[gcode_macro SET_PA]
description: Set Pressure Advance with fully dynamic scaling based on nozzle and flow
variable_pa: 0.04

# === OVERVIEW ===
# Fully dynamic Pressure Advance tuning:
# - Uses nozzle diameter from printer.cfg
# - Scales PA by nozzle and flow ratio
# - Automatically sets EXP (flow exponent) as 2x nozzle
# - Dynamically sets SMOOTH_TIME unless overridden
#
# === HOW TO USE ===
# SET_PA PA=<base_value> [FLOW=<actual_mm3/s>] [MAX_FLOW=<max_mm3/s>] [SMOOTH=<value>] [EXP=<value>]
#
# Example:
#   SET_PA PA=0.05 FLOW=30 MAX_FLOW=70
#   SET_PA PA=0.05     ; uses defaults (FLOW=10, MAX_FLOW=15)

gcode:
    {% set base_pa   = params.PA|float %}
    {% set flow      = params.FLOW|default(10.0)|float %}
    {% set max_flow  = params.MAX_FLOW|default(15.0)|float %}
    {% set nozzle    = printer.extruder.nozzle_diameter|float %}

    # === Scale PA based on nozzle diameter ===
    {% if nozzle <= 0.2 %}
        {% set nozzle_scale = 1.8 %}
    {% elif nozzle <= 0.3 %}
        {% set nozzle_scale = 1.4 %}
    {% elif nozzle <= 0.4 %}
        {% set nozzle_scale = 1.0 %}
    {% elif nozzle <= 0.6 %}
        {% set nozzle_scale = 0.75 %}
    {% elif nozzle <= 0.8 %}
        {% set nozzle_scale = 0.5 %}
    {% else %}
        {% set nozzle_scale = 0.4 %}
    {% endif %}
    {% set scaled_pa = base_pa * nozzle_scale %}

    # === Calculate exponent from nozzle size unless overridden ===
    {% set exp = params.EXP|default(2.0 * nozzle)|float %}

    # === Flow ratio and flow scale ===
    {% set flow_ratio = flow / max_flow %}
    {% set flow_scale = flow_ratio ** exp %}
    {% set adjusted_pa = scaled_pa * flow_scale %}

    # === Dynamic smoothing time unless overridden ===
    {% if 'SMOOTH' in params %}
        {% set smooth = params.SMOOTH|float %}
        {% set smooth_source = "manual" %}
    {% else %}
        {% if nozzle <= 0.3 %}
            {% set smooth = 0.03 %}
        {% elif nozzle <= 0.4 %}
            {% set smooth = 0.04 %}
        {% elif nozzle <= 0.6 %}
            {% set smooth = 0.045 %}
        {% elif nozzle <= 0.8 %}
            {% set smooth = 0.055 %}
        {% else %}
            {% set smooth = 0.065 %}
        {% endif %}
        {% set smooth_source = "dynamic" %}
    {% endif %}

    # === Set and store final values ===
    SET_PRESSURE_ADVANCE ADVANCE={adjusted_pa} SMOOTH_TIME={smooth}
    SET_GCODE_VARIABLE MACRO=SET_PA VARIABLE=pa VALUE={adjusted_pa}

    # === Logging ===
    {% set msg = "📐 PA scaled | Nozzle: " ~ nozzle|string ~ "mm | Base: " ~ base_pa|string ~ " ➜ x" ~ nozzle_scale|string ~ " ➜ x" ~ flow_scale|string ~ " (flow^" ~ exp|string ~ ") = " ~ adjusted_pa|string ~ " | Smooth: " ~ smooth|string ~ " (" ~ smooth_source ~ ")" %}
    RESPOND MSG="{msg}"