# SPDX-License-Identifier: GPL-2.0-or-later
import logging
import os
import time
from logging.handlers import RotatingFileHandler

from PyQt5.QtCore import QCoreApplication, QStandardPaths
from PyQt5.QtGui import QPalette
from PyQt5.QtWidgets import QApplication

from hidproxy import hid
from keycodes import Keycode
from keymaps import KEYMAPS

tr = QCoreApplication.translate

# For Vial keyboard
VIAL_SERIAL_NUMBER_MAGIC = "vial:f64c2b3c"

# For bootloader
VIBL_SERIAL_NUMBER_MAGIC = "vibl:d4f8159c"

MSG_LEN = 32

# these should match what we have in vial-qmk/keyboards/vial_example
# so that people don't accidentally reuse a sample keyboard UID
EXAMPLE_KEYBOARDS = [
    0xD4A36200603E3007,  # vial_stm32f103_vibl
    0x32F62BC2EEF2237B,  # vial_atmega32u4
    0x38CEA320F23046A5,  # vial_stm32f072
]


def hid_send(dev, msg, retries=1):
    if len(msg) > MSG_LEN:
        raise RuntimeError("message must be less than 32 bytes")
    msg += b"\x00" * (MSG_LEN - len(msg))

    data = b""
    first = True

    while retries > 0:
        retries -= 1
        if not first:
            time.sleep(0.5)
        first = False
        try:
            # add 00 at start for hidapi report id
            if dev.write(b"\x00" + msg) != MSG_LEN + 1:
                continue

            data = bytes(dev.read(MSG_LEN, timeout_ms=500))
            if not data:
                continue
        except OSError:
            continue
        break

    if not data:
        raise RuntimeError("failed to communicate with the device")
    return data


def is_rawhid(desc):
    if desc["usage_page"] != 0xFF60 or desc["usage"] != 0x61:
        logging.warning("is_rawhid: {} does not match - usage_page={:04X} usage={:02X}".format(
            desc["path"], desc["usage_page"], desc["usage"]))
        return False

    dev = hid.device()

    try:
        dev.open_path(desc["path"])
    except OSError as e:
        logging.warning("is_rawhid: {} does not match - open_path error {}".format(desc["path"], e))
        return False

    # probe VIA version and ensure it is supported
    data = b""
    try:
        data = hid_send(dev, b"\x01", retries=3)
    except RuntimeError as e:
        logging.warning("is_rawhid: {} does not match - hid_send error {}".format(desc["path"], e))
        pass
    dev.close()

    # must have VIA protocol version = 9
    if data[0:3] != b"\x01\x00\x09":
        logging.warning("is_rawhid: {} does not match - unexpected data in response {}".format(
            desc["path"], data.hex()))
        return False

    logging.info("is_rawhid: {} matched OK".format(desc["path"]))
    return True


def find_vial_devices(via_stack_json, sideload_vid=None, sideload_pid=None):
    from vial_device import VialBootloader, VialKeyboard, VialDummyKeyboard

    filtered = []
    for dev in hid.enumerate():
        if dev["vendor_id"] == sideload_vid and dev["product_id"] == sideload_pid:
            logging.info("Trying VID={:04X}, PID={:04X}, serial={}, path={} - sideload".format(
                dev["vendor_id"], dev["product_id"], dev["serial_number"], dev["path"]
            ))
            if is_rawhid(dev):
                filtered.append(VialKeyboard(dev, sideload=True))
        elif VIAL_SERIAL_NUMBER_MAGIC in dev["serial_number"]:
            logging.info("Matching VID={:04X}, PID={:04X}, serial={}, path={} - vial serial magic".format(
                dev["vendor_id"], dev["product_id"], dev["serial_number"], dev["path"]
            ))
            if is_rawhid(dev):
                filtered.append(VialKeyboard(dev))
        elif VIBL_SERIAL_NUMBER_MAGIC in dev["serial_number"]:
            logging.info("Matching VID={:04X}, PID={:04X}, serial={}, path={} - vibl serial magic".format(
                dev["vendor_id"], dev["product_id"], dev["serial_number"], dev["path"]
            ))
            filtered.append(VialBootloader(dev))
        elif str(dev["vendor_id"] * 65536 + dev["product_id"]) in via_stack_json["definitions"]:
            logging.info("Matching VID={:04X}, PID={:04X}, serial={}, path={} - VIA stack".format(
                dev["vendor_id"], dev["product_id"], dev["serial_number"], dev["path"]
            ))
            if is_rawhid(dev):
                filtered.append(VialKeyboard(dev, via_stack=True))

    if sideload_vid == sideload_pid == 0:
        filtered.append(VialDummyKeyboard())

    return filtered


def chunks(data, sz):
    for i in range(0, len(data), sz):
        yield data[i:i+sz]


def pad_for_vibl(msg):
    """ Pads message to vibl fixed 64-byte length """
    if len(msg) > 64:
        raise RuntimeError("vibl message too long")
    return msg + b"\x00" * (64 - len(msg))


def init_logger():
    logging.basicConfig(level=logging.INFO)
    directory = QStandardPaths.writableLocation(QStandardPaths.AppLocalDataLocation)
    if not os.path.exists(directory):
        os.mkdir(directory)
    path = os.path.join(directory, "vial.log")
    handler = RotatingFileHandler(path, maxBytes=5 * 1024 * 1024, backupCount=5)
    handler.setFormatter(logging.Formatter("%(asctime)s - %(levelname)s - %(module)s:%(lineno)d - %(message)s"))
    logging.getLogger().addHandler(handler)


class KeycodeDisplay:

    keymap_override = KEYMAPS[0][1]
    clients = []

    @classmethod
    def get_label(cls, code):
        """ Get label for a specific keycode """
        if cls.code_is_overriden(code):
            return cls.keymap_override[Keycode.find_outer_keycode(code).qmk_id]
        return Keycode.label(code)

    @classmethod
    def code_is_overriden(cls, code):
        """ Check whether a country-specific keymap overrides a code """
        key = Keycode.find_outer_keycode(code)
        return key is not None and key.qmk_id in cls.keymap_override

    @classmethod
    def display_keycode(cls, widget, code):
        text = cls.get_label(code)
        tooltip = Keycode.tooltip(code)
        mask = Keycode.is_mask(code)
        mask_text = cls.get_label(code & 0xFF)
        if mask:
            text = text.split("\n")[0]
        widget.masked = mask
        widget.setText(text)
        widget.setMaskText(mask_text)
        widget.setToolTip(tooltip)
        if cls.code_is_overriden(code):
            widget.setColor(QApplication.palette().color(QPalette.Link))
        else:
            widget.setColor(None)

    @classmethod
    def set_keymap_override(cls, override):
        cls.keymap_override = override
        for client in cls.clients:
            client.on_keymap_override()

    @classmethod
    def notify_keymap_override(cls, client):
        cls.clients.append(client)
        client.on_keymap_override()