package cli

import (
	"bytes"
	"context"
	"fmt"
	"strings"
	"testing"

	"gitea.maximumdirect.net/eric/ReleaseKit/buildinfo"
)

func TestVersionCommandRunsWithoutApplicationSetup(t *testing.T) {
	t.Chdir(t.TempDir())
	var stdout, stderr bytes.Buffer
	if code := Run(context.Background(), []string{"version"}, &stdout, &stderr); code != 0 {
		t.Fatalf("exit=%d, stdout=%q, stderr=%q", code, stdout.String(), stderr.String())
	}
	if got, want := stdout.String(), fmt.Sprintf("audita %s\n", buildinfo.Version()); got != want {
		t.Fatalf("stdout=%q, want %q", got, want)
	}
	if got := stderr.String(); got != "" {
		t.Fatalf("stderr=%q, want empty", got)
	}
}

func TestVersionCommandHelp(t *testing.T) {
	for _, test := range []struct {
		name string
		args []string
		want string
	}{
		{name: "root help", args: []string{"--help"}, want: "version    Print the Audita version"},
		{name: "help version", args: []string{"help", "version"}, want: "audita version"},
		{name: "short flag", args: []string{"version", "-h"}, want: "audita version"},
		{name: "long flag", args: []string{"version", "--help"}, want: "audita version"},
		{name: "parser help", args: []string{"version", "--h"}, want: "audita version"},
		{name: "help short circuits", args: []string{"version", "-h", "--help", "extra"}, want: "audita version"},
	} {
		t.Run(test.name, func(t *testing.T) {
			var stdout, stderr bytes.Buffer
			if code := Run(context.Background(), test.args, &stdout, &stderr); code != 0 {
				t.Fatalf("exit=%d, stdout=%q, stderr=%q", code, stdout.String(), stderr.String())
			}
			if !strings.Contains(stdout.String(), test.want) {
				t.Fatalf("stdout=%q, want %q", stdout.String(), test.want)
			}
			if got := stderr.String(); got != "" {
				t.Fatalf("stderr=%q, want empty", got)
			}
		})
	}
}

func TestVersionCommandRejectsUnexpectedArguments(t *testing.T) {
	for _, args := range [][]string{
		{"version", "extra"},
		{"version", "--unknown"},
	} {
		t.Run(strings.Join(args, " "), func(t *testing.T) {
			var stdout, stderr bytes.Buffer
			if code := Run(context.Background(), args, &stdout, &stderr); code != 2 {
				t.Fatalf("exit=%d, stdout=%q, stderr=%q", code, stdout.String(), stderr.String())
			}
			if got := stdout.String(); got != "" {
				t.Fatalf("stdout=%q, want empty", got)
			}
			if got := stderr.String(); got == "" {
				t.Fatal("expected usage error on stderr")
			}
		})
	}
}