package vmware

import (
	"fmt"
	"github.com/mitchellh/multistep"
	"github.com/mitchellh/packer/packer"
	"io/ioutil"
	"log"
	"os"
	"strings"
)

// This step cleans up the VMX by removing or changing this prior to
// being ready for use.
//
// Uses:
//   ui     packer.Ui
//   vmx_path string
//
// Produces:
//   <nothing>
type stepCleanVMX struct{}

func (s stepCleanVMX) Run(state map[string]interface{}) multistep.StepAction {
	if _, ok := state["floppy_path"]; !ok {
		return multistep.ActionContinue
	}

	ui := state["ui"].(packer.Ui)
	vmxPath := state["vmx_path"].(string)

	vmxData, err := s.readVMX(vmxPath)
	if err != nil {
		state["error"] = fmt.Errorf("Error reading VMX: %s", err)
		return multistep.ActionHalt
	}

	// Delete the floppy0 entries so the floppy is no longer mounted
	ui.Say("Unmounting floppy from VMX...")
	for k, _ := range vmxData {
		if strings.HasPrefix(k, "floppy0.") {
			log.Printf("Deleting key: %s", k)
			delete(vmxData, k)
		}
	}
	vmxData["floppy0.present"] = "FALSE"

	// Rewrite the VMX
	if err := WriteVMX(vmxPath, vmxData); err != nil {
		state["error"] = fmt.Errorf("Error writing VMX: %s", err)
		return multistep.ActionHalt
	}

	return multistep.ActionContinue
}

func (stepCleanVMX) Cleanup(map[string]interface{}) {}

func (stepCleanVMX) readVMX(vmxPath string) (map[string]string, error) {
	vmxF, err := os.Open(vmxPath)
	if err != nil {
		return nil, err
	}
	defer vmxF.Close()

	vmxBytes, err := ioutil.ReadAll(vmxF)
	if err != nil {
		return nil, err
	}

	return ParseVMX(string(vmxBytes)), nil
}