package prompts

import (
	"os"
	"path/filepath"
	"strings"
)

// ListAvailablePrompts returns a list of available language prompts.
// It scans both project-local and global prompt directories.
func ListAvailablePrompts() []string {
	var prompts []string

	// Check project-local prompts
	localDir := ".grokkit/prompts"
	if entries, err := os.ReadDir(localDir); err == nil {
		for _, entry := range entries {
			if !entry.IsDir() && strings.HasSuffix(entry.Name(), ".md") {
				name := strings.TrimSuffix(entry.Name(), ".md")
				prompts = append(prompts, name)
			}
		}
	}

	// Check global prompts
	home := os.Getenv("HOME")
	if home == "" {
		home = os.Getenv("USERPROFILE")
	}
	if home != "" {
		globalDir := filepath.Join(home, ".config", "grokkit", "prompts")
		if entries, err := os.ReadDir(globalDir); err == nil {
			for _, entry := range entries {
				if !entry.IsDir() && strings.HasSuffix(entry.Name(), ".md") {
					name := strings.TrimSuffix(entry.Name(), ".md")
					// Avoid duplicates
					found := false
					for _, p := range prompts {
						if p == name {
							found = true
							break
						}
					}
					if !found {
						prompts = append(prompts, name)
					}
				}
			}
		}
	}

	return prompts
}