# agents/specialized/backend_dev.py
import re
import json
from agents.specialized.base import build_result, call_llm
from core.file_builder import build_excel

ROLE = """
Eres programador backend senior. REGLAS ABSOLUTAS:
1. Entrega SOLO el código pedido, sin explicaciones innecesarias.
2. Para excel/planilla → responde con EXCEL_TEMPLATE:{"title":"...","sheet_name":"...","headers":[...],"sample_rows":[[...],[...]]}
3. Python → entrega código Python puro y funcional.
4. Groovy/Jenkins → entrega el script completo.
5. Si hay frontend_dev en el equipo, TÚ haces servidor/backend, él hace HTML.
6. Si la tarea no requiere backend → responde: {"skip":"no backend needed"}
"""


async def run(task: str, context: dict = None) -> dict:
    result = build_result("backend_dev")
    try:
        response = await call_llm("backend_dev", ROLE, task, context)
        result["response"] = response

        # Detectar si el agente generó un EXCEL_TEMPLATE
        match = re.search(r'EXCEL_TEMPLATE:\s*(\{.*\})', response, re.DOTALL | re.IGNORECASE)
        if match:
            try:
                excel_data = json.loads(match.group(1))
                file_path = build_excel(task, excel_data)
                if file_path:
                    result["file_path"] = file_path.name
                    result["file_type"] = "xlsx"
                    result["response"] = response.split("EXCEL_TEMPLATE:")[0].strip()
            except Exception as e:
                result["file_error"] = str(e)

    except Exception as e:
        result["success"] = False
        result["error"] = str(e)

    return result