// <copyright file="PlayerState.cs" company="MUnique">
// Licensed under the MIT License. See LICENSE file in the project root for full license information.
// </copyright>

namespace MUnique.OpenMU.GameLogic;

/// <summary>
/// The states of a player, used by the <see cref="ITrader.PlayerState"/>.
/// </summary>
public static class PlayerState
{
    static PlayerState()
    {
        TradeButtonPressed = new State(new Guid("706A9618-1C31-4357-8C1A-0AA71B4E89E9"))
        {
            Name = "Trade Button Pressed",
            PossibleTransitions = new List<State>
            {
                Disconnected,
                EnteredWorld,
            },
        };
        TradeOpened = new State(new Guid("F4367C99-1F11-4D42-9ADF-AD4655F022A0"))
        {
            Name = "Trade Opened",
            PossibleTransitions = new List<State>
            {
                Disconnected,
                Dead,
                EnteredWorld,
                TradeButtonPressed,
            },
        };
        TradeButtonPressed.PossibleTransitions.Add(TradeOpened);
        TradeRequested = new State(new Guid("E15623A1-D125-4327-AE6A-9F36C5744BC0"))
        {
            Name = "Trade Requested",
            PossibleTransitions = new List<State>
            {
                Disconnected,
                TradeOpened,
                EnteredWorld,
            },
        };
        EnteredWorld.PossibleTransitions!.Add(TradeRequested);
        NpcDialogOpened = new State(new Guid("B0DFD9AC-009C-496C-A1B9-C8D6C6BFE23F"))
        {
            Name = "NPC Dialog Opened",
            PossibleTransitions = new List<State>
            {
                Disconnected,
                EnteredWorld,
            },
        };
        EnteredWorld.PossibleTransitions.Add(NpcDialogOpened);
        PartyRequest = new State(new Guid("FD96D6EC-88F3-4B0C-ADFB-D5DDF1554C48"))
        {
            Name = "Party Requested",
            PossibleTransitions = new List<State>
            {
                Disconnected,
                EnteredWorld,
            },
        };
        EnteredWorld.PossibleTransitions.Add(PartyRequest);
        GuildRequest = new State(new Guid("B8C69D28-4CEF-45CE-9D11-37576A97E116"))
        {
            Name = "Guild Requested",
            PossibleTransitions = new List<State>
            {
                Disconnected,
                EnteredWorld,
            },
        };
        EnteredWorld.PossibleTransitions.Add(GuildRequest);

        EnteredWorld.PossibleTransitions.Add(PlayerState.Dead);

        EnteredWorld.PossibleTransitions.Add(PlayerState.CharacterSelection);
    }

    /// <summary>
    /// Gets the finished state. When this state is active, the player session was saved and the player object can be safely removed from the game.
    /// </summary>
    public static State Finished { get; } = new(new Guid("AB24C7C4-4F37-40ED-B874-0F6C7984C471"))
    {
        Name = "Finished",
    };

    /// <summary>
    /// Gets the disconnected state. When this state is active, the player disconnected from the game, but his session is not saved yet.
    /// </summary>
    public static State Disconnected { get; } = new(new Guid("DE145F30-9A3A-4895-8B15-4F34F7D203F0"))
    {
        Name = "Disconnected",
        PossibleTransitions = new List<State>
        {
            Finished,
        },
    };

    /// <summary>
    /// Gets the entered world state. When this state is active, the player entered the world with one of his characters.
    /// </summary>
    public static State EnteredWorld { get; } = new(new Guid("83005EA6-7398-4D21-A51E-1E77B85CF6F0"))
    {
        Name = "Entered World",
        PossibleTransitions = new List<State>
        {
            Disconnected,
        },
    };

    /// <summary>
    /// Gets the dead state. When this state is active, the player has been killed with one of his characters.
    /// </summary>
    public static State Dead { get; } = new(new Guid("171CBF68-EE19-4C99-8B89-AA8A51AE9876"))
    {
        Name = "Dead",
        PossibleTransitions = new List<State>
        {
            Disconnected,
            EnteredWorld,
        },
    };

    /// <summary>
    /// Gets the character selection state. When this state is active, the character selection screen is shown.
    /// </summary>
    public static State CharacterSelection { get; } = new(new Guid("6EB2A8EA-1B86-4622-A513-18EB8F3FE512"))
    {
        Name = "Character Selection Screen",
        PossibleTransitions = new List<State>
        {
            Disconnected,
            EnteredWorld,
        },
    };

    /// <summary>
    /// Gets the authenticated state. When this state is active, the player has been successfully authenticated.
    /// </summary>
    public static State Authenticated { get; } = new(new Guid("4D1D2157-E2BB-48EF-9F19-E1892AC49E84"))
    {
        Name = "Authenticated",
        PossibleTransitions = new List<State>
        {
            Disconnected,
            CharacterSelection,
        },
    };

    /// <summary>
    /// Gets the login screen state. When this state is active, the login screen is shown to the player.
    /// </summary>
    public static State LoginScreen { get; } = new(new Guid("C59E7072-306F-47BF-A5A0-1C9DA38143C3"))
    {
        Name = "Login Screen",
        PossibleTransitions = new List<State>
        {
            Disconnected,
            Authenticated,
        },
    };

    /// <summary>
    /// Gets the initial state.
    /// </summary>
    public static State Initial { get; } = new(new Guid("D93BC463-810F-46B9-A9F3-8592A055705D"))
    {
        Name = "Initial State",
        PossibleTransitions = new List<State>
        {
            LoginScreen,
        },
    };

    /// <summary>
    /// Gets the changing map state.
    /// </summary>
    public static State ChangingMap { get; } = new(new Guid("FF660582-460C-4B69-9D99-F5EB156E83B9"))
    {
        Name = "Changing Map",
        PossibleTransitions = new List<State>
        {
            Disconnected,
            EnteredWorld,
        },
    };

    /// <summary>
    /// Gets the trade requested state. When this state is active, a player got requested by another player to open a trade.
    /// </summary>
    public static State TradeRequested { get; }

    /// <summary>
    /// Gets the trade opened state. When this state is active, the player has a trade going on.
    /// </summary>
    public static State TradeOpened { get; }

    /// <summary>
    /// Gets the trade button pressed state. When this state is active, the player pressed its trade button to close his trade.
    /// </summary>
    public static State TradeButtonPressed { get; }

    /// <summary>
    /// Gets the Monster dialog opened state. When this state is active, the player has opened a Monster dialog.
    /// </summary>
    public static State NpcDialogOpened { get; }

    /// <summary>
    /// Gets the party request state. When this state is active, the player has requested for party.
    /// </summary>
    public static State PartyRequest { get; }

    /// <summary>
    /// Gets the guild request state. When this state is active, the player has requested for guild.
    /// TODO: set this state.
    /// </summary>
    public static State GuildRequest { get; }

    /// <summary>
    /// Determines whether the state is <see cref="Disconnected"/> or <see cref="Finished"/>.
    /// </summary>
    /// <param name="state">The state.</param>
    /// <returns>
    ///   <c>true</c> if the state is <see cref="Disconnected"/> or <see cref="Finished"/>; otherwise, <c>false</c>.
    /// </returns>
    public static bool IsDisconnectedOrFinished(this State state)
    {
        return state == Disconnected || state == Finished;
    }
}