using System.Net;
using System.Net.Http.Json;
using ChessCubing.App.Models;
using ChessCubing.App.Models.Stats;

namespace ChessCubing.App.Services;

public sealed class MatchStatsService(HttpClient httpClient)
{
    private readonly HttpClient _httpClient = httpClient;

    public async Task<bool> TryReportCompletedMatchAsync(MatchState? match, CancellationToken cancellationToken = default)
    {
        if (match is null || string.IsNullOrWhiteSpace(match.Result) || match.ResultRecordedUtc is not null)
        {
            return false;
        }

        if (string.IsNullOrWhiteSpace(match.WhiteSubject) && string.IsNullOrWhiteSpace(match.BlackSubject))
        {
            return false;
        }

        var request = BuildReport(match);

        try
        {
            var response = await _httpClient.PostAsJsonAsync("api/users/me/stats/matches", request, cancellationToken);
            if (response.StatusCode is HttpStatusCode.Unauthorized or HttpStatusCode.Forbidden)
            {
                return false;
            }

            if (!response.IsSuccessStatusCode)
            {
                return false;
            }

            match.ResultRecordedUtc = DateTime.UtcNow;
            return true;
        }
        catch
        {
            return false;
        }
    }

    private static ReportCompletedMatchRequest BuildReport(MatchState match)
        => new()
        {
            MatchId = string.IsNullOrWhiteSpace(match.MatchId) ? Guid.NewGuid().ToString("N") : match.MatchId,
            CollaborationSessionId = match.CollaborationSessionId,
            WhiteSubject = NormalizeOptional(match.WhiteSubject),
            WhiteName = MatchEngine.PlayerName(match, MatchEngine.ColorWhite),
            BlackSubject = NormalizeOptional(match.BlackSubject),
            BlackName = MatchEngine.PlayerName(match, MatchEngine.ColorBlack),
            Result = match.Result ?? string.Empty,
            Mode = match.Config.Mode,
            Preset = match.Config.Preset,
            MatchLabel = MatchEngine.SanitizeText(match.Config.MatchLabel),
            BlockNumber = Math.Max(1, match.BlockNumber),
            WhiteMoves = Math.Max(0, match.Moves.White),
            BlackMoves = Math.Max(0, match.Moves.Black),
            CubeRounds = match.Cube.History
                .Select(entry => new ReportCompletedCubeRound
                {
                    BlockNumber = Math.Max(1, entry.BlockNumber),
                    Number = entry.Number,
                    White = entry.White,
                    Black = entry.Black,
                })
                .ToArray(),
        };

    private static string? NormalizeOptional(string? value)
        => string.IsNullOrWhiteSpace(value) ? null : value.Trim();
}