package main

import (
    "flag"
    "fmt"
    "os"
    "net/http"
    "bufio"
    "strings"
)

func main() {
    helpFlag := flag.Bool("help", false, "Show help information")
    verboseFlag := flag.Bool("verbose", false, "Print more information")
    repoFlag := flag.String("repo", "https://neueland.iserlohn-fortress.net/smolbote/downloads", "Repository path")
    //dryRunFlag := flag.Bool("dry-run", false, "Dry run")

    flag.Parse()

    // help flag --> show usage and exit
    if *helpFlag {
        fmt.Println("Usage:")
        flag.PrintDefaults()
        os.Exit(0)
    }

    manifestPath := *repoFlag + "/windows-sha512.txt"
    repoPath := *repoFlag + "/windows/"

    if *verboseFlag {
        fmt.Println("repoFlag =", *repoFlag)
        fmt.Println("manifest =", manifestPath)
        fmt.Println("repoPath =", repoPath)
    }

    response, err := http.Get(manifestPath)
    if err != nil {
        panic(err)
    }
    defer response.Body.Close()

    scanner := bufio.NewScanner(response.Body)
    for scanner.Scan() {
        s := strings.Split(scanner.Text(), "  ")

        filepath := s[1]
        checksum := s[0]

        state, err := checkFile(filepath, checksum)
        if err != nil {
            panic(err)
        }

        if(state) {
            fmt.Printf("[%s] passed\n", filepath)
        } else {
            fmt.Printf("[%s] missing or mismatching\n", filepath)
            downloadFile(filepath, repoPath + filepath)
        }
    }


}