// registry.go - Tool discovery and shared types.
package metadata

import (
	"encoding/json"
	"os"
	"path/filepath"
	"strings"

	"ollie/toolsrv/protocol"
	"ollie/util"
)

// ToolsPath returns ~/.config/ollie/tools.
func ToolsPath() string {
	return util.CfgDir() + "/tools"
}

// DiscoverTools scans the tools directory for .meta files and returns
// metadata for all tools.
func DiscoverTools() []protocol.ToolInfo {
	dir := ToolsPath()
	entries, err := os.ReadDir(dir)
	if err != nil {
		return nil
	}
	var infos []protocol.ToolInfo
	for _, e := range entries {
		if e.IsDir() || !strings.HasSuffix(e.Name(), ".meta") {
			continue
		}
		name := strings.TrimSuffix(e.Name(), ".meta")
		data, err := os.ReadFile(filepath.Join(dir, e.Name()))
		if err != nil {
			continue
		}
		var m MetaFile
		if err := json.Unmarshal(data, &m); err != nil {
			continue
		}
		info := ToolInfoFromMeta(name, &m)
		if info.Name == "" {
			continue // no variant matched — tool unavailable on this host
		}
		infos = append(infos, info)
	}
	return infos
}