import type {
  EditorBackgroundMusicGenerationInput,
  EditorCharacterAnimationGenerationInput,
  EditorIconSpritesheetGenerationInput,
  EditorImageGenerationInput,
  EditorSoundEffectGenerationInput,
  EditorVideoGenerationInput,
} from '../../services/image-editor/editorProjectClient';
import type {
  CanvasGenerationInputs,
  CanvasLayer,
  CharacterAnimationPanelState,
  GenerateDialogState,
} from './ImageCanvasEditorTypes';
import {
  buildBackgroundMusicGenerationInputs,
  buildCharacterGenerationInputs,
  buildEditGenerationInputs,
  buildIconGenerationInputs,
  buildImageGenerationInputs,
  buildSoundEffectGenerationInputs,
  buildSpecGenerationInputs,
  buildSpecPrompt,
  buildUiDesignGenerationInputs,
  buildVideoGenerationInputs,
  calculateCharacterAnimationPrice,
  calculateEditorVideoPrice,
  CHARACTER_ANIMATION_MODEL,
  DEFAULT_ICON_DESCRIPTIONS,
  DEFAULT_IMAGE_MODEL,
  DEFAULT_SPEC_FORM_VALUES,
  DEFAULT_VIDEO_MODEL,
  EDITOR_GENERATION_MUD_POINT_CONFIG,
  ICON_DESCRIPTION_LIMIT,
  resolveCharacterAnimationSourceImageSrc,
  SEEDANCE_VIDEO_REFERENCE_LIMITS,
  SPEC_GENERATION_ASPECT_RATIO,
  SPEC_GENERATION_IMAGE_SIZE,
  SPEC_GENERATION_MODEL,
  SPEC_GENERATION_SIZE,
  SPEC_TYPE_LABEL,
} from './ImageCanvasGenerationModel';

type ImageGenerationSubmissionOptions = {
  dialog: GenerateDialogState;
  layers: CanvasLayer[];
  nextGeneratedIndex: number;
};

function isSeedanceVideoModel(model: string) {
  return model === 'seedance2.0' || model === 'seedance2.0-fast';
}

function estimateReferenceRequestBytes(references: Array<{ src: string }>) {
  // 中文注释：JSON 包装字段还有少量额外字节；这里按 src 字符串长度估算，前后端都会再兜底校验 64MB。
  return references.reduce((sum, reference) => sum + reference.src.length, 0);
}

function buildSeedanceVideoReferenceInput(
  references: NonNullable<GenerateDialogState['generationReferences']>,
) {
  const resolveReferenceSource = (reference: { src: string; objectKey?: string | null }) =>
    reference.objectKey?.trim() || reference.src;
  const imageReferences = references.filter(
    (reference) => (reference.mediaType ?? 'image') === 'image',
  );
  const videoReferences = references.filter(
    (reference) => reference.mediaType === 'video',
  );
  const audioReferences = references.filter(
    (reference) => reference.mediaType === 'audio',
  );

  if (imageReferences.length > SEEDANCE_VIDEO_REFERENCE_LIMITS.image) {
    throw new Error('参考图片最多 9 张');
  }
  if (videoReferences.length > SEEDANCE_VIDEO_REFERENCE_LIMITS.video) {
    throw new Error('参考视频最多 3 个');
  }
  if (audioReferences.length > SEEDANCE_VIDEO_REFERENCE_LIMITS.audio) {
    throw new Error('参考音频最多 3 个');
  }
  if (audioReferences.length && !imageReferences.length && !videoReferences.length) {
    throw new Error('参考音频必须搭配参考图片或参考视频');
  }
  if (
    estimateReferenceRequestBytes(references) >
    SEEDANCE_VIDEO_REFERENCE_LIMITS.requestBytes
  ) {
    throw new Error('参考文件总请求体不能超过 64MB');
  }

  return {
    referenceImageSrcs: imageReferences.map(resolveReferenceSource),
    referenceVideoSrcs: videoReferences.map(resolveReferenceSource),
    referenceAudioSrcs: audioReferences.map(resolveReferenceSource),
  };
}

function getDialogDefaultPrompt(mode: GenerateDialogState['mode']) {
  if (mode === 'edit') {
    return '修改当前图片';
  }
  if (mode === 'audio-sound-effect') {
    return '游戏音效';
  }
  if (mode === 'audio-background-music') {
    return '游戏背景音乐';
  }
  return 'AI 生成图片';
}

export type ImageGenerationSubmissionPlan =
  | {
      kind: 'edit';
      normalizedPrompt: string;
      sourceLayer: CanvasLayer;
      generationInputs: CanvasGenerationInputs;
    }
  | {
      kind: 'image';
      normalizedPrompt: string;
      input: EditorImageGenerationInput;
      result: {
        assetKind?: CanvasLayer['assetKind'];
        title?: string;
        generationInputs: CanvasGenerationInputs;
      };
      rememberImageModel?: string;
    }
  | {
      kind: 'video';
      normalizedPrompt: string;
      input: EditorVideoGenerationInput;
      result: {
        title: string;
        generationInputs: CanvasGenerationInputs;
      };
    }
  | {
      kind: 'audio';
      audioKind: 'sound-effect';
      normalizedPrompt: string;
      input: EditorSoundEffectGenerationInput;
      result: {
        title: string;
        generationInputs: CanvasGenerationInputs;
      };
    }
  | {
      kind: 'audio';
      audioKind: 'background-music';
      normalizedPrompt: string;
      input: EditorBackgroundMusicGenerationInput;
      result: {
        title: string;
        generationInputs: CanvasGenerationInputs;
      };
    };

export type IconSpritesheetGenerationSubmissionPlan =
  | {
      ok: false;
      errorMessage: string;
    }
  | {
      ok: true;
      iconDescriptions: string[];
      input: EditorIconSpritesheetGenerationInput;
      generationInputs: CanvasGenerationInputs;
      rememberImageModel: string;
    };

export type CharacterAnimationSubmissionPlan = {
  promptText: string;
  input: EditorCharacterAnimationGenerationInput;
};

export function buildImageGenerationSubmissionPlan({
  dialog,
  layers,
  nextGeneratedIndex,
}: ImageGenerationSubmissionOptions): ImageGenerationSubmissionPlan {
  const normalizedPrompt =
    dialog.prompt.trim() || getDialogDefaultPrompt(dialog.mode);

  if (dialog.mode === 'edit') {
    const sourceLayer = layers.find((layer) => layer.id === dialog.sourceLayerId);
    if (!sourceLayer) {
      throw new Error('未找到要修改的图片');
    }
    return {
      kind: 'edit',
      normalizedPrompt,
      sourceLayer,
      generationInputs: buildEditGenerationInputs(
        '修改要求',
        normalizedPrompt,
        sourceLayer,
      ),
    };
  }

  if (dialog.mode === 'spec') {
    const specType = dialog.specType ?? 'custom';
    const specValues = dialog.specValues ?? DEFAULT_SPEC_FORM_VALUES[specType];
    return {
      kind: 'image',
      normalizedPrompt,
      input: {
        prompt: buildSpecPrompt(
          specType,
          specValues,
          Boolean(dialog.specReference?.src),
        ),
        size: SPEC_GENERATION_SIZE,
        model: SPEC_GENERATION_MODEL,
        aspectRatio: SPEC_GENERATION_ASPECT_RATIO,
        imageSize: SPEC_GENERATION_IMAGE_SIZE,
        kind: 'spec',
        ...(dialog.specReference?.src
          ? { referenceImageSrcs: [dialog.specReference.src] }
          : {}),
      },
      result: {
        // 中文注释：生成规范菜单里的“图标规范”沿用历史 ui specType，但产物语义应作为图标规范供图标素材引用。
        assetKind:
          specType === 'ui' || specType === 'icon' ? 'icon-spec' : 'spec',
        title: `${SPEC_TYPE_LABEL[specType]} ${nextGeneratedIndex}`,
        generationInputs: buildSpecGenerationInputs(
          specType,
          specValues,
          dialog.specReference,
        ),
      },
    };
  }

  if (dialog.mode === 'character') {
    const referenceImageSrcs = [
      dialog.characterSpecReference?.src,
      ...(dialog.characterReferences ?? []).map((reference) => reference.src),
    ].filter((src): src is string => Boolean(src));
    const imageModel = dialog.imageModel ?? DEFAULT_IMAGE_MODEL;
    return {
      kind: 'image',
      normalizedPrompt,
      input: {
        prompt: normalizedPrompt,
        kind: 'character',
        model: imageModel,
        aspectRatio: dialog.aspectRatio ?? '1:1',
        imageSize: dialog.imageSize ?? '1K',
        ...(referenceImageSrcs.length ? { referenceImageSrcs } : {}),
      },
      result: {
        assetKind: 'character',
        title: `角色形象 ${nextGeneratedIndex}`,
        generationInputs: buildCharacterGenerationInputs(
          normalizedPrompt,
          dialog.characterSpecReference,
          dialog.characterReferences,
        ),
      },
      rememberImageModel: imageModel,
    };
  }

  if (dialog.mode === 'ui-design') {
    const imageModel = dialog.imageModel ?? DEFAULT_IMAGE_MODEL;
    const referenceImageSrcs = [dialog.uiDesignSpecReference?.src].filter(
      (src): src is string => Boolean(src),
    );
    return {
      kind: 'image',
      normalizedPrompt,
      input: {
        prompt: normalizedPrompt,
        kind: 'ui-design',
        model: imageModel,
        aspectRatio: dialog.aspectRatio ?? '16:9',
        imageSize: dialog.imageSize ?? '1K',
        ...(referenceImageSrcs.length ? { referenceImageSrcs } : {}),
      },
      result: {
        assetKind: 'ui-design',
        title: `UI设计图 ${nextGeneratedIndex}`,
        generationInputs: buildUiDesignGenerationInputs(
          normalizedPrompt,
          dialog.uiDesignSpecReference,
        ),
      },
      rememberImageModel: imageModel,
    };
  }

  if (dialog.mode === 'video') {
    const resolution = dialog.videoResolution ?? '480p';
    const durationSeconds = dialog.videoDurationSeconds ?? 4;
    const model = dialog.videoModel ?? DEFAULT_VIDEO_MODEL;
    const seedanceReferences = isSeedanceVideoModel(model)
      ? buildSeedanceVideoReferenceInput(dialog.generationReferences ?? [])
      : {
          referenceImageSrcs: [],
          referenceVideoSrcs: [],
          referenceAudioSrcs: [],
        };
    return {
      kind: 'video',
      normalizedPrompt,
      input: {
        prompt: normalizedPrompt,
        model,
        aspectRatio: '16:9',
        durationSeconds,
        resolution,
        mode: 'std',
        sound: 'off',
        priceMudPoints: calculateEditorVideoPrice(
          resolution,
          durationSeconds,
        ),
        ...(seedanceReferences.referenceImageSrcs.length
          ? { referenceImageSrcs: seedanceReferences.referenceImageSrcs }
          : {}),
        ...(seedanceReferences.referenceVideoSrcs.length
          ? { referenceVideoSrcs: seedanceReferences.referenceVideoSrcs }
          : {}),
        ...(seedanceReferences.referenceAudioSrcs.length
          ? { referenceAudioSrcs: seedanceReferences.referenceAudioSrcs }
          : {}),
      },
      result: {
        title: `生成视频 ${nextGeneratedIndex}`,
        generationInputs: buildVideoGenerationInputs(
          normalizedPrompt,
          dialog.generationReferences,
        ),
      },
    };
  }

  if (dialog.mode === 'audio-sound-effect') {
    const soundType = dialog.soundType ?? 'one-shot';
    const soundTempo = dialog.soundTempo ?? null;
    return {
      kind: 'audio',
      audioKind: 'sound-effect',
      normalizedPrompt,
      input: {
        sound: normalizedPrompt,
        type: soundType,
        tempo: soundTempo,
        priceMudPoints: EDITOR_GENERATION_MUD_POINT_CONFIG.soundEffect,
      },
      result: {
        title: `游戏音效 ${nextGeneratedIndex}`,
        generationInputs: buildSoundEffectGenerationInputs(
          normalizedPrompt,
          soundType,
          soundTempo,
        ),
      },
    };
  }

  if (dialog.mode === 'audio-background-music') {
    return {
      kind: 'audio',
      audioKind: 'background-music',
      normalizedPrompt,
      input: {
        gptDescriptionPrompt: normalizedPrompt,
        makeInstrumental: true,
        priceMudPoints: EDITOR_GENERATION_MUD_POINT_CONFIG.backgroundMusic,
      },
      result: {
        title: `游戏背景音乐 ${nextGeneratedIndex}`,
        generationInputs: buildBackgroundMusicGenerationInputs(normalizedPrompt),
      },
    };
  }

  const imageModel = dialog.imageModel ?? DEFAULT_IMAGE_MODEL;
  return {
    kind: 'image',
    normalizedPrompt,
    input: {
      prompt: normalizedPrompt,
      model: imageModel,
      aspectRatio: dialog.aspectRatio ?? '1:1',
      imageSize: dialog.imageSize ?? '1K',
      ...(dialog.generationReferences?.length
        ? {
            referenceImageSrcs: dialog.generationReferences.map(
              (reference) => reference.src,
            ),
          }
        : {}),
    },
    result: {
      generationInputs: buildImageGenerationInputs(
        normalizedPrompt,
        dialog.generationReferences,
      ),
    },
    rememberImageModel: imageModel,
  };
}

export function buildIconSpritesheetGenerationSubmissionPlan(
  dialog: GenerateDialogState,
): IconSpritesheetGenerationSubmissionPlan {
  const iconDescriptions = (dialog.prompt.trim()
    ? dialog.prompt.split(/[\r\n,，、;；/|]+/u)
    : (dialog.iconDescriptions ?? DEFAULT_ICON_DESCRIPTIONS)
  )
    .map((description) => description.trim())
    .filter(Boolean)
    .slice(0, ICON_DESCRIPTION_LIMIT);

  if (!dialog.iconSpecReference) {
    return {
      ok: false,
      errorMessage: '请选择图标规范',
    };
  }

  if (!iconDescriptions.length) {
    return {
      ok: false,
      errorMessage: '请填写素材描述',
    };
  }

  const rememberImageModel = dialog.imageModel ?? DEFAULT_IMAGE_MODEL;
  return {
    ok: true,
    iconDescriptions,
    input: {
      referenceImageSrc: dialog.iconSpecReference.src,
      iconDescriptions,
      model: rememberImageModel,
      aspectRatio: dialog.aspectRatio ?? '1:1',
      imageSize: dialog.imageSize ?? '1K',
      priceMudPoints: EDITOR_GENERATION_MUD_POINT_CONFIG.icon,
    },
    generationInputs: buildIconGenerationInputs(
      iconDescriptions,
      dialog.iconSpecReference,
    ),
    rememberImageModel,
  };
}

export function buildCharacterAnimationSubmissionPlan({
  panel,
  sourceLayer,
}: {
  panel: CharacterAnimationPanelState;
  sourceLayer: CanvasLayer;
}): CharacterAnimationSubmissionPlan {
  const promptText = panel.promptText.trim();
  return {
    promptText,
    input: {
      sourceLayerId: sourceLayer.id,
      sourceImageSrc: resolveCharacterAnimationSourceImageSrc(sourceLayer),
      sourceWidth: sourceLayer.originalWidth,
      sourceHeight: sourceLayer.originalHeight,
      promptText,
      resolution: panel.resolution,
      ratio: panel.ratio,
      frameCount: panel.frameCount,
      durationSeconds: panel.durationSeconds,
      priceMudPoints: calculateCharacterAnimationPrice(
        panel.resolution,
        panel.durationSeconds,
      ),
      model: CHARACTER_ANIMATION_MODEL,
    },
  };
}