// SPDX-License-Identifier: Apache-2.0
// SPDX-FileCopyrightText: 2021 The Gleam contributors

use crate::assert_js;
use crate::javascript::tests::CURRENT_PACKAGE;

#[test]
fn empty_module() {
    // Renders an export statement to ensure it's an ESModule
    assert_js!("", "export {}\n");
}

#[test]
fn unqualified_fn_call() {
    assert_js!(
        ("rocket_ship", r#"pub fn launch() { 1 }"#),
        r#"import rocket_ship.{launch}
pub fn go() { launch() }
"#,
    );
}

#[test]
fn aliased_unqualified_fn_call() {
    assert_js!(
        ("rocket_ship", r#"pub fn launch() { 1 }"#),
        r#"import rocket_ship.{launch as boom_time}
pub fn go() { boom_time() }
"#,
    );
}

#[test]
fn multiple_unqualified_fn_call() {
    assert_js!(
        (
            CURRENT_PACKAGE,
            "rocket_ship",
            r#"
pub fn a() { 1 }
pub fn b() { 2 }"#
        ),
        r#"import rocket_ship.{a,b as bb}
pub fn go() { a() + bb() }
"#,
    );
}

#[test]
fn constant() {
    assert_js!(
        ("rocket_ship", r#"pub const x = 1"#),
        r#"
import rocket_ship
pub fn go() { rocket_ship.x }
"#,
    );
}

#[test]
fn alias_aliased_constant() {
    assert_js!(
        ("rocket_ship", r#"pub const x = 1"#),
        r#"
import rocket_ship.{ x as y }
pub const z = y
"#,
    );
}

#[test]
fn renamed_module() {
    assert_js!(
        ("x", r#"pub const v = 1"#),
        r#"
import x as y
pub const z = y.v
"#,
    );
}

#[test]
fn nested_module_constant() {
    assert_js!(
        (
            CURRENT_PACKAGE,
            "rocket_ship/launcher",
            r#"pub const x = 1"#
        ),
        r#"
import rocket_ship/launcher
pub fn go() { launcher.x }
"#,
    );
}

#[test]
fn alias_constant() {
    assert_js!(
        ("rocket_ship", r#"pub const x = 1"#),
        r#"
import rocket_ship as boop
pub fn go() { boop.x }
"#,
    );
}

#[test]
fn alias_fn_call() {
    assert_js!(
        ("rocket_ship", r#"pub fn go() { 1 }"#),
        r#"
import rocket_ship as boop
pub fn go() { boop.go() }
"#,
    );
}

#[test]
fn nested_fn_call() {
    assert_js!(
        ("one/two", r#"pub fn go() { 1 }"#),
        r#"import one/two
pub fn go() { two.go() }"#,
    );
}

#[test]
fn nested_nested_fn_call() {
    assert_js!(
        ("one/two/three", r#"pub fn go() { 1 }"#),
        r#"import one/two/three
pub fn go() { three.go() }"#,
    );
}

#[test]
fn different_package_import() {
    assert_js!(
        ("other_package", "one", r#"pub fn go() { 1 }"#),
        r#"import one
pub fn go() { one.go() }
"#,
    );
}

#[test]
fn nested_same_package() {
    assert_js!(
        ("one/two/three", r#"pub fn go() { 1 }"#),
        r#"import one/two/three
pub fn go() { three.go() }
"#,
    );
}

#[test]
fn discarded_duplicate_import() {
    assert_js!(
        ("esa/rocket_ship", r#"pub fn go() { 1 }"#),
        ("nasa/rocket_ship", r#"pub fn go() { 1 }"#),
        r#"
import esa/rocket_ship
import nasa/rocket_ship as _nasa_rocket
pub fn go() { rocket_ship.go() }
"#
    );
}

#[test]
fn discarded_duplicate_import_with_unqualified() {
    assert_js!(
        ("esa/rocket_ship", r#"pub fn go() { 1 }"#),
        ("nasa/rocket_ship", r#"pub fn go() { 1 }"#),
        r#"
import esa/rocket_ship
import nasa/rocket_ship.{go} as _nasa_rocket
pub fn esa_go() { rocket_ship.go() }
pub fn nasa_go() { go() }
"#
    );
}

#[test]
fn import_with_keyword() {
    assert_js!(
        (
            CURRENT_PACKAGE,
            "rocket_ship",
            r#"
pub const class = 1
pub const in = 2
"#
        ),
        r#"
import rocket_ship.{class, in as while}
pub fn main() {
  #(class, while)
}
"#
    );
}

// https://github.com/gleam-lang/gleam/issues/3004
#[test]
fn constant_module_access_with_keyword() {
    assert_js!(
        ("rocket_ship", r#"pub const class = 1"#),
        r#"
import rocket_ship
pub const variable = rocket_ship.class
"#,
    );
}
