using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Text.Json;
using System.Text.Json.Serialization;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace CPRNIMS.Infrastructure.Dto.Canvass.Result
{
    public class GroqSupplierResult
    {
        [JsonPropertyName("company_name")]
        public string CompanyName { get; set; } = string.Empty;

        [JsonPropertyName("country")]
        public string? Country { get; set; }

        [JsonPropertyName("phone_number")]
        public string? PhoneNumber { get; set; }

        [JsonPropertyName("contact_email")]
        public string? ContactEmail { get; set; }

        [JsonPropertyName("website")]
        public string? Website { get; set; }

        [JsonPropertyName("source")]
        public string? Source { get; set; }

        [JsonConverter(typeof(FlexibleDecimalConverter))]  
        public decimal? EstimatedPriceUsd { get; set; }

        [JsonPropertyName("item_specifications")]
        public JsonElement? ItemSpecifications { get; set; }
    }
    public class FlexibleDecimalConverter : JsonConverter<decimal?>
    {
        public override decimal? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
        {
            switch (reader.TokenType)
            {
                case JsonTokenType.Number:
                    return reader.TryGetDecimal(out var num) ? num : null;

                case JsonTokenType.String:
                    var str = reader.GetString()?.Trim();
                    if (string.IsNullOrWhiteSpace(str)) return null;

                    // Strip currency symbols and commas e.g. "$1,200.00" → 1200.00
                    str = Regex.Replace(str, @"[^\d.]", "");
                    return decimal.TryParse(str, NumberStyles.Any, CultureInfo.InvariantCulture, out var parsed)
                        ? parsed
                        : null;  // "contact for pricing", "varies", etc. → null

                case JsonTokenType.Null:
                default:
                    return null;
            }
        }

        public override void Write(Utf8JsonWriter writer, decimal? value, JsonSerializerOptions options)
        {
            if (value.HasValue) writer.WriteNumberValue(value.Value);
            else writer.WriteNullValue();
        }
    }
    public class TavilySearchResult
    {
        public List<TavilyResult> Results { get; set; } = new();
    }

    public class TavilyResult
    {
        public string Title { get; set; } = string.Empty;
        public string Url { get; set; } = string.Empty;
        public string Content { get; set; } = string.Empty;
        public double Score { get; set; }
    }
    public class GroqMatchResult
    {
        public bool Matched { get; set; }
        public int? SupplierId { get; set; }
    }
    public class GroqResponse
    {
        public List<GroqChoice> Choices { get; set; } = new();
    }

    public class GroqChoice
    {
        public GroqMessage Message { get; set; } = new();
    }

    public class GroqMessage
    {
        public string Content { get; set; } = string.Empty;
    }
}