#!/bin/sh
# Hiker Print - Reset Button Handler with LED feedback
# 按住2秒：开始红蓝交替闪，松开红蓝长亮2秒，重启
# 按住超过5秒：开始红蓝同时闪，松开红蓝长亮2秒，恢复出厂设置

. /lib/functions.sh

LED_R="/sys/class/leds/hiker:red:led_r/brightness"
LED_R_TRIGGER="/sys/class/leds/hiker:red:led_r/trigger"
LED_B="/sys/class/leds/hiker:blue:led_b/brightness"
LED_B_TRIGGER="/sys/class/leds/hiker:blue:led_b/trigger"
PIDFILE="/var/run/reset_button_led.pid"

# Function to check if LED script is running
stop_led_script() {
	if [ -f "$PIDFILE" ]; then
		local pid=$(cat "$PIDFILE")
		if [ -d "/proc/$pid" ]; then
			kill "$pid" 2>/dev/null
		fi
		rm -f "$PIDFILE"
	fi
	rm -f /tmp/stop_led_blink
}

# Function to turn off both LEDs
turn_off_leds() {
	echo "none" > "$LED_R_TRIGGER" 2>/dev/null
	echo "none" > "$LED_B_TRIGGER" 2>/dev/null
	echo 0 > "$LED_R" 2>/dev/null
	echo 0 > "$LED_B" 2>/dev/null
}

# Function to turn on both LEDs
turn_on_leds() {
	echo "none" > "$LED_R_TRIGGER" 2>/dev/null
	echo "none" > "$LED_B_TRIGGER" 2>/dev/null
	echo 1 > "$LED_R" 2>/dev/null
	echo 1 > "$LED_B" 2>/dev/null
}

# Function to alternate red and blue LEDs (for reboot: 2-5s)
led_alternate_blink_loop() {
	local period=$1  # Blink period in seconds
	
	echo "none" > "$LED_R_TRIGGER" 2>/dev/null
	echo "none" > "$LED_B_TRIGGER" 2>/dev/null
	
	local start_time=$(date +%s)
	
	while [ ! -f /tmp/stop_led_blink ]; do
		local now=$(date +%s)
		local elapsed=$((now - start_time))
		
		# Only start blinking after 2 seconds
		if [ $elapsed -lt 2 ]; then
			sleep 1
			continue
		fi
		
		# Blue: on, Red: off
		echo 1 > "$LED_B" 2>/dev/null
		echo 0 > "$LED_R" 2>/dev/null
		sleep "$period"
		
		# Blue: off
		echo 0 > "$LED_B" 2>/dev/null
		
		# Red: on (instant switch)
		echo 1 > "$LED_R" 2>/dev/null
		sleep "$period"
		
		# Red: off
		echo 0 > "$LED_R" 2>/dev/null
		# Blue: on (instant switch, next iteration)
	done
	
	turn_off_leds
	rm -f /tmp/stop_led_blink
}

# Function to blink both LEDs together (for factory reset: 5s+)
led_both_blink_loop() {
	local period=$1  # Blink period in seconds
	
	echo "none" > "$LED_R_TRIGGER" 2>/dev/null
	echo "none" > "$LED_B_TRIGGER" 2>/dev/null
	
	local start_time=$(date +%s)
	
	while [ ! -f /tmp/stop_led_blink ]; do
		local now=$(date +%s)
		local elapsed=$((now - start_time))
		
		# Only start blinking after 2 seconds
		if [ $elapsed -lt 2 ]; then
			sleep 1
			continue
		fi
		
		# Check if we've passed 5 seconds - switch from alternate to both blink
		if [ $elapsed -lt 5 ]; then
			# Still in reboot zone (2-5s): alternate
			echo 1 > "$LED_B" 2>/dev/null
			echo 0 > "$LED_R" 2>/dev/null
			sleep "$period"
			echo 0 > "$LED_B" 2>/dev/null
			echo 1 > "$LED_R" 2>/dev/null
			sleep "$period"
			echo 0 > "$LED_R" 2>/dev/null
		else
			# Factory reset zone (5s+): both blink together
			turn_on_leds
			sleep "$period"
			turn_off_leds
			sleep "$period"
		fi
	done
	
	turn_off_leds
	rm -f /tmp/stop_led_blink
}

case "${ACTION}" in
	pressed)
		# Button pressed - wait 2 seconds then start LED feedback loop
		stop_led_script
		
		# Start background LED blink process (alternates 2-5s, both blink 5s+)
		rm -f /tmp/stop_led_blink
		led_both_blink_loop 1 &
		echo $! > "$PIDFILE"
		;;
	released)
		# Button released - stop LED and execute action
		stop_led_script
		# Wait for LED to turn off (no sleep - busybox doesn't support decimals)
		
		logger "$BUTTON pressed for $SEEN seconds"
		
		if [ "$SEEN" -lt 2 ]
		then
			# <2秒: 无操作
			echo "No action (<2s)" > /dev/console
			turn_off_leds
			exit 0
		elif [ "$SEEN" -ge 2 ] && [ "$SEEN" -lt 5 ]
		then
			# 2-5秒: 红蓝长亮2秒，然后重启
			echo "REBOOT (${SEEN}s pressed)" > /dev/console
			turn_on_leds
			sleep 2
			sync
			reboot
		elif [ "$SEEN" -ge 5 ]
		then
			# >=5秒: 红蓝长亮2秒，然后恢复出厂设置
			echo "FACTORY RESET (${SEEN}s pressed)" > /dev/console
			turn_on_leds
			sleep 2
			jffs2reset -y && reboot &
		fi
		;;
esac

return 0