using NUnit.Framework;
using System.Text.Json;
using SVSim.EmulatedEntrypoint.Models.Dtos.Common.Guild;
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"));
    }

    private static GuildDetailDto SampleDetail => new()
    {
        GuildId = 100_000_001,
        GuildName = "X",
        LeaderName = "L",
        LeaderViewerId = 7,
        Activity = 1,
        JoinCondition = 1,
        MemberNum = 1,
        GuildEmblemId = 100_000_000L,
        Description = "",
    };

    [Test]
    public void GuildUpdate_response_serializes_with_flat_guild_detail()
    {
        // GuildUpdateTask.Parse() reads data["guild"] as GuildDetailInfo directly — no "detail" wrapper.
        var resp = new GuildUpdateResponse { Guild = SampleDetail };
        var json = JsonSerializer.Serialize(resp, Opts);
        using var doc = JsonDocument.Parse(json);
        var guild = doc.RootElement.GetProperty("guild");

        // guild_id must be DIRECTLY under "guild"
        Assert.That(guild.TryGetProperty("guild_id", out var gid), Is.True, "guild_id must be directly under guild");
        Assert.That(gid.GetString(), Is.EqualTo("100000001"));

        // No nested "detail" wrapper
        Assert.That(guild.TryGetProperty("detail", out _), Is.False, "no detail wrapper for /guild/update");
    }

    [Test]
    public void GuildUpdateEmblem_response_serializes_with_nested_detail()
    {
        // GuildEmblemUpdateTask.Parse() reads data["guild"]["detail"] — wrapper is required.
        var resp = new GuildUpdateEmblemResponse
        {
            Guild = new GuildDetailSubTree { Detail = SampleDetail }
        };
        var json = JsonSerializer.Serialize(resp, Opts);
        using var doc = JsonDocument.Parse(json);
        var guildNode = doc.RootElement.GetProperty("guild");

        Assert.That(guildNode.TryGetProperty("detail", out var detail), Is.True, "detail wrapper must exist for /guild/update_emblem");
        Assert.That(detail.GetProperty("guild_id").GetString(), Is.EqualTo("100000001"));

        // guild_id must NOT be directly under "guild"
        Assert.That(guildNode.TryGetProperty("guild_id", out _), Is.False, "guild_id must be inside detail, not at guild level");
    }

    [Test]
    public void GuildSearchGuild_response_serializes_with_flat_list_entries()
    {
        var resp = new GuildSearchGuildResponse { List = new() {
            new GuildDetailDto { GuildId = 100_000_001, GuildName = "Alpha", LeaderName = "Lead", LeaderViewerId = 7, Activity = 1, JoinCondition = 1, MemberNum = 5, GuildEmblemId = 100000000, Description = "" }
        } };
        var json = JsonSerializer.Serialize(resp, Opts);
        using var doc = JsonDocument.Parse(json);
        var arr = doc.RootElement.GetProperty("list");
        Assert.That(arr.ValueKind, Is.EqualTo(JsonValueKind.Array));
        Assert.That(arr[0].GetProperty("guild_id").GetString(), Is.EqualTo("100000001"));
        Assert.That(arr[0].TryGetProperty("detail", out _), Is.False, "search list entries are flat, no detail wrapper");
    }

    [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);
    }
}