import * as vscode from "vscode";
import { getWebviewContent } from "./webviewContent";
import { isTokenExpired } from "../utils/jwtUtils";
import {
  handleUserMessage,
  insertCodeToEditor,
  handleReadFile,
  handleCreateFile,
  handleUpdateFile,
  handleRenameFile,
  handleReplaceInFile,
  handleUserAnswer,
  abortCurrentDialog,
  handleOptimizePrompt,
} from "../utils/messageHandler";

/**
 * 创建并显示IC 侧边栏视图
 */
export function showICHelperPanel(context: vscode.ExtensionContext) {
  // 创建WebView面板
  const panel = vscode.window.createWebviewPanel(
    "icCoder", // 面板ID
    "IC Coder", // 面板标题
    vscode.ViewColumn.Beside, // 显示在旁边
    {
      enableScripts: true,
      retainContextWhenHidden: true,
      localResourceRoots: [
        vscode.Uri.joinPath(context.extensionUri, "media"),
        vscode.Uri.joinPath(context.extensionUri, "src", "assets")
      ],
    }
  );

  // 设置标签页图标
  panel.iconPath = vscode.Uri.joinPath(
    context.extensionUri,
    "media",
    "icon.png"
  );

  // 获取页面内图标URI
  const iconUri = panel.webview.asWebviewUri(
    vscode.Uri.joinPath(context.extensionUri, "media", "icon.png")
  );

  // 获取模型图标URI
  const autoIconUri = panel.webview.asWebviewUri(
    vscode.Uri.joinPath(context.extensionUri, "src", "assets", "model", "Auto.png")
  );
  const liteIconUri = panel.webview.asWebviewUri(
    vscode.Uri.joinPath(context.extensionUri, "src", "assets", "model", "lite.png")
  );
  const syIconUri = panel.webview.asWebviewUri(
    vscode.Uri.joinPath(context.extensionUri, "src", "assets", "model", "Sy.png")
  );
  const maxIconUri = panel.webview.asWebviewUri(
    vscode.Uri.joinPath(context.extensionUri, "src", "assets", "model", "Max.png")
  );

  // 获取二维码图片URI
  const qrCodeUri = panel.webview.asWebviewUri(
    vscode.Uri.joinPath(context.extensionUri, "src", "assets", "QRCode", "wx.png")
  );

  // 获取Logo URI
  const logoUri = panel.webview.asWebviewUri(
    vscode.Uri.joinPath(context.extensionUri, "media", "homepage-logo.png")
  );

  // 设置HTML内容
  panel.webview.html = getWebviewContent(
    iconUri.toString(),
    autoIconUri.toString(),
    liteIconUri.toString(),
    syIconUri.toString(),
    maxIconUri.toString(),
    qrCodeUri.toString(),
    logoUri.toString()
  );

  // 处理消息
  panel.webview.onDidReceiveMessage(
    (message) => {
      console.log("[ICViewProvider] ====== 收到 WebView 消息 ======");
      console.log("[ICViewProvider] command:", message.command);
      console.log("[ICViewProvider] 完整消息:", JSON.stringify(message));
      switch (message.command) {
        case "sendMessage":
          handleUserMessage(panel, message.text, context.extensionPath, message.mode);
          break;
        case "readFile":
          handleReadFile(panel, message.filePath);
          break;
        case "updateFile":
          handleUpdateFile(panel, message.filePath, message.content);
          break;
        case "renameFile":
          handleRenameFile(panel, message.oldPath, message.newPath);
          break;
        case "replaceInFile":
          handleReplaceInFile(
            panel,
            message.filePath,
            message.searchText,
            message.replaceText
          );
          break;
        case "insertCode":
          insertCodeToEditor(message.code);
          break;
        case "createFile":
          handleCreateFile(
            panel,
            message.filePath,
            message.content,
            message.overwrite
          );
          break;
        case "showInfo":
          vscode.window.showInformationMessage(message.text);
          break;
        case "showWarning":
          vscode.window.showWarningMessage(message.message);
          break;
        // 新增：处理用户回答
        case "submitAnswer":
          handleUserAnswer(
            message.askId,
            message.selected,
            message.customInput
          );
          break;
        // 新增：中止对话
        case "abortDialog":
          void abortCurrentDialog();
          break;
        // 新增：优化提示词
        case "optimizePrompt":
          handleOptimizePrompt(panel, message.prompt);
          break;
      }
    },
    undefined,
    context.subscriptions
  );
}

/**
 * 侧边栏视图提供者
 */
export class ICViewProvider implements vscode.WebviewViewProvider {
  private _view?: vscode.WebviewView;

  constructor(
    private readonly extensionUri: vscode.Uri,
    private readonly context: vscode.ExtensionContext
  ) {
    // 监听认证状态变化
    this.context.subscriptions.push(
      vscode.authentication.onDidChangeSessions((e) => {
        if (e.provider.id === "iccoder") {
          this.refreshLoginStatus();
        }
      })
    );
  }

  /**
   * 刷新登录状态并更新视图
   */
  private async refreshLoginStatus(): Promise<void> {
    if (this._view) {
      const isLoggedIn = await this.checkLoginStatus();
      this._view.webview.html = this.getWebviewContent(
        this._view.webview,
        isLoggedIn
      );
    }
  }

  /**
   * 检查登录状态（使用 Authentication API）
   */
  private async checkLoginStatus(): Promise<boolean> {
    try {
      const session = await vscode.authentication.getSession("iccoder", [], { createIfNone: false });
      console.log("[ICViewProvider] 检查登录状态, session:", session ? "存在" : "不存在");
      if (!session) {
        return false;
      }
      // 检查 token 是否过期
      const expired = isTokenExpired(session.accessToken);
      console.log("[ICViewProvider] token 过期检查结果:", expired);
      // 只有明确过期才认为未登录，无法判断时认为已登录
      if (expired === true) {
        console.log("[ICViewProvider] Token 已过期");
        return false;
      }
      return true;
    } catch (error) {
      console.log("[ICViewProvider] 检查登录状态失败:", error);
      return false;
    }
  }

  resolveWebviewView(webviewView: vscode.WebviewView) {
    console.log('[ICViewProvider] ========== resolveWebviewView 被调用 ==========');

    // 保存引用以便后续刷新
    this._view = webviewView;

    webviewView.webview.options = {
      enableScripts: true,
      localResourceRoots: [
        vscode.Uri.joinPath(this.extensionUri, "media"),
        vscode.Uri.joinPath(this.extensionUri, "src", "assets")
      ],
    };

    console.log('[ICViewProvider] Webview options 已设置');
    console.log('[ICViewProvider] extensionUri:', this.extensionUri.toString());

    // 【关键修复】先设置默认 HTML，避免一直加载
    try {
      const html = this.getWebviewContent(webviewView.webview, false);
      console.log('[ICViewProvider] HTML 内容已生成，长度:', html.length);
      webviewView.webview.html = html;
      console.log('[ICViewProvider] HTML 已设置到 webview');
    } catch (error) {
      console.error('[ICViewProvider] 设置 HTML 失败:', error);
    }

    // 异步检查登录状态并更新 UI
    this.checkLoginStatus()
      .then((isLoggedIn) => {
        console.log('[ICViewProvider] 登录状态检查完成:', isLoggedIn);
        webviewView.webview.html = this.getWebviewContent(
          webviewView.webview,
          isLoggedIn
        );
      })
      .catch((error) => {
        console.error('[ICViewProvider] 检查登录状态失败:', error);
        // 即使失败也显示未登录状态
        webviewView.webview.html = this.getWebviewContent(webviewView.webview, false);
      });

    // 处理侧边栏的消息
    webviewView.webview.onDidReceiveMessage(
      (message) => {
        if (message.command === "openChat") {
          vscode.commands.executeCommand("ic-coder.openChat");
        } else if (message.command === "login") {
          vscode.commands.executeCommand("ic-coder.login");
        } else if (message.command === "logout") {
          // 退出登录（前端已有确认对话框）
          vscode.commands.executeCommand("ic-coder.logout");
        } else if (message.command === "openICCoder") {
          // 打开 IC Coder 官网
          vscode.env.openExternal(vscode.Uri.parse('https://www.iccoder.com'));
        } else if (message.command === "openExternalUrl") {
          // 打开外部链接
          if (message.url) {
            vscode.env.openExternal(vscode.Uri.parse(message.url));
          }
        }
      },
      undefined,
      this.context.subscriptions
    );
  }

  private getWebviewContent(
    webview: vscode.Webview,
    isLoggedIn: boolean
  ): string {
    console.log('[ICViewProvider] 开始生成 HTML 内容, isLoggedIn:', isLoggedIn);

    const logoUri = webview.asWebviewUri(
      vscode.Uri.joinPath(this.extensionUri, "media", "icon.png")
    );

    return `<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <style>
    body {
      margin: 0;
      padding: 0;
      font-family: var(--vscode-font-family);
      color: var(--vscode-foreground);
      height: 100vh;
      display: flex;
      justify-content: center;
      align-items: center;
      background: linear-gradient(135deg,
        var(--vscode-editor-background) 0%,
        color-mix(in srgb, var(--vscode-editor-background) 85%, var(--vscode-button-background) 15%) 50%,
        color-mix(in srgb, var(--vscode-editor-background) 90%, var(--vscode-button-background) 10%) 100%);
    }
    .container {
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      text-align: center;
      padding: 20px;
    }
    .container img {
      margin-bottom: 16px;
    }
    .container h2 {
      margin: 0 0 16px 0;
    }
    .btn {
      width: 200px;
      padding: 8px 12px;
      margin: 4px 0;
      background: #007ACC;
      color: #ffffff;
      border: none;
      border-radius: 4px;
      cursor: pointer;
      text-align: center;
    }
    .btn:hover {
      background: #005a9e;
    }
  </style>
</head>
<body>
  <div class="container">
    <img src="${logoUri}" alt="IC Coder" width="120" />
    <h2>欢迎使用 IC Coder</h2>
    ${isLoggedIn
      ? '<button class="btn" onclick="openChat()">开始创作</button>'
      : '<button class="btn" onclick="login()">登录账户</button>'
    }
  </div>
  <script>
    console.log('[Webview] 脚本已加载');
    const vscode = acquireVsCodeApi();

    function openChat() {
      console.log('[Webview] 点击开始创作');
      vscode.postMessage({ command: 'openChat' });
    }

    function login() {
      console.log('[Webview] 点击登录');
      vscode.postMessage({ command: 'login' });
    }

    console.log('[Webview] 初始化完成');
  </script>
</body>
</html>`;
  }
}