"""
Compliance Seeder Service.

Seeds the database with initial regulations, controls, and requirements.
"""

import logging
from typing import Dict

from sqlalchemy.orm import Session

from ..db.models import (
    RegulationDB,
    RequirementDB,
    ControlDB,
    ControlMappingDB,
    RiskDB,
    ServiceModuleDB,
    ModuleRegulationMappingDB,
    StatementOfApplicabilityDB,
    RegulationTypeEnum,
    ControlTypeEnum,
    ControlDomainEnum,
    ControlStatusEnum,
    ServiceTypeEnum,
    RelevanceLevelEnum,
)
from ..data.regulations import REGULATIONS_SEED
from ..data.controls import CONTROLS_SEED
from ..data.requirements import REQUIREMENTS_SEED
from ..data.risks import RISKS_SEED
from ..data.service_modules import BREAKPILOT_SERVICES
from ..data.iso27001_annex_a import ISO27001_ANNEX_A_CONTROLS

logger = logging.getLogger(__name__)


class ComplianceSeeder:
    """Seeds the compliance database with initial data."""

    def __init__(self, db: Session):
        self.db = db
        self._regulation_map: Dict[str, str] = {}  # code -> id
        self._module_map: Dict[str, str] = {}  # name -> id

    def seed_all(self, force: bool = False) -> Dict[str, int]:
        """
        Seed all compliance data.

        Args:
            force: If True, re-seed even if data exists

        Returns:
            Dictionary with counts of seeded items
        """
        results = {
            "regulations": 0,
            "controls": 0,
            "requirements": 0,
            "mappings": 0,
            "risks": 0,
            "service_modules": 0,
            "module_regulation_mappings": 0,
            "soa_entries": 0,
        }

        # Check if already seeded
        existing_regulations = self.db.query(RegulationDB).count()
        if existing_regulations > 0 and not force:
            logger.info(f"Database already has {existing_regulations} regulations, skipping seed")
            return results

        try:
            # Seed in order (regulations first, then controls, then requirements, then risks, then service modules)
            results["regulations"] = self._seed_regulations()
            results["controls"] = self._seed_controls()
            results["requirements"] = self._seed_requirements()
            results["mappings"] = self._seed_default_mappings()
            results["risks"] = self._seed_risks()
            results["service_modules"] = self._seed_service_modules()
            results["module_regulation_mappings"] = self._seed_module_regulation_mappings()
            results["soa_entries"] = self._seed_soa()

            self.db.commit()
            logger.info(f"Seeding completed: {results}")
            return results

        except Exception as e:
            self.db.rollback()
            logger.error(f"Seeding failed: {e}")
            raise

    def _seed_regulations(self) -> int:
        """Seed regulations from REGULATIONS_SEED."""
        count = 0
        for reg_data in REGULATIONS_SEED:
            # Check if regulation already exists
            existing = self.db.query(RegulationDB).filter(
                RegulationDB.code == reg_data["code"]
            ).first()

            if existing:
                self._regulation_map[reg_data["code"]] = existing.id
                continue

            regulation = RegulationDB(
                code=reg_data["code"],
                name=reg_data["name"],
                full_name=reg_data.get("full_name"),
                regulation_type=RegulationTypeEnum(reg_data["regulation_type"]),
                source_url=reg_data.get("source_url"),
                local_pdf_path=reg_data.get("local_pdf_path"),
                effective_date=reg_data.get("effective_date"),
                description=reg_data.get("description"),
                is_active=reg_data.get("is_active", True),
            )
            self.db.add(regulation)
            self.db.flush()  # Get the ID
            self._regulation_map[reg_data["code"]] = regulation.id
            count += 1

        return count

    def _seed_controls(self) -> int:
        """Seed controls from CONTROLS_SEED."""
        count = 0
        for ctrl_data in CONTROLS_SEED:
            # Check if control already exists
            existing = self.db.query(ControlDB).filter(
                ControlDB.control_id == ctrl_data["control_id"]
            ).first()

            if existing:
                continue

            control = ControlDB(
                control_id=ctrl_data["control_id"],
                domain=ControlDomainEnum(ctrl_data["domain"]),
                control_type=ControlTypeEnum(ctrl_data["control_type"]),
                title=ctrl_data["title"],
                description=ctrl_data.get("description"),
                pass_criteria=ctrl_data["pass_criteria"],
                implementation_guidance=ctrl_data.get("implementation_guidance"),
                code_reference=ctrl_data.get("code_reference"),
                is_automated=ctrl_data.get("is_automated", False),
                automation_tool=ctrl_data.get("automation_tool"),
                owner=ctrl_data.get("owner"),
                review_frequency_days=ctrl_data.get("review_frequency_days", 90),
                status=ControlStatusEnum.PLANNED,  # All start as planned
            )
            self.db.add(control)
            count += 1

        return count

    def _seed_requirements(self) -> int:
        """Seed requirements from REQUIREMENTS_SEED."""
        count = 0
        for req_data in REQUIREMENTS_SEED:
            # Get regulation ID
            regulation_code = req_data["regulation_code"]
            regulation_id = self._regulation_map.get(regulation_code)

            if not regulation_id:
                # Try to find in database
                regulation = self.db.query(RegulationDB).filter(
                    RegulationDB.code == regulation_code
                ).first()
                if regulation:
                    regulation_id = regulation.id
                    self._regulation_map[regulation_code] = regulation_id
                else:
                    logger.warning(f"Regulation {regulation_code} not found, skipping requirement")
                    continue

            # Check if requirement already exists
            existing = self.db.query(RequirementDB).filter(
                RequirementDB.regulation_id == regulation_id,
                RequirementDB.article == req_data["article"],
                RequirementDB.paragraph == req_data.get("paragraph"),
            ).first()

            if existing:
                continue

            requirement = RequirementDB(
                regulation_id=regulation_id,
                article=req_data["article"],
                paragraph=req_data.get("paragraph"),
                title=req_data["title"],
                description=req_data.get("description"),
                requirement_text=req_data.get("requirement_text"),
                breakpilot_interpretation=req_data.get("breakpilot_interpretation"),
                is_applicable=req_data.get("is_applicable", True),
                applicability_reason=req_data.get("applicability_reason"),
                priority=req_data.get("priority", 2),
            )
            self.db.add(requirement)
            count += 1

        return count

    def _seed_default_mappings(self) -> int:
        """Create default mappings between requirements and controls."""
        # Define default mappings based on domain/regulation relationships
        mapping_rules = [
            # GDPR Privacy mappings
            ("GDPR", "Art. 5", ["PRIV-001", "PRIV-003", "PRIV-006", "PRIV-007"]),
            ("GDPR", "Art. 25", ["PRIV-003", "PRIV-007"]),
            ("GDPR", "Art. 28", ["PRIV-005"]),
            ("GDPR", "Art. 30", ["PRIV-001"]),
            ("GDPR", "Art. 32", ["CRYPTO-001", "CRYPTO-002", "CRYPTO-003", "IAM-001", "OPS-002"]),
            ("GDPR", "Art. 35", ["PRIV-002", "AI-005"]),
            # AI Act mappings
            ("AIACT", "Art. 9", ["AI-001", "AI-004", "AI-005"]),
            ("AIACT", "Art. 13", ["AI-002", "AI-003"]),
            ("AIACT", "Art. 14", ["AI-003"]),
            ("AIACT", "Art. 15", ["AI-004", "SDLC-001", "SDLC-002"]),
            ("AIACT", "Art. 50", ["AI-002"]),
            # CRA mappings
            ("CRA", "Art. 10", ["SDLC-001", "SDLC-002", "SDLC-006"]),
            ("CRA", "Art. 11", ["GOV-005", "OPS-003"]),
            ("CRA", "Art. 13", ["CRA-001", "SDLC-005"]),
            ("CRA", "Art. 14", ["CRA-003", "OPS-004"]),
            ("CRA", "Art. 15", ["CRA-004"]),
            # BSI-TR mappings
            ("BSI-TR-03161-1", "O.Arch_1", ["GOV-001", "GOV-002", "GOV-004"]),
            ("BSI-TR-03161-1", "O.Auth_1", ["IAM-001", "IAM-002", "IAM-004"]),
            ("BSI-TR-03161-1", "O.Cryp_1", ["CRYPTO-001", "CRYPTO-002", "CRYPTO-003", "CRYPTO-004"]),
            ("BSI-TR-03161-1", "O.Data_1", ["CRYPTO-001", "CRYPTO-002", "PRIV-007"]),
            ("BSI-TR-03161-2", "O.Auth_2", ["IAM-004"]),
            ("BSI-TR-03161-2", "O.Source_1", ["SDLC-001", "SDLC-004"]),
            ("BSI-TR-03161-3", "O.Back_1", ["CRYPTO-002"]),
            ("BSI-TR-03161-3", "O.Ops_1", ["OPS-001", "OPS-002", "OPS-005"]),
        ]

        count = 0
        for reg_code, article_prefix, control_ids in mapping_rules:
            # Find requirements matching this regulation and article
            requirements = self.db.query(RequirementDB).join(RegulationDB).filter(
                RegulationDB.code == reg_code,
                RequirementDB.article.like(f"{article_prefix}%"),
            ).all()

            for req in requirements:
                for control_id in control_ids:
                    # Find control
                    control = self.db.query(ControlDB).filter(
                        ControlDB.control_id == control_id
                    ).first()

                    if not control:
                        continue

                    # Check if mapping exists
                    existing = self.db.query(ControlMappingDB).filter(
                        ControlMappingDB.requirement_id == req.id,
                        ControlMappingDB.control_id == control.id,
                    ).first()

                    if existing:
                        continue

                    mapping = ControlMappingDB(
                        requirement_id=req.id,
                        control_id=control.id,
                        coverage_level="full",
                    )
                    self.db.add(mapping)
                    count += 1

        return count

    def seed_regulations_only(self) -> int:
        """Seed only regulations (useful for incremental updates)."""
        count = self._seed_regulations()
        self.db.commit()
        return count

    def seed_controls_only(self) -> int:
        """Seed only controls (useful for incremental updates)."""
        count = self._seed_controls()
        self.db.commit()
        return count

    def _seed_risks(self) -> int:
        """Seed risks from RISKS_SEED."""
        count = 0
        for risk_data in RISKS_SEED:
            # Check if risk already exists
            existing = self.db.query(RiskDB).filter(
                RiskDB.risk_id == risk_data["risk_id"]
            ).first()

            if existing:
                continue

            # Calculate inherent risk level
            inherent_risk = RiskDB.calculate_risk_level(
                risk_data["likelihood"],
                risk_data["impact"]
            )

            risk = RiskDB(
                risk_id=risk_data["risk_id"],
                title=risk_data["title"],
                description=risk_data.get("description"),
                category=risk_data["category"],
                likelihood=risk_data["likelihood"],
                impact=risk_data["impact"],
                inherent_risk=inherent_risk,
                mitigating_controls=risk_data.get("mitigating_controls", []),
                owner=risk_data.get("owner"),
                treatment_plan=risk_data.get("treatment_plan"),
                status="open",
            )
            self.db.add(risk)
            count += 1

        return count

    def seed_risks_only(self) -> int:
        """Seed only risks (useful for incremental updates)."""
        count = self._seed_risks()
        self.db.commit()
        return count

    def _seed_service_modules(self) -> int:
        """Seed service modules from BREAKPILOT_SERVICES."""
        count = 0
        for service_data in BREAKPILOT_SERVICES:
            # Check if service already exists
            existing = self.db.query(ServiceModuleDB).filter(
                ServiceModuleDB.name == service_data["name"]
            ).first()

            if existing:
                self._module_map[service_data["name"]] = existing.id
                continue

            module = ServiceModuleDB(
                name=service_data["name"],
                display_name=service_data["display_name"],
                description=service_data.get("description"),
                service_type=ServiceTypeEnum(service_data["service_type"]),
                port=service_data.get("port"),
                technology_stack=service_data.get("technology_stack", []),
                repository_path=service_data.get("repository_path"),
                docker_image=service_data.get("docker_image"),
                data_categories=service_data.get("data_categories", []),
                processes_pii=service_data.get("processes_pii", False),
                processes_health_data=service_data.get("processes_health_data", False),
                ai_components=service_data.get("ai_components", False),
                is_active=True,
                criticality=service_data.get("criticality", "medium"),
                owner_team=service_data.get("owner_team"),
            )
            self.db.add(module)
            self.db.flush()  # Get the ID
            self._module_map[service_data["name"]] = module.id
            count += 1

        return count

    def _seed_module_regulation_mappings(self) -> int:
        """Create mappings between service modules and regulations."""
        count = 0
        for service_data in BREAKPILOT_SERVICES:
            # Get module ID
            module_id = self._module_map.get(service_data["name"])
            if not module_id:
                # Try to find in database
                module = self.db.query(ServiceModuleDB).filter(
                    ServiceModuleDB.name == service_data["name"]
                ).first()
                if module:
                    module_id = module.id
                    self._module_map[service_data["name"]] = module_id
                else:
                    logger.warning(f"Module {service_data['name']} not found, skipping regulation mappings")
                    continue

            # Process regulation mappings
            regulations = service_data.get("regulations", [])
            for reg_mapping in regulations:
                # Find regulation by code
                regulation_code = reg_mapping["code"]
                regulation_id = self._regulation_map.get(regulation_code)

                if not regulation_id:
                    regulation = self.db.query(RegulationDB).filter(
                        RegulationDB.code == regulation_code
                    ).first()
                    if regulation:
                        regulation_id = regulation.id
                        self._regulation_map[regulation_code] = regulation_id
                    else:
                        logger.warning(f"Regulation {regulation_code} not found, skipping mapping for {service_data['name']}")
                        continue

                # Check if mapping exists
                existing = self.db.query(ModuleRegulationMappingDB).filter(
                    ModuleRegulationMappingDB.module_id == module_id,
                    ModuleRegulationMappingDB.regulation_id == regulation_id,
                ).first()

                if existing:
                    continue

                mapping = ModuleRegulationMappingDB(
                    module_id=module_id,
                    regulation_id=regulation_id,
                    relevance_level=RelevanceLevelEnum(reg_mapping["relevance"]),
                    notes=reg_mapping.get("notes"),
                )
                self.db.add(mapping)
                count += 1

        return count

    def seed_service_modules_only(self) -> int:
        """Seed only service modules (useful for incremental updates)."""
        results = {
            "service_modules": 0,
            "module_regulation_mappings": 0,
        }

        # Ensure regulations are loaded first
        if not self._regulation_map:
            self._seed_regulations()

        results["service_modules"] = self._seed_service_modules()
        results["module_regulation_mappings"] = self._seed_module_regulation_mappings()

        self.db.commit()
        logger.info(f"Service modules seeding completed: {results}")
        return results["service_modules"] + results["module_regulation_mappings"]

    def _seed_soa(self) -> int:
        """
        Seed Statement of Applicability (SoA) entries from ISO 27001:2022 Annex A.

        Creates SoA entries for all 93 Annex A controls.
        This is MANDATORY for ISO 27001 certification.
        """
        count = 0
        for annex_control in ISO27001_ANNEX_A_CONTROLS:
            control_id = annex_control["control_id"]

            # Check if SoA entry already exists
            existing = self.db.query(StatementOfApplicabilityDB).filter(
                StatementOfApplicabilityDB.annex_a_control == control_id
            ).first()

            if existing:
                continue

            # Create SoA entry
            soa_entry = StatementOfApplicabilityDB(
                annex_a_control=control_id,
                annex_a_title=annex_control["title"],
                annex_a_category=annex_control["category"],
                is_applicable=annex_control.get("default_applicable", True),
                applicability_justification=annex_control.get("description", ""),
                implementation_status="planned",
                implementation_notes=annex_control.get("implementation_guidance", ""),
                breakpilot_control_ids=annex_control.get("breakpilot_controls", []),
                evidence_description="",
                risk_assessment_notes="",
            )
            self.db.add(soa_entry)
            count += 1

        logger.info(f"Seeded {count} SoA entries from ISO 27001:2022 Annex A")
        return count

    def seed_soa_only(self) -> int:
        """
        Seed only SoA entries (useful for incremental updates).

        Creates all 93 ISO 27001:2022 Annex A control entries in the SoA.
        """
        count = self._seed_soa()
        self.db.commit()
        logger.info(f"SoA seeding completed: {count} entries")
        return count