import { router } from '@kit.ArkUI';
import { AccountViewModel } from '../viewmodel/AccountViewModel';
import { Account } from '../model/Account';
import { AccountCard } from '../view/components/AccountCard';
import { TOTPGenerator } from '../common/utils/TOTPGenerator';
import { StorageUtil } from '../common/utils/StorageUtil';
import { hilog } from '@kit.PerformanceAnalysisKit';
import { AppConstants } from '../common/constants/AppConstants';
import { pasteboard } from '@kit.BasicServicesKit';
import { promptAction } from '@kit.ArkUI';

/**
 * 账户列表主页面
 */
@Entry
@Component
struct AccountListPage {
  @State accounts: Account[] = [];
  @State codes: Map<string, string> = new Map();
  @State progress: number = 0;
  @State remainingSeconds: number = 30;
  @State searchText: string = '';
  private viewModel: AccountViewModel = new AccountViewModel();
  private timer: number = -1;

  async aboutToAppear(): Promise<void> {
    // 初始化存储
    try {
      await StorageUtil.init(getContext(this));
      hilog.info(AppConstants.LOG_DOMAIN, AppConstants.LOG_TAG, 'Storage initialized');
    } catch (error) {
      hilog.error(AppConstants.LOG_DOMAIN, AppConstants.LOG_TAG, 'Failed to init storage: %{public}s', JSON.stringify(error));
    }

    // 设置更新回调
    this.viewModel.setUpdateCallback(() => {
      this.updateAccounts();
    });

    // 加载账户
    await this.viewModel.loadAccounts();
    this.updateAccounts();

    // 启动定时器更新验证码
    this.startTimer();
  }

  aboutToDisappear(): void {
    this.stopTimer();
  }

  /**
   * 页面显示时重新加载账户
   * 处理从添加/编辑页面返回的情况
   */
  onPageShow(): void {
    // 重新加载账户数据
    this.viewModel.loadAccounts();
  }

  /**
   * 更新账户列表
   */
  private updateAccounts(): void {
    if (this.searchText) {
      this.accounts = this.viewModel.searchAccounts(this.searchText);
    } else {
      this.accounts = this.viewModel.getAccounts();
    }
  }

  /**
   * 启动定时器
   */
  private startTimer(): void {
    // 立即生成一次验证码
    this.generateAllCodes();

    // 每秒更新一次
    this.timer = setInterval(() => {
      this.updateProgress();
      this.generateAllCodes();
    }, 1000);
  }

  /**
   * 停止定时器
   */
  private stopTimer(): void {
    if (this.timer !== -1) {
      clearInterval(this.timer);
      this.timer = -1;
    }
  }

  /**
   * 更新进度
   */
  private updateProgress(): void {
    this.progress = TOTPGenerator.getProgress();
    this.remainingSeconds = TOTPGenerator.getRemainingSeconds();
  }

  /**
   * 生成所有账户的验证码
   */
  private async generateAllCodes(): Promise<void> {
    for (const account of this.accounts) {
      try {
        const code = await this.viewModel.generateCode(account);
        this.codes.set(account.id, code);
      } catch (error) {
        hilog.error(AppConstants.LOG_DOMAIN, AppConstants.LOG_TAG, 'Failed to generate code: %{public}s', JSON.stringify(error));
      }
    }
  }

  /**
   * 复制验证码到剪贴板
   */
  private copyToClipboard(account: Account): void {
    const code = this.codes.get(account.id) || '------';
    if (code !== '------') {
      const pasteData = pasteboard.createData(pasteboard.MIMETYPE_TEXT_PLAIN, code);
      const systemPasteboard = pasteboard.getSystemPasteboard();
      systemPasteboard.setData(pasteData);
    }
  }

  /**
   * 删除账户
   */
  private async deleteAccount(account: Account): Promise<void> {
    promptAction.showDialog({
      title: $r('app.string.delete_confirm'),
      buttons: [
        { text: $r('app.string.cancel'), color: $r('app.color.text_secondary') },
        { text: $r('app.string.delete'), color: $r('app.color.danger_color') }
      ]
    }).then(async (result) => {
      if (result.index === 1) {
        await this.viewModel.deleteAccount(account.id);
        this.updateAccounts();
      }
    });
  }

  /**
   * 编辑账户
   */
  private editAccount(account: Account): void {
    router.pushUrl({
      url: 'pages/AccountDetailPage',
      params: { accountId: account.id }
    });
  }

  /**
   * 添加账户
   */
  private addAccount(): void {
    router.pushUrl({
      url: 'pages/AddAccountPage'
    });
  }

  build() {
    Column() {
      // 顶部导航栏
      Row() {
        Text($r('app.string.app_name'))
          .fontSize($r('app.float.title_large'))
          .fontColor($r('app.color.text_primary'))
          .fontWeight(FontWeight.Bold)

        Blank()

        // 添加按钮
        Button({ type: ButtonType.Circle }) {
          Text('+')
            .fontSize(28)
            .fontColor($r('app.color.card_background'))
        }
        .width(40)
        .height(40)
        .backgroundColor($r('app.color.primary_color'))
        .onClick(() => {
          this.addAccount();
        })
      }
      .width('100%')
      .padding({
        left: $r('app.float.spacing_large'),
        right: $r('app.float.spacing_large'),
        top: $r('app.float.spacing_large'),
        bottom: $r('app.float.spacing_medium')
      })

      // 搜索框
      if (this.accounts.length > 0) {
        Search({ placeholder: $r('app.string.search') })
          .margin({
            left: $r('app.float.spacing_large'),
            right: $r('app.float.spacing_large'),
            bottom: $r('app.float.spacing_medium')
          })
          .onChange((value: string) => {
            this.searchText = value;
            this.updateAccounts();
          })
      }

      // 账户列表
      if (this.accounts.length === 0) {
        // 空状态
        Column({ space: 12 }) {
          Text($r('app.string.no_accounts'))
            .fontSize($r('app.float.body_large'))
            .fontColor($r('app.color.text_secondary'))
          Text($r('app.string.no_accounts_tip'))
            .fontSize($r('app.float.body_medium'))
            .fontColor($r('app.color.text_tertiary'))
        }
        .width('100%')
        .layoutWeight(1)
        .justifyContent(FlexAlign.Center)
      } else {
        // 账户列表
        List({ space: 12 }) {
          ForEach(this.accounts, (account: Account) => {
            ListItem() {
              AccountCard({
                account: account,
                code: this.codes.get(account.id) || '------',
                progress: this.progress,
                remainingSeconds: this.remainingSeconds,
                onCopy: (acc: Account) => {
                  this.copyToClipboard(acc);
                },
                onEdit: (acc: Account) => {
                  this.editAccount(acc);
                },
                onDelete: (acc: Account) => {
                  this.deleteAccount(acc);
                }
              })
            }
          }, (account: Account) => account.id)
        }
        .width('100%')
        .layoutWeight(1)
        .padding({
          left: $r('app.float.spacing_large'),
          right: $r('app.float.spacing_large')
        })
      }
    }
    .width('100%')
    .height('100%')
    .backgroundColor($r('app.color.background_color'))
  }
}