/**
 * Vivado 配置管理
 * 功能：读取和验证 Vivado 配置
 * 依赖：vscode
 */

import * as vscode from 'vscode';
import * as fs from 'fs';
import * as path from 'path';

export interface VivadoConfig {
  enabled: boolean;
  executablePath: string;
  workingDir: string;
}

/**
 * 获取 Vivado 配置
 */
export function getVivadoConfig(): VivadoConfig | null {
  // 优先读取项目配置
  const workspaceFolder = vscode.workspace.workspaceFolders?.[0];
  if (workspaceFolder) {
    const projectConfigPath = path.join(
      workspaceFolder.uri.fsPath,
      '.vscode',
      'ic-coder-vivado.json'
    );
    if (fs.existsSync(projectConfigPath)) {
      const content = fs.readFileSync(projectConfigPath, 'utf-8');
      return JSON.parse(content).vivado;
    }
  }

  // 读取全局配置
  const config = vscode.workspace.getConfiguration('ic-coder');
  const vivadoConfig = config.get<VivadoConfig>('vivado');

  if (vivadoConfig) {
    return vivadoConfig;
  }

  // 自动检测 Vivado
  return autoDetectVivado();
}

/**
 * 验证配置
 */
export function validateConfig(config: VivadoConfig): string | null {
  if (!config.enabled) {
    return 'Vivado 未启用';
  }
  if (!fs.existsSync(config.executablePath)) {
    return `Vivado 可执行文件不存在: ${config.executablePath}`;
  }
  return null;
}

/**
 * 解析工作目录
 */
export function resolveWorkingDir(workingDir: string): string {
  const workspaceFolder = vscode.workspace.workspaceFolders?.[0];
  if (workspaceFolder) {
    return workingDir.replace('${workspaceFolder}', workspaceFolder.uri.fsPath);
  }
  return workingDir;
}

/**
 * 自动检测 Vivado
 */
function autoDetectVivado(): VivadoConfig | null {
  const drives = ['C', 'D', 'E', 'F', 'G'];

  for (const drive of drives) {
    const vivadoDir = `${drive}:\\Xilinx\\Vivado`;
    if (!fs.existsSync(vivadoDir)) {
      continue;
    }

    // 读取所有版本目录
    const versions = fs.readdirSync(vivadoDir)
      .filter(v => fs.statSync(path.join(vivadoDir, v)).isDirectory())
      .sort()
      .reverse(); // 最新版本在前

    for (const version of versions) {
      const p = path.join(vivadoDir, version, 'bin', 'vivado.bat');
      if (fs.existsSync(p)) {
        const workspaceFolder = vscode.workspace.workspaceFolders?.[0];
        return {
          enabled: true,
          executablePath: p,
          workingDir: workspaceFolder
            ? path.join(workspaceFolder.uri.fsPath, 'vivado_projects')
            : `${drive}:\\vivado_projects`
        };
      }
    }
  }

  return null;
}