use rustic_sysy::tokenizer::{lexical_parser, LexicalTokenType};
use rustic_sysy::tokenizer::LexicalTokenType::{ConstInteger, Delimiter, Identifier, Keyword, Operator};

fn validate_tokens(input: &'static str, tokens: Vec<LexicalTokenType>) {
    let (_, actual_tokens) = lexical_parser(input).unwrap();

    assert_eq!(tokens.len(), actual_tokens.len());

    for (actual, except) in actual_tokens.iter().zip(tokens.iter()) {
        assert_eq!(&actual.token_type, except,
                   "The literal value of actual token is {}", actual.literal_value);
    }
}

#[test]
fn main_test() {
    validate_tokens("int main() { return 0; }", vec![
        Keyword,
        Identifier,
        Delimiter,
        Delimiter,
        Delimiter,
        Keyword,
        ConstInteger(0),
        Delimiter,
        Delimiter
    ]);
}

#[test]
fn number_test() {
    validate_tokens("123", vec![
        ConstInteger(123)
    ])
}

#[test]
fn hexadecimal_test() {
    validate_tokens("// test hexadecimal define
int main(){
    int a;
    a = 0xf;
    return a;
}", vec![
        Keyword,
        Identifier,
        Delimiter,
        Delimiter,
        Delimiter,
        Keyword,
        Identifier,
        Delimiter,
        Identifier,
        Operator,
        ConstInteger(15),
        Delimiter,
        Keyword,
        Identifier,
        Delimiter,
        Delimiter
    ]);
}

#[test]
fn while_and_if_test() {
    validate_tokens("
    // test while-if
    int whileIf() {
        int a;
        a = 0;
        int b;
        b = 0;
        while (a < 100) {
            if (a == 5) {
                b = 25;
            }
            else if (a == 10) {
                b = 42;
            }
            else {
                b = a * 2;
            }
            a = a + 1;
        }
        return (b);
    }", vec![
        // int whileIf() {
        Keyword,
        Identifier,
        Delimiter,
        Delimiter,
        Delimiter,
        // int a;
        Keyword,
        Identifier,
        Delimiter,
        // a = 0;
        Identifier,
        Operator,
        ConstInteger(0),
        Delimiter,
        // int b;
        Keyword,
        Identifier,
        Delimiter,
        // b = 0;
        Identifier,
        Operator,
        ConstInteger(0),
        Delimiter,
        // while (a < 100) {
        Keyword,
        Delimiter,
        Identifier,
        Operator,
        ConstInteger(100),
        Delimiter,
        Delimiter,
        // if (a == 5) {
        Keyword,
        Delimiter,
        Identifier,
        Operator,
        ConstInteger(5),
        Delimiter,
        Delimiter,
        // b = 25;
        Identifier,
        Operator,
        ConstInteger(25),
        Delimiter,
        // }
        Delimiter,
        // else if (a == 10) {
        Keyword,
        Keyword,
        Delimiter,
        Identifier,
        Operator,
        ConstInteger(10),
        Delimiter,
        Delimiter,
        // b = 42;
        Identifier,
        Operator,
        ConstInteger(42),
        Delimiter,
        // }
        Delimiter,
        // else {
        Keyword,
        Delimiter,
        // b = a * 2;
        Identifier,
        Operator,
        Identifier,
        Operator,
        ConstInteger(2),
        Delimiter,
        // }
        Delimiter,
        // a = a + 1;
        Identifier,
        Operator,
        Identifier,
        Operator,
        ConstInteger(1),
        Delimiter,
        // }
        Delimiter,
        // return (b);
        Keyword,
        Delimiter,
        Identifier,
        Delimiter,
        Delimiter,
        // }
        Delimiter
    ]);
}