package filetool

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

func TestReadDeniedOutsideAllowedDir(t *testing.T) {
	allowed := t.TempDir()
	tool := New([]string{allowed}, 4000, nil)
	_, err := tool.Call(context.Background(), "read ../outside.txt")
	if err == nil {
		t.Fatal("expected path denied error")
	}
}

func TestWriteAndReadInsideAllowedDir(t *testing.T) {
	allowed := t.TempDir()
	tool := New([]string{allowed}, 4000, nil)
	path := filepath.Join(allowed, "a.txt")

	_, err := tool.Call(context.Background(), "write "+path+"\nhello")
	if err != nil {
		t.Fatalf("write error: %v", err)
	}
	out, err := tool.Call(context.Background(), "read "+path)
	if err != nil {
		t.Fatalf("read error: %v", err)
	}
	if out != "hello" {
		t.Fatalf("unexpected read output: %q", out)
	}
}

func TestReadDirectoryReturnsStructuredError(t *testing.T) {
	allowed := t.TempDir()
	tool := New([]string{allowed}, 4000, nil)

	_, err := tool.Call(context.Background(), "read "+allowed)
	if err == nil {
		t.Fatal("expected directory read error")
	}
	if !strings.Contains(err.Error(), "PATH_IS_DIRECTORY") {
		t.Fatalf("expected PATH_IS_DIRECTORY, got: %v", err)
	}
}

func TestListDirectory(t *testing.T) {
	allowed := t.TempDir()
	tool := New([]string{allowed}, 4000, nil)
	path := filepath.Join(allowed, "x.txt")

	_, err := tool.Call(context.Background(), "write "+path+"\nhello")
	if err != nil {
		t.Fatalf("write error: %v", err)
	}
	out, err := tool.Call(context.Background(), "list "+allowed)
	if err != nil {
		t.Fatalf("list error: %v", err)
	}
	if !strings.Contains(out, "x.txt") {
		t.Fatalf("expected x.txt in list output, got: %q", out)
	}
}