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

namespace AxCopilot.Services.Agent;

public sealed class CronListTool : IAgentTool
{
    public string Name => "cron_list";
    public string Description => "List local cron-like jobs.";

    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 jobs = CronStore.Load(context.WorkFolder)
            .OrderByDescending(j => j.CreatedAt)
            .ToList();
        if (jobs.Count == 0)
            return Task.FromResult(ToolResult.Ok("No cron jobs."));

        var sb = new StringBuilder();
        sb.AppendLine($"cron jobs: {jobs.Count}");
        foreach (var j in jobs)
            sb.AppendLine($"- {j.Id} | {j.Name} | {j.Schedule} | enabled={j.Enabled} | {j.Command}");
        return Task.FromResult(ToolResult.Ok(sb.ToString()));
    }
}