import { Injectable, NotFoundException } from '@nestjs/common';
import { Prisma } from '@prisma/client';
import { PrismaService } from '../prisma/prisma.service';

type AuditInput = {
  action: string;
  entityType: string;
  entityId?: string;
  tenantId?: string;
  userId?: string;
  before?: Prisma.InputJsonValue;
  after?: Prisma.InputJsonValue;
  meta?: Prisma.InputJsonValue;
};

@Injectable()
export class AuditService {
  constructor(private readonly prisma: PrismaService) {}

  log(input: AuditInput) {
    return this.prisma.auditLog.create({
      data: {
        action: input.action,
        entityType: input.entityType,
        entityId: input.entityId,
        tenantId: input.tenantId,
        userId: input.userId,
        before: input.before,
        after: input.after,
        meta: input.meta,
      },
    });
  }

  findAll(limit = 50) {
    return this.prisma.auditLog
      .findMany({
        take: Math.min(limit, 200),
        orderBy: { createdAt: 'desc' },
        include: {
          user: {
            select: { id: true, firstName: true, lastName: true, mobile: true },
          },
          tenant: { select: { id: true, slug: true, nameFa: true } },
        },
      })
      .then((rows) =>
        rows.map((row) => ({
          ...row,
          user: row.user
            ? {
                ...row.user,
                name: `${row.user.firstName} ${row.user.lastName}`.trim(),
              }
            : null,
        })),
      );
  }

  async findOne(id: string) {
    const row = await this.prisma.auditLog.findUnique({
      where: { id },
      include: {
        user: {
          select: { id: true, firstName: true, lastName: true, mobile: true },
        },
        tenant: { select: { id: true, slug: true, nameFa: true } },
      },
    });
    if (!row) {
      throw new NotFoundException('لاگ یافت نشد');
    }
    return {
      ...row,
      user: row.user
        ? {
            ...row.user,
            name: `${row.user.firstName} ${row.user.lastName}`.trim(),
          }
        : null,
    };
  }
}