package common

import (
	"bytes"
	"context"
	"io/ioutil"
	"os"
	"path"
	"testing"

	"github.com/hashicorp/packer/helper/multistep"
	"github.com/hashicorp/packer/packer"
)

func TestStepCreateCD_Impl(t *testing.T) {
	var raw interface{}
	raw = new(StepCreateCD)
	if _, ok := raw.(multistep.Step); !ok {
		t.Fatalf("StepCreateCD should be a step")
	}
}

func testStepCreateCDState(t *testing.T) multistep.StateBag {
	state := new(multistep.BasicStateBag)
	state.Put("ui", &packer.BasicUi{
		Reader: new(bytes.Buffer),
		Writer: new(bytes.Buffer),
	})
	return state
}

func TestStepCreateCD(t *testing.T) {
	if os.Getenv("PACKER_ACC") == "" {
		t.Skip("This test is only run with PACKER_ACC=1 due to the requirement of access to the disk management binaries.")
	}
	state := testStepCreateCDState(t)
	step := new(StepCreateCD)

	dir, err := ioutil.TempDir("", "packer")
	if err != nil {
		t.Fatalf("err: %s", err)
	}
	defer os.RemoveAll(dir)

	files := make([]string, 3)

	tempFileNames := []string{"test_cd_roms.tmp", "test cd files.tmp",
		"Test-Test-Test5.tmp"}
	for i, fname := range tempFileNames {
		files[i] = path.Join(dir, fname)

		_, err := os.Create(files[i])
		if err != nil {
			t.Fatalf("err: %s", err)
		}
	}

	step.Files = files
	action := step.Run(context.Background(), state)

	if err, ok := state.GetOk("error"); ok {
		t.Fatalf("state should be ok for %v: %s", step.Files, err)
	}

	if action != multistep.ActionContinue {
		t.Fatalf("bad action: %#v for %v", action, step.Files)
	}

	CD_path := state.Get("cd_path").(string)

	if _, err := os.Stat(CD_path); err != nil {
		t.Fatalf("file not found: %s for %v", CD_path, step.Files)
	}

	if len(step.filesAdded) != 3 {
		t.Fatalf("expected 3 files, found %d for %v", len(step.filesAdded), step.Files)
	}

	step.Cleanup(state)

	if _, err := os.Stat(CD_path); err == nil {
		t.Fatalf("file found: %s for %v", CD_path, step.Files)
	}
}

func TestStepCreateCD_missing(t *testing.T) {
	if os.Getenv("PACKER_ACC") == "" {
		t.Skip("This test is only run with PACKER_ACC=1 due to the requirement of access to the disk management binaries.")
	}
	state := testStepCreateCDState(t)
	step := new(StepCreateCD)

	dir, err := ioutil.TempDir("", "packer")
	if err != nil {
		t.Fatalf("err: %s", err)
	}
	defer os.RemoveAll(dir)

	expected := 0

	step.Files = []string{"missing file.tmp"}
	if action := step.Run(context.Background(), state); action != multistep.ActionHalt {
		t.Fatalf("bad action: %#v for %v", action, step.Files)
	}

	if _, ok := state.GetOk("error"); !ok {
		t.Fatalf("state should not be ok for %v", step.Files)
	}

	CD_path := state.Get("cd_path")

	if CD_path != nil {
		t.Fatalf("CD_path is not nil for %v", step.Files)
	}

	if len(step.filesAdded) != expected {
		t.Fatalf("expected %d, found %d for %v", expected, len(step.filesAdded), step.Files)
	}
}