package clipboard

import (
	"errors"
	"testing"

	"git.julianfamily.org/keepassgo/vault"
)

func TestServiceCopiesUsernamePasswordAndURL(t *testing.T) {
	t.Parallel()

	model := vault.Model{
		Entries: []vault.Entry{
			{
				ID:       "vault-console",
				Title:    "Vault Console",
				Username: "dannyocean",
				Password: "token-1",
				URL:      "https://vault.crew.example.invalid",
			},
		},
	}

	tests := []struct {
		name   string
		target Target
		want   string
	}{
		{name: "username", target: TargetUsername, want: "dannyocean"},
		{name: "password", target: TargetPassword, want: "token-1"},
		{name: "url", target: TargetURL, want: "https://vault.crew.example.invalid"},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			var writer memoryWriter
			service := Service{Writer: &writer}

			if err := service.Copy(model, "vault-console", tt.target); err != nil {
				t.Fatalf("Copy() error = %v", err)
			}

			if writer.content != tt.want {
				t.Fatalf("clipboard content = %q, want %q", writer.content, tt.want)
			}
		})
	}
}

func TestServiceRejectsUnknownEntryAndUnsupportedTarget(t *testing.T) {
	t.Parallel()

	var writer memoryWriter
	service := Service{Writer: &writer}

	err := service.Copy(vault.Model{}, "missing", TargetPassword)
	if !errors.Is(err, vault.ErrEntryNotFound) {
		t.Fatalf("Copy() missing entry error = %v, want ErrEntryNotFound", err)
	}

	model := vault.Model{
		Entries: []vault.Entry{{ID: "vault-console", Username: "dannyocean"}},
	}
	err = service.Copy(model, "vault-console", Target("unsupported"))
	if !errors.Is(err, ErrUnsupportedTarget) {
		t.Fatalf("Copy() unsupported target error = %v, want ErrUnsupportedTarget", err)
	}
}

func TestServiceSanitizesClipboardWriteErrors(t *testing.T) {
	t.Parallel()

	service := Service{Writer: failingWriter{err: errors.New("backend refused token-1")}}
	model := vault.Model{
		Entries: []vault.Entry{
			{ID: "vault-console", Password: "token-1"},
		},
	}

	err := service.Copy(model, "vault-console", TargetPassword)
	if !errors.Is(err, ErrWriteFailed) {
		t.Fatalf("Copy() write error = %v, want ErrWriteFailed", err)
	}
	if err.Error() != ErrWriteFailed.Error() {
		t.Fatalf("Copy() write error string = %q, want %q", err.Error(), ErrWriteFailed.Error())
	}
}

type memoryWriter struct {
	content string
}

func (w *memoryWriter) WriteText(text string) error {
	w.content = text
	return nil
}

type failingWriter struct {
	err error
}

func (w failingWriter) WriteText(string) error {
	return w.err
}