use stm32f1xx_hal::{
    delay::Delay,
    pac::Interrupt,
    prelude::*,
    serial::{Config, Serial},
    spi::{Mode, Phase, Polarity, Spi},
    stm32,
    timer::{Event, Timer},
};

use nmea0183::Parser;

use crate::application::App;
use crate::time;

pub fn setup(cp: cortex_m::peripheral::Peripherals, dp: stm32::Peripherals) -> App {
    // Take ownership over the raw flash and rcc devices and convert them into the corresponding
    // HAL structs
    let mut flash = dp.FLASH.constrain();

    let mut rcc = dp.RCC.constrain();

    // Freeze the configuration of all the clocks in the system and store the frozen frequencies in
    // `clocks`
    let clocks = rcc
        .cfgr
        .use_hse(8.mhz())
        .sysclk(72.mhz())
        .pclk1(36.mhz())
        .freeze(&mut flash.acr);

    defmt::info!("Clock Setup done");

    // Acquire the GPIOC peripheral
    let mut gpioa = dp.GPIOA.split(&mut rcc.apb2);
    let mut gpiob = dp.GPIOB.split(&mut rcc.apb2);
    let mut gpioc = dp.GPIOC.split(&mut rcc.apb2);

    let mut afio = dp.AFIO.constrain(&mut rcc.apb2);

    let board_led = gpioc.pc13.into_push_pull_output(&mut gpioc.crh);

    let delay = Delay::new(cp.SYST, clocks);

    let button1 = gpiob.pb0.into_floating_input(&mut gpiob.crl);
    let button2 = gpiob.pb1.into_floating_input(&mut gpiob.crl);

    // USART1
    // Configure pa9 as a push_pull output, this will be the tx pin
    let tx = gpioa.pa9.into_alternate_push_pull(&mut gpioa.crh);
    // Take ownership over pa10
    let rx = gpioa.pa10;

    // Set up the usart device. Taks ownership over the USART register and tx/rx pins. The rest of
    // the registers are used to enable and configure the device.
    let serial = Serial::usart1(
        dp.USART1,
        (tx, rx),
        &mut afio.mapr,
        Config::default().baudrate(9600.bps()),
        clocks,
        &mut rcc.apb2,
    );

    let gps_parser = Parser::new();

    // SPI1
    let sck = gpioa.pa5.into_alternate_push_pull(&mut gpioa.crl);
    let miso = gpioa.pa6;
    let mosi = gpioa.pa7.into_alternate_push_pull(&mut gpioa.crl);

    let spi = Spi::spi1(
        dp.SPI1,
        (sck, miso, mosi),
        &mut afio.mapr,
        Mode {
            polarity: Polarity::IdleLow,
            phase: Phase::CaptureOnFirstTransition,
        },
        1.khz(),
        clocks,
        &mut rcc.apb2,
    );

    let disp_strobe = gpioa.pa0.into_push_pull_output(&mut gpioa.crl);

    time::setup(dp.TIM2, &clocks, &mut rcc.apb1);

    App {
        delay,
        board_led,
        serial,
        gps_parser,
        button1,
        button2,
        spi,
        disp_strobe,
    }
}