# Copyright (C) 2008-2022 The Paparazzi Team
# released under GNU GPLv2 or later. See COPYING file.
from PyQt5.QtWidgets import *
from PyQt5 import QtCore
from generated.ui_build import Ui_Build
import lxml.etree as ET
import os
import utils
from conf import Aircraft, Conf
from typing import List, Dict
from dataclasses import dataclass, field
import re


@dataclass
class FlashMode:
    name: str
    vars: Dict[str, str] = field(default_factory=dict)
    boards: List[str] = field(default_factory=list)

    def match(self, board):
        for regex in self.boards:
            if re.match(regex, board) is not None:
                return True
        return False


class BuildWidget(Ui_Build, QWidget):

    spawn_program = QtCore.pyqtSignal(str, list, str, object)
    refresh_ac = QtCore.pyqtSignal(object)

    def __init__(self, parent=None):
        QWidget.__init__(self, parent=parent)
        self.setupUi(self)
        # uic.loadUi("ui/build.ui", self)
        self.ac: Aircraft = None
        self.conf: Conf = None      # to save conf before building
        self.flash_modes: List[FlashMode] = self.parse_flash_modes()
        self.build_button.clicked.connect(self.build)
        self.clean_button.clicked.connect(self.clean)
        self.flash_button.clicked.connect(self.flash)
        self.target_combo.currentTextChanged.connect(self.update_flash_mode)

    def set_conf(self, conf: Conf):
        self.conf = conf

    @staticmethod
    def parse_flash_modes() -> List[FlashMode]:
        flash_xml = ET.parse(os.path.join(utils.CONF_DIR, "flash_modes.xml"))
        modes = []
        for xml_mode in flash_xml.getroot().findall("mode"):
            mode_name = xml_mode.get("name")
            vars = {}
            for xml_var in xml_mode.findall("variable"):
                var_name = xml_var.get("name")
                var_value = xml_var.get("value")
                vars[var_name] = var_value
            mode = FlashMode(mode_name, vars)
            for xml_board in xml_mode.find("boards").findall("board"):
                board = xml_board.get("name")
                mode.boards.append(board)
            modes.append(mode)
        return modes

    def get_flash_modes(self, board):
        modes = filter(lambda fm: fm.match(board), self.flash_modes)
        mode_names = [mode.name for mode in modes]
        return mode_names

    def update_targets(self, ac: Aircraft):
        self.ac = ac
        self.target_combo.clear()

        for target in ac.boards.keys():
            self.target_combo.addItem(target)
        last_target = utils.get_settings().value("ui/last_target", None, str)
        if last_target is not None and last_target in ac.boards.keys():
            self.target_combo.setCurrentText(last_target)

    def update_flash_mode(self, target):
        self.device_combo.clear()
        if target != "":
            self.device_combo.addItem("Default")
            board = self.ac.boards[target]
            flash_modes = self.get_flash_modes(board)
            self.device_combo.addItems(flash_modes)
            last_flash_mode = utils.get_settings().value("ui/last_flash_mode", None, str)
            if last_flash_mode in flash_modes:
                self.device_combo.setCurrentText(last_flash_mode)

    def get_current_target(self) -> str:
        return self.target_combo.currentText()

    def build(self):
        target = self.target_combo.currentText()
        cmd = ["make", "-C", utils.PAPARAZZI_HOME, "-f", "Makefile.ac",
               "AIRCRAFT={}".format(self.ac.name), "{}.compile".format(target)]
        if self.print_config_checkbox.isChecked():
            cmd.append("PRINT_CONFIG=1")
        shortname = "Build {}".format(self.ac.name)
        self.refresh_ac.emit(self.ac)
        self.conf.save(False)
        self.target_combo.setCurrentText(target)
        self.enable_buttons(False)
        utils.get_settings().setValue("ui/last_target", target)
        self.spawn_program.emit(shortname, cmd, None, lambda: self.enable_buttons(True))

    def clean(self):
        cmd = ["make", "-C", utils.PAPARAZZI_HOME, "-f", "Makefile.ac",
               "AIRCRAFT={}".format(self.ac.name), "clean_ac"]
        shortname = "Clean {}".format(self.ac.name)
        self.enable_buttons(False)
        self.spawn_program.emit(shortname, cmd, None, lambda: self.enable_buttons(True))

    def flash(self):
        target = self.target_combo.currentText()
        vars = []
        flash_mode = self.device_combo.currentText()
        if flash_mode != "Default":
            for mode in self.flash_modes:
                if mode.name == flash_mode:
                    vars = ["{}={}".format(var_name, var_value) for (var_name, var_value) in mode.vars.items()]
                    break
            else:
                raise Exception("Flash mode {} not found!".format(flash_mode))
        cmd = ["make", "-C", utils.PAPARAZZI_HOME, "-f", "Makefile.ac",
               "AIRCRAFT={}".format(self.ac.name)] + vars + ["{}.upload".format(target)]
        shortname = "Flash {}".format(self.ac.name)
        utils.get_settings().setValue("ui/last_flash_mode", flash_mode)
        self.spawn_program.emit(shortname, cmd, None, None)

    def enable_buttons(self, enable: bool):
        self.build_button.setEnabled(enable)
        self.clean_button.setEnabled(enable)