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//! Generators that provide fixed currents
use super::{Chip, ChipInfo, Pin, PinType};
use crate::State;
use std::cell::RefCell;
use std::rc::Rc;

/// # A simple generator providing VCC and GND
///
/// # Diagram
/// ```
///        --------
///  VCC --|1    2|-- GND
///        --------
/// ```
#[derive(Debug)]
pub struct Generator {
    uuid: u128,
    pin: [Rc<RefCell<Pin>>; 2],
}
impl Default for Generator {
    fn default() -> Self {
        Self::new()
    }
}

impl Generator {
    pub const TYPE: &'static str = "virt_ic::Generator";

    pub const VCC: u8 = 1;
    pub const GND: u8 = 2;

    pub fn new() -> Self {
        let uuid = uuid::Uuid::new_v4().as_u128();
        let gen = Generator {
            uuid,
            pin: [
                Rc::new(RefCell::new(Pin::new(uuid, 1, PinType::Output))),
                Rc::new(RefCell::new(Pin::new(uuid, 2, PinType::Output))),
            ],
        };
        gen.pin[0].borrow_mut().state = State::High;
        gen.pin[1].borrow_mut().state = State::Low;
        gen
    }
}
impl Chip for Generator {
    fn get_uuid(&self) -> u128 {
        self.uuid
    }
    fn get_type(&self) -> &str {
        Self::TYPE
    }
    fn get_pin_qty(&self) -> u8 {
        2
    }

    fn _get_pin(&mut self, pin: u8) -> Rc<RefCell<Pin>> {
        self.pin[pin as usize - 1].clone()
    }

    fn get_info(&self) -> ChipInfo {
        ChipInfo {
            name: "Generator",
            description: "A simple generator that provides VCC and GND for chips",
            data: String::new()
        }
    }

    fn run(&mut self, _: std::time::Duration) {
        self.pin[0].borrow_mut().state = State::High;
        self.pin[1].borrow_mut().state = State::Low;
    }
}