username
        resp = client.post("/api/auth/signup", json={
            "username": "dupuser",
            "email": "dup2@example.com",
            "password": "pass123",
        })
        assert resp.status_code == 409

    def test_signup_duplicate_email(self, client):
        client.post("/api/auth/signup", json={
            "username": "user1",
            "email": "same@example.com",
            "password": "pass123",
        })
        resp = client.post("/api/auth/signup", json={
            "username": "user2",
            "email": "same@example.com",
            "password": "pass123",
        })
        assert resp.status_code == 409


class TestLogin:
    def test_login_success(self, client):
        client.post("/api/auth/signup", json={
            "username": "loginuser",
            "email": "login@example.com",
            "password": "mypassword",
        })
        resp = client.post("/api/auth/login", json={
            "username": "loginuser",
            "password": "mypassword",
        })
        assert resp.status_code == 200
        assert "access_token" in resp.json()

    def test_login_wrong_password(self, client):
        client.post("/api/auth/signup", json={
            "username": "wrongpw",
            "email": "wrongpw@example.com",
            "password": "correctpass",
        })
        resp = client.post("/api/auth/login", json={
            "username": "wrongpw",
            "password": "wrongpassword",
        })
        assert resp.status_code == 401

    def test_login_nonexistent_user(self, client):
        resp = client.post("/api/auth/login", json={
            "username": "ghost",
            "password": "nope",
        })
        assert resp.status_code == 401


class TestMe:
    def test_me_returns_user(self, client, auth_headers):
        resp = client.get("/api/auth/me", headers=auth_headers)
        assert resp.status_code == 200
        data = resp.json()
        assert data["username"] == "testuser"
        assert data["email"] == "test@example.com"
        assert "id" in data

    def test_me_requires_auth(self, client):
        resp = client.get("/api/auth/me")
        assert resp.status_code in (401, 403)

    def test_me_rejects_bad_token(self, client):
        resp = client.get("/api/auth/me", headers={
            "Authorization": "Bearer invalid.token.here"
        })
        assert resp.status_code == 401