/*
 * Copyright (C) 2019  Max Regan
 *
 * 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.
 */

#include "DisplayTimeTask.h"
#include "SystemTime.h"

#include "font-notomono-29.h"
#include "font-notomono-68.h"

using Common::ReturnCode;
using Common::Time;
using Common::Schedule::NextTime;

static const font &font_large = font_notomono_68;
static const font &font_default = font_notomono_29;

DisplayTimeTask::DisplayTimeTask(BSP::DisplayDriver &driver)
    : m_driver(driver)
    , m_has_cleared(false)
    , m_last_time()
    , m_display_seconds(true)
{}

static char get_char_for_digit(uint8_t bcd_digit)
{
    if (bcd_digit > 9) {
        return '0';
    }
    return bcd_digit + '0';
}


ReturnCode DisplayTimeTask::init()
{

    SET_TO(GPIOA->MODER, GPIO_MODER_MODE0, 1u << GPIO_MODER_MODE1_Pos);

    GPIOA->OTYPER &= ~GPIO_OTYPER_OT_1;
    GPIOA->PUPDR &= ~GPIO_PUPDR_PUPD1;
    GPIOA->PUPDR |= 2u << GPIO_PUPDR_PUPD1_Pos;

    return ReturnCode::OK;
}

void DisplayTimeTask::display_number(uint32_t x, uint32_t y, uint32_t tens, uint32_t ones, const font &f)
{
    char time_str[3] = { 0 };

    time_str[0] = get_char_for_digit(tens);
    time_str[1] = get_char_for_digit(ones);
    time_str[2] = '\0';

    m_driver.string_at(x, y, time_str, &f);
}

void DisplayTimeTask::display_time()
{
    BSP::time_bcd time;
    BSP::RtcDriver::get_time(time);

    if (!m_has_cleared) {
        m_driver.clear();
    }

    int i = 0;

    SET(GPIOA->ODR, GPIO_ODR_OD1);
    CLR(GPIOA->ODR, GPIO_ODR_OD1);

    if (m_last_time.hour_tens != time.hour_tens ||
        m_last_time.hour_ones != time.hour_ones ||
        !m_has_cleared) {
        display_number(8, (i * font_default.size) + (i + 1) * 4, time.hour_tens, time.hour_ones, font_default);
    }

    SET(GPIOA->ODR, GPIO_ODR_OD1);
    CLR(GPIOA->ODR, GPIO_ODR_OD1);

    i++;
    if (m_last_time.minute_tens != time.minute_tens ||
        m_last_time.minute_ones != time.minute_ones ||
        !m_has_cleared) {
        display_number(8, (i * font_default.size) + (i + 1) * 4, time.minute_tens, time.minute_ones, font_default);
    }

    SET(GPIOA->ODR, GPIO_ODR_OD1);
    CLR(GPIOA->ODR, GPIO_ODR_OD1);

    i++;
    if (m_display_seconds) {
        if (m_last_time.second_tens != time.second_tens ||
            m_last_time.second_ones != time.second_ones ||
            !m_has_cleared) {
            display_number(8, (i * font_default.size) + (i + 1) * 4, time.second_tens, time.second_ones, font_default);
        }
    }

    // m_has_cleared = true;
    m_last_time = time;

    SET(GPIOA->ODR, GPIO_ODR_OD1);
    CLR(GPIOA->ODR, GPIO_ODR_OD1);

    m_driver.refresh();

    SET(GPIOA->ODR, GPIO_ODR_OD1);
    CLR(GPIOA->ODR, GPIO_ODR_OD1);
}

NextTime DisplayTimeTask::execute()
{

    Common::time_t now;
    BSP::SystemTimer::get_time(now);
    uint32_t next_secs = Time::to_seconds(now) + 1;

    display_time();

    return NextTime::at(Time::seconds(next_secs));
}