package main

import (
	"context"
	"flag"
	"fmt"
	"log"
	"os"

	"github.com/xlgmokha/mcp/pkg/gitlab"
)

func main() {
	var (
		gitlabURL = flag.String("gitlab-url", "https://gitlab.com", "GitLab instance URL")
		help      = flag.Bool("help", false, "Show help information")
	)
	flag.Parse()

	if *help {
		fmt.Printf(`GitLab MCP Server

This server provides access to GitLab APIs for issue management, project tracking,
and workflow automation designed for GitLab software engineers.

Usage: %s [options]

Options:
`, os.Args[0])
		flag.PrintDefaults()
		fmt.Print(`
Examples:
  # Use GITLAB_TOKEN environment variable (recommended)
  export-access-token && mcp-gitlab
  
  # Specify token directly
  mcp-gitlab --gitlab-token your_token_here
  
  # Use with self-hosted GitLab instance
  mcp-gitlab --gitlab-url https://gitlab.company.com

Tools:
  - gitlab_list_my_projects: List projects you have access to with activity info
  - gitlab_list_my_issues: Issues assigned/authored/mentioned, prioritized by activity
  - gitlab_get_issue_conversations: Full conversation threads with participants
  - gitlab_find_similar_issues: Cross-project similarity search using AI
  - gitlab_get_my_activity: Recent activity summary and triage assistance
  
Environment Variables:
  - GITLAB_TOKEN: Personal Access Token (use with export-access-token script)
  - GITLAB_URL: GitLab instance URL (default: https://gitlab.com)

Caching Features:
  - Automatic local caching in ~/.mcp/gitlab/ for faster responses
  - 5-minute TTL (configurable) with intelligent cache invalidation
  - Offline mode: returns cached data when network is unavailable
  - Reduces API calls and improves performance for repeated queries
  - Sharded file storage with statistics tracking

For GitLab software engineers: This server integrates with your existing
export-access-token workflow and provides AI-assisted organization of your
GitLab work across multiple projects. Local caching ensures fast responses
and offline capability for improved productivity.

For more information, visit: https://github.com/xlgmokha/mcp
`)
		return
	}

	token := os.Getenv("GITLAB_TOKEN")
	if token == "" {
		log.Fatal("GitLab token required. Set GITLAB_TOKEN environment variable.\n")
	}

	url := *gitlabURL
	if envURL := os.Getenv("GITLAB_URL"); envURL != "" {
		url = envURL
	}

	server, err := gitlab.New(url, token)
	if err != nil {
		log.Fatalf("Failed to create GitLab server: %v", err)
	}

	ctx := context.Background()
	if err := server.Run(ctx); err != nil {
		log.Fatalf("Server error: %v", err)
	}
}