using System.Globalization;
using System.Text;

namespace line_gestao_api.Services;

internal static class MveAuditNormalization
{
    public static string NormalizeHeader(string? value)
    {
        if (string.IsNullOrWhiteSpace(value))
        {
            return string.Empty;
        }

        var normalized = value.Trim().ToUpperInvariant().Normalize(NormalizationForm.FormD);
        var builder = new StringBuilder(normalized.Length);
        foreach (var ch in normalized)
        {
            if (CharUnicodeInfo.GetUnicodeCategory(ch) != UnicodeCategory.NonSpacingMark)
            {
                builder.Append(ch);
            }
        }

        return builder.ToString()
            .Replace("\u00A0", " ")
            .Trim();
    }

    public static string CleanTextValue(string? value, bool removeSingleQuotes = true)
    {
        if (string.IsNullOrWhiteSpace(value))
        {
            return string.Empty;
        }

        var cleaned = value
            .Replace("\u00A0", " ")
            .Replace("\t", " ")
            .Replace("\r", " ")
            .Replace("\n", " ")
            .Trim();

        if (removeSingleQuotes)
        {
            cleaned = cleaned.Replace("'", string.Empty);
        }

        while (cleaned.Contains("  ", StringComparison.Ordinal))
        {
            cleaned = cleaned.Replace("  ", " ", StringComparison.Ordinal);
        }

        return cleaned.Trim();
    }

    public static string OnlyDigits(string? value)
    {
        if (string.IsNullOrWhiteSpace(value))
        {
            return string.Empty;
        }

        var builder = new StringBuilder(value.Length);
        foreach (var ch in value)
        {
            if (char.IsDigit(ch))
            {
                builder.Append(ch);
            }
        }

        return builder.ToString();
    }

    public static string? NullIfEmptyDigits(string? value)
    {
        var digits = OnlyDigits(value);
        return string.IsNullOrWhiteSpace(digits) ? null : digits;
    }

    public static string NormalizePhoneDigits(string? value)
    {
        var digits = OnlyDigits(value);
        if (string.IsNullOrWhiteSpace(digits))
        {
            return string.Empty;
        }

        if (digits.StartsWith("55", StringComparison.Ordinal) && digits.Length is 12 or 13)
        {
            digits = digits[2..];
        }

        return digits.Length > 11 ? digits[^11..] : digits;
    }

    public static string ExtractPhoneDdd(string? value)
    {
        var digits = NormalizePhoneDigits(value);
        return digits.Length >= 10 ? digits[..2] : string.Empty;
    }

    public static string ExtractPhoneLocalNumber(string? value)
    {
        var digits = NormalizePhoneDigits(value);
        return digits.Length >= 10 ? digits[2..] : digits;
    }

    public static string NormalizeComparableText(string? value)
    {
        var cleaned = CleanTextValue(value);
        if (string.IsNullOrWhiteSpace(cleaned))
        {
            return string.Empty;
        }

        return NormalizeHeader(cleaned)
            .Replace("  ", " ", StringComparison.Ordinal)
            .Trim();
    }

    public static string NormalizeAccountLike(string? value)
    {
        var digits = OnlyDigits(value);
        if (!string.IsNullOrWhiteSpace(digits))
        {
            return digits;
        }

        return NormalizeComparableText(value);
    }

    public static DateTime? ParseDateValue(string? rawValue)
    {
        var cleaned = CleanTextValue(rawValue);
        if (string.IsNullOrWhiteSpace(cleaned))
        {
            return null;
        }

        if (double.TryParse(
            cleaned.Replace(",", ".", StringComparison.Ordinal),
            NumberStyles.Float,
            CultureInfo.InvariantCulture,
            out var oaValue) &&
            oaValue > 10_000 &&
            oaValue < 90_000)
        {
            try
            {
                return ToUtcDateOnly(DateTime.FromOADate(oaValue));
            }
            catch
            {
                // segue para os demais formatos
            }
        }

        var formats = new[]
        {
            "dd/MM/yyyy",
            "d/M/yyyy",
            "dd/MM/yy",
            "d/M/yy",
            "yyyy-MM-dd",
            "dd-MM-yyyy",
            "d-M-yyyy",
            "yyyyMMdd"
        };

        foreach (var format in formats)
        {
            if (DateTime.TryParseExact(
                cleaned,
                format,
                CultureInfo.InvariantCulture,
                DateTimeStyles.None,
                out var exact))
            {
                return ToUtcDateOnly(exact);
            }
        }

        if (DateTime.TryParse(cleaned, new CultureInfo("pt-BR"), DateTimeStyles.None, out var parsedBr))
        {
            return ToUtcDateOnly(parsedBr);
        }

        if (DateTime.TryParse(cleaned, CultureInfo.InvariantCulture, DateTimeStyles.None, out var parsedInvariant))
        {
            return ToUtcDateOnly(parsedInvariant);
        }

        return null;
    }

    public static DateTime ToUtcDateOnly(DateTime date)
    {
        return new DateTime(date.Year, date.Month, date.Day, 12, 0, 0, DateTimeKind.Utc);
    }

    public static string FormatDate(DateTime? value)
    {
        return value.HasValue ? value.Value.ToString("dd/MM/yyyy", CultureInfo.InvariantCulture) : string.Empty;
    }

    public static MveNormalizedStatus NormalizeReportStatus(string? rawValue)
    {
        var displayValue = CleanTextValue(rawValue);
        if (string.IsNullOrWhiteSpace(displayValue))
        {
            return new MveNormalizedStatus(string.Empty, string.Empty, false);
        }

        var headSegment = NormalizeComparableText(displayValue.Split(':', 2)[0])
            .Replace("/", " ", StringComparison.Ordinal)
            .Replace("-", " ", StringComparison.Ordinal)
            .Replace(".", " ", StringComparison.Ordinal)
            .Replace("(", " ", StringComparison.Ordinal)
            .Replace(")", " ", StringComparison.Ordinal)
            .Replace("  ", " ", StringComparison.Ordinal)
            .Trim();

        var canonical = NormalizeComparableText(displayValue)
            .Replace("/", " ", StringComparison.Ordinal)
            .Replace("-", " ", StringComparison.Ordinal)
            .Replace(".", " ", StringComparison.Ordinal)
            .Replace("(", " ", StringComparison.Ordinal)
            .Replace(")", " ", StringComparison.Ordinal)
            .Replace("  ", " ", StringComparison.Ordinal)
            .Trim();

        var key = headSegment switch
        {
            var text when text.Contains("ATIVO", StringComparison.Ordinal) || text == "ATIVA" => "ATIVO",
            var text when text.Contains("BLOQUEIO PARCIAL", StringComparison.Ordinal) => "BLOQUEIO_PERDA_ROUBO",
            var text when text.Contains("PRE ATIVACAO", StringComparison.Ordinal) => "BLOQUEIO_PERDA_ROUBO",
            var text when text.Contains("CANCEL", StringComparison.Ordinal) => "BLOQUEIO_120_DIAS",
            var text when text.Contains("SUSPENS", StringComparison.Ordinal) => "SUSPENSO",
            var text when text.Contains("PENDENTE", StringComparison.Ordinal) &&
                           text.Contains("TROCA", StringComparison.Ordinal) &&
                           text.Contains("NUMERO", StringComparison.Ordinal) => "PENDENTE_TROCA_NUMERO",
            var text when text.Contains("PERDA", StringComparison.Ordinal) || text.Contains("ROUBO", StringComparison.Ordinal) => "BLOQUEIO_PERDA_ROUBO",
            var text when text.Contains("BLOQUEIO", StringComparison.Ordinal) && text.Contains("120", StringComparison.Ordinal) => "BLOQUEIO_120_DIAS",
            _ => canonical.Replace(" ", "_", StringComparison.Ordinal)
        };

        var recognized = key is
            "ATIVO" or
            "BLOQUEIO_PERDA_ROUBO" or
            "BLOQUEIO_120_DIAS" or
            "SUSPENSO" or
            "PENDENTE_TROCA_NUMERO";

        return new MveNormalizedStatus(displayValue, key, recognized);
    }

    public static MveNormalizedStatus NormalizeSystemStatus(string? rawValue)
    {
        var displayValue = CleanTextValue(rawValue);
        if (string.IsNullOrWhiteSpace(displayValue))
        {
            return new MveNormalizedStatus(string.Empty, string.Empty, false);
        }

        var canonical = NormalizeComparableText(displayValue)
            .Replace("/", " ", StringComparison.Ordinal)
            .Replace("-", " ", StringComparison.Ordinal)
            .Replace(".", " ", StringComparison.Ordinal)
            .Replace(":", " ", StringComparison.Ordinal)
            .Replace("(", " ", StringComparison.Ordinal)
            .Replace(")", " ", StringComparison.Ordinal)
            .Replace("  ", " ", StringComparison.Ordinal)
            .Trim();

        var key = canonical switch
        {
            var text when text.Contains("ATIVO", StringComparison.Ordinal) || text == "ATIVA" => "ATIVO",
            var text when text.Contains("PERDA", StringComparison.Ordinal) || text.Contains("ROUBO", StringComparison.Ordinal) => "BLOQUEIO_PERDA_ROUBO",
            var text when text.Contains("BLOQUEIO PARCIAL", StringComparison.Ordinal) => "BLOQUEIO_PERDA_ROUBO",
            var text when text.Contains("PRE ATIVACAO", StringComparison.Ordinal) => "BLOQUEIO_PERDA_ROUBO",
            var text when text.Contains("BLOQUEIO", StringComparison.Ordinal) && text.Contains("120", StringComparison.Ordinal) => "BLOQUEIO_120_DIAS",
            var text when text.Contains("CANCEL", StringComparison.Ordinal) => "CANCELADO",
            var text when text.Contains("SUSPENS", StringComparison.Ordinal) => "SUSPENSO",
            var text when text.Contains("PENDENTE", StringComparison.Ordinal) &&
                           text.Contains("TROCA", StringComparison.Ordinal) &&
                           text.Contains("NUMERO", StringComparison.Ordinal) => "PENDENTE_TROCA_NUMERO",
            _ => canonical.Replace(" ", "_", StringComparison.Ordinal)
        };

        var recognized = key is
            "ATIVO" or
            "BLOQUEIO_PERDA_ROUBO" or
            "BLOQUEIO_120_DIAS" or
            "CANCELADO" or
            "SUSPENSO" or
            "PENDENTE_TROCA_NUMERO";

        return new MveNormalizedStatus(displayValue, key, recognized);
    }

    public static MveNormalizedStatus NormalizeStatus(string? rawValue)
    {
        return NormalizeSystemStatus(rawValue);
    }

    public static string NormalizeStatusForSystem(string? rawValue)
    {
        var normalized = NormalizeReportStatus(rawValue);
        return normalized.Key switch
        {
            "ATIVO" => "ATIVO",
            "BLOQUEIO_PERDA_ROUBO" => "BLOQUEIO PERDA/ROUBO",
            "BLOQUEIO_120_DIAS" => "BLOQUEIO 120 DIAS",
            "SUSPENSO" => "SUSPENSO",
            "PENDENTE_TROCA_NUMERO" => "PENDENTE TROCA NUMERO",
            _ => normalized.DisplayValue
        };
    }
}

internal sealed record MveNormalizedStatus(string DisplayValue, string Key, bool Recognized);