using System.IO;
using System.Text.Json;

namespace AxCopilot.Services.Agent;

public sealed class EnterPlanModeTool : IAgentTool
{
    public string Name => "enter_plan_mode";
    public string Description => "Enable plan mode marker for current workspace.";

    public ToolParameterSchema Parameters => new()
    {
        Properties = new(),
        Required = []
    };

    public Task<ToolResult> ExecuteAsync(JsonElement args, AgentContext context, CancellationToken ct = default)
    {
        if (string.IsNullOrWhiteSpace(context.WorkFolder) || !Directory.Exists(context.WorkFolder))
            return Task.FromResult(ToolResult.Fail("valid WorkFolder is required."));
        var path = Path.Combine(context.WorkFolder, ".ax", "plan_mode.state");
        var dir = Path.GetDirectoryName(path);
        if (!string.IsNullOrWhiteSpace(dir) && !Directory.Exists(dir))
            Directory.CreateDirectory(dir);
        File.WriteAllText(path, "on", TextFileCodec.Utf8NoBom);
        return Task.FromResult(ToolResult.Ok("Plan mode enabled."));
    }
}