import { getNotebookApiBaseURL } from "@/core/config";
import type { SourceItem, StudioNotebook } from "./types";

function base(): string {
  return getNotebookApiBaseURL();
}

export async function fetchStudioToken(email: string): Promise<string> {
  const apiBase = base();
  if (!apiBase) throw new Error("VITE_AIPI_FRONTEND_URL 未配置");

  const res = await fetch(
    `${apiBase}/api/getTokenByEmail?email=${encodeURIComponent(email)}`,
  );
  if (!res.ok) throw new Error(`获取 Token 失败：${res.status}`);

  const data = (await res.json()) as { token?: string } | string;
  const token = typeof data === "string" ? data : data?.token;
  if (!token) throw new Error("接口未返回有效 token");
  return token;
}

export async function fetchStudioNotebooks(token: string): Promise<StudioNotebook[]> {
  const apiBase = base();
  if (!apiBase) throw new Error("VITE_AIPI_FRONTEND_URL 未配置");

  const res = await fetch(`${apiBase}/api/v1/searchspaces`, {
    headers: { Authorization: `Bearer ${token}` },
  });
  if (!res.ok) throw new Error(`获取笔记本列表失败：${res.status}`);
  return res.json() as Promise<StudioNotebook[]>;
}

export async function createSearchSpace(
  name: string,
  token: string,
): Promise<void> {
  const apiBase = base();
  if (!apiBase) throw new Error("VITE_AIPI_FRONTEND_URL 未配置");

  const res = await fetch(`${apiBase}/api/v1/searchspaces`, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      Authorization: `Bearer ${token}`,
    },
    body: JSON.stringify({ name, description: "", citations_enabled: true }),
  });
  if (!res.ok) {
    const body = await res.json().catch(() => null);
    throw new Error(body?.detail || `创建失败：${res.status}`);
  }
}

export async function uploadSourceText(
  notebookId: number,
  content: string,
  title: string,
  token: string,
): Promise<void> {
  const apiBase = base();
  if (!apiBase) throw new Error("VITE_AIPI_FRONTEND_URL 未配置");
  const res = await fetch(`${apiBase}/api/v1/documents/textupload`, {
    method: "POST",
    headers: { "Content-Type": "application/json", Authorization: `Bearer ${token}` },
    body: JSON.stringify({ search_space_id: notebookId, content, title: title || "粘贴的文字" }),
  });
  if (!res.ok) throw new Error(`上传失败：${res.status}`);
}

export async function deleteSearchSpace(id: number, token: string): Promise<void> {
  const apiBase = base();
  if (!apiBase) throw new Error("VITE_AIPI_FRONTEND_URL 未配置");
  const res = await fetch(`${apiBase}/api/v1/searchspaces/${id}`, {
    method: "DELETE",
    headers: { Authorization: `Bearer ${token}` },
  });
  if (!res.ok) throw new Error(`删除失败：${res.status}`);
}

export async function renameSearchSpace(id: number, name: string, token: string): Promise<void> {
  const apiBase = base();
  if (!apiBase) throw new Error("VITE_AIPI_FRONTEND_URL 未配置");
  const res = await fetch(`${apiBase}/api/v1/searchspaces/${id}`, {
    method: "PATCH",
    headers: { "Content-Type": "application/json", Authorization: `Bearer ${token}` },
    body: JSON.stringify({ name }),
  });
  if (!res.ok) throw new Error(`重命名失败：${res.status}`);
}

export interface ChunkRead {
  id: number;
  content: string;
  document_id: number;
  created_at: string;
}

export interface DocumentWithChunks {
  id: number;
  title: string;
  document_type: string;
  file_type: string;
  chunks: ChunkRead[];
}

export async function fetchDocumentByChunk(
  chunkId: number,
  token: string,
): Promise<DocumentWithChunks> {
  const apiBase = base();
  if (!apiBase) throw new Error("VITE_AIPI_FRONTEND_URL 未配置");

  const res = await fetch(`${apiBase}/api/v1/documents/by-chunk/${chunkId}`, {
    headers: { Authorization: `Bearer ${token}` },
  });
  if (!res.ok) throw new Error(`获取文档失败：${res.status}`);
  return res.json() as Promise<DocumentWithChunks>;
}

export async function uploadSourceFiles(
  notebookId: number,
  files: File[],
  token: string,
): Promise<void> {
  const apiBase = base();
  if (!apiBase) throw new Error("VITE_AIPI_FRONTEND_URL 未配置");

  const formData = new FormData();
  formData.append("search_space_id", String(notebookId));
  for (const file of files) {
    formData.append("files", file);
  }

  const res = await fetch(`${apiBase}/api/v1/documents/fileupload`, {
    method: "POST",
    headers: { Authorization: `Bearer ${token}` },
    body: formData,
  });
  if (!res.ok) throw new Error(`上传失败：${res.status}`);
}

export async function fetchNotebookSources(
  notebookId: number,
  token: string,
): Promise<SourceItem[]> {
  const apiBase = base();
  if (!apiBase) throw new Error("VITE_AIPI_FRONTEND_URL 未配置");

  const res = await fetch(
    `${apiBase}/api/v1/source/search-space/${notebookId}?limit=100`,
    { headers: { Authorization: `Bearer ${token}` } },
  );
  if (!res.ok) throw new Error(`获取来源失败：${res.status}`);
  return res.json() as Promise<SourceItem[]>;
}