"""R9 适配器：市场业务真实性 / 养卡骗补。

源明细：SrcChannelMonthly / SrcSubscription
映射到：Entity(CHANNEL, MSISDN) + 关系(BELONGS_TO_CHANNEL, SUBSCRIBES) + MetricEvent
"""

from __future__ import annotations

import datetime as dt
import uuid

from sqlalchemy.orm import Session

from app.datahub.graph_repo import add_relationship, upsert_entity
from app.datahub.models import MetricEvent
from app.datahub.ontology import EntityType, RelationshipType
from app.datahub.staging import SrcChannelMonthly, SrcSubscription
from app.ingest.base import BaseAdapter, IngestResult
from app.ingest.registry import register_adapter


@register_adapter
class ChannelMonthlyAdapter(BaseAdapter):
    """SrcChannelMonthly → MetricEvent（渠道月度留存/佣金时序）。"""

    source_system = "BSS"
    staging_table = "src_channel_monthly"

    def ingest(
        self,
        session: Session,
        data_version_id: uuid.UUID | None = None,
        batch_size: int = 1000,
    ) -> IngestResult:
        result = IngestResult()
        query = session.query(SrcChannelMonthly)
        if data_version_id:
            query = query.filter(SrcChannelMonthly.data_version_id == data_version_id)
        rows = query.limit(batch_size).all()

        for row in rows:
            try:
                # 确保渠道实体存在
                upsert_entity(
                    session,
                    entity_type=EntityType.CHANNEL,
                    business_key=row.channel_key,
                    data_version_id=data_version_id,
                )

                # cohort_label 如 "2025-01" → 转为时间
                try:
                    event_time = dt.datetime.strptime(
                        row.cohort_label, "%Y-%m"
                    ).replace(tzinfo=dt.timezone.utc)
                except ValueError:
                    event_time = dt.datetime.now(dt.timezone.utc)

                # 留存率事件
                event = MetricEvent(
                    event_time=event_time,
                    subject_type="channel",
                    subject_key=row.channel_key,
                    metric_name="retention",
                    metric_value=row.retained / row.cohort_size if row.cohort_size > 0 else 0.0,
                    attributes={
                        "cohort_label": row.cohort_label,
                        "month_index": row.month_index,
                        "cohort_size": row.cohort_size,
                        "retained": row.retained,
                        "commission_paid": row.commission_paid,
                        "active_ratio": row.active_ratio,
                        "zero_usage_ratio": row.zero_usage_ratio,
                    },
                    data_version_id=data_version_id,
                )
                session.add(event)
                result.metric_events.append(event)
                result.row_count += 1
            except Exception:
                result.error_count += 1

        return result


@register_adapter
class SubscriptionAdapter(BaseAdapter):
    """SrcSubscription → Entity(MSISDN) + 关系(BELONGS_TO_CHANNEL, SUBSCRIBES) + MetricEvent。"""

    source_system = "BSS"
    staging_table = "src_subscription"

    def ingest(
        self,
        session: Session,
        data_version_id: uuid.UUID | None = None,
        batch_size: int = 1000,
    ) -> IngestResult:
        result = IngestResult()
        query = session.query(SrcSubscription)
        if data_version_id:
            query = query.filter(SrcSubscription.data_version_id == data_version_id)
        rows = query.limit(batch_size).all()

        for row in rows:
            try:
                # MSISDN 实体
                msisdn_entity = upsert_entity(
                    session,
                    entity_type=EntityType.MSISDN,
                    business_key=row.msisdn,
                    display_name=row.msisdn,
                    attributes={"region": row.region},
                    data_version_id=data_version_id,
                )
                result.entities.append(msisdn_entity)

                # 渠道归属关系
                if row.channel_key:
                    chan_entity = upsert_entity(
                        session,
                        entity_type=EntityType.CHANNEL,
                        business_key=row.channel_key,
                        data_version_id=data_version_id,
                    )
                    rel = add_relationship(
                        session, RelationshipType.BELONGS_TO_CHANNEL, msisdn_entity, chan_entity,
                        data_version_id=data_version_id,
                    )
                    result.relationships.append(rel)

                # 订购关系（号码→合同/产品）
                if row.product_code:
                    contract_entity = upsert_entity(
                        session,
                        entity_type=EntityType.CONTRACT,
                        business_key=row.product_code,
                        display_name=f"产品-{row.product_code}",
                        data_version_id=data_version_id,
                    )
                    rel = add_relationship(
                        session, RelationshipType.SUBSCRIBES, msisdn_entity, contract_entity,
                        data_version_id=data_version_id,
                    )
                    result.relationships.append(rel)

                # 订购/退订时序事件
                if row.subscribe_time:
                    event = MetricEvent(
                        event_time=row.subscribe_time,
                        subject_type="msisdn",
                        subject_key=row.msisdn,
                        metric_name="subscribe",
                        metric_value=1.0,
                        attributes={
                            "channel_key": row.channel_key,
                            "product_code": row.product_code,
                        },
                        data_version_id=data_version_id,
                    )
                    session.add(event)
                    result.metric_events.append(event)

                if row.unsubscribe_time:
                    event = MetricEvent(
                        event_time=row.unsubscribe_time,
                        subject_type="msisdn",
                        subject_key=row.msisdn,
                        metric_name="unsubscribe",
                        metric_value=-1.0,
                        attributes={
                            "channel_key": row.channel_key,
                            "product_code": row.product_code,
                        },
                        data_version_id=data_version_id,
                    )
                    session.add(event)
                    result.metric_events.append(event)

                result.row_count += 1
            except Exception:
                result.error_count += 1

        return result