namespace HorizonRP;

/// <summary>
/// Un objet d'inventaire. Le poids est en kilos ; un objet « utilisable » est
/// consommé quand on l'utilise et rend de la faim ou de la vie.
/// Un Id ne se change plus une fois le serveur ouvert : il est enregistré dans
/// les inventaires des joueurs.
/// </summary>
public sealed record ItemDefinition(
	string Id,
	string Name,
	string Description,
	string Icon,
	string Category,
	float Weight,
	int MaxStack,
	int Price,
	string WorldModel,
	float Hunger = 0,
	float Health = 0,
	string UseMessage = null )
{
	public bool Usable => Hunger > 0 || Health > 0 || UseMessage is not null;

	/// <summary>
	/// L'image de la case : l'image du modèle (ModelThumbs), l'icône d'un
	/// accessoire, ou null quand l'objet n'a qu'un carton pour modèle (l'icône prend la place).
	/// </summary>
	public string Picture => WeaponItems.AccessoryOf( Id ) is { } accessory
		? WeaponRules.Accessory( accessory )?.Icon
		: string.IsNullOrEmpty( WorldModel ) || (WorldModel.Contains( "cardboardbox01" ) && Id != "carton") ? null : ModelThumbs.Of( WorldModel );
}

public static class Items
{
	/// <summary>
	/// Construite à la lecture, et reconstruite quand <see cref="Version"/> change : un
	/// champ statique garde sa valeur à travers les rechargements à chaud de l'éditeur.
	/// Monter la version à chaque retouche de la liste.
	/// </summary>
	public static IReadOnlyList<ItemDefinition> All
	{
		get
		{
			if ( all is null || builtVersion != Version )
			{
				all = Build();
				builtVersion = Version;
			}
			return all;
		}
	}

	const int Version = 4;
	static int builtVersion;
	static IReadOnlyList<ItemDefinition> all;

	static IReadOnlyList<ItemDefinition> Build() => new List<ItemDefinition>
	{
		// Nourriture
		new( "pain", "Bagel", "Un bagel au sésame, encore tiède.", "bakery_dining", "Nourriture", 0.25f, 10, 8, "models/citizen_props/chippacket01.vmdl", Hunger: 20 ),
		new( "sandwich", "Sandwich", "Jambon-beurre.", "lunch_dining", "Nourriture", 0.3f, 10, 25, "models/citizen_props/chippacket01.vmdl", Hunger: 40 ),
		new( "hotdog", "Hot-dog", "Le classique d'Union City.", "fastfood", "Nourriture", 0.3f, 10, 18, "models/citizen_props/hotdog01.vmdl", Hunger: 35 ),
		new( "glace", "Glace", "Un cornet vanille.", "icecream", "Nourriture", 0.2f, 5, 12, "models/citizen_props/icecreamcone01.vmdl", Hunger: 15 ),
		new( "soda", "Soda", "Une canette bien fraîche.", "local_drink", "Boisson", 0.35f, 10, 6, "models/citizen_props/sodacan01.vmdl", Hunger: 8 ),
		new( "cafe", "Café", "Pour tenir jusqu'à la fin du service.", "coffee", "Boisson", 0.3f, 5, 5, "models/citizen_props/coffeemug01.vmdl", Hunger: 5 ),

		// Soins
		new( "bandage", "Bandage", "Rend 15 points de vie.", "healing", "Soins", 0.1f, 10, 30, "models/citizen_props/cardboardbox01.vmdl", Health: 15 ),
		new( "trousse", "Trousse de soin", "Rend 50 points de vie.", "medical_services", "Soins", 1.2f, 3, 80, "models/citizen_props/cardboardbox01.vmdl", Health: 50 ),

		// Divers
		new( "journal", "Union City Times", "Le journal du jour.", "newspaper", "Divers", 0.2f, 5, 3, "models/citizen_props/newspaper01.vmdl", UseMessage: "Vous parcourez les gros titres du Union City Times." ),
		new( "pied_de_biche", "Pied-de-biche", "Lourd et utile. Rien de plus, pour l'instant.", "hardware", "Outils", 2.5f, 1, 150, "models/citizen_props/crowbar01.vmdl" ),
		new( "carton", "Carton", "Pour déménager… ou cacher quelque chose.", "inventory_2", "Divers", 1f, 5, 10, "models/citizen_props/cardboardbox01.vmdl" ),

		// Munitions : à la cartouche, comme sur FiveM ; le rechargement les prend ici.
		// <munitions> (outils/fas2/munitions.py)
		new( "munitions_9mm", "Munitions 9×19 mm", "Pistolets et pistolets-mitrailleurs (Glock, MP5, Uzi…).", "radio_button_checked", "Munitions", 0.012f, 250, 2, "models/swb/bullets/9mm/9mm.vmdl" ),
		new( "munitions_9x18", "Munitions 9×18 mm Makarov", "PM, PMM, OTs-33, PP-19 Bizon.", "radio_button_checked", "Munitions", 0.011f, 250, 2, "models/swb/bullets/9mm/9mm.vmdl" ),
		new( "munitions_45", "Munitions .45 ACP", "M1911, USP, UMP-45, Vector.", "radio_button_checked", "Munitions", 0.015f, 250, 3, "models/swb/bullets/9mm/9mm.vmdl" ),
		new( "munitions_357", "Munitions .357 Magnum", "Desert Eagle .357.", "radio_button_checked", "Munitions", 0.015f, 250, 3, "models/swb/bullets/9mm/9mm.vmdl" ),
		new( "munitions_50ae", "Munitions .50 AE", "Desert Eagle.", "radio_button_checked", "Munitions", 0.022f, 100, 6, "models/swb/bullets/9mm/9mm.vmdl" ),
		new( "munitions_454", "Munitions .454 Casull", "Raging Bull.", "radio_button_checked", "Munitions", 0.02f, 100, 6, "models/swb/bullets/9mm/9mm.vmdl" ),
		new( "munitions_57", "Munitions 5,7×28 mm", "FN P90.", "radio_button_checked", "Munitions", 0.006f, 250, 3, "models/swb/bullets/9mm/9mm.vmdl" ),
		new( "munitions_545", "Munitions 5,45×39 mm", "AK-74, AKS-74U, AN-94, AK-12.", "radio_button_checked", "Munitions", 0.011f, 250, 4, "models/swb/bullets/308/308.vmdl" ),
		new( "munitions_556", "Munitions 5,56×45 mm", "M4A1, M16A2, G36, AUG, FAMAS, M249…", "radio_button_checked", "Munitions", 0.012f, 250, 4, "models/swb/bullets/308/308.vmdl" ),
		new( "munitions_762", "Munitions 7,62×39 mm", "AK-47, AK-104, SKS, RPK, Sako RK 95.", "radio_button_checked", "Munitions", 0.016f, 250, 4, "models/swb/bullets/308/308.vmdl" ),
		new( "munitions_308", "Munitions 7,62×51 mm", "G3, FAL, M14, M24, M60, SR-25…", "radio_button_checked", "Munitions", 0.025f, 100, 6, "models/swb/bullets/308/308.vmdl" ),
		new( "munitions_762r", "Munitions 7,62×54 mmR", "SVD, Kar98k.", "radio_button_checked", "Munitions", 0.022f, 100, 7, "models/swb/bullets/308/308.vmdl" ),
		new( "munitions_9x39", "Munitions 9×39 mm", "VSS, AS Val, OTs-14.", "radio_button_checked", "Munitions", 0.023f, 100, 6, "models/swb/bullets/308/308.vmdl" ),
		new( "munitions_127", "Munitions 12,7×55 mm", "ASh-12.", "radio_button_checked", "Munitions", 0.06f, 60, 10, "models/swb/bullets/20mm/20mm.vmdl" ),
		new( "munitions_50bmg", "Munitions .50 BMG", "Barrett M82.", "radio_button_checked", "Munitions", 0.11f, 50, 15, "models/swb/bullets/20mm/20mm.vmdl" ),
		new( "munitions_12", "Cartouches calibre 12", "Fusils à pompe et à canons juxtaposés.", "radio_button_checked", "Munitions", 0.04f, 100, 4, "models/swb/bullets/12gauge/12gauge.vmdl" ),
		new( "munitions_23", "Cartouches 23 mm", "KS-23.", "radio_button_checked", "Munitions", 0.09f, 50, 8, "models/swb/bullets/12gauge/12gauge.vmdl" ),
		new( "munitions_40mm", "Grenades 40 mm explosives", "M79.", "radio_button_checked", "Munitions", 0.23f, 12, 60, "weapons/fas2/projectiles/m79_grenade.vmdl" ),
		new( "munitions_rpg7", "Roquette PG-7V", "RPG-7.", "radio_button_checked", "Munitions", 2.2f, 4, 400, "weapons/fas2/projectiles/rpg7_rocket.vmdl" ),
		new( "munitions_rpg26", "Roquette RPG-26", "Tube RPG-26 : une roquette par tube.", "radio_button_checked", "Munitions", 2.9f, 2, 600, "weapons/fas2/projectiles/rpg26_rocket.vmdl" ),
		new( "grenade_m67", "Grenade M67", "Grenade à fragmentation.", "radio_button_checked", "Munitions", 0.4f, 6, 150, "weapons/fas2/projectiles/m67_thrown.vmdl" ),
		new( "grenade_m84", "Grenade M84", "Grenade assourdissante : flash et sifflement, sans blesser.", "radio_button_checked", "Munitions", 0.24f, 6, 120, "weapons/fas2/projectiles/m84_thrown.vmdl" ),
		new( "grenade_m18", "Fumigène M18", "Un nuage de fumée épaisse, une demi-minute.", "radio_button_checked", "Munitions", 0.54f, 6, 60, "weapons/fas2/projectiles/m18_thrown.vmdl" ),
		new( "mine_claymore", "Mine Claymore M18A1", "Mine antipersonnel dirigée : elle part quand on passe devant.", "radio_button_checked", "Munitions", 1.6f, 3, 500, "weapons/fas2/projectiles/claymore.vmdl" ),
		// </munitions>
	};

	/// <summary>Un objet fixe, ou un prop du catalogue porté en poche (« prop:12 »).</summary>
	public static ItemDefinition Get( string id ) => All.FirstOrDefault( x => x.Id == id ) ?? PropItems.Get( id ) ?? WeaponItems.Get( id ) ?? VehicleKeys.Get( id );
}

/// <summary>Une case de l'inventaire.</summary>
public sealed class InventorySlot
{
	public int Slot { get; set; }
	public string Item { get; set; }
	public int Count { get; set; }

	/// <summary>Ce que l'objet garde avec lui (une arme : série, balles, accessoires) ; null pour le reste.</summary>
	public string Data { get; set; }

	// Calculés : ni enregistrés ni envoyés (la fiche entière partait avec chaque case).
	[System.Text.Json.Serialization.JsonIgnore] public ItemDefinition Definition => Items.Get( Item );
	[System.Text.Json.Serialization.JsonIgnore] public float Weight => (Definition?.Weight ?? 0) * Count;
}

/// <summary>Les règles de l'inventaire, communes à l'hôte et à l'interface.</summary>
public static class InventoryRules
{
	/// <summary>
	/// Les poches : cinq cases, aux touches 1 à 5. Le reste ira dans un sac à dos, plus
	/// tard, comme sur les serveurs FiveM. (La barre du HUD y ajoute « Mains », sans
	/// touche : tout ranger, ne rien tenir.)
	/// </summary>
	public const int Slots = 5;

	/// <summary>Les poches qui se servent au clavier : toutes.</summary>
	public const int HotbarSlots = 5;

	/// <summary>La touche d'une poche : 1 pour la première.</summary>
	public static string KeyOf( int pocket ) => $"Slot{pocket + 1}";

	public const float MaxWeight = 30f;

	public static float WeightOf( IEnumerable<InventorySlot> slots ) => slots.Sum( x => x.Weight );
}