import { postgrestGet, type PostgrestParams } from '../postgrest-client';
import dayjs from 'dayjs';
import { UPLOAD_URL, API_BASE_URL } from '../../config/api-config';
import axios from 'axios';
import { CONTRACT_TYPES, DEFAULT_CONTRACT_TYPE, type ContractType } from '~/constants/contractTypes';

/**
 * 检查文档名称是否重复
 * @param name 文档名称
 * @param typeId 文档类型ID
 * @returns 重复检查结果
 */
export async function checkDocumentDuplicate(
  name: string,
  typeId: number
): Promise<{ is_duplicate: boolean; count: number }> {
  try {
    // 获取 token
    let token: string | null = null;
    if (typeof window !== 'undefined') {
      token = localStorage.getItem('access_token');
    }

    const headers: Record<string, string> = {
      'Accept': 'application/json'
    };
    if (token) {
      headers['Authorization'] = `Bearer ${token}`;
    }

    const response = await axios.get(
      `${API_BASE_URL}/api/v2/documents/check-duplicate`,
      {
        params: { name, type_id: typeId },
        headers
      }
    );

    // 解析响应数据
    const data = response.data;
    if (data && typeof data === 'object') {
      // 处理标准响应格式 { code, msg, data }
      if ('data' in data && data.data) {
        return {
          is_duplicate: data.data.is_duplicate ?? false,
          count: data.data.count ?? 0
        };
      }
      // 直接返回数据格式
      return {
        is_duplicate: data.is_duplicate ?? false,
        count: data.count ?? 0
      };
    }

    return { is_duplicate: false, count: 0 };
  } catch (error) {
    console.error('【文档重名检查】检查失败:', error);
    // 检查失败时默认允许上传
    return { is_duplicate: false, count: 0 };
  }
}
// import { API_BASE_URL } from '../client';

/**
 * 从不同格式的 API 响应中提取数据
 * @param responseData API 响应数据
 * @returns 提取后的数据或 null
 */
function extractApiData<T>(responseData: unknown): T | null {
    if (!responseData) return null;

    // 格式1: { code: number, msg: string, data: T }
    if (typeof responseData === 'object' && responseData !== null &&
        'code' in responseData &&
        'data' in responseData &&
        (responseData as { data: unknown }).data) {
        return (responseData as { data: T }).data;
    }

    // 格式2: 直接是数据对象
    return responseData as T;
}

/**
 * 从 sessionStorage 获取文档类型 ID 列表（客户端专用）
 * @returns 文档类型 ID 数组，如果不存在则返回 null
 */
function getDocumentTypeIdsFromSession(): number[] | null {
    if (typeof window === 'undefined') {
        return null; // 服务端环境返回 null
    }

    try {
        const typeIdsStr = sessionStorage.getItem('documentTypeIds');
        if (!typeIdsStr) {
            return null;
        }

        const typeIds = JSON.parse(typeIdsStr);
        if (Array.isArray(typeIds) && typeIds.every(id => typeof id === 'number')) {
            return typeIds;
        }

        console.warn('⚠️ [getDocumentTypeIds] documentTypeIds 格式不正确:', typeIds);
        return null;
    } catch (error) {
        console.error('❌ [getDocumentTypeIds] 解析 documentTypeIds 失败:', error);
        return null;
    }
}

function getSelectedModuleIdFromSession(): number | null {
    if (typeof window === 'undefined') {
        return null;
    }

    try {
        const moduleId = sessionStorage.getItem('selectedModuleId');
        if (!moduleId) {
            return null;
        }

        const parsed = Number(moduleId);
        return Number.isFinite(parsed) && parsed > 0 ? parsed : null;
    } catch (error) {
        console.error('❌ [getSelectedModuleId] 解析 selectedModuleId 失败:', error);
        return null;
    }
}

// 文档状态枚举
export enum DocumentStatus {
  waiting = 'waiting',
  WAITING = "Waiting",
  QUEUED = "Queued",           // 排队中
  CUTTING = "Cutting",
  EXTRACTIONING = "Extractioning",
  EVALUATIONING = "Evaluationing",
  FAILED = "Failed",
  PROCESSED = "Processed"
}

// 文档类型接口
export interface DocumentType {
  id: number;
  name: string;
  code?: string;
  entryModuleId?: number;
  entryModuleName?: string | null;
  isEnabled?: boolean;
  ruleSetIds?: number[];
  childDocumentTypeIds?: number[];
}

export interface DocumentSubtypeGroup {
  id: number;
  name: string;
  code: string;
  documentTypeId: number;
  documentTypeName?: string | null;
  rootGroupId?: number | null;
  rootGroupName?: string | null;
  entryModuleName?: string | null;
  entryModuleId?: number | null;
  isDefault?: boolean;
  displayName?: string;
  displayHint?: string;
}

export interface UploadErrorDetails {
  title: string;
  summary: string;
  detailLines: string[];
  actionLines: string[];
  rawMessage: string;
  category: 'rule_binding' | 'rule_version' | 'entry_module' | 'permission' | 'file' | 'unknown';
}

// 提取结果接口
interface ExtractedResult {
  [key: string]: unknown;
}

// 摘要接口
interface Summary {
  [key: string]: unknown;
}

// 文档接口
export interface Document {
  id: number;
  name: string;
  type_id: number;
  file_size: number;
  status: DocumentStatus;
  created_at: string;
  document_number?: string;
  path?: string;
  storage_type?: string;
  is_test_document?: boolean;
  evaluation_level?: string;
  ocr_result?: Record<string, string>;
  extracted_results?: ExtractedResult;
  sumary?: Summary;
  remark?: string;
  audit_status?: number;
}

// 合同结构比较表接口
export interface ContractStructureComparison {
  id: number;
  template_contract_name: string;
  file_size: number;
  status: DocumentStatus;
  created_at: string;
  document_id?: number;
  template_contract_path?: string;
  ocr_results?: Record<string, unknown>;
  comparison_results?: Record<string, unknown>;
}

// 文件上传响应接口（兼容旧前端）
export interface UploadResult {
  success: boolean;
  documentId: number;
  fileId: number;
  fileName: string;
  fileSize: number;
  typeId: number;
  groupId?: number | null;
  region: string;
  processingStatus: string;
  duplicateUpload: boolean;
  error?: string;
}

export interface UploadProgressInfo {
  loaded: number;
  total: number;
  percent: number;
}

// 旧接口上传响应（uploadContractTemplate / appendContractAttachments 仍在使用）
interface LegacyUploadResponse {
  success: boolean;
  result?: { id: number; file_name: string; file_size: number; [key: string]: unknown };
  error: string | null;
}

// 新后端上传响应
interface NewUploadResponse {
  documentId: number;
  internalDocumentNo: number;
  versionGroupKey: string;
  versionNo: number;
  previousVersionId: number | null;
  rootVersionId: number;
  duplicateUpload: boolean;
  fileId: number;
  typeId: number;
  typeCode: string;
  groupId?: number | null;
  region: string;
  fileName: string;
  ossUrl: string;
  speed: string;
  processingStatus: string;
  autoRunTriggered: boolean;
}

type UploadErrorPayload = Record<string, unknown> | null | undefined;

function readPayloadValue(payload: UploadErrorPayload, keys: string[]): unknown {
  if (!payload || typeof payload !== 'object') {
    return undefined;
  }

  for (const key of keys) {
    if (key in payload && payload[key] !== undefined && payload[key] !== null && payload[key] !== '') {
      return payload[key];
    }
  }

  const nestedData = payload.data;
  if (nestedData && typeof nestedData === 'object') {
    const nestedRecord = nestedData as Record<string, unknown>;
    for (const key of keys) {
      if (key in nestedRecord && nestedRecord[key] !== undefined && nestedRecord[key] !== null && nestedRecord[key] !== '') {
        return nestedRecord[key];
      }
    }
  }

  return undefined;
}

function stringifyIdList(values?: number[]): string | null {
  if (!values || values.length === 0) {
    return null;
  }

  return values.join('、');
}

export function buildUploadErrorDetails(
  rawMessage: string,
  options?: {
    documentType?: DocumentType | null;
    status?: number;
    payload?: UploadErrorPayload;
  }
): UploadErrorDetails {
  const documentType = options?.documentType ?? null;
  const status = options?.status;
  const payload = options?.payload;
  const message = (rawMessage || '上传失败').trim();
  const normalizedMessage = message.toLowerCase();

  const payloadRuleSetName = readPayloadValue(payload, ['ruleSetName', 'ruleName', 'ruleSet', 'rule_type']);
  const payloadRuleSetId = readPayloadValue(payload, ['ruleSetId', 'rule_set_id']);
  const payloadEntryModuleName = readPayloadValue(payload, ['entryModuleName', 'moduleName', 'entryModule']);
  const payloadEntryModuleId = readPayloadValue(payload, ['entryModuleId', 'entry_module_id']);

  const ruleSetDisplayName = payloadRuleSetName
    ? String(payloadRuleSetName)
    : documentType?.ruleSetIds?.length === 1
      ? `规则集 ID ${documentType.ruleSetIds[0]}`
      : null;
  const entryModuleDisplayName = payloadEntryModuleName
    ? String(payloadEntryModuleName)
    : payloadEntryModuleId
      ? `入口模块 ID ${payloadEntryModuleId}`
      : documentType?.entryModuleId
        ? `入口模块 ID ${documentType.entryModuleId}`
        : null;
  const documentTypeDisplayName = documentType
    ? `${documentType.name}${documentType.code ? `（${documentType.code}）` : ''}`
    : '当前文档类型';

  if (status === 401 || normalizedMessage.includes('unauthorized') || message.includes('未登录') || message.includes('token')) {
    return {
      title: '登录状态已失效',
      summary: '当前登录状态已失效，系统无法继续上传文件。',
      detailLines: [
        '请先重新登录，再重新选择文件上传。',
        `后端返回：${message}`,
      ],
      actionLines: ['刷新页面并重新登录后重试。'],
      rawMessage: message,
      category: 'permission',
    };
  }

  if (status === 403 || message.includes('无权限') || message.includes('权限') || normalizedMessage.includes('forbidden')) {
    return {
      title: '当前账号没有上传权限',
      summary: '当前账号没有执行该上传操作的权限，文件尚未进入审核流程。',
      detailLines: [
        `文档类型：${documentTypeDisplayName}`,
        `后端返回：${message}`,
      ],
      actionLines: ['请联系管理员检查当前账号的上传权限或入口模块授权。'],
      rawMessage: message,
      category: 'permission',
    };
  }

  if (
    message.includes('未绑定可用规则版本') ||
    message.includes('未绑定规则版本') ||
    message.includes('没有可用规则版本') ||
    message.includes('未找到可用规则版本')
  ) {
    const detailLines = [
      `文档类型：${documentTypeDisplayName}`,
      documentType?.ruleSetIds?.length
        ? `已绑定规则集：${stringifyIdList(documentType.ruleSetIds)}`
        : '当前文档类型还没有绑定任何规则集。',
      entryModuleDisplayName
        ? `归属入口：${entryModuleDisplayName}`
        : '当前文档类型还没有配置入口模块，上传入口配置也需要一起检查。',
    ];

    if (ruleSetDisplayName || payloadRuleSetId) {
      detailLines.push(`疑似异常规则集：${ruleSetDisplayName || `规则集 ID ${payloadRuleSetId}`}`);
    } else if (documentType?.ruleSetIds && documentType.ruleSetIds.length > 1) {
      detailLines.push('该文档类型绑定了多个规则集，需要逐个确认可用规则数是否正常。');
    } else {
      detailLines.push('后端没有返回具体规则集名称，建议优先检查该文档类型绑定的规则集是否存在可用规则。');
    }

    detailLines.push(`后端返回：${message}`);

    return {
      title: '审核规则未配置完整',
      summary: `${documentTypeDisplayName} 目前没有可用的审核规则，所以系统无法接收本次上传。`,
      detailLines,
      actionLines: [
        '到“系统设置 / 文档类型管理”检查该文档类型是否绑定了正确的规则集。',
        '到“规则管理”确认对应规则集的可用规则数是否正常。',
        '如果首页入口也异常，请同时到“系统设置 / 入口模块管理”检查入口模块绑定。',
      ],
      rawMessage: message,
      category: 'rule_binding',
    };
  }

  if (message.includes('规则集不存在') || message.includes('规则版本不存在') || message.includes('未发布')) {
    const detailLines = [
      `文档类型：${documentTypeDisplayName}`,
      ruleSetDisplayName
        ? `相关规则集：${ruleSetDisplayName}`
        : '后端未返回明确的规则集名称。',
      `后端返回：${message}`,
    ];

    return {
      title: '规则集不可用',
      summary: '当前上传入口关联的规则集不可用，文件无法开始审核。',
      detailLines,
      actionLines: [
        '到“规则管理”检查对应规则集是否存在、可用规则数是否正常。',
        '如文档类型绑定了错误的规则集，请到“系统设置 / 文档类型管理”修正绑定关系。',
      ],
      rawMessage: message,
      category: 'rule_version',
    };
  }

  if (message.includes('入口模块')) {
    return {
      title: '入口模块配置异常',
      summary: '当前文档类型关联的入口模块配置异常，导致上传链路无法正常工作。',
      detailLines: [
        `文档类型：${documentTypeDisplayName}`,
        entryModuleDisplayName
          ? `相关入口模块：${entryModuleDisplayName}`
          : '后端未返回明确的入口模块名称或编号。',
        `后端返回：${message}`,
      ],
      actionLines: [
        '到“系统设置 / 入口模块管理”检查目标入口模块是否存在、是否启用、跳转路径是否正确。',
        '到“系统设置 / 文档类型管理”确认该文档类型绑定到了正确的入口模块。',
      ],
      rawMessage: message,
      category: 'entry_module',
    };
  }

  if (status === 413 || message.includes('文件过大') || message.includes('too large')) {
    return {
      title: '文件过大，上传被拒绝',
      summary: '当前文件大小超出系统允许范围，服务器未接收该文件。',
      detailLines: [`后端返回：${message}`],
      actionLines: ['请压缩文件体积或拆分后重新上传。'],
      rawMessage: message,
      category: 'file',
    };
  }

  if (message.includes('文件类型') || message.includes('格式') || status === 415) {
    return {
      title: '文件格式不支持',
      summary: '当前文件格式不符合上传要求，服务器拒绝处理。',
      detailLines: [`后端返回：${message}`],
      actionLines: ['请确认上传的是 PDF 或 Word 文件，并检查文件是否损坏。'],
      rawMessage: message,
      category: 'file',
    };
  }

  return {
    title: '上传失败',
    summary: '文件未能成功上传到服务器，请根据下方信息检查原因。',
    detailLines: [
      `文档类型：${documentTypeDisplayName}`,
      `后端返回：${message}`,
    ],
    actionLines: [
      '如果是规则或入口配置问题，请先检查文档类型、规则集、入口模块三处配置。',
      '如暂时无法定位，可将下方后端原始提示发给后端同学继续排查。',
    ],
    rawMessage: message,
    category: 'unknown',
  };
}

/**
 * 将文件转换为二进制数据
 */
export async function uploadFileToBinary(file: File): Promise<ArrayBuffer> {
  return new Promise((resolve, reject) => {
    const reader = new FileReader();
    reader.onload = () => {
      if (reader.result instanceof ArrayBuffer) {
        resolve(reader.result);
      } else {
        reject(new Error('文件读取失败'));
      }
    };
    reader.onerror = () => reject(new Error('文件读取失败'));
    reader.readAsArrayBuffer(file);
  });
}

/**
 * 上传文件到文档审核系统
 * @param binaryData 文件的二进制数据
 * @param fileName 文件名
 * @param fileType 文件类型
 * @param typeId 文档类型ID
 * @param priority 优先级
 * @param documentNumber 文档编号（可选）
 * @param remark 备注信息（可选）
 * @param isTestDocument 是否为测试文档
 * @param documentId 关联的文档ID（用于合同附件上传）
 * @param isReupload 是否为重新上传
 * @param jwtToken JWT token
 * @returns 上传结果
 */
/**
 * 上传合同模板（用于与合同文档结构对比）
 * @param file 模板文件
 * @param documentId 源合同文档ID
 * @param comparisonId 已有对比记录ID（可选）
 * @param jwtToken JWT token
 * @returns 上传结果
 */
export async function uploadContractTemplate(
  file: File,
  documentId: number,
  comparisonId?: number,
  jwtToken?: string
): Promise<{data: LegacyUploadResponse; error?: never} | {data?: never; error: string; status?: number}> {
  try {
    console.log('【合同模板上传】开始上传模板:', { fileName: file.name, documentId, comparisonId });
    
    // 创建FormData对象
    const formData = new FormData();
    
    // 添加文件
    formData.append('file', file);
    
    // 添加上传信息
    const uploadInfo = {
      document_id: documentId,
      ...(comparisonId && { comparison_id: comparisonId })
    };
    
    formData.append('upload_info', JSON.stringify(uploadInfo));
    
    // 构建请求URL
    const uploadUrl = `${UPLOAD_URL}/upload_contract_template`;
    console.log('【合同模板上传】准备发送请求到服务器:', uploadUrl);
    
    // 设置请求头
    const headers: HeadersInit = {
      'Accept': 'application/json'
    };

    // 从 localStorage 获取 token
    if (typeof window !== 'undefined') {
      const token = localStorage.getItem('access_token');
      if (token) {
        headers['Authorization'] = `Bearer ${token}`;
      }
    }
    
    // 发送请求
    const response = await axios.post(uploadUrl, formData, {
      headers
    });

    console.log('【合同模板上传】服务器响应状态:', response.status);

    const result = response.data;
    console.log('【合同模板上传】服务器返回结果:', result);

    if (result.success) {
      return { data: result.result };
    } else {
      return { error: result.error || '合同模板上传失败' };
    }
    
  } catch (error) {
    console.error('【合同模板上传】上传过程中发生错误:', error);
    return {
      error: error instanceof Error ? error.message : '合同模板上传过程中发生未知错误'
    };
  }
}

/**
 * 合同文档追加附件并合并
 * @param documentId 合同文档ID
 * @param files 附件文件列表
 * @param mergeMode 合并模式：'overwrite'（覆盖原文档）或 'new'（新建文档记录）
 * @param isReprocess 是否触发重新处理
 * @param remark 备注
 * @param token JWT token（可选）
 * @returns 上传结果
 */
export async function appendContractAttachments(
  documentId: number,
  files: File[],
  mergeMode: 'overwrite' | 'new' = 'overwrite',
  isReprocess: boolean = true,
  remark?: string,
  token?: string
): Promise<{data: LegacyUploadResponse; error?: never} | {data?: never; error: string; status?: number}> {
  try {
    console.log('【合同附件追加】开始追加附件:', { documentId, fileCount: files.length, mergeMode });
    
    // 创建FormData对象
    const formData = new FormData();
    
    // 添加多个文件
    files.forEach(file => {
      formData.append('files', file);
    });
    
    // 新链路仅保留附件追加；mergeMode / remark 在后端暂不消费，但继续保留函数签名兼容旧页面调用。
    void mergeMode;
    void remark;

    // 构建请求URL
    const uploadUrl = `${API_BASE_URL}/api/documents/${documentId}/attachments`;
    console.log('【合同附件追加】准备发送请求到服务器:', uploadUrl);

    // 设置请求头
    const headers: HeadersInit = {
      'Accept': 'application/json'
    };

    // 使用传入的 token 或从 localStorage 获取
    const authToken = token || (typeof window !== 'undefined' ? localStorage.getItem('access_token') : null);
    if (authToken) {
      headers['Authorization'] = `Bearer ${authToken}`;
    }

    // 发送请求
    const response = await axios.post(uploadUrl, formData, {
      headers
    });

    console.log('【合同附件追加】服务器响应状态:', response.status);

    const result = response.data;
    console.log('【合同附件追加】服务器返回结果:', result);

    if (result?.data) {
      if (isReprocess) {
        await axios.post(
          `${API_BASE_URL}/api/audit/run`,
          {
            documentId,
            force: true,
            speed: 'normal',
          },
          { headers }
        );
      }

      return {
        data: {
          success: true,
          result: result.data,
          error: null,
        }
      };
    }
    return { error: result?.message || result?.msg || '附件追加失败' };
    
  } catch (error) {
    console.error('【合同附件追加】上传过程中发生错误:', error);
    return {
      error: error instanceof Error ? error.message : '附件追加过程中发生未知错误'
    };
  }
}

export async function uploadDocumentToServer(
  binaryData: ArrayBuffer,
  fileName: string,
  fileType: string,
  typeId: number,
  groupId?: number | null,
  region: string = "default",
  createdBy?: number,
  attachments?: File[],
  autoRun: boolean = true,
  speed: string = "normal",
  jwtToken?: string,
  onProgress?: (progress: UploadProgressInfo) => void,
): Promise<{ data: UploadResult } | { error: string; status?: number; payload?: UploadErrorPayload }> {
  try {
    const formData = new FormData();
    const blob = new Blob([binaryData], { type: fileType });
    formData.append("file", blob, fileName);
    formData.append("typeId", String(typeId));
    if (groupId) {
      formData.append("groupId", String(groupId));
    }
    (attachments || []).forEach((attachment) => {
      formData.append("attachments", attachment);
    });
    formData.append("region", region);
    formData.append("fileRole", "primary");
    if (createdBy !== undefined) {
      formData.append("createdBy", String(createdBy));
    }
    formData.append("autoRun", String(autoRun));
    formData.append("speed", speed);

    const headers: Record<string, string> = {
      "X-File-Name": encodeURIComponent(fileName),
    };
    if (jwtToken) {
      headers["Authorization"] = `Bearer ${jwtToken}`;
    }

    const response = await axios.post(`${API_BASE_URL}/api/upload`, formData, {
      headers,
      onUploadProgress: (event) => {
        const fileBlob = formData.get("file");
        const fallbackTotal = fileBlob instanceof Blob ? fileBlob.size : binaryData.byteLength;
        const total = Number(event.total || fallbackTotal);
        const loaded = Number(event.loaded || 0);
        if (!total || !onProgress) {
          return;
        }
        onProgress({
          loaded,
          total,
          percent: Math.min(100, Math.max(0, Number(((loaded / total) * 100).toFixed(2)))),
        });
      },
    });
    const body = response.data;

    // Result<DocumentUploadVO> envelope
    const uploadData: NewUploadResponse | undefined = body?.data;
    if (!uploadData || !uploadData.documentId) {
      return { error: body?.message || body?.msg || "上传响应解析失败", status: response.status, payload: body };
    }

    return {
      data: {
        success: true,
        documentId: uploadData.documentId,
        fileId: uploadData.fileId,
        fileName: uploadData.fileName,
        fileSize: binaryData.byteLength,
        typeId: uploadData.typeId,
        groupId: uploadData.groupId,
        region: uploadData.region,
        processingStatus: uploadData.processingStatus,
        duplicateUpload: uploadData.duplicateUpload,
      },
    };
  } catch (axiosError) {
    console.error("上传文档失败:", axiosError);
    if (axios.isAxiosError(axiosError)) {
      const serverMessage =
        (axiosError.response?.data as any)?.message ||
        (axiosError.response?.data as any)?.msg ||
        (axiosError.response?.data as any)?.error;
      return {
        error: serverMessage || `上传失败 (HTTP ${axiosError.response?.status || "unknown"})`,
        status: axiosError.response?.status,
        payload: axiosError.response?.data,
      };
    }
    return { error: axiosError instanceof Error ? axiosError.message : "上传失败" };
  }
}

/**
 * 获取当天的文档列表
 * @param userInfo 用户信息（必需）
 * @param token JWT token
 * @param documentTypeIds 文档类型 ID 列表（可选）
 * @returns 文档列表
 */
export async function getTodayDocuments(
  userInfo?: { user_id?: number; [key: string]: unknown },
  token?: string,
  documentTypeIds?: number[]
): Promise<{data: Document[]; error?: never} | {data?: never; error: string; status?: number}> {
  try {
    if (!userInfo?.user_id) {
      return { error: "没有找到用户信息，请刷新重试", status: 401 };
    }

    const today = dayjs().startOf("day").format("YYYY-MM-DD");
    const params: Record<string, string | number> = {
      page: 1,
      pageSize: 50,
      userId: userInfo.user_id,
      dateFrom: today,
    };

    const selectedModuleId = getSelectedModuleIdFromSession();
    if (selectedModuleId) {
      params.entry_module_id = selectedModuleId;
    } else if (documentTypeIds && documentTypeIds.length > 0) {
      params.type_ids = documentTypeIds.join(",");
    }

    const headers: Record<string, string> = {};
    if (token) {
      headers["Authorization"] = `Bearer ${token}`;
    }

    const response = await axios.get(`${API_BASE_URL}/api/documents/list`, { params, headers });
    const body = response.data;
    const items = body?.data?.documents || [];

    const documents: Document[] = items.map((doc: any) => ({
      id: doc.documentId,
      name: doc.fileName || doc.normalizedName || "未命名",
      type_id: doc.typeId || 0,
      file_size: doc.fileSize || 0,
      status: doc.processingStatus || "waiting",
      created_at: doc.updatedAt || "",
      document_number: String(doc.internalDocumentNo || ""),
      path: doc.ossUrl || "",
      audit_status: 0,
    }));

    return { data: documents };
  } catch (error) {
    console.error("获取当天文档列表失败:", error);
    return {
      error: error instanceof Error ? error.message : "获取当天文档列表失败",
      status: 500,
    };
  }
}

/**
 * 获取文档类型列表
 * @param token JWT token (可选)
 * @returns 文档类型列表
 */
export async function getDocumentTypes(token?: string): Promise<{data: DocumentType[]; error?: never} | {data?: never; error: string; status?: number}> {
  try {
    const documentTypeIds = getDocumentTypeIdsFromSession();
    const selectedModuleId = getSelectedModuleIdFromSession();
    const params: Record<string, string> = {};
    if (selectedModuleId) {
      params.entry_module_id = String(selectedModuleId);
    }

    const headers: Record<string, string> = {};
    if (token) {
      headers["Authorization"] = `Bearer ${token}`;
    }

    const [response, groupRoots] = await Promise.all([
      axios.get(`${API_BASE_URL}/api/v3/document-type-roots`, { params, headers }),
      fetchAllEvaluationPointGroupRoots(token),
    ]);
    const body = response.data;

    if (body?.data && Array.isArray(body.data)) {
      let types: DocumentType[] = body.data.map((item: {
        id: number;
        name: string;
        code?: string;
        entryModuleId?: number | null;
        entryModuleName?: string | null;
        isEnabled?: boolean;
        ruleSetIds?: number[];
      }) => {
        const matchedRoot = groupRoots.find((root: any) => Number(root?.id || 0) === Number(item.id));
        const childDocumentTypeIds = Array.isArray(matchedRoot?.children)
          ? Array.from(
              new Set(
                matchedRoot.children
                  .map((child: any) => Number(child?.document_type_id || 0))
                  .filter((childId: number) => childId > 0),
              ),
            )
          : [];

        return {
          id: item.id,
          name: item.name,
          code: item.code,
          entryModuleId: item.entryModuleId ?? null,
          entryModuleName: item.entryModuleName ?? null,
          isEnabled: item.isEnabled,
          ruleSetIds: item.ruleSetIds,
          childDocumentTypeIds,
        };
      });

      if (!selectedModuleId && documentTypeIds && documentTypeIds.length > 0) {
        types = types.filter((item) =>
          documentTypeIds.includes(item.id) ||
          (item.childDocumentTypeIds || []).some((childId) => documentTypeIds.includes(childId)),
        );
      }

      return { data: types };
    }
    return { error: body?.message || "获取文档类型失败", status: response.status };
  } catch (error) {
    console.error("获取文档类型列表失败:", error);
    return {
      error: error instanceof Error ? error.message : "获取文档类型列表失败",
      status: 500,
    };
  }
}

function mapSubtypeChild(child: any, root?: any): DocumentSubtypeGroup {
  const rawName = typeof child.name === "string" ? child.name.trim() : "";
  const rawCode = typeof child.code === "string" ? child.code.trim() : "";
  const isDefault = rawName === "通用" || rawCode.endsWith(".default");
  const entryModuleId = child.entry_module_id ?? root?.entry_module_id ?? null;
  const entryModuleName = child.entry_module_name ?? root?.entry_module_name ?? null;
  const rootGroupName = root?.name ?? null;

  return {
    id: child.id,
    name: child.name,
    code: child.code,
    documentTypeId: child.document_type_id,
    documentTypeName: child.document_type_name,
    rootGroupId: root?.id ?? null,
    rootGroupName,
    entryModuleId: typeof entryModuleId === "number" ? entryModuleId : null,
    entryModuleName,
    isDefault,
    displayName: isDefault ? `默认子类型（${rawName || "通用"}）` : rawName || child.name,
    displayHint: [rootGroupName, child.document_type_name, entryModuleName, rawCode].filter(Boolean).join(" · "),
  };
}

function dedupeSubtypeGroups(groups: DocumentSubtypeGroup[]): DocumentSubtypeGroup[] {
  const groupMap = new Map<number, DocumentSubtypeGroup>();
  groups.forEach((group) => {
    const existing = groupMap.get(group.id);
    if (!existing) {
      groupMap.set(group.id, group);
      return;
    }
    const currentScore = (group.rootGroupName ? 2 : 0) + (group.entryModuleId ? 1 : 0);
    const existingScore = (existing.rootGroupName ? 2 : 0) + (existing.entryModuleId ? 1 : 0);
    if (currentScore > existingScore) {
      groupMap.set(group.id, group);
    }
  });
  return Array.from(groupMap.values());
}

async function fetchAllEvaluationPointGroupRoots(token?: string): Promise<any[]> {
  const headers: Record<string, string> = {};
  if (token) {
    headers["Authorization"] = `Bearer ${token}`;
  }

  const allResponse = await axios.get(`${API_BASE_URL}/api/v3/evaluation-point-groups/all`, {
    params: {
      include_disabled: false,
      with_rule_count: false,
    },
    headers,
  });

  return extractApiData<any[]>(allResponse.data) || [];
}

function collectSubtypeGroupsFromRoots(
  roots: any[],
  rootOrDocumentTypeId: number,
  entryModuleId?: number | null,
): DocumentSubtypeGroup[] {
  const scopedRoots = roots.filter((root: any) => {
    if (entryModuleId && Number(root?.entry_module_id || 0) !== Number(entryModuleId)) {
      return false;
    }
    return true;
  });

  const matchedRoot = scopedRoots.find((root: any) => Number(root?.id || 0) === Number(rootOrDocumentTypeId));
  if (matchedRoot && Array.isArray(matchedRoot.children)) {
    return dedupeSubtypeGroups(matchedRoot.children.map((child: any) => mapSubtypeChild(child, matchedRoot)));
  }

  return dedupeSubtypeGroups(
    scopedRoots.flatMap((root: any) => {
      if (!Array.isArray(root?.children)) return [];
      return root.children
        .filter((child: any) => Number(child?.document_type_id || 0) === Number(rootOrDocumentTypeId))
        .map((child: any) => mapSubtypeChild(child, root));
    }),
  );
}

export async function getDocumentSubtypeGroupsMap(
  documentTypeIds: number[],
  token?: string,
): Promise<{ data: Record<number, DocumentSubtypeGroup[]>; error?: never } | { data?: never; error: string; status?: number }> {
  try {
    if (!documentTypeIds.length) {
      return { data: {} };
    }

    const roots = await fetchAllEvaluationPointGroupRoots(token);
    const ids = Array.from(new Set(documentTypeIds.map((id) => Number(id)).filter(Boolean)));
    const grouped = Object.fromEntries(
      ids.map((documentTypeId) => [documentTypeId, collectSubtypeGroupsFromRoots(roots, documentTypeId)]),
    );

    return { data: grouped };
  } catch (error) {
    console.error("批量获取子类型分组失败:", error);
    return {
      error: error instanceof Error ? error.message : "批量获取子类型分组失败",
      status: 500,
    };
  }
}

export async function getDocumentSubtypeGroups(
  documentTypeId: number,
  token?: string,
  entryModuleId?: number | null,
): Promise<{ data: DocumentSubtypeGroup[]; error?: never } | { data?: never; error: string; status?: number }> {
  try {
    const headers: Record<string, string> = {};
    if (token) {
      headers["Authorization"] = `Bearer ${token}`;
    }

    const allRoots = await fetchAllEvaluationPointGroupRoots(token);
    const matchedFromTree = collectSubtypeGroupsFromRoots(allRoots, documentTypeId, entryModuleId);

    if (matchedFromTree.length > 0) {
      return { data: matchedFromTree };
    }

    const response = await axios.get(`${API_BASE_URL}/api/v3/evaluation-point-groups/by-document-types`, {
      params: {
        document_type_ids: String(documentTypeId),
        include_disabled: false,
        with_rule_count: false,
      },
      headers,
    });
    const roots = extractApiData<any[]>(response.data) || [];
    const filteredRoots = entryModuleId
      ? roots.filter((root: any) => Number(root?.entry_module_id || 0) === Number(entryModuleId))
      : roots;
    const fallbackRoots = filteredRoots.length > 0 ? filteredRoots : roots;
    const groups = dedupeSubtypeGroups(
      fallbackRoots.flatMap((root: any) =>
        Array.isArray(root?.children)
          ? root.children
              .filter((child: any) => Number(child?.document_type_id || 0) === Number(documentTypeId))
              .map((child: any) => mapSubtypeChild(child, root))
          : [],
      ),
    );
    return { data: groups };
  } catch (error) {
    console.error("获取子类型分组失败:", error);
    return {
      error: error instanceof Error ? error.message : "获取子类型分组失败",
      status: 500,
    };
  }
}

/**
 * 获取指定文档的状态
 * @param documentIds 文档ID列表
 * @param attachmentIds 合同附件ID列表（可选）
 * @param token JWT token (可选)
 * @returns 文档状态列表
 */
export async function getDocumentsStatus(
  documentIds: number[],
  attachmentIds?: number[],
  token?: string
): Promise<{data: Document[]; error?: never} | {data?: never; error: string; status?: number}> {
  try {
    if ((!documentIds || documentIds.length === 0) && (!attachmentIds || attachmentIds.length === 0)) {
      return { data: [] };
    }
    const headers: Record<string, string> = {};
    if (token) {
      headers["Authorization"] = `Bearer ${token}`;
    }

    const normalizedIds = Array.from(new Set(documentIds.filter(id => Number.isFinite(id) && id > 0)));
    const allData: Document[] = [];

    if (normalizedIds.length > 0) {
      const response = await axios.get(`${API_BASE_URL}/api/documents/status`, {
        params: { ids: normalizedIds.join(",") },
        headers,
      });
      const statusItems = extractApiData<Array<{
        documentId: number;
        processingStatus?: string | null;
        updatedAt?: string | null;
      }>>(response.data) || [];

      statusItems.forEach(item => {
        allData.push({
          id: item.documentId,
          name: `文档_${item.documentId}`,
          type_id: 0,
          file_size: 0,
          status: (item.processingStatus as DocumentStatus) || DocumentStatus.waiting,
          created_at: item.updatedAt || "",
        });
      });
    }

    if (attachmentIds && attachmentIds.length > 0) {
      const attachmentParams: PostgrestParams = {
        select: 'id, status',
        filter: {
          'id': `in.(${attachmentIds.join(',')})`
        }
      };
      const attachmentResponse = await postgrestGet<ContractStructureComparison[]>('/api/postgrest/proxy/contract_structure_comparison', { ...attachmentParams, token });
      if (attachmentResponse.error) {
        return { error: attachmentResponse.error, status: attachmentResponse.status };
      }

      const extractedAttachments = extractApiData<ContractStructureComparison[]>(attachmentResponse.data) || [];
      extractedAttachments.forEach(item => {
        allData.push({
          id: item.id,
          name: item.template_contract_name || `合同结构比较记录_${item.id}`,
          type_id: 1,
          file_size: item.file_size || 0,
          status: item.status,
          created_at: item.created_at
        });
      });
    }

    return { data: allData };
  } catch (error) {
    console.error('获取文档状态失败:', error);
    return {
      error: error instanceof Error ? error.message : '获取文档状态失败',
      status: 500
    };
  }
}