// MSGF Enforcement Service
// Privilege suspension, liquidity tools, SSU recalibration, FX band resets

import prisma from '@/shared/database/prisma';
import { Decimal } from '@prisma/client/runtime/library';
import { v4 as uuidv4 } from 'uuid';


export interface CreateEnforcementRequest {
  policyId: string;
  enforcementType: 'privilege_suspension' | 'liquidity_compression' | 'liquidity_expansion' | 'ssu_recalibration' | 'fx_band_reset';
  targetSovereignBankId?: string;
  enforcementData: Record<string, unknown>;
}

export interface SuspendPrivilegeRequest {
  sovereignBankId: string;
  privilegeType: string;
  suspensionReason: string;
}

export class MsgfEnforcementService {
  /**
   * Create policy enforcement
   */
  async createEnforcement(request: CreateEnforcementRequest) {
    const enforcementId = `ENF-${uuidv4()}`;

    const enforcement = await prisma.policy_enforcements.create({
      data: {
        enforcementId,
        policyId: request.policyId,
        enforcementType: request.enforcementType,
        targetSovereignBankId: request.targetSovereignBankId || null,
        enforcementData: request.enforcementData,
        status: 'pending',
      },
    });

    return enforcement;
  }

  /**
   * Execute enforcement
   */
  async executeEnforcement(enforcementId: string) {
    const enforcement = await prisma.policy_enforcements.findUnique({
      where: { enforcementId },
      include: {
        meta_sovereign_policies: true,
      },
    });

    if (!enforcement) {
      throw new Error(`Enforcement not found: ${enforcementId}`);
    }

    // Execute based on enforcement type
    switch (enforcement.enforcementType) {
      case 'privilege_suspension':
        if (enforcement.targetSovereignBankId) {
          await this.suspendPrivilege({
            sovereignBankId: enforcement.targetSovereignBankId,
            privilegeType: (enforcement.enforcementData as { privilegeType?: string }).privilegeType || 'all',
            suspensionReason: (enforcement.enforcementData as { reason?: string }).reason || 'Policy enforcement',
          });
        }
        break;
      case 'liquidity_compression':
      case 'liquidity_expansion':
        // Would integrate with liquidity pool service
        break;
      case 'ssu_recalibration':
        // Would integrate with SSU service
        break;
      case 'fx_band_reset':
        // Would integrate with FX engine
        break;
    }

    return prisma.policy_enforcements.update({
      where: { enforcementId },
      data: {
        status: 'active',
        executedAt: new Date(),
      },
    });
  }

  /**
   * Suspend sovereign privilege
   */
  async suspendPrivilege(request: SuspendPrivilegeRequest) {
    const privilegeId = `PRIV-${uuidv4()}`;

    // Check if privilege already exists
    const existing = await prisma.sovereign_privileges.findFirst({
      where: {
        sovereignBankId: request.sovereignBankId,
        privilegeType: request.privilegeType,
        status: 'active',
      },
    });

    if (existing) {
      // Update existing privilege
      return prisma.sovereign_privileges.update({
        where: { privilegeId: existing.privilegeId },
        data: {
          status: 'suspended',
          suspensionReason: request.suspensionReason,
          suspendedAt: new Date(),
        },
      });
    } else {
      // Create new privilege record (suspended)
      return prisma.sovereign_privileges.create({
        data: {
          id: uuidv4(),
          privilegeId,
          sovereignBankId: request.sovereignBankId,
          privilegeType: request.privilegeType,
          status: 'suspended',
          suspensionReason: request.suspensionReason,
          suspendedAt: new Date(),
          createdAt: new Date(),
          updatedAt: new Date(),
        },
      });
    }
  }

  /**
   * Restore sovereign privilege
   */
  async restorePrivilege(privilegeId: string) {
    return prisma.sovereign_privileges.update({
      where: { privilegeId },
      data: {
        status: 'active',
        restoredAt: new Date(),
      },
    });
  }

  /**
   * Get enforcements
   */
  async getEnforcements(filters?: {
    policyId?: string;
    enforcementType?: string;
    status?: string;
  }) {
    const where: Record<string, unknown> = {};

    if (filters?.policyId) {
      where.policyId = filters.policyId;
    }
    if (filters?.enforcementType) {
      where.enforcementType = filters.enforcementType;
    }
    if (filters?.status) {
      where.status = filters.status;
    }

    return prisma.policy_enforcements.findMany({
      where,
      include: {
        meta_sovereign_policies: true,
      },
      orderBy: {
        createdAt: 'desc',
      },
    });
  }

  /**
   * Get privileges for a sovereign bank
   */
  async getPrivileges(sovereignBankId: string) {
    return prisma.sovereign_privileges.findMany({
      where: { sovereignBankId },
      orderBy: {
        createdAt: 'desc',
      },
    });
  }
}

export const msgfEnforcementService = new MsgfEnforcementService();

