#ifdef TESTS_BUILD
#include <catch.hpp>
#include "../../src/Parser/Parser.hpp"

TEST_CASE( "Parse single true keyword", "[parser]" ) {
    vector<IToken*> v {new SimpleToken(TokenKind::TrueKeyword,0,0), new SimpleToken(TokenKind::EndOfFile,0,0)};
    Parser parser = Parser(v, nullptr);
    auto parsedStatements = parser.Parse() -> GetStatements();
    REQUIRE(parsedStatements.size() == 1);
    auto firstStatement = parsedStatements[0];
    REQUIRE(firstStatement -> GetKind() == ParsedStatementKind::Expression);
    auto expression = ((ParsedExpressionStatement*)firstStatement)->GetExpression();
    REQUIRE(expression -> GetKind() == ParsedExpressionKind::LiteralBool);
    auto boolean = ((LiteralBoolExpression*)expression);
    REQUIRE(boolean->GetValue() == true);
}

TEST_CASE( "Parse single false keyword", "[parser]" ) {
    vector<IToken*> v {new SimpleToken(TokenKind::FalseKeyword,0,0), new SimpleToken(TokenKind::EndOfFile,0,0)};
    Parser parser = Parser(v, nullptr);
    auto parsedStatements = parser.Parse() -> GetStatements();
    REQUIRE(parsedStatements.size() == 1);
    auto firstStatement = parsedStatements[0];
    REQUIRE(firstStatement -> GetKind() == ParsedStatementKind::Expression);
    auto expression = ((ParsedExpressionStatement*)firstStatement)->GetExpression();
    REQUIRE(expression -> GetKind() == ParsedExpressionKind::LiteralBool);
    auto boolean = ((LiteralBoolExpression*)expression);
    REQUIRE(boolean->GetValue() == false);
}

TEST_CASE( "Parse simple addition", "[parser]" ) {
    vector<IToken*> v {
            new IntegerToken(5, 0, 0),
            new SimpleToken(TokenKind::PlusToken,0,0),
            new IntegerToken(10, 0, 0),
            new SimpleToken(TokenKind::EndOfFile,0,0)
    };
    Parser parser = Parser(v, nullptr);
    auto parsedStatements = parser.Parse() -> GetStatements();
    REQUIRE(parsedStatements.size() == 1);
    auto firstStatement = parsedStatements[0];
    REQUIRE(firstStatement -> GetKind() == ParsedStatementKind::Expression);
    auto expression = ((ParsedExpressionStatement*)firstStatement)->GetExpression();
    REQUIRE(expression -> GetKind() == ParsedExpressionKind::Binary);
    auto binary = ((BinaryExpression*)expression);
    CHECK(binary -> GetOperatorKind() == BinaryOperatorKind::Addition);
    auto left = binary->GetLeft();
    auto right = binary->GetRight();
    REQUIRE(left->GetKind() == ParsedExpressionKind::LiteralInteger);
    REQUIRE(right->GetKind() == ParsedExpressionKind::LiteralInteger);
    CHECK(((LiteralIntegerExpression*)left)->GetValue() == 5);
    CHECK(((LiteralIntegerExpression*)right)->GetValue() == 10);
}

TEST_CASE( "Parse simple negation", "[parser]" ) {
    vector<IToken*> v {
            new SimpleToken(TokenKind::MinusToken,0,0),
            new IntegerToken(10, 0, 0),
            new SimpleToken(TokenKind::EndOfFile,0,0)
    };
    Parser parser = Parser(v, nullptr);
    auto parsedStatements = parser.Parse() -> GetStatements();
    REQUIRE(parsedStatements.size() == 1);
    auto firstStatement = parsedStatements[0];
    REQUIRE(firstStatement -> GetKind() == ParsedStatementKind::Expression);
    auto expression = ((ParsedExpressionStatement*)firstStatement)->GetExpression();
    REQUIRE(expression -> GetKind() == ParsedExpressionKind::Unary);
    auto unary = ((UnaryExpression*)expression);
    CHECK(unary -> GetOperatorKind() == UnaryOperatorKind::Negation);
    auto operand = unary->GetOperand();
    REQUIRE(operand->GetKind() == ParsedExpressionKind::LiteralInteger);
    CHECK(((LiteralIntegerExpression*)operand)->GetValue() == 10);
}

TEST_CASE( "Parse logical negation", "[parser]" ) {
    vector<IToken*> v {
            new SimpleToken(TokenKind::NotKeyword,0,0),
            new SimpleToken(TokenKind::FalseKeyword,0,0),
            new SimpleToken(TokenKind::EndOfFile,0,0)
    };
    Parser parser = Parser(v, nullptr);
    auto parsedStatements = parser.Parse() -> GetStatements();
    REQUIRE(parsedStatements.size() == 1);
    auto firstStatement = parsedStatements[0];
    REQUIRE(firstStatement -> GetKind() == ParsedStatementKind::Expression);
    auto expression = ((ParsedExpressionStatement*)firstStatement)->GetExpression();
    REQUIRE(expression -> GetKind() == ParsedExpressionKind::Unary);
    auto unary = ((UnaryExpression*)expression);
    CHECK(unary -> GetOperatorKind() == UnaryOperatorKind::LogicalNegation);
    auto operand = unary->GetOperand();
    REQUIRE(operand->GetKind() == ParsedExpressionKind::LiteralBool);
    CHECK(((LiteralBoolExpression*)operand)->GetValue() == false);
}

TEST_CASE( "Are parenthesized expressions valid", "[parser]" ) {
    vector<IToken*> v {
            new IntegerToken(5, 0, 0),
            new SimpleToken(TokenKind::PlusToken,0,0),
            new IntegerToken(10, 0, 0),
            new SimpleToken(TokenKind::StarToken,0,0),
            new IntegerToken(6, 0, 0),
            new SimpleToken(TokenKind::EndOfFile,0,0)
    };
    Parser parser = Parser(v, nullptr);
    auto parsedStatements = parser.Parse() -> GetStatements();
    REQUIRE(parsedStatements.size() == 1);
    auto firstStatement = parsedStatements[0];
    REQUIRE(firstStatement -> GetKind() == ParsedStatementKind::Expression);
    auto expression = ((ParsedExpressionStatement*)firstStatement)->GetExpression();
    REQUIRE(expression -> GetKind() == ParsedExpressionKind::Binary);
    auto binary = ((BinaryExpression*)expression);
    CHECK(binary -> GetOperatorKind() == BinaryOperatorKind::Addition);
    auto left = binary->GetLeft();
    auto right = binary->GetRight();
    REQUIRE(left->GetKind() == ParsedExpressionKind::LiteralInteger);
    REQUIRE(right->GetKind() == ParsedExpressionKind::Binary);
    CHECK(((LiteralIntegerExpression*)left)->GetValue() == 5);
    left = ((BinaryExpression*)right)->GetLeft();
    right = ((BinaryExpression*)right)->GetRight();
    CHECK(((LiteralIntegerExpression*)left)->GetValue() == 10);
    CHECK(((LiteralIntegerExpression*)right)->GetValue() == 6);
}

TEST_CASE( "Assert binary precedence", "[parser]" ) {
    vector<IToken*> v {
            new SimpleToken(TokenKind::OpenParenthesis,0,0),
            new IntegerToken(10, 0, 0),
            new SimpleToken(TokenKind::CloseParenthesis,0,0),
            new SimpleToken(TokenKind::EndOfFile,0,0)
    };
    Parser parser = Parser(v, nullptr);
    auto parsedStatements = parser.Parse() -> GetStatements();
    REQUIRE(parsedStatements.size() == 1);
    auto firstStatement = parsedStatements[0];
    REQUIRE(firstStatement -> GetKind() == ParsedStatementKind::Expression);
    auto expression = ((ParsedExpressionStatement*)firstStatement)->GetExpression();
    REQUIRE(expression -> GetKind() == ParsedExpressionKind::Parenthesized);
    auto innerExpression = ((ParenthesizedExpression*)expression) -> GetInnerExpression();
    REQUIRE(innerExpression -> GetKind() == ParsedExpressionKind::LiteralInteger);
}

TEST_CASE( "Parse String Tokens", "[parser]" ) {
    vector<IToken*> v {new StringToken("foo bar", 0,0), new SimpleToken(TokenKind::EndOfFile,0,0)};
    Parser parser = Parser(v, nullptr);
    auto parsedStatements = parser.Parse() -> GetStatements();
    REQUIRE(parsedStatements.size() == 1);
    auto firstStatement = parsedStatements[0];
    REQUIRE(firstStatement -> GetKind() == ParsedStatementKind::Expression);
    auto expression = ((ParsedExpressionStatement*)firstStatement)->GetExpression();
    REQUIRE(expression -> GetKind() == ParsedExpressionKind::LiteralString);
    auto boolean = ((LiteralStringExpression*)expression);
    REQUIRE(boolean->GetValue() == "foo bar");
}

TEST_CASE( "Parse Global Assignment", "[parser]" ) {
    vector<IToken*> v {
            new IdentifierToken("foo",0,0),
            new SimpleToken(TokenKind::AssignmentToken,0,0),
            new SimpleToken(TokenKind::TrueKeyword,0,0),
            new SimpleToken(TokenKind::EndOfFile,0,0)
        };
    Parser parser = Parser(v, nullptr);
    auto parsedStatements = parser.Parse() -> GetStatements();
    REQUIRE(parsedStatements.size() == 1);
    auto firstStatement = parsedStatements[0];
    REQUIRE(firstStatement -> GetKind() == ParsedStatementKind::Assignment);
    auto assignment = (ParsedAssignmentStatement*)firstStatement;
    REQUIRE(!assignment -> IsLocal());
    REQUIRE(assignment->GetIdentifier().GetHash() == HashedString("foo").GetHash());
    REQUIRE(((LiteralBoolExpression*)assignment->GetExpression()) -> GetValue());
}

TEST_CASE( "Parse local Assignment", "[parser]" ) {
    vector<IToken*> v {
            new SimpleToken(TokenKind::LocalKeyword,0,0),
            new IdentifierToken("foo",0,0),
            new SimpleToken(TokenKind::AssignmentToken,0,0),
            new SimpleToken(TokenKind::TrueKeyword,0,0),
            new SimpleToken(TokenKind::EndOfFile,0,0)
    };
    Parser parser = Parser(v, nullptr);
    auto parsedStatements = parser.Parse() -> GetStatements();
    REQUIRE(parsedStatements.size() == 1);
    auto firstStatement = parsedStatements[0];
    REQUIRE(firstStatement -> GetKind() == ParsedStatementKind::Assignment);
    auto assignment = (ParsedAssignmentStatement*)firstStatement;
    REQUIRE(assignment -> IsLocal());
    REQUIRE(assignment->GetIdentifier().GetHash() == HashedString("foo").GetHash());
    REQUIRE(((LiteralBoolExpression*)assignment->GetExpression()) -> GetValue());
}

TEST_CASE( "Parse function declaration", "[parser]" ){
    vector<IToken*> v {
            new SimpleToken(TokenKind::FunctionKeyword,0,0),
            new IdentifierToken("foo",0,0),
            new SimpleToken(TokenKind::OpenParenthesis,0,0),
            new IdentifierToken("number",0,0),
            new IdentifierToken("bar",0,0),
            new SimpleToken(TokenKind::CommaToken,0,0),
            new IdentifierToken("number",0,0),
            new IdentifierToken("par",0,0),
            new SimpleToken(TokenKind::CloseParenthesis,0,0),
            new IdentifierToken("bar",0,0),
            new SimpleToken(TokenKind::PlusToken,0,0),
            new IdentifierToken("par",0,0),
            new SimpleToken(TokenKind::EndKeyword,0,0),
            new SimpleToken(TokenKind::EndOfFile,0,0),
    };
    Parser parser = Parser(v, nullptr);
    auto parsedStatements = parser.Parse() -> GetStatements();
    REQUIRE(parsedStatements.size() == 1);
    auto firstStatement = parsedStatements[0];
    REQUIRE(firstStatement -> GetKind() == ParsedStatementKind::FunctionDeclaration);
    auto functionDeclaration = (ParsedFunctionDeclarationStatement*)firstStatement;
    REQUIRE(functionDeclaration->GetIdentifier() == HashedString("foo"));
    auto parameters = functionDeclaration->GetParameters();
    CHECK(parameters[0]->GetType() == HashedString("number"));
    CHECK(parameters[0]->GetIdentifier() == HashedString("bar"));
    CHECK(parameters[1]->GetType() == HashedString("number"));
    CHECK(parameters[1]->GetIdentifier() == HashedString("par"));
}


#endif