"""
Source Policy Router — Manages allowed compliance data sources.

Controls which legal sources the RAG corpus may use, the operations matrix,
PII rules, blocked-content log, audit trail, and dashboard stats/report.

Endpoints:
  GET    /v1/admin/sources                  - List all sources
  POST   /v1/admin/sources                  - Add new source
  GET    /v1/admin/sources/{id}             - Get source by ID
  PUT    /v1/admin/sources/{id}             - Update source
  DELETE /v1/admin/sources/{id}             - Remove source
  GET    /v1/admin/operations-matrix        - Operations matrix
  PUT    /v1/admin/operations/{id}          - Update operation
  GET    /v1/admin/pii-rules                - List PII rules
  POST   /v1/admin/pii-rules                - Create PII rule
  PUT    /v1/admin/pii-rules/{id}           - Update PII rule
  DELETE /v1/admin/pii-rules/{id}           - Delete PII rule
  GET    /v1/admin/blocked-content          - Blocked content log
  GET    /v1/admin/policy-audit             - Audit trail
  GET    /v1/admin/policy-stats             - Dashboard statistics
  GET    /v1/admin/compliance-report        - Compliance report

Phase 1 Step 4 refactor: handlers delegate to SourcePolicyService.
"""

from typing import Any, Optional

from fastapi import APIRouter, Depends, Query
from sqlalchemy.orm import Session

from database import get_db
from compliance.api._http_errors import translate_domain_errors
from compliance.schemas.source_policy import (
    OperationUpdate,
    PIIRuleCreate,
    PIIRuleUpdate,
    SourceCreate,
    SourceResponse,
    SourceUpdate,
)
from compliance.services.source_policy_service import (
    SourcePolicyService,
    _log_audit,  # re-exported for legacy test imports
)

router = APIRouter(prefix="/v1/admin", tags=["source-policy"])


def get_source_policy_service(
    db: Session = Depends(get_db),
) -> SourcePolicyService:
    return SourcePolicyService(db)


# =============================================================================
# Sources CRUD
# =============================================================================

@router.get("/sources")
async def list_sources(
    active_only: bool = Query(False),
    source_type: Optional[str] = Query(None),
    license: Optional[str] = Query(None),
    service: SourcePolicyService = Depends(get_source_policy_service),
) -> dict[str, Any]:
    """List all allowed sources with optional filters."""
    with translate_domain_errors():
        return service.list_sources(active_only, source_type, license)


@router.post("/sources")
async def create_source(
    data: SourceCreate,
    service: SourcePolicyService = Depends(get_source_policy_service),
) -> dict[str, Any]:
    """Add a new allowed source."""
    with translate_domain_errors():
        return service.create_source(data)


@router.get("/sources/{source_id}")
async def get_source(
    source_id: str,
    service: SourcePolicyService = Depends(get_source_policy_service),
) -> dict[str, Any]:
    """Get a specific source."""
    with translate_domain_errors():
        return service.get_source(source_id)


@router.put("/sources/{source_id}")
async def update_source(
    source_id: str,
    data: SourceUpdate,
    service: SourcePolicyService = Depends(get_source_policy_service),
) -> dict[str, Any]:
    """Update an existing source."""
    with translate_domain_errors():
        return service.update_source(source_id, data)


@router.delete("/sources/{source_id}")
async def delete_source(
    source_id: str,
    service: SourcePolicyService = Depends(get_source_policy_service),
) -> dict[str, Any]:
    """Remove an allowed source."""
    with translate_domain_errors():
        return service.delete_source(source_id)


# =============================================================================
# Operations Matrix
# =============================================================================

@router.get("/operations-matrix")
async def get_operations_matrix(
    service: SourcePolicyService = Depends(get_source_policy_service),
) -> dict[str, Any]:
    """Get the full operations matrix."""
    with translate_domain_errors():
        return service.get_operations_matrix()


@router.put("/operations/{operation_id}")
async def update_operation(
    operation_id: str,
    data: OperationUpdate,
    service: SourcePolicyService = Depends(get_source_policy_service),
) -> dict[str, Any]:
    """Update an operation in the matrix."""
    with translate_domain_errors():
        return service.update_operation(operation_id, data)


# =============================================================================
# PII Rules
# =============================================================================

@router.get("/pii-rules")
async def list_pii_rules(
    category: Optional[str] = Query(None),
    service: SourcePolicyService = Depends(get_source_policy_service),
) -> dict[str, Any]:
    """List all PII rules with optional category filter."""
    with translate_domain_errors():
        return service.list_pii_rules(category)


@router.post("/pii-rules")
async def create_pii_rule(
    data: PIIRuleCreate,
    service: SourcePolicyService = Depends(get_source_policy_service),
) -> dict[str, Any]:
    """Create a new PII rule."""
    with translate_domain_errors():
        return service.create_pii_rule(data)


@router.put("/pii-rules/{rule_id}")
async def update_pii_rule(
    rule_id: str,
    data: PIIRuleUpdate,
    service: SourcePolicyService = Depends(get_source_policy_service),
) -> dict[str, Any]:
    """Update a PII rule."""
    with translate_domain_errors():
        return service.update_pii_rule(rule_id, data)


@router.delete("/pii-rules/{rule_id}")
async def delete_pii_rule(
    rule_id: str,
    service: SourcePolicyService = Depends(get_source_policy_service),
) -> dict[str, Any]:
    """Delete a PII rule."""
    with translate_domain_errors():
        return service.delete_pii_rule(rule_id)


# =============================================================================
# Blocked Content
# =============================================================================

@router.get("/blocked-content")
async def list_blocked_content(
    limit: int = Query(50, ge=1, le=500),
    offset: int = Query(0, ge=0),
    domain: Optional[str] = None,
    date_from: Optional[str] = Query(None, alias="from"),
    date_to: Optional[str] = Query(None, alias="to"),
    service: SourcePolicyService = Depends(get_source_policy_service),
) -> dict[str, Any]:
    """List blocked content entries."""
    with translate_domain_errors():
        return service.list_blocked_content(limit, offset, domain, date_from, date_to)


# =============================================================================
# Audit Trail
# =============================================================================

@router.get("/policy-audit")
async def get_policy_audit(
    limit: int = Query(50, ge=1, le=500),
    offset: int = Query(0, ge=0),
    entity_type: Optional[str] = None,
    date_from: Optional[str] = Query(None, alias="from"),
    date_to: Optional[str] = Query(None, alias="to"),
    service: SourcePolicyService = Depends(get_source_policy_service),
) -> dict[str, Any]:
    """Get the audit trail for source policy changes."""
    with translate_domain_errors():
        return service.get_audit(limit, offset, entity_type, date_from, date_to)


# =============================================================================
# Dashboard Statistics + Report
# =============================================================================

@router.get("/policy-stats")
async def get_policy_stats(
    service: SourcePolicyService = Depends(get_source_policy_service),
) -> dict[str, Any]:
    """Get dashboard statistics for source policy."""
    with translate_domain_errors():
        return service.stats()


@router.get("/compliance-report")
async def get_compliance_report(
    service: SourcePolicyService = Depends(get_source_policy_service),
) -> dict[str, Any]:
    """Generate a compliance report for source policies."""
    with translate_domain_errors():
        return service.compliance_report()


# ----------------------------------------------------------------------------
# Legacy re-exports for tests that import schemas/helpers directly.
# ----------------------------------------------------------------------------

__all__ = [
    "router",
    "SourceCreate",
    "SourceUpdate",
    "SourceResponse",
    "OperationUpdate",
    "PIIRuleCreate",
    "PIIRuleUpdate",
    "_log_audit",
]