using System;
using System.Collections.Generic;
using System.Linq;
using static PKHeX.Core.EncounterUtil;

namespace PKHeX.Core
{
    internal static class Encounters7b
    {
        internal static readonly EncounterArea7b[] SlotsGP = EncounterArea7b.GetAreas(Get("gp", "gg"), GameVersion.GP);
        internal static readonly EncounterArea7b[] SlotsGE = EncounterArea7b.GetAreas(Get("ge", "gg"), GameVersion.GE);
        private static byte[][] Get(string resource, string ident) => BinLinker.Unpack(Util.GetBinaryResource($"encounter_{resource}.pkl"), ident);

        static Encounters7b()
        {
            ManuallyAddRareSpawns(SlotsGP);
            ManuallyAddRareSpawns(SlotsGE);
            Encounter_GG.SetVersion(GameVersion.GG);
            TradeGift_GG.SetVersion(GameVersion.GG);
        }

        private static readonly EncounterStatic7b[] Encounter_GG =
        {
            // encounters
            new EncounterStatic7b { Species = 144, Level = 50, Location = 44, FlawlessIVCount = 3, }, // Articuno @ Seafoam Islands
            new EncounterStatic7b { Species = 145, Level = 50, Location = 42, FlawlessIVCount = 3, }, // Zapdos @ Power Plant
            new EncounterStatic7b { Species = 146, Level = 50, Location = 45, FlawlessIVCount = 3, }, // Moltres @ Victory Road
            new EncounterStatic7b { Species = 150, Level = 70, Location = 46, FlawlessIVCount = 3, }, // Mewtwo @ Cerulean Cave
            new EncounterStatic7b { Species = 143, Level = 34, Location = 14, FlawlessIVCount = 3, }, // Snorlax @ Route 12
            new EncounterStatic7b { Species = 143, Level = 34, Location = 18, FlawlessIVCount = 3, }, // Snorlax @ Route 16
            // unused new EncounterStatic7b { Species = 100, Level = 42, Location = 42, FlawlessIVCount = 3, }, // Voltorb @ Power Plant
            // collision new EncounterStatic7b { Species = 101, Level = 42, Location = 42, FlawlessIVCount = 3, }, // Electrode @ Power Plant

            // gifts
            new EncounterStatic7b { Species = 025, Level = 05, Location = 28, Gift = true, IVs = new[] {31,31,31,31,31,31}, Shiny = Shiny.Never, Form = 8, Version = GameVersion.GP }, // Pikachu @ Pallet Town
            new EncounterStatic7b { Species = 133, Level = 05, Location = 28, Gift = true, IVs = new[] {31,31,31,31,31,31}, Shiny = Shiny.Never, Form = 1, Version = GameVersion.GE }, // Eevee @ Pallet Town

            new EncounterStatic7b { Species = 129, Level = 05, Location = 06, Gift = true, IVs = new[] {30,31,25,30,25,25} }, // Magikarp @ Route 4

            // unused new EncounterStatic7b { Species = 133, Level = 30, Location = 34, Gift = true }, // Eevee @ Celadon City
            new EncounterStatic7b { Species = 131, Level = 34, Location = 52, Gift = true, IVs = new[] {31,25,25,25,30,30} }, // Lapras @ Saffron City (Silph Co. Employee, inside)
            new EncounterStatic7b { Species = 106, Level = 30, Location = 38, Gift = true, IVs = new[] {25,30,25,31,25,30} }, // Hitmonlee @ Saffron City (Karate Master)
            new EncounterStatic7b { Species = 107, Level = 30, Location = 38, Gift = true, IVs = new[] {25,31,30,25,25,30} }, // Hitmonchan @ Saffron City (Karate Master)
            new EncounterStatic7b { Species = 140, Level = 44, Location = 36, Gift = true, FlawlessIVCount = 3 }, // Kabuto @ Cinnabar Island (Cinnabar Pokémon Lab)
            new EncounterStatic7b { Species = 138, Level = 44, Location = 36, Gift = true, FlawlessIVCount = 3 }, // Omanyte @ Cinnabar Island (Cinnabar Pokémon Lab)
            new EncounterStatic7b { Species = 142, Level = 44, Location = 36, Gift = true, FlawlessIVCount = 3 }, // Aerodactyl @ Cinnabar Island (Cinnabar Pokémon Lab)
            new EncounterStatic7b { Species = 001, Level = 12, Location = 31, Gift = true, IVs = new[] {31,25,30,25,25,30} }, // Bulbasaur @ Cerulean City
            new EncounterStatic7b { Species = 004, Level = 14, Location = 26, Gift = true, IVs = new[] {25,30,25,31,30,25} }, // Charmander @ Route 24
            new EncounterStatic7b { Species = 007, Level = 16, Location = 33, Gift = true, IVs = new[] {25,25,30,25,31,30} }, // Squirtle @ Vermillion City
            new EncounterStatic7b { Species = 137, Level = 34, Location = 38, Gift = true, IVs = new[] {25,25,30,25,31,30} }, // Porygon @ Saffron City (Silph Co. Employee, outside)
            new EncounterStatic7b { Species = 053, Level = 16, Location = 33, Gift = true, IVs = new[] {30,30,25,31,25,25}, Version = GameVersion.GP }, // Persian @ Vermillion City (Outside Fan Club)
            new EncounterStatic7b { Species = 059, Level = 16, Location = 33, Gift = true, IVs = new[] {25,30,25,31,30,25}, Version = GameVersion.GE }, // Arcanine @ Vermillion City (Outside Fan Club)
        };

        private static readonly string[] T1 = { string.Empty, "ミニコ", "Tatianna", "BarbaRatatta", "Addoloratta", "Barbaratt", string.Empty, "Tatiana", "미니꼬", "小幂妮", "小幂妮", };
        private static readonly string[] T2 = { string.Empty, "ボーアイス", "Nicholice", "Iceman-4L0L4", "Goffreddo", "Eisper", string.Empty, "Gelasio", "보아이스", "露冰冰", "露冰冰", };
        private static readonly string[] T3 = { string.Empty, "レディダグ", "Diggette", "Taupilady", "Lady Glett", "Digga", string.Empty, "Glenda", "레이디그다", "蒂淑", "蒂淑", };
        private static readonly string[] T4 = { string.Empty, "ワルモン", "Darko", "AlolaZeDark", "Mattetro", "Bösbert", string.Empty, "Sinesio", "나뻐기", "达怀丹", "达怀丹", };
        private static readonly string[] T5 = { string.Empty, "エリッチ", "Psytrice", "TopDeTonCœur", "Chulia", "Assana", string.Empty, "Menchu", "엘리츄", "晶莹丘", "晶莹丘", };
        private static readonly string[] T6 = { string.Empty, "ジェンガラ", "Genmar", "OSS-Dandy7", "Mr. Owak", "Knoggelius", string.Empty, "Mario", "젠구리", "申史加拉", "申史加拉", };
        private static readonly string[] T7 = { string.Empty, "マニシ", "Exemann", "Koko-fan", "Exechiele", "Einrich", string.Empty, "Gunter", "마니시", "艾浩舒", "艾浩舒", };
        private static readonly string[] T8 = { string.Empty, "コツブ", "Higeo", "Montagnou", "George", "Karstein", string.Empty, "Georgie", "산돌", "科布", "科布", };

        internal static readonly EncounterTrade[] TradeGift_GG =
        {
            // Random candy values! They can be zero so no impact on legality even though statistically rare.
            new EncounterTrade7b { Species = 019, Level = 12, Form = 1, TrainerNames = T1, TID7 = 121106, OTGender = 1, Shiny = Shiny.Random, IVs = new[] {31,31,-1,-1,-1,-1}, IsNicknamed = false }, // Rattata @ Cerulean City, AV rand [0-5)
            new EncounterTrade7b { Species = 027, Level = 27, Form = 1, TrainerNames = T2, TID7 = 703019, OTGender = 0, Shiny = Shiny.Random, IVs = new[] {-1,31,31,-1,-1,-1}, IsNicknamed = false, Version = GameVersion.GP }, // Sandshrew @ Celadon City, AV rand [0-5)
            new EncounterTrade7b { Species = 037, Level = 27, Form = 1, TrainerNames = T2, TID7 = 703019, OTGender = 0, Shiny = Shiny.Random, IVs = new[] {-1,-1,-1,31,31,-1}, IsNicknamed = false, Version = GameVersion.GE }, // Vulpix @ Celadon City, AV rand [0-5)
            new EncounterTrade7b { Species = 050, Level = 25, Form = 1, TrainerNames = T3, TID7 = 520159, OTGender = 1, Shiny = Shiny.Random, IVs = new[] {-1,31,-1,31,-1,-1}, IsNicknamed = false }, // Diglett @ Lavender Town, AV rand [0-5)
            new EncounterTrade7b { Species = 052, Level = 44, Form = 1, TrainerNames = T4, TID7 = 000219, OTGender = 0, Shiny = Shiny.Random, IVs = new[] {31,-1,-1,31,-1,-1}, IsNicknamed = false, Version = GameVersion.GE }, // Meowth @ Cinnabar Island, AV rand [0-10)
            new EncounterTrade7b { Species = 088, Level = 44, Form = 1, TrainerNames = T4, TID7 = 000219, OTGender = 0, Shiny = Shiny.Random, IVs = new[] {31,31,-1,-1,-1,-1}, IsNicknamed = false, Version = GameVersion.GP }, // Grimer @ Cinnabar Island, AV rand [0-10)
            new EncounterTrade7b { Species = 026, Level = 30, Form = 1, TrainerNames = T5, TID7 = 940711, OTGender = 1, Shiny = Shiny.Random, IVs = new[] {-1,-1,-1,31,31,-1}, IsNicknamed = false }, // Raichu @ Saffron City, AV rand [0-10)
            new EncounterTrade7b { Species = 105, Level = 38, Form = 1, TrainerNames = T6, TID7 = 102595, OTGender = 0, Shiny = Shiny.Random, IVs = new[] {-1,31,31,-1,-1,-1}, IsNicknamed = false }, // Marowak @ Fuchsia City, AV rand [0-10)
            new EncounterTrade7b { Species = 103, Level = 46, Form = 1, TrainerNames = T7, TID7 = 060310, OTGender = 0, Shiny = Shiny.Random, IVs = new[] {-1,31,-1,-1,31,-1}, IsNicknamed = false }, // Exeggutor @ Indigo Plateau, AV rand [0-15)
            new EncounterTrade7b { Species = 074, Level = 16, Form = 1, TrainerNames = T8, TID7 = 551873, OTGender = 0, Shiny = Shiny.Random, IVs = new[] {31,31,-1,-1,-1,-1}, IsNicknamed = false }, // Geodude @ Vermilion City, AV rand [0-5)
        };

        private class RareSpawn
        {
            public readonly int Species;
            public readonly byte[] Locations;

            protected internal RareSpawn(int species, params byte[] locations)
            {
                Species = species;
                Locations = locations;
            }
        }

        private static readonly byte[] Sky = {003, 004, 005, 006, 009, 010, 011, 012, 013, 014, 015, 016, 017, 018, 019, 020, 021, 022, 023, 024, 025, 026, 027};

        private static readonly RareSpawn[] Rare =
        {
            // Normal
            new RareSpawn(001, 039),
            new RareSpawn(004, 005, 006, 041),
            new RareSpawn(007, 026, 027, 044),
            new RareSpawn(106, 045),
            new RareSpawn(107, 045),
            new RareSpawn(113, 007, 008, 010, 011, 012, 013, 014, 015, 016, 017, 018, 019, 020, 023, 025, 040, 042, 043, 045, 047, 051),
            new RareSpawn(137, 009),
            new RareSpawn(143, 046),

            // Water
            new RareSpawn(131, 021, 022),

            // Fly
            new RareSpawn(006, Sky),
            new RareSpawn(144, Sky),
            new RareSpawn(145, Sky),
            new RareSpawn(146, Sky),
            new RareSpawn(149, Sky),
        };

        private static void ManuallyAddRareSpawns(IEnumerable<EncounterArea7b> areas)
        {
            foreach (var table in areas)
            {
                var loc = table.Location;
                var species = Rare.Where(z => z.Locations.Contains((byte)loc)).Select(z => z.Species).ToArray();
                if (species.Length == 0)
                    continue;
                var slots = table.Slots;
                var first = slots[0];
                var extra = species
                    .Select(z => new EncounterSlot7b(table, z, (z == 006 || z >= 144) ? 03 : first.LevelMin, (z == 006 || z >= 144) ? 56 : first.LevelMax)).ToArray();

                int count = slots.Length;
                Array.Resize(ref slots, count + extra.Length);
                extra.CopyTo(slots, count);
                table.Slots = slots;
            }
        }

        internal static readonly EncounterStatic[] StaticGP = GetEncounters(Encounter_GG, GameVersion.GP);
        internal static readonly EncounterStatic[] StaticGE = GetEncounters(Encounter_GG, GameVersion.GE);
    }
}