// Copyright (c) 2019-present Dmitry Stepanov and Fyrox Engine contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

#![allow(unused_imports)]

use std::{env, fs::File, io::Write, path::PathBuf};

use futures::executor::block_on;
use fyrox_core::visitor::prelude::*;

#[derive(Debug, Clone, Default, PartialEq, Visit)]
struct NamedFields {
    a: f32,
    snake_case: u32,
}

#[derive(Debug, Clone, Default, PartialEq, Visit)]
struct UnitStruct;

#[derive(Debug, Clone, Default, PartialEq, Visit)]
struct TupleStruct(f32, u32);

#[derive(Debug, Clone, Default, PartialEq, Visit)]
struct SkipAttr {
    visited: f32,
    #[visit(skip)]
    skipped: u32,
}

#[derive(Debug, Clone, PartialEq, Visit)]
struct Generics<T: Visit + Default + 'static> {
    items: Vec<T>,
}

// NOTE: This enum doesn't implement copy, but `#[derive(Visit)]` still works
#[derive(Debug, Clone, PartialEq, Eq, Hash, Visit, Default)]
enum PlainEnum {
    #[default]
    A,
    B,
    C,
}

#[derive(Debug, Clone, PartialEq, Visit)]
enum OneOfTheTypes {
    NamedFields(NamedFields),
    PlainEnum(PlainEnum),
    U32(u32),
}

#[derive(Debug, Clone, PartialEq, Visit)]
enum ComplexEnum {
    UnitVariant,
    Tuple(i32, i32),
    NamedFields { a: f32, b: u32 },
}

#[derive(Debug, Clone, PartialEq, Visit)]
enum GenericEnum<T>
where
    T: std::fmt::Debug + Default + Visit + 'static,
{
    UnitVariant,
    Tuple(i32, Vec<T>),
}

#[test]
fn named_fields() {
    let mut data = NamedFields {
        a: 100.0,
        snake_case: 200,
    };
    let mut data_default = NamedFields::default();

    super::save_load("named_fields", &mut data, &mut data_default);

    // The default data was overwritten with saved data.
    // Now it should be same as the original data:
    assert_eq!(data, data_default);
}

#[test]
fn unit_struct() {
    let mut data = UnitStruct;
    let mut data_default = UnitStruct;

    // non seuse.. but anyways,
    // `Visit` is implemented `UnitStruct;` as empty code block `{}`
    super::save_load("unit_struct", &mut data, &mut data_default);

    assert_eq!(data, data_default);
}

#[test]
fn tuple_struct() {
    let mut data = TupleStruct(10.0, 20);
    let mut data_default = TupleStruct(0.0, 0);

    super::save_load("tuple_struct", &mut data, &mut data_default);

    assert_eq!(data, data_default);
}

#[test]
fn skip_attr() {
    let mut data = SkipAttr {
        visited: 10.0,
        skipped: 20,
    };
    let mut data_default = SkipAttr::default();

    super::save_load("skip_attr", &mut data, &mut data_default);

    // The default data was overwritten with saved data,
    // except the `skipped` field:
    assert_eq!(
        data_default,
        SkipAttr {
            visited: data.visited,
            skipped: Default::default(),
        }
    );
}

#[test]
fn generics() {
    // But `Generics<T: Visit` is `Visit`
    let mut data = Generics {
        items: vec![100u32],
    };
    let mut data_default = Generics { items: vec![] };

    super::save_load("generics", &mut data, &mut data_default);

    assert_eq!(data, data_default);
}

#[test]
fn plain_enum() {
    let mut data = PlainEnum::C;
    let mut data_default = PlainEnum::A;

    super::save_load("plain_enum", &mut data, &mut data_default);

    assert_eq!(data, data_default);
}

#[test]
fn one_of_the_types() {
    let mut data = OneOfTheTypes::NamedFields(NamedFields {
        a: 1.0,
        snake_case: 10,
    });
    let mut data_default = OneOfTheTypes::U32(0);

    super::save_load("one_of_the_types", &mut data, &mut data_default);

    assert_eq!(data, data_default);
}

#[test]
fn complex_enum() {
    let mut data = ComplexEnum::Tuple(100, 200);
    let mut data_default = ComplexEnum::UnitVariant;

    super::save_load("complex_enum", &mut data, &mut data_default);

    assert_eq!(data, data_default);
}

#[test]
fn generic_enum() {
    let mut data = GenericEnum::Tuple(1, vec![100u32]);
    let mut data_default = GenericEnum::UnitVariant;

    super::save_load("generic_enum", &mut data, &mut data_default);

    assert_eq!(data, data_default);
}