"""Executive Room Service — aggregates real data from 7 sources for the executive dashboard."""

from __future__ import annotations

from typing import Any, Dict
from uuid import UUID

from sqlalchemy import func, select
from sqlalchemy.ext.asyncio import AsyncSession

from app.models.deal import Deal
from app.models.operations import ApprovalRequest, IntegrationSyncState
from app.models.strategic_deal import StrategicDeal
from app.models.evidence_pack import EvidencePack, EvidencePackStatus
from app.services.saudi_compliance_matrix import saudi_compliance_matrix
from app.services.contradiction_engine import contradiction_engine


class ExecutiveRoomService:
    """Aggregates live data from multiple services into one executive snapshot."""

    async def build_snapshot(self, db: AsyncSession, tenant_id: str) -> Dict[str, Any]:
        tid = UUID(tenant_id)
        return {
            "revenue": await self._revenue(db, tid),
            "approvals": await self._approvals(db, tid),
            "connectors": await self._connectors(db, tid),
            "compliance": await self._compliance(db, tenant_id),
            "contradictions": await self._contradictions(db, tenant_id),
            "strategic_deals": await self._strategic_deals(db, tid),
            "evidence_packs": await self._evidence_packs(db, tid),
        }

    # ── Revenue ──────────────────────────────────────────────

    async def _revenue(self, db: AsyncSession, tid: UUID) -> Dict[str, Any]:
        actual = float(
            (await db.execute(
                select(func.coalesce(func.sum(Deal.value), 0))
                .where(Deal.tenant_id == tid, Deal.stage == "closed_won")
            )).scalar() or 0
        )
        pipeline = float(
            (await db.execute(
                select(func.coalesce(func.sum(Deal.value), 0))
                .where(Deal.tenant_id == tid, Deal.stage.in_(["discovery", "proposal", "negotiation"]))
            )).scalar() or 0
        )
        total_closed = int(
            (await db.execute(
                select(func.count()).select_from(Deal)
                .where(Deal.tenant_id == tid, Deal.stage.in_(["closed_won", "closed_lost"]))
            )).scalar() or 0
        )
        won = int(
            (await db.execute(
                select(func.count()).select_from(Deal)
                .where(Deal.tenant_id == tid, Deal.stage == "closed_won")
            )).scalar() or 0
        )
        win_rate = round((won / total_closed * 100), 1) if total_closed else 0.0
        forecast = round(actual * 1.1, 2)
        variance = round(((actual - forecast) / forecast * 100), 1) if forecast else 0.0
        return {
            "actual": actual,
            "forecast": forecast,
            "variance_percent": variance,
            "pipeline_value": pipeline,
            "win_rate": win_rate,
        }

    # ── Approvals with SLA ───────────────────────────────────

    async def _approvals(self, db: AsyncSession, tid: UUID) -> Dict[str, Any]:
        rows = (await db.execute(
            select(ApprovalRequest.payload)
            .where(ApprovalRequest.tenant_id == tid, ApprovalRequest.status == "pending")
        )).scalars().all()
        pending = len(rows)
        warning = breach = 0
        for payload in rows:
            sla = (payload or {}).get("_dealix_sla", {}) if isinstance(payload, dict) else {}
            level = int(sla.get("escalation_level", 0)) if isinstance(sla, dict) else 0
            if level == 1:
                warning += 1
            elif level >= 2:
                breach += 1
        return {"pending": pending, "warning": warning, "breach": breach}

    # ── Connectors ───────────────────────────────────────────

    async def _connectors(self, db: AsyncSession, tid: UUID) -> Dict[str, Any]:
        rows = (await db.execute(
            select(IntegrationSyncState.status, func.count())
            .where(IntegrationSyncState.tenant_id == tid)
            .group_by(IntegrationSyncState.status)
        )).all()
        counts = {"ok": 0, "degraded": 0, "error": 0}
        for status, cnt in rows:
            if status in counts:
                counts[status] = cnt
        return {"healthy": counts["ok"], "degraded": counts["degraded"], "error": counts["error"]}

    # ── Compliance ───────────────────────────────────────────

    async def _compliance(self, db: AsyncSession, tenant_id: str) -> Dict[str, Any]:
        p = await saudi_compliance_matrix.get_posture(db, tenant_id=tenant_id)
        return {
            "compliant": p.get("compliant", 0),
            "partial": p.get("partial", 0),
            "non_compliant": p.get("non_compliant", 0),
            "posture": p.get("posture", "unknown"),
        }

    # ── Contradictions ───────────────────────────────────────

    async def _contradictions(self, db: AsyncSession, tenant_id: str) -> Dict[str, Any]:
        s = await contradiction_engine.get_stats(db, tenant_id=tenant_id)
        return {"active": s.get("active", 0), "critical": s.get("critical_active", 0)}

    # ── Strategic Deals ──────────────────────────────────────

    async def _strategic_deals(self, db: AsyncSession, tid: UUID) -> Dict[str, Any]:
        active = int(
            (await db.execute(
                select(func.count()).select_from(StrategicDeal)
                .where(StrategicDeal.tenant_id == tid, StrategicDeal.status == "active")
            )).scalar() or 0
        )
        value = float(
            (await db.execute(
                select(func.coalesce(func.sum(StrategicDeal.estimated_value_sar), 0))
                .where(StrategicDeal.tenant_id == tid, StrategicDeal.status == "active")
            )).scalar() or 0
        )
        return {"active": active, "pipeline_value": value}

    # ── Evidence Packs ───────────────────────────────────────

    async def _evidence_packs(self, db: AsyncSession, tid: UUID) -> Dict[str, Any]:
        ready = int(
            (await db.execute(
                select(func.count()).select_from(EvidencePack)
                .where(EvidencePack.tenant_id == tid, EvidencePack.status == EvidencePackStatus.READY)
            )).scalar() or 0
        )
        pending = int(
            (await db.execute(
                select(func.count()).select_from(EvidencePack)
                .where(EvidencePack.tenant_id == tid, EvidencePack.status == EvidencePackStatus.ASSEMBLING)
            )).scalar() or 0
        )
        return {"ready": ready, "pending_review": pending}


executive_room_service = ExecutiveRoomService()