// ---------------------------------------------------------------------------
// Copyright:   (c) 2021 ff. Michael Amrhein (michael@adrhinum.de)
// License:     This program is part of a larger application. For license
//              details please read the file LICENSE.TXT provided together
//              with the application.
// ---------------------------------------------------------------------------
// $Source: tests/test_calc_order.rs $
// $Revision: 2021-11-01T15:03:36+01:00 $

#![allow(incomplete_features)]
#![feature(generic_const_exprs)]

#[cfg(test)]
mod tests {
    // use std::cmp::Ordering;

    use std::convert::TryInto;

    use rust_fixed_point_decimal::{Dec, Decimal, DivRounded, MulRounded};

    struct OrderDetail {
        quantity: u32,
        price: Decimal<2>,
        discount: Decimal<2>,
    }

    impl OrderDetail {
        fn new(
            quantity: u32,
            price: Decimal<2>,
            discount: Decimal<2>,
        ) -> OrderDetail {
            OrderDetail {
                quantity,
                price,
                discount,
            }
        }

        fn total(&self) -> Decimal<2> {
            let rate: Decimal<9> = (100_u8 - self.discount).div_rounded(100_u8);
            let net_price: Decimal<2> = self.price.mul_rounded(rate);
            self.quantity * net_price
        }
    }

    #[test]
    fn test_calc_detail_total() {
        let dtl = OrderDetail::new(17, Dec!(19.95), Dec!(30.00));
        assert_eq!(dtl.total(), Dec!(237.32));
    }

    static ORDER_DETAILS: [(u32, &str, &str); 300] = [
        (4, "19.95", "17.50"),
        (49, "49.90", "30.00"),
        (78, "7.95", "15.00"),
        (126, "7.95", "30.00"),
        (100, "12.95", "15.00"),
        (146, "7.95", "17.50"),
        (8, "12.95", "30.00"),
        (59, "19.95", "30.00"),
        (58, "49.90", "30.00"),
        (26, "7.95", "17.50"),
        (125, "19.95", "15.00"),
        (26, "49.90", "30.00"),
        (87, "49.90", "15.00"),
        (30, "12.95", "30.00"),
        (111, "19.95", "15.00"),
        (46, "48.00", "17.50"),
        (132, "49.90", "17.50"),
        (96, "32.00", "15.00"),
        (139, "32.00", "17.50"),
        (57, "19.95", "17.50"),
        (65, "12.95", "15.00"),
        (49, "32.00", "17.50"),
        (62, "48.00", "15.00"),
        (25, "48.00", "30.00"),
        (137, "32.00", "15.00"),
        (120, "7.95", "15.00"),
        (59, "32.00", "15.00"),
        (19, "7.95", "15.00"),
        (52, "7.95", "17.50"),
        (114, "49.90", "15.00"),
        (143, "32.00", "15.00"),
        (79, "48.00", "17.50"),
        (107, "48.00", "15.00"),
        (5, "48.00", "15.00"),
        (2, "7.95", "17.50"),
        (123, "48.00", "15.00"),
        (89, "7.95", "17.50"),
        (63, "32.00", "17.50"),
        (19, "7.95", "15.00"),
        (92, "12.95", "15.00"),
        (53, "48.00", "15.00"),
        (72, "12.95", "30.00"),
        (116, "48.00", "30.00"),
        (61, "48.00", "30.00"),
        (5, "7.95", "17.50"),
        (108, "19.95", "17.50"),
        (71, "7.95", "15.00"),
        (59, "32.00", "17.50"),
        (93, "32.00", "17.50"),
        (45, "7.95", "17.50"),
        (140, "48.00", "17.50"),
        (43, "32.00", "17.50"),
        (28, "48.00", "15.00"),
        (55, "19.95", "17.50"),
        (87, "48.00", "17.50"),
        (126, "49.90", "30.00"),
        (18, "19.95", "30.00"),
        (80, "49.90", "30.00"),
        (7, "7.95", "15.00"),
        (109, "19.95", "17.50"),
        (137, "49.90", "17.50"),
        (6, "7.95", "17.50"),
        (73, "19.95", "30.00"),
        (57, "32.00", "30.00"),
        (37, "49.90", "15.00"),
        (20, "12.95", "15.00"),
        (40, "19.95", "15.00"),
        (66, "32.00", "15.00"),
        (111, "49.90", "17.50"),
        (82, "49.90", "15.00"),
        (28, "12.95", "15.00"),
        (66, "48.00", "17.50"),
        (144, "48.00", "30.00"),
        (68, "48.00", "15.00"),
        (131, "32.00", "30.00"),
        (143, "12.95", "15.00"),
        (85, "49.90", "30.00"),
        (109, "32.00", "30.00"),
        (43, "12.95", "15.00"),
        (88, "19.95", "15.00"),
        (126, "12.95", "17.50"),
        (56, "19.95", "30.00"),
        (120, "32.00", "15.00"),
        (101, "12.95", "17.50"),
        (106, "48.00", "30.00"),
        (107, "12.95", "15.00"),
        (28, "19.95", "30.00"),
        (1, "7.95", "17.50"),
        (13, "12.95", "17.50"),
        (88, "49.90", "15.00"),
        (37, "49.90", "17.50"),
        (92, "49.90", "15.00"),
        (1, "12.95", "17.50"),
        (18, "12.95", "30.00"),
        (25, "19.95", "15.00"),
        (106, "32.00", "17.50"),
        (32, "7.95", "15.00"),
        (32, "49.90", "15.00"),
        (123, "48.00", "17.50"),
        (56, "49.90", "17.50"),
        (85, "7.95", "15.00"),
        (5, "7.95", "17.50"),
        (120, "12.95", "15.00"),
        (45, "12.95", "15.00"),
        (6, "32.00", "17.50"),
        (110, "19.95", "30.00"),
        (50, "7.95", "17.50"),
        (91, "7.95", "17.50"),
        (106, "12.95", "30.00"),
        (84, "32.00", "15.00"),
        (22, "12.95", "17.50"),
        (4, "19.95", "15.00"),
        (99, "49.90", "30.00"),
        (70, "19.95", "30.00"),
        (81, "48.00", "30.00"),
        (79, "12.95", "15.00"),
        (85, "32.00", "15.00"),
        (142, "19.95", "15.00"),
        (126, "7.95", "17.50"),
        (40, "49.90", "15.00"),
        (149, "32.00", "17.50"),
        (117, "32.00", "30.00"),
        (130, "48.00", "17.50"),
        (44, "12.95", "17.50"),
        (46, "7.95", "15.00"),
        (47, "49.90", "30.00"),
        (7, "49.90", "30.00"),
        (82, "7.95", "15.00"),
        (87, "48.00", "30.00"),
        (136, "7.95", "15.00"),
        (149, "32.00", "15.00"),
        (78, "19.95", "15.00"),
        (21, "48.00", "15.00"),
        (35, "19.95", "30.00"),
        (57, "19.95", "15.00"),
        (142, "49.90", "17.50"),
        (76, "12.95", "15.00"),
        (8, "12.95", "15.00"),
        (12, "19.95", "17.50"),
        (76, "48.00", "30.00"),
        (73, "12.95", "17.50"),
        (95, "48.00", "15.00"),
        (1, "19.95", "30.00"),
        (97, "49.90", "17.50"),
        (69, "48.00", "30.00"),
        (67, "49.90", "15.00"),
        (89, "7.95", "30.00"),
        (140, "49.90", "17.50"),
        (87, "12.95", "17.50"),
        (14, "12.95", "30.00"),
        (118, "19.95", "15.00"),
        (71, "19.95", "30.00"),
        (54, "49.90", "17.50"),
        (30, "32.00", "30.00"),
        (120, "32.00", "17.50"),
        (48, "49.90", "17.50"),
        (81, "48.00", "15.00"),
        (79, "49.90", "17.50"),
        (122, "12.95", "30.00"),
        (106, "49.90", "30.00"),
        (76, "7.95", "30.00"),
        (60, "32.00", "17.50"),
        (143, "12.95", "30.00"),
        (6, "48.00", "30.00"),
        (89, "7.95", "17.50"),
        (20, "7.95", "15.00"),
        (121, "48.00", "15.00"),
        (121, "19.95", "17.50"),
        (82, "19.95", "15.00"),
        (96, "12.95", "15.00"),
        (53, "48.00", "30.00"),
        (97, "48.00", "17.50"),
        (22, "49.90", "30.00"),
        (40, "7.95", "30.00"),
        (27, "49.90", "15.00"),
        (128, "32.00", "15.00"),
        (63, "7.95", "15.00"),
        (79, "7.95", "17.50"),
        (88, "49.90", "17.50"),
        (102, "49.90", "15.00"),
        (54, "48.00", "15.00"),
        (2, "48.00", "17.50"),
        (104, "32.00", "15.00"),
        (69, "19.95", "17.50"),
        (23, "19.95", "15.00"),
        (48, "32.00", "17.50"),
        (87, "32.00", "30.00"),
        (96, "7.95", "17.50"),
        (77, "7.95", "15.00"),
        (48, "49.90", "30.00"),
        (4, "7.95", "17.50"),
        (108, "12.95", "30.00"),
        (31, "19.95", "17.50"),
        (36, "32.00", "30.00"),
        (148, "12.95", "30.00"),
        (133, "48.00", "30.00"),
        (27, "7.95", "30.00"),
        (117, "32.00", "30.00"),
        (15, "32.00", "17.50"),
        (105, "7.95", "17.50"),
        (129, "12.95", "17.50"),
        (107, "48.00", "17.50"),
        (106, "48.00", "30.00"),
        (64, "32.00", "30.00"),
        (119, "49.90", "30.00"),
        (111, "7.95", "15.00"),
        (150, "19.95", "30.00"),
        (45, "7.95", "30.00"),
        (88, "48.00", "30.00"),
        (14, "49.90", "17.50"),
        (16, "48.00", "30.00"),
        (55, "7.95", "17.50"),
        (123, "48.00", "15.00"),
        (15, "32.00", "30.00"),
        (85, "48.00", "17.50"),
        (14, "7.95", "15.00"),
        (11, "19.95", "17.50"),
        (144, "19.95", "15.00"),
        (100, "12.95", "17.50"),
        (23, "12.95", "15.00"),
        (31, "48.00", "30.00"),
        (138, "48.00", "30.00"),
        (33, "48.00", "15.00"),
        (36, "19.95", "30.00"),
        (148, "12.95", "15.00"),
        (99, "32.00", "17.50"),
        (71, "32.00", "15.00"),
        (95, "19.95", "17.50"),
        (100, "7.95", "17.50"),
        (139, "12.95", "15.00"),
        (106, "7.95", "30.00"),
        (81, "7.95", "17.50"),
        (122, "49.90", "17.50"),
        (96, "7.95", "30.00"),
        (82, "7.95", "17.50"),
        (148, "49.90", "15.00"),
        (8, "48.00", "17.50"),
        (14, "48.00", "17.50"),
        (140, "48.00", "15.00"),
        (82, "19.95", "15.00"),
        (26, "12.95", "17.50"),
        (94, "32.00", "17.50"),
        (22, "19.95", "30.00"),
        (79, "32.00", "17.50"),
        (51, "48.00", "17.50"),
        (61, "49.90", "30.00"),
        (62, "49.90", "30.00"),
        (143, "49.90", "15.00"),
        (19, "7.95", "30.00"),
        (8, "32.00", "17.50"),
        (123, "32.00", "15.00"),
        (142, "7.95", "17.50"),
        (77, "19.95", "17.50"),
        (111, "32.00", "17.50"),
        (116, "48.00", "30.00"),
        (27, "19.95", "17.50"),
        (31, "12.95", "17.50"),
        (87, "12.95", "17.50"),
        (120, "49.90", "30.00"),
        (74, "7.95", "17.50"),
        (124, "19.95", "30.00"),
        (94, "7.95", "17.50"),
        (139, "32.00", "15.00"),
        (79, "12.95", "15.00"),
        (13, "12.95", "30.00"),
        (78, "19.95", "17.50"),
        (147, "19.95", "15.00"),
        (93, "7.95", "15.00"),
        (140, "32.00", "30.00"),
        (73, "48.00", "15.00"),
        (33, "48.00", "15.00"),
        (37, "19.95", "30.00"),
        (83, "48.00", "15.00"),
        (69, "32.00", "17.50"),
        (101, "32.00", "30.00"),
        (12, "49.90", "30.00"),
        (78, "7.95", "17.50"),
        (116, "32.00", "15.00"),
        (104, "12.95", "17.50"),
        (116, "7.95", "15.00"),
        (84, "7.95", "30.00"),
        (37, "48.00", "30.00"),
        (77, "19.95", "30.00"),
        (41, "7.95", "30.00"),
        (83, "12.95", "15.00"),
        (46, "48.00", "17.50"),
        (11, "48.00", "30.00"),
        (104, "12.95", "15.00"),
        (33, "19.95", "15.00"),
        (68, "48.00", "17.50"),
        (22, "7.95", "17.50"),
        (109, "48.00", "15.00"),
        (64, "12.95", "17.50"),
        (141, "7.95", "17.50"),
        (43, "49.90", "30.00"),
        (21, "19.95", "17.50"),
        (35, "32.00", "30.00"),
        (9, "49.90", "17.50"),
        (7, "19.95", "15.00"),
        (55, "32.00", "17.50"),
    ];

    fn calc_order(order: &Vec<OrderDetail>) -> (u32, Decimal<2>) {
        let mut total_qty: u32 = 0;
        let mut total_value = Decimal::<2>::ZERO;
        for dtl in order {
            total_qty += dtl.quantity;
            total_value = total_value + dtl.total();
        }
        (total_qty, total_value)
    }

    #[test]
    fn test_order() {
        let mut order: Vec<OrderDetail> = vec![];
        for (qty, price_str, discount_str) in ORDER_DETAILS {
            order.push(OrderDetail::new(
                qty,
                price_str.try_into().unwrap(),
                discount_str.try_into().unwrap(),
            ));
        }
        let (total_qty, total_value) = calc_order(&order);
        assert_eq!(total_qty, 22040);
        assert_eq!(total_value, Dec!(507505.86));
    }
}