<?php

namespace App\Console\Commands;

use App\Services\EnvService;
use Illuminate\Console\Command;

class EnvCommand extends Command
{
    protected $signature = 'env:manage
                            {action : 操作类型 (list|environments|apply|save|import|delete)}
                            {--project= : 项目名称}
                            {--environment= : 环境名称}
                            {--content= : 环境文件内容}';

    protected $description = '环境文件管理工具';

    private EnvService $envManager;

    public function __construct(EnvService $envManager)
    {
        parent::__construct();
        $this->envManager = $envManager;
    }

    public function handle(): int
    {
        $action = $this->argument('action');

        try {
            switch ($action) {
                case 'list':
                    return $this->listProjects();
                case 'environments':
                    return $this->listEnvironments();
                case 'apply':
                    return $this->applyEnvironment();
                case 'save':
                    return $this->saveEnvironment();
                case 'import':
                    return $this->importEnvironment();
                case 'delete':
                    return $this->deleteEnvironment();
                default:
                    $this->error("未知操作: {$action}");
                    $this->showUsage();
                    return 1;
            }
        } catch (\Exception $e) {
            $this->error("错误: " . $e->getMessage());
            return 1;
        }
    }

    /**
     * 列出所有项目
     */
    private function listProjects(): int
    {
        $projects = $this->envManager->getProjects();

        if (empty($projects)) {
            $this->info('没有找到任何项目');
            return 0;
        }

        $this->info('项目列表:');
        $this->table(
            ['项目名称', '路径', '有.env文件', '环境数量'],
            array_map(function ($project) {
                return [
                    $project['name'],
                    $project['path'],
                    $project['has_env'] ? '是' : '否',
                    count($project['envs'])
                ];
            }, $projects)
        );

        return 0;
    }

    /**
     * 列出项目的环境配置
     */
    private function listEnvironments(): int
    {
        $project = $this->option('project');
        
        if (!$project) {
            $this->error('请指定项目名称: --project=项目名');
            return 1;
        }

        $environments = $this->envManager->getProjectEnvs($project);

        if (empty($environments)) {
            $this->info("项目 {$project} 没有环境配置文件");
            return 0;
        }

        $this->info("项目 {$project} 的环境配置:");
        $this->table(
            ['环境名称', '文件大小', '修改时间'],
            array_map(function ($env) {
                return [
                    $env['name'],
                    $this->formatBytes($env['size']),
                    $env['modified_at']
                ];
            }, $environments)
        );

        return 0;
    }

    /**
     * 应用环境配置
     */
    private function applyEnvironment(): int
    {
        $project = $this->option('project');
        $environment = $this->option('environment');

        if (!$project || !$environment) {
            $this->error('请指定项目名称和环境名称: --project=项目名 --environment=环境名');
            return 1;
        }

        if ($this->confirm("确定要将 {$environment} 环境应用到项目 {$project} 吗？")) {
            $success = $this->envManager->applyEnv($project, $environment);
            
            if ($success) {
                $this->info("成功将 {$environment} 环境应用到项目 {$project}");
                return 0;
            } else {
                $this->error("应用环境配置失败");
                return 1;
            }
        }

        $this->info('操作已取消');
        return 0;
    }

    /**
     * 保存环境配置
     */
    private function saveEnvironment(): int
    {
        $project = $this->option('project');
        $environment = $this->option('environment');
        $content = $this->option('content');

        if (!$project || !$environment) {
            $this->error('请指定项目名称和环境名称: --project=项目名 --environment=环境名');
            return 1;
        }

        if (!$content) {
            $this->info('请输入环境配置内容 (输入完成后按 Ctrl+D):');
            $content = '';
            while (($line = fgets(STDIN)) !== false) {
                $content .= $line;
            }
        }

        if (empty(trim($content))) {
            $this->error('环境配置内容不能为空');
            return 1;
        }

        $success = $this->envManager->saveEnv($project, $environment, $content);
        
        if ($success) {
            $this->info("成功保存环境配置 {$project}/{$environment}");
            return 0;
        } else {
            $this->error("保存环境配置失败");
            return 1;
        }
    }

    /**
     * 从项目导入环境配置
     */
    private function importEnvironment(): int
    {
        $project = $this->option('project');
        $environment = $this->option('environment');

        if (!$project || !$environment) {
            $this->error('请指定项目名称和环境名称: --project=项目名 --environment=环境名');
            return 1;
        }

        $success = $this->envManager->importFromProject($project, $environment);
        
        if ($success) {
            $this->info("成功从项目 {$project} 导入环境配置为 {$environment}");
            return 0;
        } else {
            $this->error("导入环境配置失败");
            return 1;
        }
    }

    /**
     * 删除环境配置
     */
    private function deleteEnvironment(): int
    {
        $project = $this->option('project');
        $environment = $this->option('environment');

        if (!$project || !$environment) {
            $this->error('请指定项目名称和环境名称: --project=项目名 --environment=环境名');
            return 1;
        }

        if ($this->confirm("确定要删除环境配置 {$project}/{$environment} 吗？")) {
            $success = $this->envManager->deleteEnv($project, $environment);
            
            if ($success) {
                $this->info("成功删除环境配置 {$project}/{$environment}");
                return 0;
            } else {
                $this->error("删除环境配置失败");
                return 1;
            }
        }

        $this->info('操作已取消');
        return 0;
    }

    /**
     * 显示使用说明
     */
    private function showUsage(): void
    {
        $this->info('使用说明:');
        $this->line('  php artisan env:manage list                                    # 列出所有项目');
        $this->line('  php artisan env:manage environments --project=项目名           # 列出项目环境');
        $this->line('  php artisan env:manage apply --project=项目名 --environment=环境名  # 应用环境');
        $this->line('  php artisan env:manage save --project=项目名 --environment=环境名   # 保存环境');
        $this->line('  php artisan env:manage import --project=项目名 --environment=环境名 # 导入环境');
        $this->line('  php artisan env:manage delete --project=项目名 --environment=环境名 # 删除环境');
    }

    /**
     * 格式化字节大小
     */
    private function formatBytes(int $bytes): string
    {
        $units = ['B', 'KB', 'MB', 'GB'];
        $bytes = max($bytes, 0);
        $pow = floor(($bytes ? log($bytes) : 0) / log(1024));
        $pow = min($pow, count($units) - 1);
        
        $bytes /= pow(1024, $pow);
        
        return round($bytes, 2) . ' ' . $units[$pow];
    }
}