/**
 * API 客户端
 * 封装与后端的 HTTP 通信
 */
import * as vscode from "vscode";
import * as https from "https";
import * as http from "http";
import { URL } from "url";
import { getApiUrl, getConfig } from "../config/settings";
import type {
  ToolCallResult,
  AnswerRequest,
  ToolResultResponse,
  AnswerResponse,
  ToolConfirmResponse,
  UserInfoResponse,
  InvitationVerifyRequest,
  InvitationVerifyResponse,
  InvitationStatusResponse,
} from "../types/api";

/**
 * HTTP 请求选项
 */
interface RequestOptions {
  method: "GET" | "POST" | "PUT" | "DELETE";
  headers?: Record<string, string>;
  body?: unknown;
  timeout?: number;
}

/**
 * 获取当前登录的 Token
 */
async function getAuthToken(): Promise<string | undefined> {
  try {
    const session = await vscode.authentication.getSession("iccoder", [], {
      silent: true,
    });
    return session?.accessToken;
  } catch {
    return undefined;
  }
}

/**
 * 发送 HTTP 请求
 */
async function request<T>(path: string, options: RequestOptions): Promise<T> {
  const url = new URL(getApiUrl(path));
  const { timeout } = getConfig();

  // 自动获取 Token
  const token = await getAuthToken();

  const isHttps = url.protocol === "https:";
  const httpModule = isHttps ? https : http;

  const requestOptions: http.RequestOptions = {
    hostname: url.hostname,
    port: url.port || (isHttps ? 443 : 80),
    path: url.pathname + url.search,
    method: options.method,
    headers: {
      "Content-Type": "application/json",
      ...(token ? { Authorization: `Bearer ${token}` } : {}),
      ...options.headers,
    },
    timeout: options.timeout || timeout,
  };

  console.log("[HTTP] 请求详情:", {
    url: url.toString(),
    method: options.method,
    headers: requestOptions.headers,
    hasToken: !!token,
    body: options.body,
  });

  return new Promise((resolve, reject) => {
    const req = httpModule.request(requestOptions, (res) => {
      let data = "";

      // console.log('[HTTP] 响应状态码:', res.statusCode);
      // console.log('[HTTP] 响应头:', res.headers);

      res.on("data", (chunk) => {
        data += chunk;
      });

      res.on("end", () => {
        console.log("[HTTP] 响应体:", data);
        try {
          const json = JSON.parse(data);
          // console.log('[HTTP] 解析后的响应:', JSON.stringify(json, null, 2));

          if (res.statusCode && res.statusCode >= 200 && res.statusCode < 300) {
            console.log("[HTTP] 请求成功");
            resolve(json as T);
          } else {
            console.error("[HTTP] 请求失败:", {
              statusCode: res.statusCode,
              error: json.error,
              message: json.message,
              msg: json.msg,
            });
            reject(
              new Error(
                json.error ||
                  json.message ||
                  json.msg ||
                  `HTTP ${res.statusCode}`,
              ),
            );
          }
        } catch (e) {
          // console.error('[HTTP] 解析响应失败:', e);
          // console.error('[HTTP] 原始响应:', data);
          reject(new Error(`解析响应失败: ${data}`));
        }
      });
    });

    req.on("error", (error) => {
      // console.error('[HTTP] 请求错误:', error);
      reject(error);
    });

    req.on("timeout", () => {
      // console.error('[HTTP] 请求超时');
      req.destroy();
      reject(new Error("请求超时"));
    });

    if (options.body) {
      const bodyStr = JSON.stringify(options.body);
      // console.log('[HTTP] 发送请求体:', bodyStr);
      req.write(bodyStr);
    }

    req.end();
    // console.log('[HTTP] 请求已发送');
  });
}

/**
 * 提交工具执行结果
 * POST /api/tool/result
 */
export async function submitToolResult(
  result: ToolCallResult,
): Promise<ToolResultResponse> {
  console.log(`[API] 提交工具结果: callId=${result.id}`);
  return request<ToolResultResponse>("/api/tool/result", {
    method: "POST",
    body: result,
  });
}

/**
 * 提交用户回答
 * POST /api/task/answer
 */
export async function submitAnswer(
  answer: AnswerRequest,
): Promise<AnswerResponse> {
  console.log(`[API] 提交用户回答: askId=${answer.askId}`);
  return request<AnswerResponse>("/api/task/answer", {
    method: "POST",
    body: answer,
  });
}

/**
 * 提交工具确认响应（Ask 模式）
 * POST /api/tool/confirm
 */
export async function submitToolConfirm(
  response: ToolConfirmResponse,
): Promise<ToolResultResponse> {
  console.log(
    `[API] 提交工具确认: confirmId=${response.confirmId}, approved=${response.approved}`,
  );
  return request<ToolResultResponse>("/api/tool/confirm", {
    method: "POST",
    body: response,
  });
}

/**
 * 健康检查
 * GET /api/dialog/health
 */
export async function healthCheck(): Promise<{ status: string }> {
  return request<{ status: string }>("/api/dialog/health", {
    method: "GET",
    timeout: 5000,
  });
}

/**
 * 停止对话请求
 */
export interface StopDialogRequest {
  taskId: string;
}

/**
 * 停止对话响应
 */
export interface StopDialogResponse {
  success: boolean;
  taskId: string;
  message?: string;
  error?: string;
}

/**
 * 停止对话
 * POST /api/dialog/stop
 */
export async function stopDialog(taskId: string): Promise<StopDialogResponse> {
  console.log(`[API] 停止对话: taskId=${taskId}`);
  return request<StopDialogResponse>("/api/dialog/stop", {
    method: "POST",
    body: { taskId },
  });
}

/** 压缩对话响应 */
export interface CompactDialogResponse {
  success: boolean;
  taskId: string;
  message?: string;
  error?: string;
}

/**
 * 手动压缩对话历史
 * POST /api/dialog/compact
 */
export async function compactDialog(
  taskId: string,
): Promise<CompactDialogResponse> {
  console.log(`[API] 压缩对话: taskId=${taskId}`);
  return request<CompactDialogResponse>("/api/dialog/compact", {
    method: "POST",
    body: { taskId },
  });
}

/**
 * 创建成功的工具结果
 */
export function createSuccessResult(id: number, text: string): ToolCallResult {
  return {
    jsonrpc: "2.0",
    id,
    result: {
      content: [{ type: "text", text }],
      isError: false,
    },
  };
}

/**
 * 创建业务错误的工具结果（如编译失败）
 */
export function createBusinessErrorResult(
  id: number,
  errorMessage: string,
): ToolCallResult {
  return {
    jsonrpc: "2.0",
    id,
    result: {
      content: [{ type: "text", text: errorMessage }],
      isError: true,
    },
  };
}

/**
 * 创建系统错误的工具结果
 */
export function createSystemErrorResult(
  id: number,
  code: number,
  message: string,
): ToolCallResult {
  return {
    jsonrpc: "2.0",
    id,
    error: { code, message },
  };
}

/**
 * 获取用户信息
 * GET /system/user/getInfo
 */
export async function getUserInfo(): Promise<UserInfoResponse> {
  console.log("[API] 获取用户信息");
  return request<UserInfoResponse>("/system/user/getInfo", {
    method: "GET",
  });
}

/** 余额查询响应 */
export interface CreditBalanceResponse {
  success: boolean;
  balance?: number;
  error?: string;
}

/**
 * 查询用户资源点余额
 * GET /api/dialog/balance?userId=xxx
 */
export async function getCreditBalance(
  userId: string,
): Promise<CreditBalanceResponse> {
  console.log("[API] 查询余额: userId=", userId);
  return request<CreditBalanceResponse>(
    `/api/dialog/balance?userId=${userId}`,
    {
      method: "GET",
      timeout: 5000,
    },
  );
}

/**
 * 验证邀请码
 * POST /api/invitation/verify
 */
export async function verifyInvitationCode(
  code: string,
): Promise<InvitationVerifyResponse> {
  // console.log('[API] 验证邀请码 - 开始');
  console.log("[API] 邀请码:", code);
  const body: InvitationVerifyRequest = { code };
  console.log("[API] 请求体:", JSON.stringify(body));

  try {
    const response = await request<InvitationVerifyResponse>(
      "/api/invitation/verify",
      {
        method: "POST",
        body,
      },
    );
    console.log("[API] 验证邀请码 - 响应:", JSON.stringify(response));
    return response;
  } catch (error) {
    console.error("[API] 验证邀请码 - 错误:", error);
    throw error;
  }
}

/**
 * 查询邀请码验证状态
 * GET /api/invitation/status
 */
export async function checkInvitationStatus(): Promise<InvitationStatusResponse> {
  console.log("[API] 查询邀请码验证状态");
  return request<InvitationStatusResponse>("/api/invitation/status", {
    method: "GET",
  });
}

/**
 * 重置邀请码验证状态（退出登录时调用）
 * POST /api/invitation/reset
 */
export async function resetInvitationVerification(): Promise<{
  code: number;
  msg: string;
}> {
  console.log("[API] 重置邀请码验证状态");
  try {
    const response = await request<{ code: number; msg: string }>(
      "/api/invitation/reset",
      {
        method: "POST",
      },
    );
    console.log("[API] 重置邀请码验证状态 - 响应:", JSON.stringify(response));
    return response;
  } catch (error) {
    console.warn("[API] 重置邀请码验证状态 - 错误:", error);
    // 即使失败也不影响退出登录流程
    throw error;
  }
}