"""
block_model.py — Accès aux données pour l'entité "block" (widgets du dashboard).

Module historique de GestHub, migré de Flask-SQLAlchemy vers PyMySQL pour
rester cohérent avec le reste de la couche models/ (accès direct, sans ORM,
requêtes paramétrées).
"""

import json


def _row_to_dict(row):
    if row is None:
        return None
    return {
        "id": row["id"],
        "type": row["block_type"],
        "column": row["column_name"],
        "position": row["position"],
        "data": json.loads(row["data"]) if row["data"] else {},
    }


def fetch_all(db):
    query = (
        "SELECT id, block_type, column_name, position, data FROM blocks "
        "ORDER BY column_name, position"
    )
    rows = db.fetch_all(query)
    return [_row_to_dict(r) for r in rows]


def insert(db, block_type, column_name, data, position=99):
    query = (
        "INSERT INTO blocks (block_type, column_name, position, data) "
        "VALUES (%s, %s, %s, %s)"
    )
    new_id = db.execute(query, (block_type, column_name, position, json.dumps(data)))
    return _row_to_dict({
        "id": new_id,
        "block_type": block_type,
        "column_name": column_name,
        "position": position,
        "data": json.dumps(data),
    })


def update_position(db, block_id, column_name, position):
    query = "UPDATE blocks SET column_name = %s, position = %s WHERE id = %s"
    with db.cursor(commit=True) as cur:
        cur.execute(query, (column_name, position, block_id))
        return cur.rowcount


def delete(db, block_id):
    query = "DELETE FROM blocks WHERE id = %s"
    with db.cursor(commit=True) as cur:
        cur.execute(query, (block_id,))
        return cur.rowcount