package main

import(
  "log"
  "os"
  "io"
)

func cmdHead(config *configCollect) {
  rc := NewRepoCommits(config)

  rc.CollectDescs()
  log.Println("Repo contains", len(rc.CommitDesc), "commits")

  rc.CollectContent()
  rc.BuildGraph()
  log.Println("Repo has", len(rc.Root), "sources")
  if len(rc.Root) > 1 {
    for cn, _ := range rc.Root {
      log.Println("Commit "+cn.Id+"\n"+cn.Content.String()) 
    }
  }

  rc.FindLeafs()
  log.Println("Repo has", len(rc.Leafs), "sinks")

  rc.ChooseHead()
  log.Println("Proposing following HEAD:\n"+rc.Head.Content.String())
}


type LsWalker struct { }
func (lw* LsWalker) onDir(dn *DirNode) {
  log.Println(dn.String())
}
func (lw* LsWalker) onFile(fn *FileNode) {
  log.Println(fn.String())
}
func cmdLs(config *configCollect) {
  en := NewEntryNode(config)
  en.Walk(new(LsWalker))
}

func cmdInfo(config *configCollect) {
  en := NewEntryFileNode(config)
  en.Parse()
  log.Println(en.Elem.String())
}

func cmdCpFile(config *configCollect) {
  en := NewEntryFileNode(config)
  en.Parse()

  file, err := os.Create(config.Dest)
  if err != nil { log.Fatal(err) }
  written, err := io.Copy(file, en)
  if err != nil { log.Fatal(err) }
  if uint64(written) != en.Elem.FileSize {
    log.Fatal(written, "bytes written,", en.Elem.FileSize, "bytes expected")
  }
}

func cmdCpDir(config *configCollect) {

}