import {
  Controller,
  Get,
  Put,
  Param,
  Body,
  UseGuards,
  ForbiddenException,
} from '@nestjs/common';
import { ApiTags, ApiBearerAuth, ApiOperation } from '@nestjs/swagger';
import { TenantGuard } from '../auth/guards/tenant.guard';
import { CurrentUser } from '../common/decorators/current-user.decorator';
import { JwtPayload } from '../common/decorators/current-user.decorator';
import { VisibilityService } from './visibility.service';
import { SetVisibilityDto } from './dto/set-visibility.dto';

const VALID_ENTITIES = ['COMPANY', 'CONTACT', 'DEAL', 'ACTIVITY'];

@ApiTags('Visibility Settings')
@ApiBearerAuth()
@UseGuards(TenantGuard)
@Controller('visibility-settings')
export class VisibilityController {
  constructor(private readonly visibilityService: VisibilityService) {}

  /**
   * Prueft ob der User Tenant-Admin ist (tenantRole oder Platform-Admin).
   */
  private assertTenantAdmin(user: JwtPayload): void {
    const isAdmin =
      user.role === 'PLATFORM_ADMIN' ||
      user.role === 'TENANT_ADMIN' ||
      user.tenantRole === 'ADMIN';
    if (!isAdmin) {
      throw new ForbiddenException(
        'Nur Tenant-Administratoren koennen Sichtbarkeitseinstellungen aendern.',
      );
    }
  }

  @Get()
  @ApiOperation({ summary: 'Alle Sichtbarkeitseinstellungen abrufen' })
  async getAll(@CurrentUser() user: JwtPayload) {
    this.assertTenantAdmin(user);
    const levels = await this.visibilityService.getAllLevels(user.tenantId!);
    return { data: levels };
  }

  @Put(':entity')
  @ApiOperation({ summary: 'Sichtbarkeitslevel fuer eine Entity setzen' })
  async setLevel(
    @CurrentUser() user: JwtPayload,
    @Param('entity') entity: string,
    @Body() dto: SetVisibilityDto,
  ) {
    this.assertTenantAdmin(user);

    const entityUpper = entity.toUpperCase();
    if (!VALID_ENTITIES.includes(entityUpper)) {
      throw new ForbiddenException(
        `Ungueltige Entity: ${entity}. Erlaubt: ${VALID_ENTITIES.join(', ')}`,
      );
    }

    await this.visibilityService.setLevel(user.tenantId!, entityUpper, dto.level);
    return { data: { entity: entityUpper, level: dto.level } };
  }
}