#include "ast.h"
#include <stdexcept>
#include <iostream>
#include <QString>
#include <clasplayer.h>

using namespace std;

namespace xreate{

TypeAnnotation::TypeAnnotation()
{
}

TypeAnnotation::TypeAnnotation(const Atom<Type_t> &typ)
    : __value(typ.get())
{
    ;
}

TypeAnnotation::TypeAnnotation (TypePrimitive typ)
    : __value(typ)
{}

TypeAnnotation::TypeAnnotation(TypeOperator op, std::initializer_list<TypeAnnotation> operands)
    : __operator(op), __operands(operands)
{

}

TypeAnnotation::TypeAnnotation (llvm_array_tag, TypePrimitive typ, int size)
    :TypeAnnotation(TypeOperator::LIST, {typ})
{
    __size=size;
}
/*
TypeAnnotation (struct_tag, std::initializer_list<TypeAnnotation>)
{}
*/

llvm::Type*
TypeAnnotation::toLLVMType()
{
    switch (__operator)
    {
        case TypeOperator::LIST:
        {
            assert(__operands.size());
            TypeAnnotation elTy = __operands.at(0);

            return llvm::ArrayType::get(elTy.toLLVMType(), __size);
        }

        case TypeOperator::NONE: {
            switch (__value) {
                case TypePrimitive::Bool:
                    return llvm::Type::getInt1Ty(llvm::getGlobalContext());

                case TypePrimitive::Int:
                case TypePrimitive::i32:
                case TypePrimitive::Num:
                    return llvm::Type::getInt32Ty(llvm::getGlobalContext());

                case TypePrimitive::Float:
                    return llvm::Type::getDoubleTy(llvm::getGlobalContext());

                default:
                    assert(false);
            }
        }

        default:
            assert(false);
    }

    assert(false);
    return  nullptr;
}



Expression::Expression(const Atom<Number_t>& number)
: __state(NUMBER), __op(Operator::NONE), __valueD(number.get())
{
}

Expression::Expression(const Atom<Identifier_t> &ident)
    : __state(IDENT), __op(Operator::NONE), __valueS(ident.get())
{
}

Expression::Expression(const Operator &op, std::initializer_list<Expression> params)
    : __state(COMPOUND), __op(op)
{
    if (op == Operator::CALL || op == Operator::INDEX)
    {
        assert(params.size() > 0);
        Expression arg = *params.begin();

        assert(arg.__state == Expression::IDENT);
        __valueS = std::move(arg.__valueS);
        return;
    }

    operands.insert(operands.end(), params);
}

void
Expression::setOp(Operator op)
{
    __op = op;

    switch (op)
    {
        case Operator::NONE:
            __state = INVALID;
            break;

        default:
            __state = COMPOUND;
            break;
    }
}

void
Expression::addArg(Expression &&arg)
{
    operands.push_back(arg);
}

void
Expression::addBindings(std::initializer_list<Atom<Identifier_t>> params)
{
    bindings.insert(bindings.end(), params);
}

void
Expression::addBlock(CodeScope&& scope)
{
    blocks.push_back(scope);
}

const std::vector<Expression>&
Expression::getOperands() const
{
    return operands;
}

double
Expression::getValueDouble() const
{
    return __valueD;
}

const std::string&
Expression::getValueString() const
{
    return __valueS;
}




Expression::Expression()
    : __op(Operator::NONE), __state(INVALID)
{}


AST::AST()
{
}

void
AST::add(Function &f)
{
    __functions.push_back(f);
    __indexFunctions[f.getName()] = __functions.size()-1;
}

void
AST::add(MetaRuleAbstract *r)
{
    __rules.push_back(unique_ptr<MetaRuleAbstract>(r));
}

std::string
AST::getModuleName()
{
    const std::string name = "moduleTest";

    return name;
}

FID
AST::getFunctionsCount() const
{
    return __functions.size();
}

const Function&
AST::getFunctionById(FID id)const
{
    assert(id>=0 && id < __functions.size());
    return __functions[id];
}

void
AST::run(LLVMLayer &l)
{
    llvm::PassManager PM;
    PM.add(llvm::createPrintModulePass(llvm::outs()));
    PM.run(*l.module);
}

Function::Function(const Atom<Identifier_t>& name)
{
    __name = name.get();
}

void
Function::addTag(Expression&& tag, const TagModifier mod)
{
    __tags.emplace_back(tag, mod);
}

const std::vector<Tag>&
Function::getAnnotations() const
{
    return __tags;
}

const CodeScope&
Function::getEntryScope() const
{
    return __entry;
}

CodeScope&
Function::getEntryScope()
{
    return __entry;
}

void
Function::setEntryScope(CodeScope&& scope)
{
    __entry = scope;
}

void
CodeScope::addArg(Atom <Identifier_t>&& name, TypeAnnotation&& typ)
{
    VID id = registerVar(std::move(const_cast<std::string&>(name.get())), std::move(typ));
    __args.push_back(name.get());
}

     ;

void
Function::addArg(Atom <Identifier_t>&& name, TypeAnnotation&& typ)
{
    __entry.addArg(move(name), move(typ));
}

void
Function::setReturnType(const TypeAnnotation &rtyp)
{
    __retType = rtyp;
}

const std::string&
Function::getName() const
{
    return __name;
}

CodeScope::CodeScope()
{

}

VID
CodeScope::registerVar(std::string&& name, TypeAnnotation &&typ)
{
    __vartable[name] = ++__vCounter;
    __definitions[__vCounter] = typ;

    return  __vCounter;
}

void
CodeScope::bindArg(llvm::Value* var, std::string&& name)
{
    assert(__vartable.count(name));
    VID id = __vartable.at(name);
    __rawVars[id] = var;
}

void
CodeScope::addDeclaration(const Atom <Identifier_t> &&name, TypeAnnotation &&typ, Expression&& body)
{
    VID id  = registerVar(std::move(const_cast<string&>(name.get())), move(typ));
    __declarations[id] = body;
}

void
CodeScope::setBody(const Expression &body)
{
    __body = body;
}

llvm::Value*
CodeScope::findSymbol(const std::string &name, LLVMLayer &l)
{
        //search var in current block
    if (__vartable.count(name))
    {
        VID vId = __vartable.at(name);

            //search in already compiled vars
        if (__rawVars.count(vId))
        {
            return __rawVars.at(vId);
        }

        //search in ordinary decls
        if (__declarations.count(vId)){
            const Expression& e = __declarations.at(vId);

            llvm::Value* result = compileExpression(e, l, &name);
            __rawVars[vId] = result;
            return result;
        }
    }

        //search in parent scope
    if (__parent)
    {
        return __parent->findSymbol(name, l);
    }

        //exception: Ident not found
    assert(false);
}




void
RuleArguments::add(const Atom<Identifier_t> &arg, DomainAnnotation typ)
{
    emplace_back(arg.get(), typ);
}

void
RuleGuards::add(Expression&& e)
{
    push_back(e);
}

MetaRuleAbstract::
MetaRuleAbstract(RuleArguments&& args, RuleGuards&& guards)
    : __args(std::move(args)), __guards(std::move(guards))
{}

MetaRuleAbstract::~MetaRuleAbstract(){}

RuleWarning::
RuleWarning(RuleArguments&& args, RuleGuards&& guards, Expression&& condition, Atom<String_t>&& message)
    : MetaRuleAbstract(std::move(args), std::move(guards)), __condition(condition), __message(message.get())
{}

RuleWarning::~RuleWarning(){}

void
RuleWarning::compile(ClaspLayer& layer)
{
    layer.addRuleWarning(*this);
}
}