using Oms.Application.Dtos.Orders;
using Oms.Domain.ChannelsAggregate.Entities;

namespace Oms.Application.Shared;

/// <summary>
/// KPI 分区快照映射。邮编区间为闭区间，prefix/exact/range 编码进 PostcodeRange。
/// </summary>
public static class KpiAreaSnapshotMapper
{
    public static KpiAreaSnapshotRuleDto MapToSnapshotRule(KpiAreaInfo entity) =>
        new()
        {
            Id = entity.Id,
            CountryCode = entity.CountryCode,
            Province = entity.Province,
            City = entity.City,
            MatchDim = entity.MatchDim,
            MatchMode = entity.MatchMode,
            PrefixLen = entity.PrefixLen,
            PostcodeRange = BuildPostcodeRange(entity.LeftPostcode, entity.RightPostcode)
        };

    public static string? BuildPostcodeRange(string? left, string? right)
    {
        var zipLeft = GeoPartitionMatcher.NormalizeZip(left);
        var zipRight = GeoPartitionMatcher.NormalizeZip(right);
        if (zipLeft.Length == 0 && zipRight.Length == 0)
        {
            return null;
        }

        if (zipLeft.Length > 0 && zipRight.Length == 0)
        {
            return $"prefix:{zipLeft}";
        }

        if (zipLeft.Length == 0 && zipRight.Length > 0)
        {
            return $"prefix:{zipRight}";
        }

        if (zipLeft == zipRight)
        {
            return $"exact:{zipLeft}";
        }

        return $"[{zipLeft},{zipRight}]";
    }

    public static string? ResolvePostcodeRange(KpiAreaSnapshotRuleDto rule)
    {
        if (!string.IsNullOrWhiteSpace(rule.PostcodeRange))
        {
            return rule.PostcodeRange.Trim();
        }

        return BuildPostcodeRange(rule.LeftPostcode, rule.RightPostcode);
    }

    public static bool IsRuleMatched(
        KpiAreaSnapshotRuleDto rule,
        string countryCode,
        string? province,
        string? city,
        string? zipCode) =>
        GeoPartitionMatcher.IsHit([rule], countryCode, province, city, zipCode);
}