using Microsoft.AspNetCore.Mvc;
using System.Text.Json;
using RadicadeServer.DB;
using RadicadeServer.Extensions;
using RadicadeServer.RecNet.Responses;

namespace RadicadeServer.API.InfluencerPartnerProgram
{
	[Route("api/influencerpartnerprogram")]
	[Route("econ/api/influencerpartnerprogram")]
	public class InfluencerPartnerProgramAPI : Controller
	{
		[HttpGet("influencers")]
		[HttpGet("v1/influencers")]
		public IActionResult GetInfluencers([FromQuery] int? take)
		{
			return Ok(new
			{
				ContinuationToken = (string?)null,
				InfluencerIds = DBConfig.TestInfluencerAccountIds.ToArray(),
			});
		}

		[HttpGet("myinfluencer")]
		public IActionResult GetMyInfluencer()
		{
			var accountId = User.GetUserId() ?? 0;
			return Ok(DBConfig.TestInfluencerAccountIds.Contains(accountId) ? accountId : 0L);
		}

		[HttpGet("influencer")]
		public IActionResult GetInfluencer([FromQuery] long accountId) =>
			DBConfig.TestInfluencerAccountIds.Contains(accountId)
				? Ok(accountId)
				: NotFound();

		[HttpGet("isinfluencer")]
		public IActionResult IsInfluencer([FromQuery] long accountId) =>
			Ok(DBConfig.TestInfluencerAccountIds.Contains(accountId));

		[HttpGet("code/{accountId:long}")]
		[HttpGet("v1/code/{accountId:long}")]
		public IActionResult GetInfluencerCode(long accountId)
		{
			if (!DBConfig.TestInfluencerAccountIds.Contains(accountId))
				return NotFound();
			return Ok(new { AccountId = accountId, Code = "COACH" });
		}

		[HttpPost("redeem")]
		[HttpPost("v1/redeem")]
		[HttpPost("useCode")]
		public async Task<IActionResult> RedeemCode()
		{
			var fields = await ReadRequestFieldsAsync();
			var request = new InfluencerCodeRequest
			{
				Code = FirstField(fields, "Code", "code", "InfluencerCode", "influencerCode")
			};

			if (!string.Equals(request.Code?.Trim(), "COACH", StringComparison.OrdinalIgnoreCase))
				return BadRequest(new { Success = false, Message = "Invalid code." });
			return Ok(new { Success = true, Code = "COACH", InfluencerAccountId = 1L });
		}

		[HttpGet("validate")]
		public IActionResult ValidateCode([FromQuery] string? code) =>
			string.Equals(code?.Trim(), "COACH", StringComparison.OrdinalIgnoreCase)
				? Ok(new { Success = true, Code = "COACH", InfluencerAccountId = 1L })
				: BadRequest(new { Success = false, Message = "Invalid code." });

		[HttpPost("support")]
		[HttpPost("v1/support")]
		public IActionResult SupportCoach() => Ok(new
		{
			Success = true,
			Supported = true,
			InfluencerAccountId = 1L,
			Code = "COACH"
		});

		[HttpPost("remove")]
		public async Task<IActionResult> RemoveInfluencer()
		{
			var fields = await ReadRequestFieldsAsync();
			var rawAccountId = FirstField(fields, "influencerAccountId", "InfluencerAccountId", "accountId", "AccountId");
			if (!int.TryParse(rawAccountId, out var influencerAccountId))
				return BadRequest(Success.Error("Missing request body."));

			var request = new InfluencerRemoveRequest { influencerAccountId = influencerAccountId };
			return Ok(Success.Ok);
		}

		private async Task<Dictionary<string, string>> ReadRequestFieldsAsync()
		{
			var fields = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);

			foreach (var kv in Request.Query)
				fields[kv.Key] = kv.Value.ToString();

			if (Request.HasFormContentType)
			{
				var form = await Request.ReadFormAsync();
				foreach (var kv in form)
					fields[kv.Key] = kv.Value.ToString();
				return fields;
			}

			if (Request.ContentLength is not > 0) return fields;

			try
			{
				Request.EnableBuffering();
				Request.Body.Position = 0;
				string body;
				using (var reader = new StreamReader(Request.Body, leaveOpen: true))
					body = await reader.ReadToEndAsync();
				Request.Body.Position = 0;

				var trimmed = body.TrimStart();
				if (trimmed.StartsWith("{", StringComparison.Ordinal))
				{
					using var doc = JsonDocument.Parse(body);
					if (doc.RootElement.ValueKind == JsonValueKind.Object)
						foreach (var prop in doc.RootElement.EnumerateObject())
							fields[prop.Name] = prop.Value.ValueKind == JsonValueKind.String
								? prop.Value.GetString() ?? ""
								: prop.Value.ToString();
				}
				else if (trimmed.Contains('='))
				{
					foreach (var pair in body.Split('&', StringSplitOptions.RemoveEmptyEntries))
					{
						var eq = pair.IndexOf('=');
						if (eq < 0)
						{
							fields[Uri.UnescapeDataString(pair)] = "";
							continue;
						}

						fields[Uri.UnescapeDataString(pair.Substring(0, eq))] = Uri.UnescapeDataString(pair.Substring(eq + 1));
					}
				}
			}
			catch { }

			return fields;
		}

		private static string? FirstField(Dictionary<string, string> fields, params string[] names)
		{
			foreach (var name in names)
				if (fields.TryGetValue(name, out var value) && !string.IsNullOrWhiteSpace(value))
					return value;

			return null;
		}
	}

	public sealed class InfluencerCodeRequest
	{
		public string? Code { get; set; }
	}

	public sealed class InfluencerRemoveRequest
	{
		public int influencerAccountId { get; set; }
	}
}