# ============================================================
# HOTBOX Config
# ============================================================

[heater_generic chamber]
heater_pin: PA3 # <---------------  change this
sensor_type: Generic 3950
sensor_pin: PF6 # <---------------  change this
min_temp: 0
max_temp: 70
control: pid
pwm_cycle_time: 0.01
pid_Kp: 100
pid_Ki: 0.3
pid_Kd: 30

[verify_heater chamber]
max_error: 600
check_gain_time: 300
hysteresis: 5
heating_gain: 0.5

# Fans will run at 100% any time the hotbox element exceeds 35, regardless
# of what Klipper is doing (PID calibration, printing, idle, anything).
[temperature_fan hotbox]
pin: PD14 # <---------------  change this
sensor_type: Generic 3950
sensor_pin: PF7 # <---------------  change this
min_temp: 0
max_temp: 120
target_temp: 35.0
min_speed: 0.0
max_speed: 1.0
control: watermark
max_delta: 1
kick_start_time: 0.5

# ============================================================
# HOTBOX CONTROL LOOP
# Runs every 5 seconds from printer startup
# Stores chamber target into HOTBOX_STATE so backoff can restart
# Fan speed is now managed automatically by [temperature_fan hotbox]
# This loop only handles: state tracking + overtemp backoff
# ============================================================
[delayed_gcode HOTBOX_CONTROL]
initial_duration: 5
gcode:
    {% set hotbox_temp = printer['temperature_fan hotbox'].temperature %}
    {% set chamber_target = printer['heater_generic chamber'].target %}
    {% set heater_on = chamber_target > 0 %}
    {% if heater_on %}
        SET_GCODE_VARIABLE MACRO=HOTBOX_STATE VARIABLE=target VALUE={chamber_target}
    {% endif %}
    {% if hotbox_temp > 87 and heater_on %}
        SET_HEATER_TEMPERATURE HEATER=chamber TARGET=0
        UPDATE_DELAYED_GCODE ID=HOTBOX_BACKOFF DURATION=60
        RESPOND MSG="HotBox: Element at {hotbox_temp}C - 60s backoff, will restart automatically"
    {% endif %}
    UPDATE_DELAYED_GCODE ID=HOTBOX_CONTROL DURATION=5

# ============================================================
# HOTBOX BACKOFF TIMER
# Triggered by HOTBOX_CONTROL after element overtemp
# Calls HOTBOX_RESTART after 60 seconds
# ============================================================
[delayed_gcode HOTBOX_BACKOFF]
initial_duration: 0
gcode:
    HOTBOX_RESTART


[include hotbox_macros.cfg] # <---------------  put this with your other includes or at the end of the file

# ============================================================
# hotbox_macros.cfg
# HotBox enclosure heater user macros
# Include this file from printer.cfg with [include hotbox_macros.cfg]
# ============================================================

# ============================================================
# HOTBOX_STATE
# Stores the intended chamber target so backoff can restart
# This is set both by HOTBOX_ON and by the HOTBOX_CONTROL loop
# so it works whether you use the macro or set temp directly in Mainsail
# ============================================================
[gcode_macro HOTBOX_STATE]
variable_target: 0
gcode:

# ============================================================
# HOTBOX_ON
# Usage: HOTBOX_ON TARGET=60
# Heats enclosure to target temperature (default 60C, max 70C)
# Fans start automatically via [temperature_fan hotbox] - no manual control needed
# ============================================================
[gcode_macro HOTBOX_ON]
description: Heat enclosure to target temperature. Usage: HOTBOX_ON TARGET=60
gcode:
    {% set TARGET = params.TARGET|default(60)|float %}
    {% if TARGET > 70 %}
        RESPOND MSG="HotBox: Target {TARGET}C exceeds safe maximum of 70C - aborting"
    {% elif TARGET < 30 %}
        RESPOND MSG="HotBox: Target {TARGET}C is too low - minimum is 30C"
    {% else %}
        SET_GCODE_VARIABLE MACRO=HOTBOX_STATE VARIABLE=target VALUE={TARGET}
        SET_HEATER_TEMPERATURE HEATER=chamber TARGET={TARGET}
        UPDATE_DELAYED_GCODE ID=HOTBOX_CONTROL DURATION=5
        RESPOND MSG="HotBox: Heating enclosure to {TARGET}C - fans will run automatically"
    {% endif %}

# ============================================================
# HOTBOX_OFF
# Turns heater off and clears stored target
# Fans continue automatically until hotbox element cools below 40C
# ============================================================
[gcode_macro HOTBOX_OFF]
description: Turn off HotBox heater. Fans run automatically until hotbox cools below 40C
gcode:
    SET_GCODE_VARIABLE MACRO=HOTBOX_STATE VARIABLE=target VALUE=0
    SET_HEATER_TEMPERATURE HEATER=chamber TARGET=0
    RESPOND MSG="HotBox: Heater off - fans will run automatically until hotbox cools below 40C"

# ============================================================
# HOTBOX_STATUS
# Prints current hotbox status to console
# ============================================================
[gcode_macro HOTBOX_STATUS]
description: Report current HotBox temperatures and fan status
gcode:
    {% set hotbox_temp = printer['temperature_fan hotbox'].temperature %}
    {% set chamber_temp = printer['heater_generic chamber'].temperature %}
    {% set chamber_target = printer['heater_generic chamber'].target %}
    {% set fan_speed = printer['temperature_fan hotbox'].speed %}
    {% set intended_target = printer['gcode_macro HOTBOX_STATE'].target %}
    RESPOND MSG="HotBox Status:"
    RESPOND MSG="  Chamber temp: {chamber_temp}C / Target: {chamber_target}C"
    RESPOND MSG="  Hotbox element: {hotbox_temp}C"
    RESPOND MSG="  Fan speed: {(fan_speed * 100)|round}%"
    RESPOND MSG="  Stored target: {intended_target}C"

# ============================================================
# HOTBOX_RESTART
# Called automatically after 60s backoff - do not call manually
# Restarts heater using stored target if element has cooled below 75C
# ============================================================
[gcode_macro HOTBOX_RESTART]
description: Internal - restarts heater after backoff cooldown
gcode:
    {% set intended_target = printer['gcode_macro HOTBOX_STATE'].target %}
    {% set hotbox_temp = printer['temperature_fan hotbox'].temperature %}
    {% if intended_target > 0 %}
        {% if hotbox_temp < 70 %}
            SET_HEATER_TEMPERATURE HEATER=chamber TARGET={intended_target}
            RESPOND MSG="HotBox: Element cooled to {hotbox_temp}C - restarting heater to {intended_target}C"
        {% else %}
            RESPOND MSG="HotBox: Element still at {hotbox_temp}C - waiting another 60s"
            UPDATE_DELAYED_GCODE ID=HOTBOX_BACKOFF DURATION=60
        {% endif %}
    {% else %}
        RESPOND MSG="HotBox: No stored target - not restarting"
    {% endif %}