import os
import tempfile
import unittest
from datetime import date

from werkzeug.security import generate_password_hash

from app import create_app
from app.database import get_db, init_db


class AppTestCase(unittest.TestCase):
    def setUp(self):
        self.db_fd, self.db_path = tempfile.mkstemp()
        self.app = create_app(
            {
                "TESTING": True,
                "DATABASE": self.db_path,
                "SECRET_KEY": "test-secret",
            }
        )

        with self.app.app_context():
            init_db()
            db = get_db()
            db.execute(
                """
                INSERT INTO admins (username, password_hash)
                VALUES (?, ?)
                """,
                ("admin", generate_password_hash("password")),
            )
            db.commit()

        self.client = self.app.test_client()

    def tearDown(self):
        os.close(self.db_fd)
        os.unlink(self.db_path)

    def seed_question(self, question_date=None):
        if question_date is None:
            question_date = date.today().isoformat()

        with self.app.app_context():
            db = get_db()
            db.execute(
                """
                INSERT INTO questions (question, option_a, option_b, date)
                VALUES (?, ?, ?, ?)
                """,
                ("Would you rather test A or test B?", "Test A", "Test B", question_date),
            )
            db.commit()

    def login(self):
        return self.client.post(
            "/admin/login",
            data={"username": "admin", "password": "password"},
            follow_redirects=True,
        )

    def test_public_empty_state(self):
        response = self.client.get("/")

        self.assertEqual(response.status_code, 200)
        self.assertIn(b"No question is scheduled yet.", response.data)

    def test_voting_flow_blocks_duplicate_vote(self):
        self.seed_question()

        first = self.client.post("/vote", data={"qid": "1", "vote": "A"})
        second = self.client.post("/vote", data={"qid": "1", "vote": "A"})

        self.assertEqual(first.status_code, 302)
        self.assertEqual(second.status_code, 302)

        with self.app.app_context():
            count = get_db().execute("SELECT COUNT(*) FROM votes").fetchone()[0]

        self.assertEqual(count, 1)

    def test_homepage_uses_todays_question_only(self):
        self.seed_question("2030-01-01")
        response = self.client.get("/")

        self.assertIn(b"No question is scheduled yet.", response.data)

        self.seed_question()
        response = self.client.get("/")

        self.assertIn(b"Would you rather test A or test B?", response.data)

    def test_vote_rejects_non_today_question(self):
        self.seed_question("2030-01-01")

        response = self.client.post("/vote", data={"qid": "1", "vote": "A"})

        self.assertEqual(response.status_code, 302)

        with self.app.app_context():
            count = get_db().execute("SELECT COUNT(*) FROM votes").fetchone()[0]

        self.assertEqual(count, 0)

    def test_admin_login_success_and_failure(self):
        failed = self.client.post(
            "/admin/login",
            data={"username": "admin", "password": "wrong"},
        )
        self.assertIn(b"Invalid username or password.", failed.data)

        success = self.login()
        self.assertIn(b"Questions", success.data)

    def test_protected_route_redirects_to_login(self):
        response = self.client.get("/admin/dashboard")

        self.assertEqual(response.status_code, 302)
        self.assertIn("/admin/login", response.headers["Location"])

    def test_question_create_duplicate_date_failure(self):
        self.seed_question()
        self.login()

        response = self.client.post(
            "/admin/question/new",
            data={
                "date": date.today().isoformat(),
                "question": "Another question?",
                "option_a": "A",
                "option_b": "B",
            },
        )

        self.assertIn(b"Date already has a question.", response.data)

    def test_admin_can_change_credentials(self):
        self.login()

        response = self.client.post(
            "/admin/account",
            data={
                "username": "newadmin",
                "current_password": "password",
                "new_password": "new-password",
                "confirm_password": "new-password",
            },
            follow_redirects=True,
        )

        self.assertIn(b"Admin credentials updated.", response.data)

        self.client.get("/admin/logout")

        old_login = self.client.post(
            "/admin/login",
            data={"username": "admin", "password": "password"},
        )
        self.assertIn(b"Invalid username or password.", old_login.data)

        new_login = self.client.post(
            "/admin/login",
            data={"username": "newadmin", "password": "new-password"},
            follow_redirects=True,
        )
        self.assertIn(b"Questions", new_login.data)

    def test_admin_account_requires_current_password(self):
        self.login()

        response = self.client.post(
            "/admin/account",
            data={
                "username": "newadmin",
                "current_password": "wrong",
                "new_password": "new-password",
                "confirm_password": "new-password",
            },
        )

        self.assertIn(b"Current password is incorrect.", response.data)


if __name__ == "__main__":
    unittest.main()