using System.Text;
using TinyTUI.Stdout;

namespace TinyTUI.Tests.TestInfrastructure;

/// <summary>
/// 捕获渲染器写出的终端序列并提供可模拟的窗口尺寸
/// </summary>
internal sealed class VirtualTerminalOutput(int columns = 80, int rows = 24) : ITerminalOutput
{
    private readonly List<string> _writes = [];

    /// <summary>
    /// 获取当前模拟终端尺寸
    /// </summary>
    public TerminalSize Size { get; private set; } = new(columns, rows);

    /// <summary>
    /// 获取完整输出缓冲
    /// </summary>
    public StringBuilder Buffer { get; } = new();

    /// <summary>
    /// 获取每一次写入的原始片段
    /// </summary>
    public IReadOnlyList<string> Writes => _writes;

    /// <summary>
    /// 调整模拟终端尺寸
    /// </summary>
    public void Resize(int columns, int rows) => Size = new TerminalSize(columns, rows);

    /// <summary>
    /// 清空已捕获的输出
    /// </summary>
    public void ClearWrites()
    {
        _writes.Clear();
        Buffer.Clear();
    }

    /// <summary>
    /// 判断完整输出缓冲是否包含指定序列
    /// </summary>
    public bool Contains(string value) => Buffer.ToString().Contains(value, StringComparison.Ordinal);

    /// <inheritdoc />
    public void Write(string value)
    {
        _writes.Add(value);
        Buffer.Append(value);
    }

    /// <inheritdoc />
    public void Flush()
    {
    }

    /// <inheritdoc />
    public void ClearScreen() => Write("\e[2J\e[H");

    /// <inheritdoc />
    public void HideCursor() => Write("\e[?25l");

    /// <inheritdoc />
    public void ShowCursor() => Write("\e[?25h");

    /// <inheritdoc />
    public void MoveCursorTo(int row, int column) => Write($"\e[{row};{column}H");
}