using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using Newtonsoft.Json.Linq;

namespace RudderSdk.Core;

/// <summary>
/// A scenario quest node. Report objective progress; the server auto-completes
/// the node once every objective is satisfied.
/// </summary>
public sealed class QuestEffect
{
    private readonly EffectHandle _handle;

    internal QuestEffect(EffectHandle handle) => _handle = handle;

    /// <summary>Run id.</summary>
    public string RunId => _handle.RunId;

    /// <summary>Scenario id.</summary>
    public string ScenarioSlug => _handle.ScenarioSlug;

    /// <summary>Node id.</summary>
    public string NodeId => _handle.NodeId;

    /// <summary>Quest name from the node data.</summary>
    public string Name => _handle.Get("name", string.Empty);

    /// <summary>Objective definitions from the node data.</summary>
    public IReadOnlyList<JObject> Objectives
    {
        get
        {
            if (_handle.Data["objectives"] is not JArray array)
                return Array.Empty<JObject>();

            var list = new List<JObject>(array.Count);
            foreach (var item in array)
            {
                if (item is JObject obj)
                    list.Add(obj);
            }

            return list;
        }
    }

    /// <summary>Node data payload.</summary>
    public JObject Data => _handle.Data;

    /// <summary>Reads a typed value from the node data.</summary>
    public T Get<T>(string key, T defaultValue = default!) => _handle.Get(key, defaultValue);

    /// <summary>Reports progress toward an objective via <c>POST /sdk/v1/scenarios/counter</c>.</summary>
    public Task ReportProgressAsync(string objectiveId, long amount = 1, CancellationToken cancellationToken = default)
        => _handle.ReportProgressAsync(objectiveId, amount, cancellationToken);

    /// <summary>Reports progress toward an objective (fire-and-forget).</summary>
    public void ReportProgress(string objectiveId, long amount = 1) => _handle.ReportProgress(objectiveId, amount);
}