// Copyright 2016 The go-qemu Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package main

import (
	"bufio"
	"fmt"
	"os"
	"runtime"
	"strings"
)

func initDistro() string {
	switch runtime.GOOS {
	case "windows":
		return "windows"
	case "macos":
		return "macos"
	case "linux":
		// Detect the Linux distribution
		distro := detectDistro()
		if distro == "" {
			fmt.Println("Unable to detect Linux distribution.")
			distro = "fixme"
		}

		fmt.Printf("Detected distribution: %s\n", distro)
		return distro
	default:
		return runtime.GOOS
	}
}

// detectDistro returns the Linux distribution name (if possible)
func detectDistro() string {
	// Check if we're on Linux

	// Try to read /etc/os-release to determine the distro
	file, err := os.Open("/etc/os-release")
	if err != nil {
		return ""
	}
	defer file.Close()

	scanner := bufio.NewScanner(file)
	for scanner.Scan() {
		line := scanner.Text()
		if strings.HasPrefix(line, "ID=") {
			parts := strings.SplitN(line, "=", 2)
			if len(parts) == 2 {
				return strings.Trim(parts[1], `"`)
			}
		}
	}
	return ""
}