import unittest

from crowbar_reference_compiler import build_ast, parse_header, scan
from crowbar_reference_compiler.ast import ArrayType, BasicType, ConstantExpression, EnumDeclaration, HeaderFile, \
    PointerType, StructDeclaration, UnionDeclaration, VariableDeclaration, VariableExpression


class TestAST(unittest.TestCase):
    def test_kitchen_sink(self):
        code = r"""
struct normal {
    bool fake;
    (uint8[3])* data;
}

opaque struct ope;

enum sample {
    Testing,
}

union robust {
    enum sample tag;
    
    switch (tag) {
        case Testing: bool testPassed;
    }
}

fragile union not_robust {
    int8 sample;
    bool nope;
}
"""
        tokens = scan(code)
        parse_tree = parse_header(tokens)
        decls = build_ast(parse_tree, [])
        normal = StructDeclaration('normal', [
            VariableDeclaration('fake', BasicType('bool')),
            VariableDeclaration('data', PointerType(ArrayType(BasicType('uint8'), ConstantExpression('3')))),
        ])
        ope = StructDeclaration('ope', None)
        sample = EnumDeclaration('sample', [('Testing', None)])
        robust = UnionDeclaration('robust', VariableDeclaration('tag', BasicType('enum sample')),
                                  [(VariableExpression('Testing'), VariableDeclaration('testPassed', BasicType('bool')))])
        not_robust = UnionDeclaration('not_robust', None, [
            VariableDeclaration('sample', BasicType('int8')),
            VariableDeclaration('nope', BasicType('bool')),
        ])
        self.assertEqual(decls, HeaderFile([], [normal, ope, sample, robust, not_robust]))


if __name__ == '__main__':
    unittest.main()