import { requestJson } from '../apiClient';

const EDITOR_PROJECT_API_BASE = '/api/editor/projects';
const EDITOR_IMAGE_GENERATION_API = '/api/editor/images/generations';
const EDITOR_IMAGE_EDIT_API = '/api/editor/images/edits';
const DEFAULT_PROJECT_TITLE = '未命名画布';
const EDITOR_PROJECT_REQUEST_OPTIONS = {
  clearAuthOnUnauthorized: false,
  notifyAuthStateChange: false,
};

export type EditorCanvasViewport = {
  x: number;
  y: number;
  scale: number;
};

export type EditorProjectLayerSnapshot = Record<string, unknown> & {
  layerId: string;
  resourceId: string;
};

export type EditorProjectResourceSourceType =
  | 'uploaded'
  | 'generated'
  | 'mock_generated';

export type EditorProjectResourceSnapshot = {
  resourceId: string;
  projectId: string;
  imageSrc: string;
  objectKey?: string | null;
  assetObjectId?: string | null;
  width: number;
  height: number;
  sourceType: EditorProjectResourceSourceType;
  prompt?: string | null;
  actualPrompt?: string | null;
  model?: string | null;
  provider?: string | null;
  taskId?: string | null;
  sourceResourceId?: string | null;
  createdAt?: string;
  updatedAt?: string;
};

export type EditorImageGenerationInput = {
  prompt: string;
};

export type EditorImageEditInput = {
  prompt: string;
  sourceImageSrc: string;
};

export type EditorImageGenerationResult = {
  imageSrc: string;
  width: number;
  height: number;
  sourceType: 'generated';
  prompt: string;
  actualPrompt?: string | null;
  model: string;
  provider: string;
  taskId: string;
};

export type EditorProjectSnapshot = {
  projectId: string;
  title: string;
  canvas?: EditorCanvasSnapshot;
  viewport: EditorCanvasViewport;
  layers: EditorProjectLayerSnapshot[];
  resources: EditorProjectResourceSnapshot[];
  updatedAt: string;
};

export type EditorCanvasSnapshot = {
  canvasId: string;
  projectId: string;
  title: string;
  viewport: EditorCanvasViewport;
  layers: EditorProjectLayerSnapshot[];
  createdAt?: string;
  updatedAt: string;
};

export type EditorProjectCreateInput = {
  title?: string;
};

export type EditorProjectLayoutSaveInput = {
  viewport: EditorCanvasViewport;
  layers: EditorProjectLayerSnapshot[];
};

export type EditorProjectResourceCreateInput = {
  imageSrc: string;
  objectKey?: string | null;
  assetObjectId?: string | null;
  width: number;
  height: number;
  sourceType: EditorProjectResourceSourceType;
  prompt?: string | null;
  actualPrompt?: string | null;
  model?: string | null;
  provider?: string | null;
  taskId?: string | null;
  sourceResourceId?: string | null;
};

type EditorProjectResponse = {
  project: EditorProjectSnapshot;
};

type EditorProjectRecentResponse = {
  project: EditorProjectSnapshot | null;
};

type EditorProjectResourceResponse = {
  resource: EditorProjectResourceSnapshot;
};

type EditorImageGenerationResponse = EditorImageGenerationResult;

function jsonRequest(method: 'POST' | 'PATCH', body: Record<string, unknown>) {
  return {
    method,
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(body),
  };
}

export async function loadRecentEditorProject() {
  return requestJson<EditorProjectRecentResponse>(
    `${EDITOR_PROJECT_API_BASE}/recent`,
    { method: 'GET' },
    '读取图片画布工程失败',
    EDITOR_PROJECT_REQUEST_OPTIONS,
  );
}

export async function createEditorProject(input: EditorProjectCreateInput = {}) {
  const response = await requestJson<EditorProjectResponse>(
    EDITOR_PROJECT_API_BASE,
    jsonRequest('POST', { title: input.title?.trim() || DEFAULT_PROJECT_TITLE }),
    '创建图片画布工程失败',
    EDITOR_PROJECT_REQUEST_OPTIONS,
  );
  return response.project;
}

export async function loadOrCreateRecentEditorProject() {
  const response = await loadRecentEditorProject();
  if (response.project) {
    return response.project;
  }
  return createEditorProject({ title: DEFAULT_PROJECT_TITLE });
}

export async function saveEditorProjectLayout(
  projectId: string,
  input: EditorProjectLayoutSaveInput,
) {
  const response = await requestJson<EditorProjectResponse>(
    `${EDITOR_PROJECT_API_BASE}/${encodeURIComponent(projectId)}`,
    jsonRequest('PATCH', {
      viewport: input.viewport,
      layers: input.layers,
    }),
    '保存图片画布工程失败',
    EDITOR_PROJECT_REQUEST_OPTIONS,
  );
  return response.project;
}

export async function createEditorProjectResource(
  projectId: string,
  input: EditorProjectResourceCreateInput,
) {
  const response = await requestJson<EditorProjectResourceResponse>(
    `${EDITOR_PROJECT_API_BASE}/${encodeURIComponent(projectId)}/resources`,
    jsonRequest('POST', { ...input }),
    '创建图片画布资源失败',
    EDITOR_PROJECT_REQUEST_OPTIONS,
  );
  return response.resource;
}

export async function generateEditorImage(input: EditorImageGenerationInput) {
  return requestJson<EditorImageGenerationResponse>(
    EDITOR_IMAGE_GENERATION_API,
    jsonRequest('POST', { prompt: input.prompt }),
    '生成图片失败',
    {
      ...EDITOR_PROJECT_REQUEST_OPTIONS,
      timeoutMs: 1_200_000,
      retry: {
        maxRetries: 0,
      },
    },
  );
}

export async function editEditorImage(input: EditorImageEditInput) {
  return requestJson<EditorImageGenerationResponse>(
    EDITOR_IMAGE_EDIT_API,
    jsonRequest('POST', {
      prompt: input.prompt,
      sourceImageSrc: input.sourceImageSrc,
    }),
    '修改图片失败',
    {
      ...EDITOR_PROJECT_REQUEST_OPTIONS,
      timeoutMs: 1_200_000,
      retry: {
        maxRetries: 0,
      },
    },
  );
}