package cmd

import (
	"os"
	"testing"
)

const testDir string = "test_dir"
const testFile string = "test.adi"

func setupTestCase(t *testing.T) func(t *testing.T) {
	t.Log("setup test case")
	//create test directory
	os.Mkdir(testDir, os.FileMode(0522))
	//create test file
	f, _ := os.OpenFile(testFile, os.O_WRONLY|os.O_CREATE, 0666)
	defer f.Close()

	return func(t *testing.T) {
		t.Log("teardown test case")
		//delete test directory
		os.Remove(testDir)
		//detete test file
		os.Remove(testFile)
	}
}

func Test_buildOutputFilename(t *testing.T) {
	type args struct {
		output    string
		input     string
		overwrite bool
		extension string
	}
	tests := []struct {
		name               string
		args               args
		wantOutputFilename string
		wantWasOK          bool
	}{
		{
			"input file not provided",
			args{input: "", output: "xxx", overwrite: false, extension: ".adi"},
			"", false,
		},
		{
			"Output file does not exist",
			args{input: "a file", output: "output.adi", overwrite: false, extension: ".adi"},
			"output.adi", true,
		},
		{
			"Output name is a directory",
			args{input: "a file", output: testDir, overwrite: false, extension: ".adi"},
			"", false,
		},
		{
			"Output exist but no overwrite",
			args{input: "a file", output: testFile, overwrite: false, extension: ".adi"},
			"", false,
		},
		{
			"no output, input provided with extention",
			args{input: "/test/data/file.txt", output: "", overwrite: false, extension: ".adi"},
			"/test/data/file.adi", true,
		},
		{
			"no output, input provided without extention",
			args{input: "/test/data/file", output: "", overwrite: false, extension: ".adi"},
			"/test/data/file.adi", true,
		},
		{
			"no output, input provided, enfing with a point",
			args{input: "/test/data/file.", output: "", overwrite: false, extension: ".adi"},
			"/test/data/file.adi", true,
		},
	}

	teardownTestCase := setupTestCase(t)
	defer teardownTestCase(t)

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			gotOutputFilename, gotWasOK := buildOutputFilename(tt.args.output, tt.args.input, tt.args.overwrite, tt.args.extension)
			if gotOutputFilename != tt.wantOutputFilename {
				t.Errorf("buildOutputFilename() gotOutputFilename = %v, want %v", gotOutputFilename, tt.wantOutputFilename)
			}
			if gotWasOK != tt.wantWasOK {
				t.Errorf("buildOutputFilename() gotWasOK = %v, want %v", gotWasOK, tt.wantWasOK)
			}
		})
	}
}