<?php

namespace App\Services;

use Illuminate\Support\Facades\Log;
use Symfony\Component\Process\Exception\ProcessFailedException;
use Symfony\Component\Process\Process;

class CodeAnalysisService
{
    public const TOOL_CLAUDE = 'claude';
    public const TOOL_CODEX = 'codex';

    private int $timeout = 300;

    public function __construct(
        private readonly CodeContextService $codeContextService,
        private readonly ConfigService $configService
    ) {}

    /**
     * 使用配置的工具在项目中分析日志问题
     *
     * @param string $appName 应用名称
     * @param string $logsContent 日志内容
     * @param string|null $aiSummary AI 初步分析摘要
     * @return array 分析结果
     */
    public function analyze(string $appName, string $logsContent, ?string $aiSummary): array
    {
        $repoPath = $this->codeContextService->getRepoPath($appName);

        if (!$repoPath) {
            return [
                'success' => false,
                'error' => "未配置项目路径: {$appName}",
            ];
        }

        $tool = $this->getConfiguredTool();

        try {
            $prompt = $this->buildPrompt($logsContent, $aiSummary);
            $output = $this->runTool($tool, $repoPath, $prompt);

            return [
                'success' => true,
                'output' => $output,
                'repo_path' => $repoPath,
                'tool' => $tool,
            ];
        } catch (ProcessFailedException $e) {
            Log::error("{$tool} execution failed", [
                'app_name' => $appName,
                'repo_path' => $repoPath,
                'tool' => $tool,
                'error' => $e->getMessage(),
            ]);

            return [
                'success' => false,
                'error' => "{$tool} 执行失败: " . $e->getProcess()->getErrorOutput(),
                'tool' => $tool,
            ];
        } catch (\Exception $e) {
            Log::error("Code analysis failed", [
                'app_name' => $appName,
                'repo_path' => $repoPath,
                'tool' => $tool,
                'error' => $e->getMessage(),
            ]);

            return [
                'success' => false,
                'error' => $e->getMessage(),
                'tool' => $tool,
            ];
        }
    }

    /**
     * 获取配置的分析工具
     */
    public function getConfiguredTool(): string
    {
        $tool = $this->configService->get('log_analysis.code_analysis_tool', self::TOOL_CLAUDE);

        if (!in_array($tool, [self::TOOL_CLAUDE, self::TOOL_CODEX])) {
            return self::TOOL_CLAUDE;
        }

        return $tool;
    }

    /**
     * 设置分析工具
     */
    public function setTool(string $tool): void
    {
        if (!in_array($tool, [self::TOOL_CLAUDE, self::TOOL_CODEX])) {
            throw new \InvalidArgumentException("不支持的工具: {$tool}");
        }

        $this->configService->set(
            'log_analysis.code_analysis_tool',
            $tool,
            '代码分析工具 (claude/codex)'
        );
    }

    /**
     * 获取可用的工具列表
     */
    public function getAvailableTools(): array
    {
        return [
            self::TOOL_CLAUDE => [
                'name' => 'Claude CLI',
                'description' => 'Anthropic Claude 命令行工具',
            ],
            self::TOOL_CODEX => [
                'name' => 'Codex CLI',
                'description' => 'OpenAI Codex 命令行工具',
            ],
        ];
    }

    /**
     * 构建提示词
     */
    private function buildPrompt(string $logsContent, ?string $aiSummary): string
    {
        $prompt = "分析以下错误日志，在代码库中排查根本原因并给出具体优化方案：\n\n";
        $prompt .= "=== 日志内容 ===\n{$logsContent}\n\n";

        if ($aiSummary) {
            $prompt .= "=== AI 初步分析 ===\n{$aiSummary}\n\n";
        }

        $prompt .= "请：\n";
        $prompt .= "1. 定位相关代码文件\n";
        $prompt .= "2. 分析根本原因\n";
        $prompt .= "3. 给出具体修复方案\n";

        return $prompt;
    }

    /**
     * 执行分析工具
     */
    private function runTool(string $tool, string $workingDirectory, string $prompt): string
    {
        return match ($tool) {
            self::TOOL_CODEX => $this->runCodex($workingDirectory, $prompt),
            default => $this->runClaude($workingDirectory, $prompt),
        };
    }

    /**
     * 执行 Claude CLI 命令
     */
    private function runClaude(string $workingDirectory, string $prompt): string
    {
        $process = new Process(
            ['claude', '--print', $prompt],
            $workingDirectory
        );
        $process->setTimeout($this->timeout);
        $process->mustRun();

        return trim($process->getOutput());
    }

    /**
     * 执行 Codex CLI 命令
     */
    private function runCodex(string $workingDirectory, string $prompt): string
    {
        $process = new Process(
            ['codex', '--quiet', '--full-auto', $prompt],
            $workingDirectory
        );
        $process->setTimeout($this->timeout);
        $process->mustRun();

        return trim($process->getOutput());
    }

    /**
     * 设置超时时间
     */
    public function setTimeout(int $timeout): void
    {
        $this->timeout = $timeout;
    }
}