import { Controller, Get } from "@nestjs/common"
import { ApiOkResponse, ApiOperation, ApiTags } from "@nestjs/swagger"
import {
  CUSTOM_TRANSFORM_CONFIG,
  IMAGE_PRESETS,
  loadAllowedSourceHostsFromEnv,
  parseBooleanFlag,
  type ImagePreset,
} from "@image-platform/image-config"

import { PresetsResponseDto } from "./presets.dto"

@ApiTags("presets")
@Controller("presets")
export class PresetsController {
  @Get()
  @ApiOperation({
    summary: "получить доступные presets и custom config",
    description: "Возвращает статический config presets, custom transform limits и mock allowlist source hosts.",
  })
  @ApiOkResponse({ description: "Конфигурация presets возвращена.", type: PresetsResponseDto })
  getPresets(): PresetsResponseDto {
    return {
      allowedSourceHosts: [...loadAllowedSourceHostsFromEnv()],
      custom: {
        enabled: parseBooleanFlag(process.env.IMAGE_ALLOW_CUSTOM_TRANSFORMS, false),
        formats: CUSTOM_TRANSFORM_CONFIG.formats,
        maxHeight: CUSTOM_TRANSFORM_CONFIG.maxHeight,
        maxWidth: CUSTOM_TRANSFORM_CONFIG.maxWidth,
        quality: CUSTOM_TRANSFORM_CONFIG.quality,
      },
      presets: Object.entries(IMAGE_PRESETS).map(([name, preset]) => {
        const config: ImagePreset = preset

        return {
          formats: config.formats,
          height: config.height,
          mode: config.mode,
          name,
          qualities: config.qualities,
          quality: config.quality,
          resize: config.resize,
          width: config.width,
          widths: config.widths,
        }
      }),
    }
  }
}