//-----------------------------------------------------------------------
//-----------------------------------------------------------------------
//     file="ExpSchema.cs"
//     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 StgSharp.Collections;

using System;
using System.Collections.Generic;
using System.Text;

namespace StgSharp.Script.Express
{
    public class ExpSchema
    {
        private readonly ConcurrentStringHashMultiplexer _multiplexer = ExpCompile.Multiplexer;
        private Dictionary<string, ExpConstantCollectionSource> _constDict;
        private Dictionary<string, ExpEntitySource> _entityDict;
        private Dictionary<string, ExpFunctionSource> _functionDict;
        private Dictionary<string, ExpRuleSource> _ruleDict;
        private Dictionary<string, ExpSchema> _schemaInclude;
        private Dictionary<string, ExpTypeSource> _typeDict;

        public ExpSchema()
        {
            _constDict = new Dictionary<string, ExpConstantCollectionSource>(ExpCompile.Multiplexer);
            _entityDict = new Dictionary<string, ExpEntitySource>(ExpCompile.Multiplexer);
            _functionDict = new Dictionary<string, ExpFunctionSource>(ExpCompile.Multiplexer);
            _ruleDict = new Dictionary<string, ExpRuleSource>(ExpCompile.Multiplexer);
            _schemaInclude = new Dictionary<string, ExpSchema>(ExpCompile.Multiplexer);
            _typeDict = new Dictionary<string, ExpTypeSource>(ExpCompile.Multiplexer);
        }

        public string Name
        {
            get;
            internal set;
        }

        public ExpTypeSource GetExpType( string typeName )
        {
            if( ExpCompile.TryGetBuiltinType(
                typeName, out ExpTypeSource? ret ) ) {
                return ret;
            }
            if( _typeDict.TryGetValue( typeName, out ret ) ) {
                return ret;
            }
            foreach( ExpSchema item in _schemaInclude.Values ) {
                if( item._typeDict.TryGetValue( typeName, out ret ) ) {
                    return ret;
                }
            }
            throw new ExpTypeNotFoundException( typeName, this );
        }

        public bool HasSchemaInclude( ExpSchema schema )
        {
            return _schemaInclude.ContainsKey( schema.Name );
        }

        public bool TryGetConst(string name, out ExpElementInstanceBase constInstance)
        {
            if (ExpCompile.BuiltinConst.TryGetValue(name, out constInstance))
            {

            } 
        }

        public ExpToken SearchConstDeclare( string typeName )
        {
            ExpToken constant;
            foreach (var item in ExpCompile.BuiltinConst.Values)
            {

            }
            throw new KeyNotFoundException();
        }
    }
}