using System;
using System.Reflection;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Newtonsoft.Json;

namespace jsonapi.Controllers
{
	[ApiController]
	[Route("data")]
	[Produces("application/json")]
	public class DataController : ControllerBase
	{

		private IConfiguration configuration;
		private Library.SHA256HashGenerator sha256HashGenerator;
		private Library.JsonFileReader jsonFileReader;

		public DataController(IConfiguration config)
		{
			configuration = config;
			sha256HashGenerator = Library.SHA256HashGenerator.GetInstance();
			jsonFileReader = Library.JsonFileReader.GetInstance();
		}

		[HttpGet("{key}")]
		public IActionResult Get(string key)
		{
			string worldPath = configuration.GetSection("jsonapi").GetValue<string>("world");
			string filePath = worldPath + "/data/" + sha256HashGenerator.Get(key) + ".json";
			if(!System.IO.File.Exists(filePath)) {
				dynamic errorObject = new
				{
					errorCode = StatusCodes.Status404NotFound,
					errorMessage = "404 Error: That key has no associated data.",
					filePath = filePath
				};
				return StatusCode(errorObject.errorCode, errorObject);
			}

			try
			{
				var json = jsonFileReader.Read(filePath);
				return Ok(json);
			}
			catch (Exception)
			{
				dynamic errorObject = new
				{
					errorCode = StatusCodes.Status500InternalServerError,
					errorMessage = "500 Error: Something went wrong. Please contact the administrator for assistance.",
					filePath = filePath
				};
				return StatusCode(errorObject.errorCode, errorObject);
			}
		}

		[HttpPost("{key}")]
		public IActionResult Save(string key, [FromBody] dynamic body)
		{
			string worldPath = configuration.GetSection("jsonapi").GetValue<string>("world");
			string filePath = worldPath + "/data/" + sha256HashGenerator.Get(key) + ".json";

			dynamic json = body;
			if(System.IO.File.Exists(filePath)) {
				try
				{
					json = jsonFileReader.Read(filePath);
					foreach (var prop in body)
					{
						json[prop.Name] = prop.Value;
					}
				}
				catch (Exception) { }
			}
			
			System.IO.File.WriteAllText(filePath, JsonConvert.SerializeObject(json, Formatting.Indented));

			return Ok(json);

		}

		[HttpPut("{key}")]
		public IActionResult Put(string key, [FromBody] dynamic body)
		{
			string worldPath = configuration.GetSection("jsonapi").GetValue<string>("world");
			string filePath = worldPath + "/data/" + sha256HashGenerator.Get(key) + ".json";
			System.IO.File.WriteAllText(filePath, JsonConvert.SerializeObject(body, Formatting.Indented));
			return Ok(body);
		}

		[HttpDelete("{key}")]
		public IActionResult Delete(string key)
		{
			string worldPath = configuration.GetSection("jsonapi").GetValue<string>("world");
			string filePath = worldPath + "/data/" + sha256HashGenerator.Get(key) + ".json";
			System.IO.File.Delete(filePath);
			return Ok();
		}
	}
}