use expect_test::{expect, Expect};
use oyster_parser::ast;
use oyster_runtime::Shell;

use crate::collect_output;

fn check(ast: &ast::Code, expect: Expect) {
    let actual = collect_output(|| {
        let mut shell = Shell::new().unwrap();
        shell.builtins_mut().add_defaults();
        shell.run(ast).unwrap();
    });
    expect.assert_debug_eq(&actual);
}

#[test]
fn add_single() {
    let ast = {
        use oyster_parser::ast::*;

        Code(vec![Statement::Pipeline(Pipeline(vec![Command(
            vec![
                Word(vec![WordPart::Text("+")]),
                Word(vec![WordPart::Text("5")]),
            ],
            Redirect::None,
        )]))])
    };

    check(
        &ast,
        expect![[r#"
            "5\r\n"
        "#]],
    );
}

#[test]
fn add_multiple() {
    let ast = {
        use oyster_parser::ast::*;

        Code(vec![Statement::Pipeline(Pipeline(vec![Command(
            vec![
                Word(vec![WordPart::Text("+")]),
                Word(vec![WordPart::Text("5")]),
                Word(vec![WordPart::Text("2")]),
                Word(vec![WordPart::Text("3")]),
            ],
            Redirect::None,
        )]))])
    };

    check(
        &ast,
        expect![[r#"
            "10\r\n"
        "#]],
    );
}

#[test]
fn sub() {
    let ast = {
        use oyster_parser::ast::*;

        Code(vec![Statement::Pipeline(Pipeline(vec![Command(
            vec![
                Word(vec![WordPart::Text("-")]),
                Word(vec![WordPart::Text("5")]),
                Word(vec![WordPart::Text("2")]),
            ],
            Redirect::None,
        )]))])
    };

    check(
        &ast,
        expect![[r#"
            "3\r\n"
        "#]],
    );
}

#[test]
fn mul() {
    let ast = {
        use oyster_parser::ast::*;

        Code(vec![Statement::Pipeline(Pipeline(vec![Command(
            vec![
                Word(vec![WordPart::Text("*")]),
                Word(vec![WordPart::Text("5")]),
                Word(vec![WordPart::Text("2")]),
            ],
            Redirect::None,
        )]))])
    };

    check(
        &ast,
        expect![[r#"
            "10\r\n"
        "#]],
    );
}

#[test]
fn simple_div() {
    let ast = {
        use oyster_parser::ast::*;

        Code(vec![Statement::Pipeline(Pipeline(vec![Command(
            vec![
                Word(vec![WordPart::Text("/")]),
                Word(vec![WordPart::Text("10")]),
                Word(vec![WordPart::Text("2")]),
            ],
            Redirect::None,
        )]))])
    };

    check(
        &ast,
        expect![[r#"
            "5\r\n"
        "#]],
    );
}

#[test]
fn fraction_div() {
    let ast = {
        use oyster_parser::ast::*;

        Code(vec![Statement::Pipeline(Pipeline(vec![Command(
            vec![
                Word(vec![WordPart::Text("/")]),
                Word(vec![WordPart::Text("9")]),
                Word(vec![WordPart::Text("2")]),
            ],
            Redirect::None,
        )]))])
    };

    check(
        &ast,
        expect![[r#"
            "4.5\r\n"
        "#]],
    );
}

#[test]
fn div_inf() {
    let ast = {
        use oyster_parser::ast::*;

        Code(vec![Statement::Pipeline(Pipeline(vec![Command(
            vec![
                Word(vec![WordPart::Text("/")]),
                Word(vec![WordPart::Text("1")]),
                Word(vec![WordPart::Text("0")]),
            ],
            Redirect::None,
        )]))])
    };

    check(
        &ast,
        expect![[r#"
            "inf\r\n"
        "#]],
    );
}