//-----------------------------------------------------------------------
// -----------------------------------------------------------------------
// file="DefaultSchema"
// Project: StgSharp
// AuthorGroup: Nitload Space
// Copyright (c) Nitload Space. All rights reserved.
//     
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//     
// -----------------------------------------------------------------------
// -----------------------------------------------------------------------
using System;
using System.Collections;
using System.Collections.Frozen;
using System.Collections.Generic;
using System.Linq;

using static StgSharp.Script.Express.ExpressCompile;

namespace StgSharp.Script.Express
{
    public sealed partial class ExpSchema_Builtin : ExpSchema
    {

        private static readonly ExpSchema_Builtin _onlyInstance = new ExpSchema_Builtin();

        private ExpSchema_Builtin()
            : base()
        {
            Name = "Nitload";
        }

        internal static ExpSchema_Builtin Only
        {
            get => _onlyInstance;
        }

        public override void LoadFromSource(ExpSchemaSource source)
        {
            return;
        }

        public override bool TryGetConst(string name, out ExpElementInstance c)
        {
            return ConstDict.TryGetValue(name, out c);
        }

        public override bool TryGetEntity(string name, out ExpEntitySource e)
        {
            e = null;
            return false;
        }

        public override bool TryGetFunction(string name, out ExpFunctionSource f)
        {
            return FunctionDict.TryGetValue(name, out f!);
        }

        public override bool TryGetProcedure(string name, out ExpProcedureSource p)
        {
            return ProcedureDict.TryGetValue(name, out p!);
        }

        public override bool TryGetRule(string name, out ExpRuleSource r)
        {
            r = null!;
            return false;
        }

        public override bool TryGetSchemaInclude(string name, out ExpSchema include)
        {
            include = null!;
            return false;
        }

        public override bool TryGetType(string name, out ExpTypeSource t)
        {
            return TypeDict.TryGetValue(name, out t);
        }

        internal void Init()
        {
            IEnumerable<KeyValuePair<string, ExpTypeSource>> builtinTypeSource = [ new KeyValuePair<string, ExpTypeSource>(
                PoolString(Keyword.Integer),
                new ExpBuiltinType(Keyword.Integer, typeof(int))), new KeyValuePair<string, ExpTypeSource>(
                PoolString(Keyword.Real), new ExpBuiltinType(Keyword.Real, typeof(float))), new KeyValuePair<string, ExpTypeSource>(
                PoolString(Keyword.Boolean),
                new ExpBuiltinType(Keyword.Boolean, typeof(bool))), new KeyValuePair<string, ExpTypeSource>(
                PoolString(Keyword.Logical),
                new ExpBuiltinType(Keyword.Logical, typeof(ExpLogic))), new KeyValuePair<string, ExpTypeSource>(
                PoolString(Keyword.String),
                new ExpBuiltinType(Keyword.String, typeof(string))), new KeyValuePair<string, ExpTypeSource>(
                PoolString(Keyword.Binary),
                new ExpBuiltinType(Keyword.Binary, typeof(BitArray))), ];
            TypeDict = new Dictionary<string, ExpTypeSource>(builtinTypeSource,
                                                              Multiplexer).ToFrozenDictionary();


            ConstDict = new Dictionary<string, ExpElementInstance>(Multiplexer) {
                { PoolString("PI"), new ExpRealNumberNode(
                    new Token(PoolString("PI"), -1, -1, TokenFlag.Number), MathF.PI, true) },
                { PoolString("E"), new ExpRealNumberNode(
                    new Token(PoolString("E"), -1, -1, TokenFlag.Number), MathF.E, true) },
            }.ToFrozenDictionary();
        }

    }
}