#include <stdbool.h>
#include <stdint.h>
#include <string.h>

#include <app_event_manager.h>

#define MODULE settings_module
#include <caf/events/click_event.h>
#include <caf/events/module_state_event.h>
#include <caf/events/power_event.h>

#include <zephyr/logging/log.h>
#include <zephyr/sys/util.h>

#include "ble_bond_multi_event.h"
#include "encoder_event.h"
#include "module_lifecycle.h"
#include "settings_mode_event.h"
#include "theme_color.h"
#include "theme_rgb_update_event.h"
#include "ui/ui_settings_controller.h"

LOG_MODULE_REGISTER(MODULE, LOG_LEVEL_INF);

#define SETTINGS_MUTE_KEY_ID 0x180U

struct settings_module_ctx {
	struct module_lifecycle_ctx lc;
	bool active;
	struct theme_rgb current_theme;
};

static int do_init(void);
static int do_start(void);
static int do_stop(void);

static const struct module_lifecycle_cfg lifecycle_cfg = {
	.mode = ML_MODE_POWER,
	.stopped_state = MODULE_STATE_STANDBY,
};

static const struct module_lifecycle_ops lifecycle_ops = {
	.do_init = do_init,
	.do_start = do_start,
	.do_stop = do_stop,
};

static struct settings_module_ctx ctx = {
	.lc = {
		.state = LC_UNINIT,
		.cfg = &lifecycle_cfg,
		.ops = &lifecycle_ops,
	},
};

static void settings_exit(void)
{
	if (!ctx.active) {
		return;
	}

	ctx.active = false;
	ui_settings_controller_close();
	submit_settings_mode_event(false);
}

static void settings_enter(void)
{
	if (ctx.active) {
		return;
	}

	ctx.active = true;
	submit_settings_mode_event(true);
	ui_settings_controller_open();
}

static int do_init(void)
{
	ctx.active = false;
	ctx.current_theme = (struct theme_rgb) {
		.r = BLINKY_THEME_DEFAULT_R,
		.g = BLINKY_THEME_DEFAULT_G,
		.b = BLINKY_THEME_DEFAULT_B,
	};
	ui_settings_theme_set_current(ctx.current_theme);

	return 0;
}

static int do_start(void)
{
	return 0;
}

static int do_stop(void)
{
	settings_exit();
	return 0;
}

static bool handle_click_event(const struct click_event *event)
{
	if (!module_lifecycle_is_running(&ctx.lc) ||
	    (event->key_id != SETTINGS_MUTE_KEY_ID)) {
		return false;
	}

	if (!ctx.active) {
		if (event->click == CLICK_LONG) {
			settings_enter();
		}

		return false;
	}

	switch (event->click) {
	case CLICK_SHORT:
		ui_settings_controller_select();
		break;

	case CLICK_LONG:
		{
			bool active = ui_settings_controller_back();

			if (!active) {
				settings_exit();
			}
		}
		break;

	default:
		break;
	}

	return false;
}

static bool handle_encoder_event(const struct encoder_event *event)
{
	if (!module_lifecycle_is_running(&ctx.lc) || !ctx.active) {
		return false;
	}

	ui_settings_controller_move(event->detents);
	return false;
}

static bool handle_theme_rgb_update_event(
	const struct theme_rgb_update_event *event)
{
	ctx.current_theme = event->theme;
	ui_settings_theme_set_current(event->theme);

	if (ctx.active) {
		ui_settings_controller_refresh(false);
	}

	return false;
}

static bool handle_ble_bond_multi_event(
	const struct ble_bond_multi_event *event)
{
	ui_settings_ble_set_current_slot(event->current_slot);

	for (uint8_t i = 0U; i < ARRAY_SIZE(event->slots); i++) {
		ui_settings_ble_set_slot_meta(i + 1U, &event->slots[i]);
	}

	if (ctx.active) {
		ui_settings_controller_refresh(false);
	}

	return false;
}

static bool app_event_handler(const struct app_event_header *aeh)
{
	if (is_click_event(aeh)) {
		return handle_click_event(cast_click_event(aeh));
	}

	if (is_encoder_event(aeh)) {
		return handle_encoder_event(cast_encoder_event(aeh));
	}

	if (is_theme_rgb_update_event(aeh)) {
		return handle_theme_rgb_update_event(
			cast_theme_rgb_update_event(aeh));
	}

	if (is_ble_bond_multi_event(aeh)) {
		return handle_ble_bond_multi_event(
			cast_ble_bond_multi_event(aeh));
	}

	if (is_module_state_event(aeh)) {
		const struct module_state_event *event = cast_module_state_event(aeh);

		if (check_state(event, MODULE_ID(main), MODULE_STATE_READY)) {
			(void)module_set_lifecycle(&ctx.lc, LC_RUNNING);
		}

		return false;
	}

	if (is_power_down_event(aeh)) {
		if (module_lifecycle_is_initialized(&ctx.lc)) {
			(void)module_set_lifecycle(&ctx.lc, LC_STOPPED);
		}

		return false;
	}

	if (is_wake_up_event(aeh)) {
		if (module_lifecycle_is_initialized(&ctx.lc)) {
			(void)module_set_lifecycle(&ctx.lc, LC_RUNNING);
		}

		return false;
	}

	return false;
}

APP_EVENT_LISTENER(MODULE, app_event_handler);
APP_EVENT_SUBSCRIBE(MODULE, click_event);
APP_EVENT_SUBSCRIBE(MODULE, encoder_event);
APP_EVENT_SUBSCRIBE(MODULE, module_state_event);
APP_EVENT_SUBSCRIBE(MODULE, theme_rgb_update_event);
APP_EVENT_SUBSCRIBE(MODULE, ble_bond_multi_event);
APP_EVENT_SUBSCRIBE_EARLY(MODULE, power_down_event);
APP_EVENT_SUBSCRIBE(MODULE, wake_up_event);