package platform

import (
	"context"
	"os"
	"path/filepath"
	"testing"
)

type gitFakeRunner struct {
	calls [][]string
	err   error
}

func (f *gitFakeRunner) Run(_ context.Context, name string, args ...string) error {
	f.calls = append(f.calls, append([]string{name}, args...))
	return f.err
}
func (f *gitFakeRunner) Output(_ context.Context, name string, args ...string) ([]byte, error) {
	return nil, nil
}

func TestGitEnsureRepoClonesWhenMissing(t *testing.T) {
	r := &gitFakeRunner{}
	g := GitClient{Runner: r}
	dest := filepath.Join(t.TempDir(), "repo")
	if err := g.EnsureRepo(context.Background(), "https://x/y.git", dest); err != nil {
		t.Fatal(err)
	}
	if len(r.calls) != 1 {
		t.Fatalf("want 1 call, got %d: %v", len(r.calls), r.calls)
	}
	got := r.calls[0]
	want := []string{"git", "clone", "--depth=1", "https://x/y.git", dest}
	for i := range want {
		if i >= len(got) || got[i] != want[i] {
			t.Fatalf("call = %v, want %v", got, want)
		}
	}
}

func TestGitEnsureRepoSkipsWhenPresent(t *testing.T) {
	dest := t.TempDir()
	if err := os.MkdirAll(filepath.Join(dest, ".git"), 0o755); err != nil {
		t.Fatal(err)
	}
	r := &gitFakeRunner{}
	g := GitClient{Runner: r}
	if err := g.EnsureRepo(context.Background(), "https://x/y.git", dest); err != nil {
		t.Fatal(err)
	}
	if len(r.calls) != 0 {
		t.Fatalf("expected no calls, got %v", r.calls)
	}
}