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

const POLICY_KEYS = ['privacy', 'terms'] as const;
type PolicyKey = typeof POLICY_KEYS[number];

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

  async getGlobal() {
    const setting = await this.prisma.settings.findUnique({ where: { key: 'global' } });
    return setting?.value;
  }

  async updateGlobal(value: Record<string, any>) {
    return this.prisma.settings.upsert({
      where: { key: 'global' },
      create: { key: 'global', value },
      update: { value },
    });
  }

  async getPolicy(key: string): Promise<string | null> {
    const setting = await this.prisma.settings.findUnique({ where: { key: `policy_${key}` } });
    return (setting?.value as any)?.content ?? null;
  }

  async updatePolicy(key: PolicyKey, content: string) {
    return this.prisma.settings.upsert({
      where: { key: `policy_${key}` },
      create: { key: `policy_${key}`, value: { content } },
      update: { value: { content } },
    });
  }

  async getPolicies() {
    const [privacy, terms] = await Promise.all([
      this.getPolicy('privacy'),
      this.getPolicy('terms'),
    ]);
    return { privacy, terms };
  }

  async getMapsKey(): Promise<string | null> {
    const setting = await this.prisma.settings.findUnique({ where: { key: 'maps_config' } });
    return (setting?.value as any)?.api_key ?? null;
  }

  async saveMapsKey(api_key: string) {
    return this.prisma.settings.upsert({
      where: { key: 'maps_config' },
      create: { key: 'maps_config', value: { api_key } },
      update: { value: { api_key } },
    });
  }
}