import subprocess
from collections.abc import Iterable
from subprocess import Popen

from PyQt5.QtCore import Qt
from PyQt5.QtGui import QIcon, QCursor
from PyQt5.QtWidgets import QDialog, QVBoxLayout, QGroupBox, \
    QLineEdit, QLabel, QGridLayout, QPushButton, QPlainTextEdit, QScrollArea, QFrame, QWidget, QSizePolicy, \
    QHBoxLayout

from bauh.api.abstract.cache import MemoryCache
from bauh.commons.regex import RE_URL
from bauh.view.qt.components import new_spacer
from bauh.view.qt.qt_utils import get_current_screen_geometry
from bauh.view.util.translation import I18n

IGNORED_ATTRS = {'name', '__app__'}


class InfoDialog(QDialog):

    def __init__(self, pkg_info: dict, icon_cache: MemoryCache, i18n: I18n):
        super(InfoDialog, self).__init__()
        self.setWindowTitle(str(pkg_info['__app__']))
        self.i18n = i18n
        layout = QVBoxLayout()
        self.setLayout(layout)

        scroll = QScrollArea(self)
        scroll.setFrameShape(QFrame.NoFrame)
        scroll.setWidgetResizable(True)
        comps_container = QWidget()
        comps_container.setObjectName('root_container')
        comps_container.setLayout(QVBoxLayout())
        scroll.setWidget(comps_container)

        # shows complete field string
        self.text_field = QPlainTextEdit()
        self.text_field.setObjectName('full_field')
        self.text_field.setReadOnly(True)
        comps_container.layout().addWidget(self.text_field)
        self.text_field.hide()

        self.gbox_info = QGroupBox()
        self.gbox_info.setObjectName('fields')
        self.gbox_info.setLayout(QGridLayout())

        comps_container.layout().addWidget(self.gbox_info)

        # THERE ARE CRASHES WITH SOME RARE ICONS ( like insomnia ). IT CAN BE A QT BUG. IN THE MEANTIME, ONLY THE TYPE ICON WILL BE RENDERED
        #
        # icon_data = icon_cache.get(app['__app__'].model.icon_url)
        #
        # if icon_data and icon_data.get('icon'):
        #     self.setWindowIcon(icon_data.get('icon'))
        self.setWindowIcon(QIcon(pkg_info['__app__'].model.get_type_icon_path()))

        for idx, attr in enumerate(sorted(pkg_info.keys())):
            if attr not in IGNORED_ATTRS and pkg_info[attr] is not None:
                i18n_key = pkg_info['__app__'].model.gem_name + '.info.' + attr.lower()
                val = pkg_info[attr]

                if not isinstance(val, str) and isinstance(pkg_info[attr], Iterable):
                    val = ' '.join([str(e).strip() for e in pkg_info[attr] if e])
                    show_val = '\n'.join(['* ' + str(e).strip() for e in pkg_info[attr] if e])
                else:
                    val = str(pkg_info[attr]).strip()
                    show_val = val

                i18n_val = i18n.get(f"{i18n_key}.{val.lower()}")

                if i18n_val:
                    val = i18n_val
                    show_val = val

                text = QLineEdit()
                text.setObjectName('field_value')
                text.setToolTip(show_val)
                text.setText(val)
                text.setCursorPosition(0)
                text.setReadOnly(True)

                label = QLabel(i18n.get(i18n_key, i18n.get(attr.lower(), attr)).capitalize())
                label.setObjectName('field_name')

                self.gbox_info.layout().addWidget(label, idx, 0)
                self.gbox_info.layout().addWidget(text, idx, 1)

                self._gen_show_button(idx=idx, val=show_val)

        layout.addWidget(scroll)

        lower_container = QWidget()
        lower_container.setObjectName('lower_container')
        lower_container.setSizePolicy(QSizePolicy.Minimum, QSizePolicy.Fixed)
        lower_container.setLayout(QHBoxLayout())

        self.bt_back = QPushButton('< {}'.format(self.i18n['back'].capitalize()))
        self.bt_back.setObjectName('back')
        self.bt_back.setVisible(False)
        self.bt_back.setCursor(QCursor(Qt.PointingHandCursor))
        self.bt_back.clicked.connect(self.back_to_info)

        lower_container.layout().addWidget(self.bt_back)
        lower_container.layout().addWidget(new_spacer())

        self.bt_close = QPushButton(self.i18n['close'].capitalize())
        self.bt_close.setObjectName('close')
        self.bt_close.setCursor(QCursor(Qt.PointingHandCursor))
        self.bt_close.clicked.connect(self.close)

        lower_container.layout().addWidget(self.bt_close)
        layout.addWidget(lower_container)
        self.setMinimumWidth(int(self.gbox_info.sizeHint().width() * 1.2))

        screen_height = get_current_screen_geometry().height()
        self.setMaximumHeight(int(screen_height * 0.8))
        self.adjustSize()

    @staticmethod
    def open_url(url: str):
        Popen(["xdg-open", url], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL, stdin=subprocess.DEVNULL)

    def _show_full_field_val(self, val: str):
        self.gbox_info.hide()
        self.bt_back.setVisible(True)
        self.text_field.show()
        self.text_field.setPlainText(val)

    def _gen_show_button(self, idx: int, val: str):

        is_url = bool(RE_URL.match(val)) if val else False

        if is_url:
            bt_label = self.i18n["manage_window.info.open_url"]

            def _show_field():
                self.open_url(val)
        else:
            bt_label = self.i18n["show"].capitalize()

            def _show_field():
                self._show_full_field_val(val)

        bt_full_field = QPushButton(bt_label)
        bt_full_field.setObjectName("show")
        bt_full_field.setCursor(QCursor(Qt.PointingHandCursor))
        bt_full_field.clicked.connect(_show_field)
        self.gbox_info.layout().addWidget(bt_full_field, idx, 2)

    def back_to_info(self):
        self.text_field.setPlainText("")
        self.text_field.hide()
        self.gbox_info.show()
        self.bt_back.setVisible(False)