from pyairtable import Api
from datetime import datetime
import config


class AirtableClient:
    def __init__(self):
        self.api = Api(config.AIRTABLE_TOKEN)
        self.leads = self.api.table(config.AIRTABLE_BASE_ID, config.LEADS_TABLE)
        self.campaigns = self.api.table(config.AIRTABLE_BASE_ID, config.CAMPAIGNS_TABLE)

    def get_active_campaigns(self) -> list[dict]:
        """Lee todas las campañas activas desde 'Google Ads Campaigns'."""
        records = self.campaigns.all(formula="{Status}='Activa'")
        result = []
        for r in records:
            f = r["fields"]
            result.append({
                "airtable_id": r["id"],
                "curso": f.get("Campaign Name", "Sin nombre"),
                "cursoid_text": str(f.get("CursoID Text", "")).strip(),
                "google_campaign_id": str(f.get("CampaignID", "")).strip(),
                "ppl": float(f.get("PPL", 0)),
                "capping_mensual": int(f.get("CapTotalMes", 0)),
                "cpa_maximo": float(f.get("CPAMax", 0)),
                "margen_objetivo": float(f.get("MargenObjetivo", 0)),
            })
        return [c for c in result if c["google_campaign_id"]]  # descartar sin ID

    def sync_campaigns_from_google_ads(self, google_campaigns: list[dict], monthly_metrics: dict = None) -> dict:
        """
        Sincroniza campañas de Google Ads → Airtable.
        - Crea las campañas nuevas con el status real de Google Ads.
        - Actualiza nombre y/o status si han cambiado.
        Devuelve un resumen con listas de campañas creadas y actualizadas.
        """
        STATUS_MAP = {"ENABLED": "Activa", "PAUSED": "Pausada"}

        all_records = self.campaigns.all()
        at_by_gid = {
            str(r["fields"].get("CampaignID", "")).strip(): r
            for r in all_records
            if r["fields"].get("CampaignID")
        }

        created = []   # lista de dicts {name, id, status}
        updated = []   # lista de dicts {name, id, changes}
        to_create = []
        to_update = []  # lista de (record_id, changes, name, gid, at_status)

        for gc in google_campaigns:
            gid = gc["id"]
            at_status = STATUS_MAP.get(gc["status"], "Pausada")
            at_record = at_by_gid.get(gid)

            metrics = (monthly_metrics or {}).get(gid, {})
            conv = round(metrics.get("conversions", 0), 2)
            cost = round(metrics.get("cost", 0), 2)

            if at_record is None:
                fields = {"Campaign Name": gc["name"], "CampaignID": gid, "Status": at_status}
                if monthly_metrics is not None:
                    fields["ConvMes"] = conv
                    fields["CosteMes"] = cost
                to_create.append(fields)
                created.append({"name": gc["name"], "id": gid, "status": at_status})
            else:
                changes = {}
                change_detail = {}
                if at_record["fields"].get("Campaign Name") != gc["name"]:
                    changes["Campaign Name"] = gc["name"]
                    change_detail["nombre"] = {
                        "antes": at_record["fields"].get("Campaign Name"),
                        "ahora": gc["name"],
                    }
                if at_record["fields"].get("Status") != at_status:
                    changes["Status"] = at_status
                    change_detail["status"] = {
                        "antes": at_record["fields"].get("Status"),
                        "ahora": at_status,
                    }
                if monthly_metrics is not None:
                    if at_record["fields"].get("ConvMes") != conv:
                        changes["ConvMes"] = conv
                    if at_record["fields"].get("CosteMes") != cost:
                        changes["CosteMes"] = cost
                if changes:
                    to_update.append((at_record["id"], changes, gc["name"]))
                    if change_detail:
                        updated.append({"name": gc["name"], "id": gid, "changes": change_detail})

        # Crear en lotes de 10
        for i in range(0, len(to_create), 10):
            self.campaigns.batch_create(to_create[i:i+10])

        # Actualizar en lotes de 10
        for i in range(0, len(to_update), 10):
            batch = [{"id": rid, "fields": changes} for rid, changes, _ in to_update[i:i+10]]
            self.campaigns.batch_update(batch)

        return {"created": created, "updated": updated}

    def get_leads_this_month(self, cursoid_text: str) -> int:
        """
        Cuenta todos los leads validados del mes actual para un curso.
        Filtra por attr_cursoid (que coincide con CursoID Text de la campaña).
        """
        now = datetime.now()
        mes_inicio = f"{now.year}-{now.month:02d}-01"

        formula = (
            f"AND("
            f"{{attr_cursoid}}='{cursoid_text}',"
            f"{{creado}}>='{mes_inicio}'"
            f")"
        )
        records = self.leads.all(formula=formula)
        return len(records)