#![no_std]
#![no_main]
#![deny(
    clippy::mem_forget,
    reason = "mem::forget is generally not safe to do with esp_hal types, especially those \
    holding buffers for the duration of a data transfer."
)]
#![deny(clippy::large_stack_frames)]

use alloc::boxed::Box;
use creaturedex::card::decoder::split_nfc_hex;
use creaturedex::card::model::Card;
use creaturedex::display::shared_bus::{DualSecondaryDisplay, init_dual_displays};
use creaturedex::display::tertiary_lcd::{TertiaryI2cLcd, init_tertiary_lcd, write_wrapped};
use creaturedex::drivers::nfc_pn532::NfcPn532Driver;
use creaturedex::navigation::inputs::Inputs;
use creaturedex::navigation::navigation::{self, CARD_DATA};
use creaturedex::navigation::outputs::Outputs;
use creaturedex::network::wifi::setup_wifi;
use embassy_executor::Spawner;
use embassy_time::Instant;
use embedded_graphics::pixelcolor::BinaryColor;
use embedded_graphics::{
    mono_font::{MonoTextStyle, ascii::FONT_6X10},
    prelude::*,
    text::Text,
};
use embedded_hal_bus::i2c::AtomicDevice;
use embedded_hal_bus::util::AtomicCell;
use esp_hal::Blocking;
use esp_hal::clock::CpuClock;
use esp_hal::gpio::{Input, InputConfig, Level, Output, OutputConfig, Pull};
use esp_hal::i2c::master::{Config as I2cConfig, I2c};
use esp_hal::timer::timg::TimerGroup;
use log::error;

#[panic_handler]
fn panic(panic_info: &core::panic::PanicInfo) -> ! {
    error!("{}", panic_info);
    loop {}
}

extern crate alloc;

const HEAP_SIZE: usize = 73744;

// This creates a default app-descriptor required by the esp-idf bootloader.
// For more information see: <https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-reference/system/app_image_format.html#application-description>
esp_bootloader_esp_idf::esp_app_desc!();

#[allow(
    clippy::large_stack_frames,
    reason = "it's not unusual to allocate larger buffers etc. in main"
)]
#[esp_rtos::main]
async fn main(spawner: Spawner) {
    esp_println::logger::init_logger_from_env();

    let config = esp_hal::Config::default().with_cpu_clock(CpuClock::max());
    let peripherals = esp_hal::init(config);

    esp_alloc::heap_allocator!(#[esp_hal::ram(reclaimed)] size: HEAP_SIZE);

    let sw_interrupt =
        esp_hal::interrupt::software::SoftwareInterruptControl::new(peripherals.SW_INTERRUPT);
    let timg0 = TimerGroup::new(peripherals.TIMG0);
    esp_rtos::start(timg0.timer0, sw_interrupt.software_interrupt0);

    let (display, mut oled) = init_dual_displays(
        peripherals.SPI2,
        peripherals.GPIO36, // sck
        peripherals.GPIO35, // mosi
        peripherals.GPIO37, // miso
        peripherals.GPIO11, // primary cs
        peripherals.GPIO13, // oled cs
        peripherals.GPIO10, // primary reset
        peripherals.GPIO47, // secondary reset
        peripherals.GPIO12, // shared dc
    );

    let _secondary_oled_cs_2 =
        Output::new(peripherals.GPIO14, Level::High, OutputConfig::default());
    let _secondary_oled_cs_3 =
        Output::new(peripherals.GPIO21, Level::High, OutputConfig::default());

    let config = I2cConfig::default().with_frequency(esp_hal::time::Rate::from_khz(400));
    let i2c = match I2c::new(peripherals.I2C0, config) {
        Ok(bus) => bus
            .with_sda(peripherals.GPIO17)
            .with_scl(peripherals.GPIO18),
        Err(e) => {
            log::error!("Shared I2C bus initialization failed for GPIO17/GPIO18: {e:?}");
            panic!("Shared I2C bus initialization failed");
        }
    };
    let shared_i2c = Box::leak(Box::new(AtomicCell::new(i2c)));
    log::info!("Shared I2C bus ready on GPIO17 (SDA) and GPIO18 (SCL)");

    let mut lcd: TertiaryI2cLcd = init_tertiary_lcd(AtomicDevice::new(shared_i2c));
    if let Err(e) = write_wrapped(&mut lcd, "Testing more than 16 chars what happens now?") {
        log::error!(
            "Tertiary LCD startup text write failed over shared I2C bus; check the shared bus, wiring, and device responses: {e}"
        );
    }

    setup_wifi(peripherals.WIFI, peripherals.FLASH, &spawner).await;

    let mut nfc_driver = NfcPn532Driver::new(AtomicDevice::new(shared_i2c));
    if nfc_driver.configure_sam().await.is_ok() {
        log::info!("NFC SAM configuration successful on the shared I2C bus");
    } else {
        log::error!("NFC SAM configuration failed on the shared I2C bus");
    }

    let button_config = InputConfig::default().with_pull(Pull::Up);
    let inputs = Inputs {
        up: Input::new(peripherals.GPIO38, button_config),
        down: Input::new(peripherals.GPIO39, button_config),
        left: Input::new(peripherals.GPIO40, button_config),
        right: Input::new(peripherals.GPIO41, button_config),
        back: Input::new(peripherals.GPIO8, button_config),
        ok: Input::new(peripherals.GPIO0, button_config),
    };

    display_shit(&mut oled);

    let outputs = Outputs {
        primary_display: display,
        secondary_display_1: oled,
        // secondary_display_2: todo!(),
        // secondary_display_3: todo!(),
        tertiary_display: lcd,
        _led_a: (),
    };

    log::info!("Setup complete, entering main loop");
    spawner.spawn(navigation::run(inputs, outputs).expect("run task failed"));
    spawner.spawn(nfc_driver_task(nfc_driver).expect("nfc driver task failed"));
}

#[embassy_executor::task]
#[allow(
    clippy::large_stack_frames,
    reason = "ignoring this for now because it still works"
)]
async fn nfc_driver_task(
    mut nfc_driver: NfcPn532Driver<AtomicDevice<'static, I2c<'static, Blocking>>>,
) {
    loop {
        while CARD_DATA.lock().await.is_none() {
            let start = Instant::now();
            match nfc_driver.read_card_data().await {
                Ok(card_data) => {
                    let Some(split_data) = split_nfc_hex(&card_data) else {
                        log::error!("Failed to split NFC card data");
                        continue;
                    };
                    CARD_DATA
                        .lock()
                        .await
                        .replace(Card::try_from(split_data).unwrap());
                    let elapsed_ms = start.elapsed().as_millis();
                    log::info!(
                        "NFC read duration: {} ms, card data length: {}",
                        elapsed_ms,
                        card_data.len()
                    );
                }
                Err(_) => {
                    log::info!("No NFC card found");
                }
            }
        }
        embassy_time::Timer::after(embassy_time::Duration::from_millis(1000)).await;
    }
}

fn display_shit(oled: &mut DualSecondaryDisplay<'static>) {
    oled.clear().unwrap();

    let text_style = MonoTextStyle::new(&FONT_6X10, BinaryColor::On);
    Text::new("Hello OLED", Point::new(10, 20), text_style)
        .draw(oled)
        .unwrap();
    oled.flush().unwrap();
}