import sqlite3
from app import create_app

# =====================================================
# Helpers
# =====================================================

def fetch_one(db_path: str, sql: str, params=()):
    con = sqlite3.connect(db_path)
    try:
        return con.execute(sql, params).fetchone()
    finally:
        con.close()


def fetch_all(db_path: str, sql: str, params=()):
    con = sqlite3.connect(db_path)
    try:
        return con.execute(sql, params).fetchall()
    finally:
        con.close()


# =====================================================
# Tests
# =====================================================

def test_dashboard_loads(tmp_path):
    db_path = tmp_path / "test.db"
    app = create_app({"TESTING": True, "DB_PATH": str(db_path)})
    client = app.test_client()

    resp = client.get("/dashboard")
    assert resp.status_code == 200


def test_create_todo_inserts_row(tmp_path):
    db_path = tmp_path / "test.db"
    app = create_app({"TESTING": True, "DB_PATH": str(db_path)})
    client = app.test_client()

    resp = client.post(
        "/todo/create",
        data={"title": "Test", "description": "Desc", "status": "not-started"},
        follow_redirects=True,
    )
    assert resp.status_code == 200

    row = fetch_one(str(db_path), "SELECT title, description, status FROM todo")
    assert row == ("Test", "Desc", "not-started")


def test_create_requires_fields(tmp_path):
    db_path = tmp_path / "test.db"
    app = create_app({"TESTING": True, "DB_PATH": str(db_path)})
    client = app.test_client()

    resp = client.post(
        "/todo/create",
        data={"title": "", "description": "", "status": "not-started"},
        follow_redirects=True,
    )
    assert resp.status_code == 200

    row = fetch_one(str(db_path), "SELECT COUNT(*) FROM todo")
    assert row[0] == 0


def test_invalid_status_is_rejected_on_update(tmp_path):
    db_path = tmp_path / "test.db"
    app = create_app({"TESTING": True, "DB_PATH": str(db_path)})
    client = app.test_client()

    # skapa en todo
    client.post("/todo/create", data={"title": "A", "description": "B", "status": "not-started"})

    todo_id = fetch_one(str(db_path), "SELECT id FROM todo")[0]

    resp = client.post(
        f"/todo/{todo_id}/status",
        data={"status": "hax-status"},
        follow_redirects=True,
    )
    assert resp.status_code == 200

    # status ska vara kvar som innan
    status = fetch_one(str(db_path), "SELECT status FROM todo WHERE id=?", (todo_id,))[0]
    assert status == "not-started"


def test_update_status_to_done(tmp_path):
    db_path = tmp_path / "test.db"
    app = create_app({"TESTING": True, "DB_PATH": str(db_path)})
    client = app.test_client()

    client.post("/todo/create", data={"title": "A", "description": "B", "status": "not-started"})
    todo_id = fetch_one(str(db_path), "SELECT id FROM todo")[0]

    resp = client.post(
        f"/todo/{todo_id}/status",
        data={"status": "done"},
        follow_redirects=True,
    )
    assert resp.status_code == 200

    status, edited = fetch_one(str(db_path), "SELECT status, edited FROM todo WHERE id=?", (todo_id,))
    assert status == "done"
    assert edited is not None


def test_delete_todo(tmp_path):
    db_path = tmp_path / "test.db"
    app = create_app({"TESTING": True, "DB_PATH": str(db_path)})
    client = app.test_client()

    client.post("/todo/create", data={"title": "A", "description": "B", "status": "not-started"})
    todo_id = fetch_one(str(db_path), "SELECT id FROM todo")[0]

    resp = client.post(
        f"/todo/{todo_id}/delete",
        follow_redirects=True,
    )
    assert resp.status_code == 200

    row = fetch_one(str(db_path), "SELECT COUNT(*) FROM todo")
    assert row[0] == 0

def test_dashboard_lists_created_todo(tmp_path):
    db_path = tmp_path / "test.db"
    app = create_app({"TESTING": True, "DB_PATH": str(db_path)})
    client = app.test_client()

    client.post("/todo/create", data={"title": "X", "description": "Y", "status": "not-started"})
    resp = client.get("/dashboard")
    assert resp.status_code == 200
    assert b"X" in resp.data
    assert b"Y" in resp.data


def test_create_invalid_status_defaults_to_not_started(tmp_path):
    db_path = tmp_path / "test.db"
    app = create_app({"TESTING": True, "DB_PATH": str(db_path)})
    client = app.test_client()

    client.post("/todo/create", data={"title": "T", "description": "D", "status": "weird"})
    row = fetch_one(str(db_path), "SELECT status FROM todo")
    assert row[0] == "not-started"


def test_delete_nonexistent_does_not_crash(tmp_path):
    db_path = tmp_path / "test.db"
    app = create_app({"TESTING": True, "DB_PATH": str(db_path)})
    client = app.test_client()

    resp = client.post("/todo/999/delete", follow_redirects=True)
    assert resp.status_code == 200


def test_update_nonexistent_does_not_crash(tmp_path):
    db_path = tmp_path / "test.db"
    app = create_app({"TESTING": True, "DB_PATH": str(db_path)})
    client = app.test_client()

    resp = client.post("/todo/999/status", data={"status": "done"}, follow_redirects=True)
    assert resp.status_code == 200