using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.Json;
using System.Windows;

namespace AxCopilot.Services;

public static class QuoteService
{
	private record FamousQuote(string Text, string Author);

	private record MovieQuote(string Text, string Movie, int Year, string? Character, long? Audience);

	private static readonly Lazy<string[]> _motivational = new Lazy<string[]>(LoadMotivational);

	private static readonly Lazy<FamousQuote[]> _famous = new Lazy<FamousQuote[]>(LoadFamous);

	private static readonly Lazy<string[]> _displaySemi = new Lazy<string[]>(() => LoadSimple("display_semiconductor.json"));

	private static readonly Lazy<string[]> _itAi = new Lazy<string[]>(() => LoadSimple("it_ai.json"));

	private static readonly Lazy<string[]> _science = new Lazy<string[]>(() => LoadSimple("science.json"));

	private static readonly Lazy<string[]> _history = new Lazy<string[]>(() => LoadSimple("history.json"));

	private static readonly Lazy<string[]> _english = new Lazy<string[]>(() => LoadSimple("english.json"));

	private static readonly Lazy<MovieQuote[]> _movies = new Lazy<MovieQuote[]>(LoadMovies);

	private static readonly Lazy<Dictionary<string, string[]>> _todayEvents = new Lazy<Dictionary<string, string[]>>(LoadTodayEvents);

	public static readonly (string Key, string Label, Func<int> Count)[] Categories = new(string, string, Func<int>)[9]
	{
		("motivational", "격려 문구", () => _motivational.Value.Length),
		("famous", "유명 명언", () => _famous.Value.Length),
		("display_semiconductor", "디스플레이/반도체 상식", () => _displaySemi.Value.Length),
		("it_ai", "IT, AI 기술", () => _itAi.Value.Length),
		("science", "일반 과학", () => _science.Value.Length),
		("history", "역사", () => _history.Value.Length),
		("english", "생활영어", () => _english.Value.Length),
		("movies", "드라마/영화 명대사", () => _movies.Value.Length),
		("today_events", "오늘의 역사/기념일", () => GetTodayEventCount())
	};

	private static Dictionary<string, string[]>? _greetingsCache;

	private static DateTime _greetingsCacheTime;

	public static int TotalCount => _motivational.Value.Length + _famous.Value.Length + _displaySemi.Value.Length + _itAi.Value.Length + _science.Value.Length + _history.Value.Length + _english.Value.Length + _movies.Value.Length;

	private static string[] LoadMotivational()
	{
		try
		{
			Uri uriResource = new Uri("pack://application:,,,/Assets/Quotes/motivational.json");
			Stream stream = Application.GetResourceStream(uriResource)?.Stream;
			if (stream == null)
			{
				return Array.Empty<string>();
			}
			using StreamReader streamReader = new StreamReader(stream, Encoding.UTF8);
			return JsonSerializer.Deserialize<string[]>(streamReader.ReadToEnd()) ?? Array.Empty<string>();
		}
		catch (Exception ex)
		{
			LogService.Warn("격려 문구 로드 실패: " + ex.Message);
			return Array.Empty<string>();
		}
	}

	private static FamousQuote[] LoadFamous()
	{
		try
		{
			Uri uriResource = new Uri("pack://application:,,,/Assets/Quotes/famous.json");
			Stream stream = Application.GetResourceStream(uriResource)?.Stream;
			if (stream == null)
			{
				return Array.Empty<FamousQuote>();
			}
			using StreamReader streamReader = new StreamReader(stream, Encoding.UTF8);
			JsonSerializerOptions options = new JsonSerializerOptions
			{
				PropertyNameCaseInsensitive = true
			};
			return JsonSerializer.Deserialize<FamousQuote[]>(streamReader.ReadToEnd(), options) ?? Array.Empty<FamousQuote>();
		}
		catch (Exception ex)
		{
			LogService.Warn("명언 로드 실패: " + ex.Message);
			return Array.Empty<FamousQuote>();
		}
	}

	private static string[] LoadSimple(string fileName)
	{
		try
		{
			Uri uriResource = new Uri("pack://application:,,,/Assets/Quotes/" + fileName);
			Stream stream = Application.GetResourceStream(uriResource)?.Stream;
			if (stream == null)
			{
				return Array.Empty<string>();
			}
			using StreamReader streamReader = new StreamReader(stream, Encoding.UTF8);
			return JsonSerializer.Deserialize<string[]>(streamReader.ReadToEnd()) ?? Array.Empty<string>();
		}
		catch (Exception ex)
		{
			LogService.Warn(fileName + " 로드 실패: " + ex.Message);
			return Array.Empty<string>();
		}
	}

	private static MovieQuote[] LoadMovies()
	{
		try
		{
			Uri uriResource = new Uri("pack://application:,,,/Assets/Quotes/movies.json");
			Stream stream = Application.GetResourceStream(uriResource)?.Stream;
			if (stream == null)
			{
				return Array.Empty<MovieQuote>();
			}
			using StreamReader streamReader = new StreamReader(stream, Encoding.UTF8);
			JsonSerializerOptions options = new JsonSerializerOptions
			{
				PropertyNameCaseInsensitive = true
			};
			return JsonSerializer.Deserialize<MovieQuote[]>(streamReader.ReadToEnd(), options) ?? Array.Empty<MovieQuote>();
		}
		catch
		{
			return Array.Empty<MovieQuote>();
		}
	}

	private static Dictionary<string, string[]> LoadTodayEvents()
	{
		try
		{
			Uri uriResource = new Uri("pack://application:,,,/Assets/Quotes/today_events.json");
			Stream stream = Application.GetResourceStream(uriResource)?.Stream;
			if (stream == null)
			{
				return new Dictionary<string, string[]>();
			}
			using StreamReader streamReader = new StreamReader(stream, Encoding.UTF8);
			return JsonSerializer.Deserialize<Dictionary<string, string[]>>(streamReader.ReadToEnd()) ?? new Dictionary<string, string[]>();
		}
		catch
		{
			return new Dictionary<string, string[]>();
		}
	}

	public static (string Text, string? Author) GetRandom(IEnumerable<string>? enabledCategories = null)
	{
		HashSet<string> hashSet = enabledCategories?.ToHashSet<string>(StringComparer.OrdinalIgnoreCase) ?? new HashSet<string> { "motivational" };
		string timeGreeting = GetTimeGreeting();
		if (hashSet.Contains("today_events"))
		{
			string key = DateTime.Now.ToString("MM-dd");
			if (_todayEvents.Value.TryGetValue(key, out string[] value) && value.Length != 0)
			{
				string text = value[Random.Shared.Next(value.Length)];
				return (Text: timeGreeting + text, Author: "오늘의 역사");
			}
		}
		List<(string, string)> list = new List<(string, string)>();
		if (hashSet.Contains("motivational"))
		{
			string[] value2 = _motivational.Value;
			foreach (string item in value2)
			{
				list.Add((item, null));
			}
		}
		if (hashSet.Contains("famous"))
		{
			FamousQuote[] value3 = _famous.Value;
			foreach (FamousQuote famousQuote in value3)
			{
				list.Add((famousQuote.Text, famousQuote.Author));
			}
		}
		if (hashSet.Contains("display_semiconductor"))
		{
			string[] value4 = _displaySemi.Value;
			foreach (string item2 in value4)
			{
				list.Add((item2, "디스플레이/반도체"));
			}
		}
		if (hashSet.Contains("it_ai"))
		{
			string[] value5 = _itAi.Value;
			foreach (string item3 in value5)
			{
				list.Add((item3, "IT/AI"));
			}
		}
		if (hashSet.Contains("science"))
		{
			string[] value6 = _science.Value;
			foreach (string item4 in value6)
			{
				list.Add((item4, "과학"));
			}
		}
		if (hashSet.Contains("history"))
		{
			string[] value7 = _history.Value;
			foreach (string item5 in value7)
			{
				list.Add((item5, "역사"));
			}
		}
		if (hashSet.Contains("english"))
		{
			string[] value8 = _english.Value;
			foreach (string item6 in value8)
			{
				list.Add((item6, "생활영어"));
			}
		}
		if (hashSet.Contains("movies"))
		{
			MovieQuote[] value9 = _movies.Value;
			foreach (MovieQuote movieQuote in value9)
			{
				string value10 = ((movieQuote.Audience >= 10000000) ? " \ud83e\udd47" : ((movieQuote.Audience >= 7000000) ? " \ud83e\udd48" : ((movieQuote.Audience >= 5000000) ? " \ud83e\udd49" : "")));
				string item7 = $"《{movieQuote.Movie}》({movieQuote.Year}){((movieQuote.Character != null) ? (" — " + movieQuote.Character) : "")}{value10}";
				list.Add(("\"" + movieQuote.Text + "\"", item7));
			}
		}
		if (list.Count == 0)
		{
			return (Text: timeGreeting + "오늘도 열심히 해주셔서 고맙습니다!", Author: null);
		}
		var (text2, item8) = list[Random.Shared.Next(list.Count)];
		return (Text: timeGreeting + text2, Author: item8);
	}

	private static string GetTimeGreeting()
	{
		int hour = DateTime.Now.Hour;
		string key;
		if (hour < 9)
		{
			key = "morning";
		}
		else if (hour >= 12 && hour < 15)
		{
			key = "lunch";
		}
		else
		{
			if (hour < 18)
			{
				return "";
			}
			key = "evening";
		}
		Dictionary<string, string[]> dictionary = LoadGreetings();
		if (dictionary.TryGetValue(key, out var value) && value.Length != 0)
		{
			return value[Random.Shared.Next(value.Length)] + "\n\n";
		}
		return "";
	}

	private static Dictionary<string, string[]> LoadGreetings()
	{
		if (_greetingsCache != null && (DateTime.Now - _greetingsCacheTime).TotalMinutes < 5.0)
		{
			return _greetingsCache;
		}
		JsonSerializerOptions options = new JsonSerializerOptions
		{
			PropertyNameCaseInsensitive = true
		};
		try
		{
			string path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "AxCopilot", "Quotes", "greetings.json");
			if (File.Exists(path))
			{
				string json = File.ReadAllText(path, Encoding.UTF8);
				Dictionary<string, string[]> dictionary = JsonSerializer.Deserialize<Dictionary<string, string[]>>(json, options);
				if (dictionary != null)
				{
					_greetingsCache = dictionary;
					_greetingsCacheTime = DateTime.Now;
					return dictionary;
				}
			}
		}
		catch (Exception ex)
		{
			LogService.Warn("외부 인사문구 로드 실패: " + ex.Message);
		}
		try
		{
			Uri uriResource = new Uri("pack://application:,,,/Assets/Quotes/greetings.json");
			Stream stream = Application.GetResourceStream(uriResource)?.Stream;
			if (stream != null)
			{
				using StreamReader streamReader = new StreamReader(stream, Encoding.UTF8);
				Dictionary<string, string[]> dictionary2 = JsonSerializer.Deserialize<Dictionary<string, string[]>>(streamReader.ReadToEnd(), options);
				if (dictionary2 != null)
				{
					_greetingsCache = dictionary2;
					_greetingsCacheTime = DateTime.Now;
					return dictionary2;
				}
			}
		}
		catch (Exception ex2)
		{
			LogService.Warn("내장 인사문구 로드 실패: " + ex2.Message);
		}
		return _greetingsCache = new Dictionary<string, string[]>();
	}

	private static int GetTodayEventCount()
	{
		return _todayEvents.Value.Values.Sum((string[] v) => v.Length);
	}

	public static int GetTodayMatchCount()
	{
		string key = DateTime.Now.ToString("MM-dd");
		string[] value;
		return _todayEvents.Value.TryGetValue(key, out value) ? value.Length : 0;
	}
}