/*
 * MIT License
 *
 * Copyright (c) 2023 Andreas Nebinger, based on Joey Castillo's simple clock face
 *
 * 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 <stdlib.h>
#include <string.h>
#include "simple_clock_bin_led_face.h"
#include "watch.h"
#include "watch_utility.h"
#include "watch_private_display.h"

static void _update_alarm_indicator(bool settings_alarm_enabled, simple_clock_bin_led_state_t *state) {
    state->alarm_enabled = settings_alarm_enabled;
    if (state->alarm_enabled) watch_set_indicator(WATCH_INDICATOR_SIGNAL);
    else watch_clear_indicator(WATCH_INDICATOR_SIGNAL);
}

static void _display_left_aligned(uint8_t value) {
    if (value >= 10) {
        watch_display_character('0' + value / 10, 4);
        watch_display_character('0' + value % 10, 5);
    } else {
        watch_display_character('0' + value, 4);
        watch_display_character(' ', 5);
    }
}

void simple_clock_bin_led_face_setup(uint8_t watch_face_index, void ** context_ptr) {
    if (*context_ptr == NULL) {
        *context_ptr = malloc(sizeof(simple_clock_bin_led_state_t));
        memset(*context_ptr, 0, sizeof(simple_clock_bin_led_state_t));
        simple_clock_bin_led_state_t *state = (simple_clock_bin_led_state_t *)*context_ptr;
        state->watch_face_index = watch_face_index;
    }
}

void simple_clock_bin_led_face_activate(void *context) {
    simple_clock_bin_led_state_t *state = (simple_clock_bin_led_state_t *)context;

    if (watch_sleep_animation_is_running()) watch_stop_sleep_animation();

    if (movement_clock_mode_24h()) watch_set_indicator(WATCH_INDICATOR_24H);

    // handle chime indicator
    if (state->signal_enabled) watch_set_indicator(WATCH_INDICATOR_BELL);
    else watch_clear_indicator(WATCH_INDICATOR_BELL);

    // show alarm indicator if there is an active alarm
    _update_alarm_indicator(movement_alarm_enabled(), state);

    watch_set_colon();

    // this ensures that none of the timestamp fields will match, so we can re-render them all.
    state->previous_date_time = 0xFFFFFFFF;
}

bool simple_clock_bin_led_face_loop(movement_event_t event, void *context) {
    simple_clock_bin_led_state_t *state = (simple_clock_bin_led_state_t *)context;
    char buf[11];
    uint8_t pos;

    watch_date_time_t date_time;
    uint32_t previous_date_time;
    switch (event.event_type) {
        case EVENT_ACTIVATE:
        case EVENT_TICK:
        case EVENT_LOW_ENERGY_UPDATE:
            date_time = watch_rtc_get_date_time();
            if (state->flashing_state > 0) {
                if (state->ticks) {
                    state->ticks--;
                } else {
                    
                    if (state->flashing_state & 64) {
                        // start led on for current bit
                        state->flashing_state &= 63;
                        state->ticks = (state->flashing_value & 1 ? 7 : 1);
                        movement_illuminate_led();
                    } else {
                        // indicate first or switch to next bit
                        watch_set_led_off();
                        if ((state->flashing_state & 128) == 0) state->flashing_value = state->flashing_value >> 1;
                        if (state->flashing_value || (state->flashing_state & 128)) {
                            state->flashing_state &= 127;
                            state->flashing_state |= 64;
                            state->ticks = 6;
                        } else if (state->flashing_state & 1) {
                            // transition to minutes
                            state->flashing_state = 2 + 128;
                            state->flashing_value = date_time.unit.minute;
                            _display_left_aligned(state->flashing_value);
                            state->ticks = 9;
                        } else {
                            // end flashing
                            state->flashing_state = 0;
                            state->previous_date_time = 0xFFFFFFFF;
                            movement_request_tick_frequency(1);
                            watch_set_colon();
                        }
                    }
                }
            } else {
                previous_date_time = state->previous_date_time;
                state->previous_date_time = date_time.reg;

                // check the battery voltage once a day...
                if (date_time.unit.day != state->last_battery_check) {
                    state->last_battery_check = date_time.unit.day;
                    uint16_t voltage = watch_get_vcc_voltage();
                    // 2.2 volts will happen when the battery has maybe 5-10% remaining?
                    // we can refine this later.
                    state->battery_low = (voltage < 2200);
                }

                // ...and set the LAP indicator if low.
                if (state->battery_low) watch_set_indicator(WATCH_INDICATOR_LAP);

                if ((date_time.reg >> 6) == (previous_date_time >> 6) && event.event_type != EVENT_LOW_ENERGY_UPDATE) {
                    // everything before seconds is the same, don't waste cycles setting those segments.
                    watch_display_character_lp_seconds('0' + date_time.unit.second / 10, 8);
                    watch_display_character_lp_seconds('0' + date_time.unit.second % 10, 9);
                    break;
                } else if ((date_time.reg >> 12) == (previous_date_time >> 12) && event.event_type != EVENT_LOW_ENERGY_UPDATE) {
                    // everything before minutes is the same.
                    pos = 6;
                    sprintf(buf, "%02d%02d", date_time.unit.minute, date_time.unit.second);
                } else {
                    // other stuff changed; let's do it all.
                    if (!movement_clock_mode_24h()) {
                        // if we are in 12 hour mode, do some cleanup.
                        if (date_time.unit.hour < 12) {
                            watch_clear_indicator(WATCH_INDICATOR_PM);
                        } else {
                            watch_set_indicator(WATCH_INDICATOR_PM);
                        }
                        date_time.unit.hour %= 12;
                        if (date_time.unit.hour == 0) date_time.unit.hour = 12;
                    }
                    pos = 0;
                    if (event.event_type == EVENT_LOW_ENERGY_UPDATE) {
                        if (!watch_sleep_animation_is_running()) watch_start_sleep_animation(500);
                        sprintf(buf, "%s%2d%2d%02d  ", watch_utility_get_weekday(date_time), date_time.unit.day, date_time.unit.hour, date_time.unit.minute);
                    } else {
                        sprintf(buf, "%s%2d%2d%02d%02d", watch_utility_get_weekday(date_time), date_time.unit.day, date_time.unit.hour, date_time.unit.minute, date_time.unit.second);
                    }
                }
                watch_display_string(buf, pos);
                // handle alarm indicator
                if (state->alarm_enabled != movement_alarm_enabled()) _update_alarm_indicator(movement_alarm_enabled(), state);
            }
            break;
        case EVENT_ALARM_LONG_PRESS:
            state->signal_enabled = !state->signal_enabled;
            if (state->signal_enabled) watch_set_indicator(WATCH_INDICATOR_BELL);
            else watch_clear_indicator(WATCH_INDICATOR_BELL);
            break;
        case EVENT_BACKGROUND_TASK:
            // uncomment this line to snap back to the clock face when the hour signal sounds:
            // movement_move_to_face(state->watch_face_index);
            movement_play_signal();
            break;
        case EVENT_LIGHT_LONG_PRESS:
            if (state->flashing_state == 0) {
                date_time = watch_rtc_get_date_time();
                state->flashing_state = 1 + 128;
                state->ticks = 4;
                if (!movement_clock_mode_24h()) {
                    date_time.unit.hour %= 12;
                    if (date_time.unit.hour == 0) date_time.unit.hour = 12;
                }
                watch_display_string("      ", 4);
                _display_left_aligned(date_time.unit.hour);
                state->flashing_value = date_time.unit.hour > 12 ? date_time.unit.hour - 12 : date_time.unit.hour;
                watch_set_led_off();
                watch_clear_colon();
                movement_request_tick_frequency(8);
            }
            break;
        default:
            return movement_default_loop_handler(event);
    }

    return true;
}

void simple_clock_bin_led_face_resign(void *context) {
    (void) context;
}

movement_watch_face_advisory_t simple_clock_bin_led_face_advise(void *context) {
    simple_clock_bin_led_state_t *state = (simple_clock_bin_led_state_t *)context;
    movement_watch_face_advisory_t retval = { 0 };

    if (state->signal_enabled) {
        watch_date_time_t date_time = watch_rtc_get_date_time();
        retval.wants_background_task = date_time.unit.minute == 0;
    }

    return retval;
}
