export const SNAPGEN_IMAGE_BASE_URL = "https://api.snapgen.ai";

export const SNAPGEN_NANO_BANANA_PRO_MODEL_ID = "snapgen/nano-banana-pro";
export const SNAPGEN_NANO_BANANA_2_MODEL_ID = "snapgen/nano-banana-2";
export const SNAPGEN_GROK_IMAGE_MODEL_ID = "snapgen/grok-image";
export const SNAPGEN_META_AI_IMAGE_MODEL_ID = "snapgen/meta-ai-image";
export const SNAPGEN_GPT_IMAGE_2_MODEL_ID = "snapgen/gpt-image-2";

export interface SnapgenImageModelPreset {
  modelId: string;
  displayName: string;
  description: string;
  supportsVision: boolean;
  supportsImageGen: boolean;
  capabilities?: Record<string, any>;
  defaultParams?: Record<string, any>;
  imageGenConfig?: Record<string, any>;
  sortOrder: number;
}

const SNAPGEN_COMMON_IMAGE_CONFIG = {
  supportsSize: true,
  supports1K: true,
  supports2K: true,
  supports4K: true,
  supportsPromptExtend: false,
  supportsNegativePrompt: false,
  supportsWatermark: false,
  supportsSeed: false,
  creditCostPerImage: 0,
  enableLoadingPlaceholder: true,
  loadingColor: "blue",
};

export const SNAPGEN_STANDARD_REQUEST_ASPECT_RATIOS = ["1:1", "16:9", "9:16", "4:3", "3:4"];
export const SNAPGEN_GPT_IMAGE_2_REQUEST_ASPECT_RATIOS = [
  "1:1",
  "16:9",
  "9:16",
  "4:3",
  "3:4",
  "21:9",
  "3:2",
  "2:3",
];
const SNAPGEN_STANDARD_ASPECT_RATIOS = ["auto", ...SNAPGEN_STANDARD_REQUEST_ASPECT_RATIOS];
const SNAPGEN_GPT_IMAGE_2_ASPECT_RATIOS = [
  "auto",
  ...SNAPGEN_GPT_IMAGE_2_REQUEST_ASPECT_RATIOS,
];

export const SNAPGEN_IMAGE_MODEL_PRESETS: SnapgenImageModelPreset[] = [
  {
    modelId: SNAPGEN_NANO_BANANA_PRO_MODEL_ID,
    displayName: "SnapGen Nano Banana Pro",
    description:
      "SnapGen Gemini 3 Pro Image Preview 生图模型，面向高保真、文字渲染和复杂提示词场景。",
    supportsVision: true,
    supportsImageGen: true,
    capabilities: {
      provider: "snapgen",
      kind: "image-generation",
      endpoint: "nano-banana-pro",
      apiFormat: "snapgen-generic-image",
      officialUrl: "https://docs.snapgen.ai/resources/0.image-generation",
      requiredFields: ["prompt", "model"],
      optionalFields: ["aspect_ratio", "resolution", "style", "file_urls", "output_format"],
      supportsMultiImageReference: true,
      maxReferenceImages: 8,
    },
    defaultParams: {
      provider: "snapgen",
      endpoint: "nano-banana-pro",
      apiFormat: "snapgen-generic-image",
      imageSize: "2K",
      aspectRatio: "1:1",
      outputFormat: "png",
    },
    imageGenConfig: {
      ...SNAPGEN_COMMON_IMAGE_CONFIG,
      maxImages: 1,
      supportedAspectRatios: SNAPGEN_STANDARD_ASPECT_RATIOS,
      supportedImageSizes: ["1K", "2K", "4K"],
    },
    sortOrder: 10,
  },
  {
    modelId: SNAPGEN_NANO_BANANA_2_MODEL_ID,
    displayName: "SnapGen Nano Banana 2",
    description:
      "SnapGen Gemini 3 Flash Image Preview 生图模型，适合快速生成和高频图片任务。",
    supportsVision: true,
    supportsImageGen: true,
    capabilities: {
      provider: "snapgen",
      kind: "image-generation",
      endpoint: "nano-banana-2",
      apiFormat: "snapgen-generic-image",
      officialUrl: "https://docs.snapgen.ai/resources/0.image-generation",
      requiredFields: ["prompt", "model"],
      optionalFields: ["aspect_ratio", "resolution", "style", "file_urls", "output_format"],
      supportsMultiImageReference: true,
      maxReferenceImages: 8,
    },
    defaultParams: {
      provider: "snapgen",
      endpoint: "nano-banana-2",
      apiFormat: "snapgen-generic-image",
      imageSize: "1K",
      aspectRatio: "1:1",
      outputFormat: "png",
    },
    imageGenConfig: {
      ...SNAPGEN_COMMON_IMAGE_CONFIG,
      maxImages: 1,
      supportedAspectRatios: SNAPGEN_STANDARD_ASPECT_RATIOS,
      supportedImageSizes: ["1K", "2K", "4K"],
    },
    sortOrder: 20,
  },
  {
    modelId: SNAPGEN_GROK_IMAGE_MODEL_ID,
    displayName: "SnapGen Grok Image",
    description:
      "SnapGen Grok Image 生成接口，支持 SPEED / QUALITY 模式、横竖方图和最多 8 张输出。",
    supportsVision: true,
    supportsImageGen: true,
    capabilities: {
      provider: "snapgen",
      kind: "image-generation",
      endpoint: "/uapi/v1/imagen/grok",
      apiFormat: "snapgen-grok-image",
      officialUrl: "https://docs.snapgen.ai/resources/1.grok_image",
      requiredFields: ["prompt"],
      optionalFields: ["orientation", "num_result", "mode", "ref_history", "files"],
      supportsMultiImageReference: true,
      maxReferenceImages: 8,
    },
    defaultParams: {
      provider: "snapgen",
      endpoint: "/uapi/v1/imagen/grok",
      apiFormat: "snapgen-grok-image",
      imageSize: "1K",
      aspectRatio: "1:1",
      mode: "SPEED",
    },
    imageGenConfig: {
      ...SNAPGEN_COMMON_IMAGE_CONFIG,
      supportsSize: false,
      maxImages: 8,
      supportedAspectRatios: SNAPGEN_STANDARD_ASPECT_RATIOS,
      supportedQualities: ["SPEED", "QUALITY"],
    },
    sortOrder: 30,
  },
  {
    modelId: SNAPGEN_META_AI_IMAGE_MODEL_ID,
    displayName: "SnapGen Meta AI Image",
    description:
      "SnapGen Meta AI 图片生成接口，支持横图、竖图、方图和最多 4 张输出。",
    supportsVision: true,
    supportsImageGen: true,
    capabilities: {
      provider: "snapgen",
      kind: "image-generation",
      endpoint: "/uapi/v1/meta_ai/generate",
      apiFormat: "snapgen-meta-ai-image",
      officialUrl: "https://docs.snapgen.ai/resources/2.image_meta-ai",
      requiredFields: ["prompt"],
      optionalFields: ["orientation", "num_result", "ref_history", "files"],
      supportsMultiImageReference: true,
      maxReferenceImages: 8,
    },
    defaultParams: {
      provider: "snapgen",
      endpoint: "/uapi/v1/meta_ai/generate",
      apiFormat: "snapgen-meta-ai-image",
      imageSize: "1K",
      aspectRatio: "1:1",
    },
    imageGenConfig: {
      ...SNAPGEN_COMMON_IMAGE_CONFIG,
      supportsSize: false,
      maxImages: 4,
      supportedAspectRatios: SNAPGEN_STANDARD_ASPECT_RATIOS,
    },
    sortOrder: 40,
  },
  {
    modelId: SNAPGEN_GPT_IMAGE_2_MODEL_ID,
    displayName: "SnapGen GPT Image 2",
    description:
      "SnapGen GPT Image 2 高质量图片生成接口，支持多种比例、1K-12K 分辨率和低/中/高质量模式。",
    supportsVision: true,
    supportsImageGen: true,
    capabilities: {
      provider: "snapgen",
      kind: "image-generation",
      endpoint: "/uapi/v1/imagen/gpt-image-2",
      apiFormat: "snapgen-gpt-image-2",
      officialUrl: "https://docs.snapgen.ai/resources/3.gpt-image-2",
      requiredFields: ["prompt"],
      optionalFields: ["aspect_ratio", "resolution", "mode", "ref_history", "files"],
      supportsMultiImageReference: true,
      maxReferenceImages: 8,
    },
    defaultParams: {
      provider: "snapgen",
      endpoint: "/uapi/v1/imagen/gpt-image-2",
      apiFormat: "snapgen-gpt-image-2",
      imageSize: "2K",
      aspectRatio: "1:1",
      mode: "low",
    },
    imageGenConfig: {
      ...SNAPGEN_COMMON_IMAGE_CONFIG,
      maxImages: 1,
      supportedAspectRatios: SNAPGEN_GPT_IMAGE_2_ASPECT_RATIOS,
      supportedImageSizes: ["1K", "2K", "4K", "8K", "10K", "12K"],
      supportedQualities: ["low", "medium", "high"],
    },
    sortOrder: 50,
  },
];

export function getSnapgenImageModelPresetById(modelId: string) {
  return SNAPGEN_IMAGE_MODEL_PRESETS.find(
    (preset) => preset.modelId === String(modelId || "").trim()
  );
}

export function resolveSnapgenImageRuntimeModelId(modelId: string) {
  const preset = getSnapgenImageModelPresetById(modelId);
  const endpoint = preset?.defaultParams?.endpoint;

  if (typeof endpoint === "string" && endpoint.trim()) {
    return endpoint.trim();
  }

  return modelId;
}