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+# SPDX-FileCopyrightText: 2021 Phillip Burgess for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+"""
+A macro/hotkey program for Adafruit MACROPAD. Macro setups are stored in the
+/macros folder (configurable below), load up just the ones you're likely to
+use. Plug into computer's USB port, use dial to select an application macro
+set, press MACROPAD keys to send key sequences and other USB protocols.
+"""
+
+# pylint: disable=import-error, unused-import, too-few-public-methods
+
+import os
+import time
+import displayio
+import terminalio
+
+import usb_cdc
+import json
+
+#from adafruit_display_shapes.rect import Rect
+#from adafruit_display_text import label
+from adafruit_macropad import MacroPad
+
+from supervisor import runtime
+
+from actions import Action
+import skeleton
+import menu
+
+# CONFIGURABLES ------------------------
+
+MACRO_FOLDER = '/macros'
+
+
+# INITIALIZATION -----------------------
+
+# Do not reload the application when the files are changed
+runtime.autoreload = False
+
+macropad = MacroPad()
+macropad.display.auto_refresh = False
+macropad.pixels.auto_write = False
+
+Action().set_macropad(macropad)
+
+# Load all the macro key setups from .py files in MACRO_FOLDER
+apps = []
+files = os.listdir(MACRO_FOLDER)
+files.sort()
+for filename in files:
+    if filename.startswith('._'):
+        continue
+    if filename.endswith('.py'):
+        module_name = filename[:-3]
+    elif  filename.endswith('.mpy'):
+        module_name = filename[:-4]
+    else:
+        continue
+
+    try:
+        module = __import__(MACRO_FOLDER + '/' + module_name)
+        apps.append(module.configuration)
+    except (SyntaxError, ImportError, AttributeError, KeyError, NameError,
+            IndexError, TypeError) as err:
+        print("ERROR in", filename)
+        import traceback
+        traceback.print_exception(err, err, err.__traceback__)
+
+if not apps:
+    group[13].text = 'NO MACRO FILES FOUND'
+    macropad.display.refresh()
+    while True:
+        pass
+
+app_index = 0
+
+def run_application(app):
+    # Read encoder position. If it's changed, declare it as a button.
+    position = app.macropad.encoder
+    if position > app.position:
+        app.position = position
+        key_number = 12
+        pressed = True
+    elif position < app.position:
+        app.position = position
+        key_number = 13
+        pressed = True
+    else:
+        event = app.macropad.keys.events.get()
+        if not event:
+            app.tick()
+            return # No key events
+        key_number = event.key_number
+        pressed = event.pressed
+
+    return app.execute_action(key_number, pressed or False)
+
+def switch_layout(configuration):
+    global app
+    app = skeleton.Handler(macropad, configuration)
+    app.start()
+
+
+def search_and_switch(layout):
+    found_application = False
+    for local_app in apps:
+        if local_app.title == layout and app is not local_app:
+            found_application = True
+            switch_layout(local_app)
+            break
+
+def send_layout(_any):
+    if usb_cdc.data.connected:
+        usb_cdc.data.write(bytes("%s\n" % app.name, "utf-8"))
+
+actions = {
+    "layout" : search_and_switch,
+    "get_layout" : send_layout,
+  }
+
+switch_layout(apps[app_index])
+
+# MAIN LOOP ----------------------------
+
+while True:
+
+    # First read from the serial
+    # If we have an application name from the command line, switch to this app.
+    if usb_cdc.data.connected and usb_cdc.data.in_waiting != 0:
+        line = usb_cdc.data.read(usb_cdc.data.in_waiting).strip()
+        commands = json.loads(line)
+        for command in commands:
+            for key, value in command.items():
+                actions[key](value)
+        continue
+
+    # Handle encoder button. If state has changed, and if there's a
+    # corresponding macro, set up variables to act on this just like
+    # the keypad keys, as if it were a 13th key/macro.
+    app.macropad.encoder_switch_debounced.update()
+    encoder_switch = app.macropad.encoder_switch_debounced.pressed
+    # On the encoder button, switch to the next mode
+    if encoder_switch:
+
+        config = menu.build_application(apps)
+        menu_app = skeleton.Handler(macropad, config)
+        menu_app.start()
+        while True:
+            configuration = run_application(menu_app)
+            if configuration is None: continue
+            switch_layout(configuration)
+            break
+        send_layout(None)
+
+    run_application(app)
+    continue