using AssortValidator.Common;
using AssortValidator.Common.Models;
using static AssortValidator.Common.Models.Assort;

namespace AssortUpdater
{
    public static class AssortFlattener
    {
        public static List<FlatAssort> FlattenExistingAssorts(Assort existingAssorts)
        {
            var results = new List<FlatAssort>();

            foreach (var assort in existingAssorts.items.Where(x => x.slotId == "hideout"))
            {
                var level = existingAssorts.loyal_level_items.FirstOrDefault(x => x.Key == assort._id);
                var barterDetails = existingAssorts.barter_scheme.FirstOrDefault(x => x.Key == assort._id);
                var firstBarterDetails = barterDetails.Value[0].First();

                results.Add(new FlatAssort
                {
                    AssortId = assort._id,
                    ItemId = assort._tpl,
                    ItemName = ItemTemplateHelper.GetNameById(assort._tpl),
                    Level = level.Value,
                    IsMoney = barterDetails.Value.Count == 1 && ItemTemplateHelper.IsMoney(firstBarterDetails._tpl),
                    BarterDetails = barterDetails.Value.First(),
                    RawItem = assort
                });
            }

            // Add in sub items
            foreach (var subAssort in existingAssorts.items.Where(x => x.slotId != "hideout"))
            {
                // find parent item in assort list we created
                var assortToAddTo = results.Find(x => x.AssortId == subAssort.parentId);
                if (assortToAddTo is null)
                {
                    // check items subitems as some have mods of their own
                    foreach (var result in results)
                    {
                        if (result.SubItems.Any(x => x._id == subAssort.parentId))
                        {
                            assortToAddTo = result;
                            break;
                        }
                    }
                }
                assortToAddTo?.SubItems.Add(subAssort);
            }

            return results;
        }

        public static List<FlatAssort> FlattenLiveAssorts(Assort liveAssorts)
        {
            var results = new List<FlatAssort>();
            foreach (var assort in liveAssorts.items.Where(x => x.slotId == "hideout"))
            {
                var level = liveAssorts.loyal_level_items.FirstOrDefault(x => x.Key == assort._id);
                var barterDetails = liveAssorts.barter_scheme.FirstOrDefault(x => x.Key == assort._id);
                var firstBarterDetails = barterDetails.Value[0].First();

                results.Add(new FlatAssort
                {
                    AssortId = assort._id,
                    ItemId = assort._tpl,
                    ItemName = ItemTemplateHelper.GetNameById(assort._tpl),
                    Level = level.Value,
                    IsMoney = barterDetails.Value.Count == 1 && ItemTemplateHelper.IsMoney(firstBarterDetails._tpl),
                    BarterDetails = barterDetails.Value.First(),
                    RawItem = assort
                });
            }

            // Add in sub items
            foreach (var subAssort in liveAssorts.items.Where(x => x.slotId != "hideout"))
            {
                // find parent item in assort list we created
                var assortToAddTo = results.Find(x => x.AssortId == subAssort.parentId);
                if (assortToAddTo is null)
                {
                    // check items subitems as some have mods of their own
                    foreach (var result in results)
                    {
                        if (result.SubItems.Any(x => x._id == subAssort.parentId))
                        {
                            assortToAddTo = result;
                            break;
                        }
                    }
                }
                assortToAddTo.SubItems.Add(subAssort);
            }

            return results;
        }

        public static Assort UnFlatten(List<FlatAssort> flatAssorts)
        {
            var result = new Assort();
            foreach(var assort in flatAssorts)
            {
                // add loyalty level key/value
                result.loyal_level_items.Add(assort.AssortId, assort.Level);

                // add barter scheme details
                var barterItemsList = ConvertToOutputBarterItemsCollection(assort);
                result.barter_scheme.Add(assort.AssortId, barterItemsList);

                // add base item
                result.items.Add(assort.RawItem);

                // add sub items
                foreach (var item in assort.SubItems)
                {
                    result.items.Add(item);
                }
            }

            return result;
        }

        private static List<List<BarterDetails>> ConvertToOutputBarterItemsCollection(FlatAssort assort)
        {
            var barterItems = new List<BarterDetails>();
            foreach (var item in assort.BarterDetails)
            {
                barterItems.Add(new BarterDetails
                {
                    _tpl = item._tpl,
                    count = item.count,
                    level = item.level,
                    side = item.side,
                });
            }

            return new List<List<BarterDetails>>
            {
                barterItems
            };
        }
    }
}