using System;
using System.Collections.Generic;
using AxCopilot.Models;

namespace AxCopilot.Services;

public static class TokenEstimator
{
	public static int Estimate(string text)
	{
		if (string.IsNullOrEmpty(text))
		{
			return 0;
		}
		int num = 0;
		int length = text.Length;
		foreach (char c in text)
		{
			if (c >= '가' && c <= '힣')
			{
				num++;
			}
			else if (c >= '\u3000' && c <= '鿿')
			{
				num++;
			}
		}
		double num2 = ((length > 0) ? ((double)num / (double)length) : 0.0);
		double num3 = 4.0 - num2 * 2.0;
		return Math.Max(1, (int)((double)length / num3));
	}

	public static int EstimateMessages(IEnumerable<ChatMessage> messages)
	{
		int num = 0;
		foreach (ChatMessage message in messages)
		{
			num += Estimate(message.Content) + 4;
		}
		return num;
	}

	public static (double InputCost, double OutputCost) EstimateCost(int promptTokens, int completionTokens, string service, string model)
	{
		var (num, num2) = GetPricing(service, model);
		return (InputCost: (double)promptTokens / 1000000.0 * num, OutputCost: (double)completionTokens / 1000000.0 * num2);
	}

	public static (double Input, double Output) GetPricing(string service, string model)
	{
		string text = (service + ":" + model).ToLowerInvariant();
		string text2 = text;
		if (1 == 0)
		{
		}
		(double, double) result = ((!text.Contains("claude-opus")) ? ((!text.Contains("claude-sonnet")) ? ((!text.Contains("claude-haiku")) ? ((!text.Contains("gemini-2.5-pro")) ? ((!text.Contains("gemini-2.5-flash")) ? ((!text.Contains("gemini-2.0")) ? ((!text.Contains("ollama")) ? ((!text.Contains("vllm")) ? (1.0, 3.0) : (0.0, 0.0)) : (0.0, 0.0)) : (0.1, 0.4)) : (0.15, 0.6)) : (1.25, 10.0)) : (0.25, 1.25)) : (3.0, 15.0)) : (15.0, 75.0));
		if (1 == 0)
		{
		}
		return result;
	}

	public static string Format(int count)
	{
		if (1 == 0)
		{
		}
		string result = ((count >= 1000000) ? $"{(double)count / 1000000.0:0.#}M" : ((count < 1000) ? count.ToString() : $"{(double)count / 1000.0:0.#}k"));
		if (1 == 0)
		{
		}
		return result;
	}

	public static string FormatCost(double usd)
	{
		if (1 == 0)
		{
		}
		string result = ((usd == 0.0) ? "무료" : ((usd < 0.01) ? $"${usd:F4}" : ((!(usd < 1.0)) ? $"${usd:F2}" : $"${usd:F3}")));
		if (1 == 0)
		{
		}
		return result;
	}

	public static double GetContextUsage(int currentTokens, int maxContextTokens)
	{
		if (maxContextTokens <= 0)
		{
			return 0.0;
		}
		return Math.Min(1.0, (double)currentTokens / (double)maxContextTokens);
	}
}