/**
 * 上传结果上报抽象（Reporter）。
 * 默认实现为控制台输出，可扩展为企业微信、钉钉等通知。
 */

import chalk from 'chalk';
import { SingleBar, Presets } from 'cli-progress';

export type UploadStatus = 'success' | 'failed' | 'skipped';

/** 单个文件的上传结果，供 Reporter 使用 */
export interface UploadFileResult {
  localPath: string;
  relativePath: string;
  bucket: string;
  key: string;
  status: UploadStatus;
  error?: Error;
  /** 配置了 CDN 时的完整访问地址，由 buildCdnAccessUrl 生成 */
  accessUrl?: string;
}

/** 整次上传的汇总统计（含前缀等上下文，便于查验） */
export interface UploadSummary {
  total: number;
  success: string[];
  failed: string[];
  skipped: string[];
  /** 本次上传的前缀/配置，供报告展示 */
  context?: {
    bucket: string;
    basePrefix: string;
    pathPrefix?: string;
    localDir: string;
    cdnBaseUrl?: string;
  };
}

/** Reporter 接口：上传开始、进度、每个文件结果、全部完成时回调 */
export interface Reporter {
  onStart?(context: {
    env?: string;
    bucket: string;
    basePrefix: string;
    pathPrefix?: string;
    localDir: string;
    cdnBaseUrl?: string;
  }): void | Promise<void>;

  /** 每完成一个文件后调用，便于显示进度（当前数、总数） */
  onProgress?(current: number, total: number): void | Promise<void>;

  onFileResult?(result: UploadFileResult): void | Promise<void>;

  onComplete?(summary: UploadSummary): void | Promise<void>;
}

/** 默认实现：将上传进度与结果输出到控制台 */
export class ConsoleReporter implements Reporter {
  private progressBar: SingleBar | null = null;

  onStart(context: {
    env?: string;
    bucket: string;
    basePrefix: string;
    pathPrefix?: string;
    localDir: string;
    cdnBaseUrl?: string;
  }): void {
    // const { cdnBaseUrl } = context;
    // if (cdnBaseUrl) {
    //   console.log(`  CDN 根地址: ${cdnBaseUrl}`);
    // }
  }

  onProgress(current: number, total: number): void {
    if (this.progressBar === null) {
      this.progressBar = new SingleBar(
        {
          format: '  上传进度 |{bar}| {percentage}% | {value}/{total} 文件',
          barCompleteChar: '\u2588',
          barIncompleteChar: '\u2591',
          hideCursor: true,
        },
        Presets.shades_classic,
      );
      this.progressBar.start(total, 0);
    }
    this.progressBar.update(current);
    if (current >= total) {
      this.progressBar.stop();
      this.progressBar = null;
    }
  }

  onFileResult(_result: UploadFileResult): void {}

  onComplete(summary: UploadSummary): void {
    const { total, success, failed, skipped, context } = summary;
    console.log(chalk.bold.cyan('\n  ─────────── 上传完成 ───────────'));
    if (context) {
      console.log(chalk.bold('  前缀 / 配置（便于查验）'));
      console.log(`    bucket:     ${context.bucket}`);
      console.log(`    basePrefix: ${context.basePrefix}`);
      if (context.pathPrefix !== undefined && context.pathPrefix !== '') {
        console.log(`    pathPrefix: ${context.pathPrefix}`);
      }
      console.log(`    localDir:   ${context.localDir}`);
      if (context.cdnBaseUrl) {
        console.log(`    cdnBaseUrl: ${context.cdnBaseUrl}`);
      }
      console.log('');
    }
    console.log(
      `  总数: ${chalk.bold(total)}    ` +
        chalk.green(`成功: ${success.length}`) +
        `    ` +
        chalk.gray(`跳过: ${skipped.length}`) +
        `    ` +
        (failed.length > 0 ? chalk.red.bold(`失败: ${failed.length}`) : `失败: ${failed.length}`),
    );
    if (success.length > 0) {
      console.log(chalk.green(`\n  ✓ 成功 (${success.length})`));
      success.forEach((key) => console.log(chalk.green(`    ${key}`)));
    }
    if (skipped.length > 0) {
      console.log(chalk.gray(`\n  - 跳过 (${skipped.length})`));
      skipped.forEach((key) => console.log(chalk.gray(`    ${key}`)));
    }
    if (failed.length > 0) {
      console.log(chalk.red(`\n  ✗ 失败 (${failed.length})`));
      failed.forEach((key) => console.log(chalk.red(`    ${key}`)));
    }
    console.log('');
  }
}

/** 脚本模式：进度与摘要打 stderr，便于调用方从 stdout 只拿到结果数组（如带 --hash 时） */
export class ScriptReporter implements Reporter {
  onStart(context: {
    env?: string;
    bucket: string;
    basePrefix: string;
    pathPrefix?: string;
    localDir: string;
    cdnBaseUrl?: string;
  }): void {}

  onProgress(current: number, total: number): void {
    process.stderr.write(`  上传进度 ${current}/${total} 文件\n`);
  }

  onFileResult(_result: UploadFileResult): void {}

  onComplete(summary: UploadSummary): void {
    const { total, success, failed, skipped } = summary;
    process.stderr.write(
      `\n  上传完成  总数: ${total}  成功: ${success.length}  跳过: ${skipped.length}  失败: ${failed.length}\n`,
    );
  }
}