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 = GetEncounterTables<EncounterArea7b>("gg", "gp");
        internal static readonly EncounterArea7b[] SlotsGE = GetEncounterTables<EncounterArea7b>("gg", "ge");
        internal static readonly EncounterStatic[] StaticGP, StaticGE;
        internal static readonly EncounterArea7g[] SlotsGO_GG = GetGoParkArea();

        static Encounters7b()
        {
            StaticGP = GetStaticEncounters(Encounter_GG, GameVersion.GP);
            StaticGE = GetStaticEncounters(Encounter_GG, GameVersion.GE);

            ManuallyAddRareSpawns(SlotsGP);
            ManuallyAddRareSpawns(SlotsGE);
            SlotsGP.SetVersion(GameVersion.GP);
            SlotsGE.SetVersion(GameVersion.GE);
            Encounter_GG.SetVersion(GameVersion.GG);
            TradeGift_GG.SetVersion(GameVersion.GG);
            MarkEncountersGeneration(7, SlotsGP, SlotsGE);
            MarkEncountersGeneration(7, StaticGP, StaticGE, TradeGift_GG);
        }

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

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

            // unused new EncounterStatic { Species = 133, Level = 30, Location = 34, Gift = true }, // Eevee @ Celadon City
            new EncounterStatic { Species = 131, Level = 34, Location = 52, Gift = true, IVs = new[] {31,25,25,25,30,30} }, // Lapras @ Saffron City (Silph Co. Employee, inside)
            new EncounterStatic { Species = 106, Level = 30, Location = 38, Gift = true, IVs = new[] {25,30,25,31,25,30} }, // Hitmonlee @ Saffron City (Karate Master)
            new EncounterStatic { Species = 107, Level = 30, Location = 38, Gift = true, IVs = new[] {25,31,30,25,25,30} }, // Hitmonchan @ Saffron City (Karate Master)
            new EncounterStatic { Species = 140, Level = 44, Location = 36, Gift = true, FlawlessIVCount = 3 }, // Kabuto @ Cinnabar Island (Cinnabar Pokémon Lab)
            new EncounterStatic { Species = 138, Level = 44, Location = 36, Gift = true, FlawlessIVCount = 3 }, // Omanyte @ Cinnabar Island (Cinnabar Pokémon Lab)
            new EncounterStatic { Species = 142, Level = 44, Location = 36, Gift = true, FlawlessIVCount = 3 }, // Aerodactyl @ Cinnabar Island (Cinnabar Pokémon Lab)
            new EncounterStatic { Species = 001, Level = 12, Location = 31, Gift = true, IVs = new[] {31,25,30,25,25,30} }, // Bulbasaur @ Cerulean City
            new EncounterStatic { Species = 004, Level = 14, Location = 26, Gift = true, IVs = new[] {25,30,25,31,30,25} }, // Charmander @ Route 24
            new EncounterStatic { Species = 007, Level = 16, Location = 33, Gift = true, IVs = new[] {25,25,30,25,31,30} }, // Squirtle @ Vermillion City
            new EncounterStatic { Species = 137, Level = 34, Location = 38, Gift = true, IVs = new[] {25,25,30,25,31,30} }, // Porygon @ Saffron City (Silph Co. Employee, outside)
            new EncounterStatic { 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 EncounterStatic { 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 EncounterTrade { 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 EncounterTrade { 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 EncounterTrade { 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 EncounterTrade { 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 EncounterTrade { 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 EncounterTrade { 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 EncounterTrade { 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 EncounterTrade { 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 EncounterTrade { 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 EncounterTrade { 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 static EncounterArea7g[] GetGoParkArea()
        {
            var area = new EncounterArea7g { Location = 50 };
            EncounterSlot GetSlot(int species, int form)
            {
                return new EncounterSlot
                {
                    Area = area,
                    Generation = 7,
                    Species = species,
                    LevelMin = 1,
                    LevelMax = 40,
                    Form = form,
                    Type = SlotType.GoPark,
                    Version = GameVersion.GO,
                };
            }

            var obtainable = Enumerable.Range(1, 150).Concat(Enumerable.Range(808, 2)); // count : 152
            var AlolanKanto = new byte[]
            {
                // Level 1+
                019, // Rattata
                020, // Raticate
                027, // Sandshrew
                028, // Sandslash
                037, // Vulpix
                038, // Ninetales
                050, // Diglett
                051, // Dugtrio
                052, // Meowth
                053, // Persian
                074, // Geodude
                075, // Graveler
                076, // Golem
                088, // Grimer
                089, // Muk
                103, // Exeggutor

                // Level 20+
                026, // Raichu
                105, // Marowak
            };

            var regular = obtainable.Select(z => GetSlot(z, 0));
            var alolan = AlolanKanto.Select(z => GetSlot(z, 1));
            var slots = regular.Concat(alolan).ToArray();

            slots[slots.Length - 2].LevelMin = 20; // Raichu
            slots[slots.Length - 1].LevelMin = 20; // Marowak
            slots[(int)Species.Mewtwo - 1].LevelMin = 20;
            slots[(int)Species.Articuno - 1].LevelMin = 15;
            slots[(int)Species.Zapdos - 1].LevelMin = 15;
            slots[(int)Species.Moltres - 1].LevelMin = 15;

            area.Slots = slots;
            return new[] {area};
        }

        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<EncounterArea> 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 EncounterSlot
                    {
                        Area = table,
                        Species = z,
                        LevelMin = (z == 006 || z >= 144) ? 03 : first.LevelMin,
                        LevelMax = (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;
            }
        }
    }
}