import { NextRequest, NextResponse } from 'next/server';
import { z } from 'zod';
import { auditAction } from '@/features/foundation/audit-log/service';
import { getEnquiryDetail, reassignEnquiryToUser } from '@/features/crm/enquiries/server/service';
import { PERMISSIONS } from '@/lib/auth/rbac';
import { AuthError, requireOrganizationAccess } from '@/lib/auth/session';
import { enquiryAssignmentRequestSchema } from '../_schemas';

type Params = {
  params: Promise<{ id: string }>;
};

export async function POST(request: NextRequest, { params }: Params) {
  try {
    const { id } = await params;
    const { organization, session, membership } = await requireOrganizationAccess({
      permission: PERMISSIONS.crmEnquiryReassign
    });
    const payload = enquiryAssignmentRequestSchema.parse(await request.json());
    const accessContext = {
      organizationId: organization.id,
      userId: session.user.id,
      membershipRole: membership.role,
      businessRole: membership.businessRole,
      permissions: membership.permissions ?? [],
      branchScopeIds: membership.branchScopeIds ?? [],
      productTypeScopeIds: membership.productTypeScopeIds ?? [],
      ownershipScope: membership.ownershipScope ?? 'organization',
      branchScopeMode: membership.branchScopeMode === 'assigned' ? 'assigned' : 'all',
      productScopeMode: membership.productScopeMode === 'assigned' ? 'assigned' : 'all'
    };
    const before = await getEnquiryDetail(id, organization.id, accessContext);
    const updated = await reassignEnquiryToUser(
      id,
      organization.id,
      session.user.id,
      payload,
      accessContext
    );

    await auditAction({
      organizationId: organization.id,
      branchId: updated.branchId,
      userId: session.user.id,
      entityType: 'crm_enquiry',
      entityId: id,
      action: 'reassign',
      beforeData: {
        oldAssignedToUserId: before.assignedToUserId,
        oldPipelineStage: before.pipelineStage
      },
      afterData: {
        newAssignedToUserId: updated.assignedToUserId,
        newPipelineStage: updated.pipelineStage,
        remark: updated.assignmentRemark
      }
    });

    return NextResponse.json({
      success: true,
      message: 'Enquiry reassigned successfully',
      enquiry: updated
    });
  } catch (error) {
    if (error instanceof AuthError) {
      return NextResponse.json({ message: error.message }, { status: error.status });
    }

    if (error instanceof z.ZodError) {
      return NextResponse.json(
        { message: error.issues[0]?.message ?? 'Invalid payload' },
        { status: 400 }
      );
    }

    if (error instanceof Error) {
      return NextResponse.json({ message: error.message }, { status: 400 });
    }

    return NextResponse.json({ message: 'Unable to reassign enquiry' }, { status: 500 });
  }
}