using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using RadicadeServer.DB;
using RadicadeServer.Extensions;
using RadicadeServer.API.Notifications;
using RadicadeServer.RecNet.Enums.Messages;
using RadicadeServer.RecNet.Enums.Moderation;
using RadicadeServer.RecNet.Messages;
using RadicadeServer.RecNet.Moderation;
using RadicadeServer.RecNet.Notifications;
using System.Text;
using System.Text.Json;
using System.Text.Json.Nodes;
using System.Text.Json.Serialization;
using RadicadeServer.RecNet.Responses;

namespace RadicadeServer.API.Moderation
{
	[Route("api/playerReputation")]
	public class ReputationAPI : Controller
	{
		RecDBContext db;
		public ReputationAPI(RecDBContext context)		{
			this.db = context;
		}

		[HttpGet("v1/{id}")]
		public IActionResult GetReputation(long id)
		{
			var reputation = db.Reputations.FirstOrDefault((x) => x.AccountId == id);
			reputation ??= new Reputation { AccountId = id };
			return Ok(CreateClientReputation(reputation.ForClient()));
		}

		[HttpPost("v1/bulk")]
		public IActionResult GetBulkReputation([FromForm] long[] ids)
		{
			var reputations = new List<ClientReputation>();
			foreach (var id in ids)
			{
				var reputation = db.Reputations.FirstOrDefault((x) => x.AccountId == id);
				reputation ??= new Reputation { AccountId = id };
				reputations.Add(CreateClientReputation(reputation.ForClient()));
			}
			return Ok(reputations);
		}

		[HttpGet("v2/bulk")]
		public IActionResult GetBulkReputationV2([FromQuery] long[] id)
		{
			var reputations = new List<ClientReputation>();
			foreach (var i in id)
			{
				var reputation = db.Reputations.FirstOrDefault((x) => x.AccountId == i);
				reputation ??= new Reputation { AccountId = i };
				reputations.Add(CreateClientReputation(reputation.ForClient()));
			}
			return Ok(reputations);
		}

		private static ClientReputation CreateClientReputation(Reputation reputation) => new()
		{
			Id = reputation.AccountId,
			AccountId = reputation.AccountId,




			IsCheerful = true,
			Noteriety = (float)reputation.Noteriety,
			SelectedCheer = reputation.SelectedCheer,



			CheerCredit = reputation.CheerCredit > 0 ? reputation.CheerCredit : 20,



			CheerGeneral = reputation.CheerGeneral,
			CheerHelpful = reputation.CheerHelpful,
			CheerCreative = reputation.CheerCreative,
			CheerGreatHost = reputation.CheerGreatHost,
			CheerSportsman = reputation.CheerSportsman
		};

		private sealed class ClientReputation
		{
			public long Id { get; set; }
			[JsonPropertyName("accountId")]
			public long AccountId { get; set; }
			public bool IsCheerful { get; set; }
			public float Noteriety { get; set; }
			public int SelectedCheer { get; set; }
			public int CheerCredit { get; set; }
			public int CheerGeneral { get; set; }
			public int CheerHelpful { get; set; }
			public int CheerCreative { get; set; }
			public int CheerGreatHost { get; set; }
			public int CheerSportsman { get; set; }
		}







		private static readonly CheerCategory[] AwardableCheers =
		{
			CheerCategory.General, CheerCategory.Helpful, CheerCategory.Sportsman,
			CheerCategory.GreatHost, CheerCategory.Creative
		};

		[HttpPost("~/api/PlayerCheer/v1/create")]
		[HttpPost("v1/cheer"), Authorize]
		public async Task<ActionResult<Success>> CheerPlayer()
		{
			var userId = User.GetUserId();
			if (userId == null) return Unauthorized();

			var request = await ReadRequestValuesAsync();
			var values = request.Values;
			var playerId = ReadLong(values, "playeridto", "playerid", "player", "targetplayerid", "accountid", "id");
			var category = ReadInt(values, "category", "cheercategory", "cheer", "value");

			if (playerId == null || category == null)
			{
				return BadRequest(Success.Error("No player or cheer category was given."));
			}

			if (playerId == userId) return BadRequest(Success.Error("You can't cheer yourself."));

			var cheer = (CheerCategory)category.Value;
			if (!AwardableCheers.Contains(cheer))
				return BadRequest(Success.Error($"Unknown cheer category {category.Value}."));

			var reputation = await db.Reputations.FirstOrDefaultAsync(x => x.AccountId == playerId);
			if (reputation == null)
			{


				reputation = new Reputation { AccountId = playerId.Value };
				await db.Reputations.AddAsync(reputation);
			}

			reputation.AddCheer(cheer);

			await db.SaveChangesAsync();





			await Notify.SendMessage(playerId.Value, new Message
			{
				FromPlayerId = userId.Value,
				Type = MessageType.PlayerCheer,
				Data = category.Value.ToString()
			});

			await Notify.SendAccountUpdate(playerId.Value);
			await SendReputationUpdate(playerId.Value, reputation);

			return Ok(Success.Ok);
		}

		private async Task<(Dictionary<string, string> Values, string Raw)> ReadRequestValuesAsync()
		{
			var values = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);

			foreach (var (key, value) in Request.RouteValues)
				if (value != null) values[key] = value.ToString() ?? string.Empty;

			foreach (var (key, value) in Request.Query)
				values[key] = value.ToString();

			Request.EnableBuffering();

			string raw;
			using (var reader = new StreamReader(Request.Body, Encoding.UTF8, detectEncodingFromByteOrderMarks: false, leaveOpen: true))
				raw = (await reader.ReadToEndAsync()).Trim();

			Request.Body.Position = 0;

			if (raw.Length == 0) return (values, raw);

			if (raw.StartsWith('{'))
			{
				try
				{
					if (JsonNode.Parse(raw) is JsonObject json)
					{
						foreach (var (key, value) in json)
							values[key] = value?.ToString() ?? string.Empty;
						return (values, raw);
					}
				}
				catch (JsonException) {  }
			}

			if (raw.Contains('='))
			{
				foreach (var pair in raw.Split('&', StringSplitOptions.RemoveEmptyEntries))
				{
					var parts = pair.Split('=', 2);
					if (parts.Length == 2)
						values[parts[0]] = Uri.UnescapeDataString(parts[1]);
				}
				return (values, raw);
			}

			values["category"] = raw;
			return (values, raw);
		}

		private static int? ReadInt(Dictionary<string, string> values, params string[] keys)
		{
			foreach (var key in keys)
				if (values.TryGetValue(key, out var raw) && int.TryParse(raw, out var parsed))
					return parsed;
			return null;
		}

		private static long? ReadLong(Dictionary<string, string> values, params string[] keys)
		{
			foreach (var key in keys)
				if (values.TryGetValue(key, out var raw) && long.TryParse(raw, out var parsed))
					return parsed;
			return null;
		}






		[HttpPost("~/api/PlayerCheer/v1/SetSelectedCheer")]
		[HttpPost("v1/selectedCheer"), HttpPost("v1/selectCheer"),
			HttpPost("v1/selectedCheer/{category:int}"), HttpPut("v1/selectedCheer"), Authorize]
		public async Task<ActionResult<Success>> SetSelectedCheer()
		{
			var userId = User.GetUserId();
			if (userId == null) return Unauthorized();

			var request = await ReadRequestValuesAsync();
			var category = ReadInt(request.Values, "category", "cheercategory", "cheer", "value", "selectedcheer");
			if (category == null)
			{
				return BadRequest(Success.Error("No cheer category was given."));
			}

			var reputation = await db.Reputations.FirstOrDefaultAsync(x => x.AccountId == userId);
			if (reputation == null)
			{
				reputation = new Reputation
				{
					AccountId = userId.Value,
					IsCheerful = true,
					CheerCredit = 20
				};
				await db.Reputations.AddAsync(reputation);
			}

			reputation.SelectedCheer = category.Value;
			await db.SaveChangesAsync();

			await Notify.SendAccountUpdate(userId.Value);
			await SendReputationUpdate(userId.Value, reputation);

			return Ok(Success.Ok);
		}

		/// <summary>
		/// The frame the cheer counters and the cheer badge are built from, pushed under
		/// "ReputationUpdate" - the key the 2023 client registers a handler for. The account update
		/// only carries the profile, so without this the cheer a player was just handed, and the
		/// badge it unlocked, stayed invisible on the receiving client until their next login
		/// refetched the reputation, which is what "not updated instantly" looked like.
		/// </summary>
		private static Task SendReputationUpdate(long accountId, Reputation reputation) =>
			Notify.SendNotify(accountId, new Notification
			{
				Id = "ReputationUpdate",
				Msg = CreateClientReputation(reputation.ForClient())
			});
	}
}