import db


DEFAULT_CHANNELS = [
    ("stable", "正式版", 1, 10),
    ("preview", "预览版", 1, 20),
    ("dev", "开发版", 1, 30),
]


def list_apps() -> list[dict]:
    conn = db.get_conn()
    rows = conn.execute("SELECT app_id, app_name FROM apps").fetchall()
    conn.close()
    return [{"app_id": row["app_id"], "app_name": row["app_name"]} for row in rows]


def add_app_with_default_channels(app_id: str, app_name: str):
    conn = db.get_conn()
    try:
        conn.execute("INSERT INTO apps(app_id, app_name) VALUES (?, ?)", (app_id, app_name))
        conn.executemany(
            "INSERT INTO channels(app_id,channel_code,display_name,enabled,sort_order) VALUES(?,?,?,?,?)",
            [(app_id, code, name, enabled, order) for code, name, enabled, order in DEFAULT_CHANNELS],
        )
        conn.commit()
    except Exception:
        conn.rollback()
        raise
    finally:
        conn.close()


def app_exists(app_id: str) -> bool:
    conn = db.get_conn()
    row = conn.execute("SELECT 1 FROM apps WHERE app_id=?", (app_id,)).fetchone()
    conn.close()
    return bool(row)


def get_app(app_id: str):
    conn = db.get_conn()
    row = conn.execute("SELECT app_id, app_name FROM apps WHERE app_id=?", (app_id,)).fetchone()
    conn.close()
    return row


def list_channels(app_id: str, include_disabled: bool = True) -> list[dict]:
    conn = db.get_conn()
    sql = (
        "SELECT channel_code,display_name,enabled,sort_order FROM channels WHERE app_id=?"
        + ("" if include_disabled else " AND enabled=1")
        + " ORDER BY sort_order,channel_code"
    )
    rows = conn.execute(sql, (app_id,)).fetchall()
    conn.close()
    return [
        {
            "channel_code": row["channel_code"],
            "display_name": row["display_name"],
            "enabled": bool(row["enabled"]),
            "sort_order": row["sort_order"],
        }
        for row in rows
    ]


def get_channel(app_id: str, channel: str):
    conn = db.get_conn()
    row = conn.execute("SELECT * FROM channels WHERE app_id=? AND channel_code=?", (app_id, channel)).fetchone()
    conn.close()
    return row


def save_channel(app_id: str, code: str, name: str, enabled: bool, sort_order: int):
    conn = db.get_conn()
    try:
        conn.execute(
            """INSERT INTO channels(app_id,channel_code,display_name,enabled,sort_order)
            VALUES(?,?,?,?,?)
            ON CONFLICT(app_id,channel_code) DO UPDATE SET
              display_name=excluded.display_name,
              enabled=excluded.enabled,
              sort_order=excluded.sort_order,
              updated_at=datetime('now')""",
            (app_id, code, name, int(enabled), sort_order),
        )
        conn.commit()
    except Exception:
        conn.rollback()
        raise
    finally:
        conn.close()