using NUnit.Framework;
using System.Text.Json;
using SVSim.EmulatedEntrypoint.Models.Dtos.Guild;

namespace SVSim.UnitTests.Wire;

[TestFixture]
public class GuildWireShape
{
    private static readonly JsonSerializerOptions Opts = new()
    {
        PropertyNamingPolicy = JsonNamingPolicy.SnakeCaseLower,
        DefaultIgnoreCondition = System.Text.Json.Serialization.JsonIgnoreCondition.WhenWritingNull,
    };

    [Test]
    public void EmblemList_serializes_as_array_of_objects_with_emblem_id()
    {
        // GuildEmblemListTask.Parse() reads jsonData[i]["emblem_id"].ToLong()
        // → wire must be an array of objects, each with an "emblem_id" string field.
        var resp = new GuildEmblemListResponse
        {
            EmblemList = new() { new GuildEmblemEntry { EmblemId = 100_000_001L }, new GuildEmblemEntry { EmblemId = 100_000_002L } }
        };
        var json = JsonSerializer.Serialize(resp, Opts);
        using var doc = JsonDocument.Parse(json);
        var arr = doc.RootElement.GetProperty("guild_emblem_list");

        Assert.That(arr.ValueKind, Is.EqualTo(JsonValueKind.Array));
        Assert.That(arr.GetArrayLength(), Is.EqualTo(2));

        var first = arr[0];
        Assert.That(first.ValueKind, Is.EqualTo(JsonValueKind.Object));
        Assert.That(first.GetProperty("emblem_id").ValueKind, Is.EqualTo(JsonValueKind.String));
        Assert.That(first.GetProperty("emblem_id").GetString(), Is.EqualTo("100000001"));
    }

    [Test]
    public void GuildInfo_non_joined_serializes_to_prod_shape()
    {
        var resp = new GuildInfoResponse
        {
            MaxMemberNum = 30,
            MaxSubLeaderNum = 2,
            GuildStatus = 0,
            UsableStampList = Enumerable.Range(100001, 20).Select(i => i.ToString()).ToList(),
        };
        var json = JsonSerializer.Serialize(resp, Opts);
        using var doc = JsonDocument.Parse(json);
        var root = doc.RootElement;

        Assert.That(root.GetProperty("max_member_num").GetString(), Is.EqualTo("30"));
        Assert.That(root.GetProperty("max_sub_leader_num").GetString(), Is.EqualTo("2"));
        Assert.That(root.GetProperty("guild_status").GetString(), Is.EqualTo("0"));
        Assert.That(root.GetProperty("usable_stamp_list").EnumerateArray().Select(e => e.GetString()).First(), Is.EqualTo("100001"));

        // The four nullable fields MUST NOT appear when null:
        Assert.That(root.TryGetProperty("guild", out _), Is.False);
        Assert.That(root.TryGetProperty("join_request_count", out _), Is.False);
        Assert.That(root.TryGetProperty("invite_count", out _), Is.False);
    }
}