use super::parse;
use super::parsed_statement::ParsedStatement;
use crate::modifiers::TypeModifier;
use crate::parsing::lexer::lex_tokens::{LexToken, TokenType};
use crate::parsing::parser::parsed_statement::ParsedStatement::DataTypeAuto;
use crate::parsing::parser::parser_operators::{BinaryOperator, PreOperator};
use crate::span::Span;
use enumflags2::BitFlags;

fn create_tokens(types: Vec<TokenType>) -> Vec<LexToken> {
    let mut v = Vec::with_capacity(types.len());
    for t in types {
        v.push(LexToken {
            token_type: t,
            span: Span::new(0, 0),
        });
    }
    v
}

#[test]
fn test_empty_namespace() {
    let script = parse(
        create_tokens(vec![
            TokenType::NamespaceKeyword,
            TokenType::WhiteSpace,
            TokenType::Identifier("foo".to_string()),
            TokenType::WhiteSpace,
            TokenType::OpenCurlyBracket,
            TokenType::CloseCurlyBracket,
            TokenType::EndOfFile,
        ]),
        &mut |_message, _span| {
            std::panic::panic_any(_message.stringify());
        },
    );
    if let ParsedStatement::Script { statements } = script.as_ref() {
        assert_eq!(1, statements.len());
        if let ParsedStatement::Namespace { identifier, script } = &statements[0] {
            assert_eq!(identifier, "foo");
            if let ParsedStatement::Script { statements } = script.as_ref() {
                assert_eq!(0, statements.len());
            } else {
                unreachable!();
            }
        } else {
            unreachable!()
        }
    } else {
        unreachable!();
    }
}

#[test]
fn test_empty_interface() {
    let script = parse(
        create_tokens(vec![
            TokenType::InterfaceKeyword,
            TokenType::WhiteSpace,
            TokenType::Identifier("foo".to_string()),
            TokenType::WhiteSpace,
            TokenType::OpenCurlyBracket,
            TokenType::CloseCurlyBracket,
            TokenType::EndOfFile,
        ]),
        &mut |_message, _span| {
            std::panic::panic_any(_message.stringify());
        },
    );
    if let ParsedStatement::Script { statements } = script.as_ref() {
        assert_eq!(1, statements.len());
        if let ParsedStatement::Interface {
            type_mod,
            identifier,
            inherits,
            statements,
        } = &statements[0]
        {
            assert!(type_mod.is_empty());
            assert_eq!(identifier, "foo");
            assert_eq!(inherits.len(), 0);
            assert_eq!(statements.len(), 0);
        } else {
            unreachable!()
        }
    } else {
        unreachable!();
    }
}

#[test]
fn test_empty_external_shared_interface() {
    let script = parse(
        create_tokens(vec![
            TokenType::ExternalKeyword,
            TokenType::SharedKeyword,
            TokenType::InterfaceKeyword,
            TokenType::WhiteSpace,
            TokenType::Identifier("foo".to_string()),
            TokenType::WhiteSpace,
            TokenType::OpenCurlyBracket,
            TokenType::CloseCurlyBracket,
            TokenType::EndOfFile,
        ]),
        &mut |_message, _span| {
            std::panic::panic_any(_message.stringify());
        },
    );
    if let ParsedStatement::Script { statements } = script.as_ref() {
        assert_eq!(1, statements.len());
        if let ParsedStatement::Interface {
            type_mod,
            identifier,
            inherits,
            statements,
        } = &statements[0]
        {
            assert!(!type_mod.is_empty());
            assert!(type_mod.contains(TypeModifier::External));
            assert!(type_mod.contains(TypeModifier::Shared));
            assert_eq!(identifier, "foo");
            assert_eq!(inherits.len(), 0);
            assert_eq!(statements.len(), 0);
        } else {
            unreachable!()
        }
    } else {
        unreachable!();
    }
}

#[test]
fn test_interface_with_virtprop() {
    let script = parse(
        create_tokens(vec![
            TokenType::InterfaceKeyword,
            TokenType::WhiteSpace,
            TokenType::Identifier("foo".to_string()),
            TokenType::WhiteSpace,
            TokenType::OpenCurlyBracket,
            TokenType::Identifier("bar".to_string()),
            TokenType::Identifier("get_bar".to_string()),
            TokenType::OpenCurlyBracket,
            TokenType::GetKeyword,
            TokenType::Semicolon,
            TokenType::SetKeyword,
            TokenType::Semicolon,
            TokenType::CloseCurlyBracket,
            TokenType::CloseCurlyBracket,
            TokenType::EndOfFile,
        ]),
        &mut |_message, _span| {
            std::panic::panic_any(_message.stringify());
        },
    );
    if let ParsedStatement::Script { statements } = script.as_ref() {
        assert_eq!(1, statements.len());
        if let ParsedStatement::Interface {
            type_mod,
            identifier,
            inherits,
            statements,
        } = &statements[0]
        {
            assert!(type_mod.is_empty());
            assert_eq!(identifier, "foo");
            assert_eq!(inherits.len(), 0);
            assert_eq!(statements.len(), 1);
            if let ParsedStatement::VirtProp {
                field_mod,
                property_type,
                identifier,
                is_handle,
                has_get,
                is_get_const,
                get_statement,
                has_set,
                is_set_const,
                set_statement,
            } = &statements[0]
            {
                assert_eq!(*field_mod, BitFlags::empty());
                if let ParsedStatement::Type {
                    is_const, datatype, ..
                } = property_type.as_ref()
                {
                    assert!(!is_const);
                    if let ParsedStatement::DataTypeIdentifier { identifier, .. } =
                        datatype.as_ref()
                    {
                        assert_eq!(identifier, "bar");
                    } else {
                        unreachable!()
                    }
                } else {
                    unreachable!()
                }
                assert_eq!(identifier, "get_bar");
                assert!(has_get);
                assert!(!is_get_const);
                assert!(has_set);
                assert!(!is_set_const);
                assert!(get_statement.is_none());
                assert!(set_statement.is_none());
                assert!(!is_handle);
            } else {
                unreachable!()
            }
        } else {
            unreachable!()
        }
    } else {
        unreachable!();
    }
}

#[test]
fn test_assign_to_global_variable() {
    let script = parse(
        create_tokens(vec![
            TokenType::AutoKeyword,
            TokenType::WhiteSpace,
            TokenType::Identifier("foo".to_string()),
            TokenType::WhiteSpace,
            TokenType::Equals,
            TokenType::WhiteSpace,
            TokenType::IntegerLiteral(100),
            TokenType::EndOfFile,
        ]),
        &mut |_message, _span| {
            std::panic::panic_any(_message.stringify());
        },
    );
    if let ParsedStatement::Script { statements } = script.as_ref() {
        assert_eq!(1, statements.len());
        if let ParsedStatement::Var {
            modifier,
            var_type,
            identifier,
            assignment,
        } = &statements[0]
        {
            assert!(modifier.is_empty());
            assert_eq!(
                *var_type.as_ref(),
                ParsedStatement::Type {
                    is_const: false,
                    scope: None,
                    datatype: Box::from(DataTypeAuto {}),
                    modifiers: vec![]
                }
            );
            assert_eq!(identifier, "foo");
            assert!(assignment.is_some());
            assert_eq!(
                *(assignment.as_ref().unwrap().as_ref()),
                ParsedStatement::IntegerLiteral(100)
            );
        } else {
            unreachable!()
        }
    } else {
        unreachable!();
    }
}

#[test]
fn test_assign_negative_to_global_variable() {
    let script = parse(
        create_tokens(vec![
            TokenType::AutoKeyword,
            TokenType::WhiteSpace,
            TokenType::Identifier("foo".to_string()),
            TokenType::WhiteSpace,
            TokenType::Equals,
            TokenType::WhiteSpace,
            TokenType::Minus,
            TokenType::IntegerLiteral(100),
            TokenType::EndOfFile,
        ]),
        &mut |_message, _span| {
            std::panic::panic_any(_message.stringify());
        },
    );
    if let ParsedStatement::Script { statements } = script.as_ref() {
        assert_eq!(1, statements.len());
        if let ParsedStatement::Var {
            modifier,
            var_type,
            identifier,
            assignment,
        } = &statements[0]
        {
            assert!(modifier.is_empty());
            assert_eq!(
                *var_type.as_ref(),
                ParsedStatement::Type {
                    is_const: false,
                    scope: None,
                    datatype: Box::from(DataTypeAuto {}),
                    modifiers: vec![]
                }
            );
            assert_eq!(identifier, "foo");
            assert!(assignment.is_some());
            assert_eq!(
                *(assignment.as_ref().unwrap().as_ref()),
                ParsedStatement::ExprPreOp {
                    operator: PreOperator::Negative,
                    operand: Box::from(ParsedStatement::IntegerLiteral(100)),
                }
            );
        } else {
            unreachable!()
        }
    } else {
        unreachable!();
    }
}

#[test]
fn test_assign_addition_to_global_variable() {
    let script = parse(
        create_tokens(vec![
            TokenType::AutoKeyword,
            TokenType::WhiteSpace,
            TokenType::Identifier("foo".to_string()),
            TokenType::WhiteSpace,
            TokenType::Equals,
            TokenType::WhiteSpace,
            TokenType::IntegerLiteral(100),
            TokenType::Plus,
            TokenType::Minus,
            TokenType::IntegerLiteral(20),
            TokenType::EndOfFile,
        ]),
        &mut |_message, _span| {
            std::panic::panic_any(_message.stringify());
        },
    );
    if let ParsedStatement::Script { statements } = script.as_ref() {
        assert_eq!(1, statements.len());
        if let ParsedStatement::Var {
            modifier,
            var_type,
            identifier,
            assignment,
        } = &statements[0]
        {
            assert!(modifier.is_empty());
            assert_eq!(
                *var_type.as_ref(),
                ParsedStatement::Type {
                    is_const: false,
                    scope: None,
                    datatype: Box::from(DataTypeAuto {}),
                    modifiers: vec![]
                }
            );
            assert_eq!(identifier, "foo");
            assert!(assignment.is_some());
            assert_eq!(
                *(assignment.as_ref().unwrap().as_ref()),
                ParsedStatement::BinaryExpr {
                    left: Box::new(ParsedStatement::IntegerLiteral(100)),
                    operator: BinaryOperator::Addition,
                    right: Box::new(ParsedStatement::ExprPreOp {
                        operator: PreOperator::Negative,
                        operand: Box::new(ParsedStatement::IntegerLiteral(20)),
                    }),
                }
            );
        } else {
            unreachable!()
        }
    } else {
        unreachable!();
    }
}