using Oms.Application.Dtos.Orders;

namespace Oms.Application.Services.Orders;

internal static class PriceCheckHintBuilder
{
    public static OrderPriceCheckHintOutput BuildQueryHint(PriceCheckInputProfile profile)
    {
        var missing = profile.MissingFieldCodes.ToList();
        var disclaimers = BuildDisclaimers(missing);
        if (profile.IsQueryEstimated)
        {
            disclaimers.Add("以下报价可能含估算项，最终以预报/入库计费为准。");
        }

        return new OrderPriceCheckHintOutput
        {
            QuoteLevel = profile.IsQueryEstimated
                ? PriceCheckQuoteLevelCodes.Estimated
                : PriceCheckQuoteLevelCodes.Exact,
            MissingFieldCodes = missing,
            Disclaimers = disclaimers
        };
    }

    public static (string QuoteLevel, List<string> MissingFieldCodes, List<string> Disclaimers) BuildItemHint(
        PriceCheckInputProfile profile,
        bool usedZoneFallback)
    {
        var missing = profile.MissingFieldCodes.ToList();
        if (usedZoneFallback && !missing.Contains(PriceCheckMissingFieldCodes.PostalCode))
        {
            missing.Add(PriceCheckMissingFieldCodes.PostalCode);
        }

        var disclaimers = BuildDisclaimers(missing);
        if (usedZoneFallback)
        {
            disclaimers.Add("未匹配到精确分区，本行按可匹配分区参考价展示，下单后可能调整。");
        }

        var estimated = missing.Count > 0 || usedZoneFallback;
        return (
            estimated ? PriceCheckQuoteLevelCodes.Estimated : PriceCheckQuoteLevelCodes.Exact,
            missing,
            disclaimers);
    }

    private static List<string> BuildDisclaimers(IReadOnlyList<string> missingFieldCodes)
    {
        var disclaimers = new List<string>();
        foreach (var code in missingFieldCodes)
        {
            var text = code switch
            {
                PriceCheckMissingFieldCodes.Dimensions =>
                    "未填写包裹尺寸：计费重按实重估算，入库实测尺寸后价格可能变化。",
                PriceCheckMissingFieldCodes.PostalCode =>
                    "未填写邮编：优先按州/市或国家级分区匹配，精确邮编可能调整价格。",
                PriceCheckMissingFieldCodes.Province =>
                    "未填写省州：无邮编时无法按州/市降级匹配，分区可能按国家级兜底。",
                PriceCheckMissingFieldCodes.City =>
                    "未填写城市：无邮编且州未命中时无法按城市匹配。",
                PriceCheckMissingFieldCodes.CargoType =>
                    "未选择货物属性：已分别试算普货/带电/敏感货等，下单时以所选属性为准。",
                PriceCheckMissingFieldCodes.Warehouse =>
                    "未选择仓库：展示各仓库报价，下单时请确认发货仓。",
                _ => null
            };

            if (!string.IsNullOrWhiteSpace(text))
            {
                disclaimers.Add(text);
            }
        }

        return disclaimers;
    }
}