# Copyright (C) Ivan Kravets <me@ikravets.com>
# See LICENSE for details.

"""
    Builder for Atmel AVR series of microcontrollers
"""

from os.path import join
from time import sleep

from SCons.Script import (COMMAND_LINE_TARGETS, AlwaysBuild, Default,
                          DefaultEnvironment, Exit, SConscript)

from platformio.util import get_serialports


def before_upload(target, source, env):  # pylint: disable=W0613,W0621

    def _autodetect_upload_port():
        if "UPLOAD_PORT" not in env:
            for item in get_serialports():
                if "VID:PID" in item['hwid']:
                    print "Auto-detected UPLOAD_PORT: %s" % item['port']
                    env.Replace(UPLOAD_PORT=item['port'])
                    break

        if "UPLOAD_PORT" not in env:
            Exit("Error: Please specify `upload_port` for environment or use "
                 "global `--upload-port` option.\n")

    def _rpi_sysgpio(path, value):
        with open(path, "w") as f:
            f.write(str(value))

    if env.subst("$UPLOAD_PROTOCOL") != "usbtiny":
        _autodetect_upload_port()

    if env.subst("$BOARD") == "raspduino":
        _rpi_sysgpio("/sys/class/gpio/export", 18)
        _rpi_sysgpio("/sys/class/gpio/gpio18/direction", "out")
        _rpi_sysgpio("/sys/class/gpio/gpio18/value", 1)
        sleep(0.1)
        _rpi_sysgpio("/sys/class/gpio/gpio18/value", 0)
        _rpi_sysgpio("/sys/class/gpio/unexport", 18)
    else:
        upload_options = env.get("BOARD_OPTIONS", {}).get("upload", {})

        if not upload_options.get("disable_flushing", False):
            env.FlushSerialBuffer("$UPLOAD_PORT")

        before_ports = [i['port'] for i in get_serialports()]

        if (upload_options.get("use_1200bps_touch", False) and
                "UPLOAD_PORT" in env):
            env.TouchSerialPort("$UPLOAD_PORT", 1200)

        if upload_options.get("wait_for_upload_port", False):
            env.Replace(UPLOAD_PORT=env.WaitForNewSerialPort(before_ports))


env = DefaultEnvironment()
env = SConscript(env.subst(join("$PIOBUILDER_DIR", "scripts", "baseavr.py")),
                 exports="env")

env.Replace(
    UPLOADER=join("$PIOPACKAGES_DIR", "tool-avrdude", "avrdude"),
    UPLOADERFLAGS=[
        "-q",  # suppress progress output
        "-D",  # disable auto erase for flash memory
        "-p", "$BOARD_MCU",
        "-C",
        '"%s"' % join("$PIOPACKAGES_DIR", "tool-avrdude", "avrdude.conf"),
        "-c", "$UPLOAD_PROTOCOL"
    ],

    UPLOADHEXCMD='"$UPLOADER" $UPLOADERFLAGS -U flash:w:$SOURCES:i',
    UPLOADEEPCMD='"$UPLOADER" $UPLOADERFLAGS -U eeprom:w:$SOURCES:i'
)

CORELIBS = env.ProcessGeneral()

#
# Target: Build executable and linkable firmware
#

target_elf = env.BuildFirmware(["m"] + CORELIBS)

#
# Target: Extract EEPROM data (from EEMEM directive) to .eep file
#

target_eep = env.Alias("eep", env.ElfToEep(join("$BUILD_DIR", "firmware"),
                                           target_elf))

#
# Target: Build the .hex file
#

if "uploadlazy" in COMMAND_LINE_TARGETS:
    target_firm = join("$BUILD_DIR", "firmware.hex")
else:
    target_firm = env.ElfToHex(join("$BUILD_DIR", "firmware"), target_elf)

#
# Target: Print binary size
#

target_size = env.Alias("size", target_elf, "$SIZEPRINTCMD")
AlwaysBuild(target_size)

#
# Target: Upload by default .hex file
#

upload = env.Alias(["upload", "uploadlazy"], target_firm, [
    before_upload, "$UPLOADHEXCMD"])
AlwaysBuild(upload)

#
# Target: Upload .eep file
#

uploadeep = env.Alias("uploadeep", target_eep, [
    before_upload, "$UPLOADEEPCMD"])
AlwaysBuild(uploadeep)

#
# Setup default targets
#

Default([target_firm, target_size])