#-*- coding:utf-8 -*-
#
# Copyright © 2016–2017 sthoo <sth201807@gmail.com>
#
# Support: Report an issue at https://github.com/sth2018/FastWordQuery/issues
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# any later version; http://www.gnu.org/copyleft/gpl.html.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.

import os
import sys
import json
from collections import namedtuple

import anki
import aqt
import aqt.models
from aqt import mw
from PyQt4 import QtCore, QtGui
from aqt.studydeck import StudyDeck
from aqt.utils import shortcut, showInfo
from .constants import VERSION, Endpoint, Template
from .context import APP_ICON, config
from .lang import _, _sl
from .service import service_manager, service_pool
from .utils import MapDict, get_icon, get_model_byId, get_ord_from_fldname


__all__ = ['WIDGET_SIZE', 'Dialog', 'ParasDialog', 
    'FoldersManageDialog', 'OptionsDialog', 'check_updates',
    'show_options', 'show_fm_dialog'
]


class WIDGET_SIZE:
    dialog_width = 650 
    dialog_height_margin = 120 
    map_min_height = 0
    map_max_height = 31
    map_fld_width = 100
    map_dictname_width = 130
    map_dictfield_width = 130


class Dialog(QtGui.QDialog):
    '''
    Base used for all dialog windows.
    '''

    def __init__(self, parent, title):
        '''
        Set the modal status for the dialog, sets its layout to the
        return value of the _ui() method, and sets a default title.
        '''

        self._title = title
        self._parent = parent
        super(Dialog, self).__init__(parent)

        self.setModal(True)
        self.setWindowFlags(
            self.windowFlags() &
            ~QtCore.Qt.WindowContextHelpButtonHint
        )
        self.setWindowIcon(APP_ICON)
        self.setWindowTitle(
            title if "FastWQ" in title
            else "FastWQ - " + title
        )


class ParasDialog(Dialog):
    '''
    Setting window, some golbal params for query function.
    '''

    def __init__(self, parent, title=u'Setting'):
        super(ParasDialog, self).__init__(parent, title)
        self.setFixedWidth(400)
        self.check_force_update = None
        self.input_thread_number = None
        self.build()

    def build(self):
        layout = QtGui.QVBoxLayout()

        check_force_update = QtGui.QCheckBox(_("FORCE_UPDATE"))
        check_force_update.setChecked(config.force_update)
        layout.addWidget(check_force_update)
        layout.addSpacing(10)

        check_ignore_accents = QtGui.QCheckBox(_("IGNORE_ACCENTS"))
        check_ignore_accents.setChecked(config.ignore_accents)
        layout.addWidget(check_ignore_accents)
        layout.addSpacing(10)

        hbox = QtGui.QHBoxLayout()
        input_thread_number = QtGui.QSpinBox(parent=self)
        input_thread_number.setRange(1, 120)
        input_thread_number.setValue(config.thread_number)
        input_label = QtGui.QLabel(_("THREAD_NUMBER") + ":", parent=self)
        hbox.addWidget(input_label)
        hbox.setStretchFactor(input_label, 1)
        hbox.addWidget(input_thread_number)
        hbox.setStretchFactor(input_thread_number, 2)
        layout.addLayout(hbox)

        buttonBox = QtGui.QDialogButtonBox(parent=self)
        buttonBox.setStandardButtons(QtGui.QDialogButtonBox.Ok)
        buttonBox.accepted.connect(self.accept) # 确定
        
        layout.addSpacing(48)
        layout.addWidget(buttonBox)
        
        self.check_force_update = check_force_update
        self.check_ignore_accents = check_ignore_accents
        self.input_thread_number = input_thread_number

        layout.setAlignment(QtCore.Qt.AlignTop|QtCore.Qt.AlignLeft)
        self.setLayout(layout)

    def accept(self):
        self.save()
        self.close()
    
    def save(self):
        data = {
            'force_update': self.check_force_update.isChecked(),
            'ignore_accents': self.check_ignore_accents.isChecked(),
            'thread_number': self.input_thread_number.value()
        }
        config.update(data)


class FoldersManageDialog(Dialog):
    '''
    Dictionary folder manager window. add or remove dictionary folders.
    '''

    def __init__(self, parent, title=u'Dictionary Folder Manager'):
        super(FoldersManageDialog, self).__init__(parent, title)
        self._dict_paths = []
        self.build()

    def build(self):
        layout = QtGui.QVBoxLayout()
        btn_layout = QtGui.QHBoxLayout()
        add_btn = QtGui.QPushButton("+")
        remove_btn = QtGui.QPushButton("-")
        btn_layout.addWidget(add_btn)
        btn_layout.addWidget(remove_btn)
        add_btn.clicked.connect(self.add_folder)
        remove_btn.clicked.connect(self.remove_folder)
        self.folders_lst = QtGui.QListWidget()
        self.folders_lst.addItems(config.dirs)
        self.chk_use_filename = QtGui.QCheckBox(_('CHECK_FILENAME_LABEL'))
        self.chk_export_media = QtGui.QCheckBox(_('EXPORT_MEDIA'))
        self.chk_use_filename.setChecked(config.use_filename)
        self.chk_export_media.setChecked(config.export_media)
        chk_layout = QtGui.QHBoxLayout()
        chk_layout.addWidget(self.chk_use_filename)
        chk_layout.addWidget(self.chk_export_media)
        btnbox = QtGui.QDialogButtonBox(QtGui.QDialogButtonBox.Ok, QtCore.Qt.Horizontal, self)
        btnbox.accepted.connect(self.accept)
        layout.addLayout(btn_layout)
        layout.addWidget(self.folders_lst)
        layout.addLayout(chk_layout)
        layout.addWidget(btnbox)
        self.setLayout(layout)

    def add_folder(self):
        dir_ = QtGui.QFileDialog.getExistingDirectory(
            self,
            caption=u"Select Folder", 
            directory=config.last_folder, 
            options=QtGui.QFileDialog.ShowDirsOnly | QtGui.QFileDialog.DontResolveSymlinks
        )
        if dir_:
            self.folders_lst.addItem(dir_)
            config.update({'last_folder': dir_})

    def remove_folder(self):
        item = self.folders_lst.takeItem(self.folders_lst.currentRow())
        del item

    def find_mdxes(self):
        for each in self.dirs:
            for dirpath, dirnames, filenames in os.walk(each):
                self._dict_paths.extend([os.path.join(dirpath, filename)
                                         for filename in filenames if filename.lower().endswith(u'.mdx')])
        return list(set(self._dict_paths))

    @property
    def dict_paths(self):
        return self.find_mdxes()

    @property
    def dirs(self):
        return [self.folders_lst.item(i).text()
                for i in range(self.folders_lst.count())]

    def save(self):
        data = {
            'dirs': self.dirs,
            'use_filename': self.chk_use_filename.isChecked(),
            'export_media': self.chk_export_media.isChecked()
        }
        config.update(data)


class OptionsDialog(Dialog):
    '''
    query options window
    setting query dictionary and fileds
    '''

    __slot__ = [
        'begore_build',
        'after_build'
    ]

    def __init__(self, parent, browser=None, title=u'Options'):
        super(OptionsDialog, self).__init__(parent, title)
        self.browser = browser
        self.connect(self, QtCore.SIGNAL('before_build'), self._before_build, QtCore.Qt.QueuedConnection)
        self.connect(self, QtCore.SIGNAL('after_build'), self._after_build, QtCore.Qt.QueuedConnection)
        # initlizing info
        self.main_layout = QtGui.QVBoxLayout()
        self.loading_label = QtGui.QLabel(_('INITLIZING_DICT'))
        self.main_layout.addWidget(self.loading_label, 0, QtCore.Qt.AlignCenter)
        #self.loading_layout.addLayout(models_layout)
        self.setLayout(self.main_layout)
        #initlize properties
        self.___last_checkeds___ = None
        self.___options___ = list()
        # size and signal
        self.resize(WIDGET_SIZE.dialog_width, 4 * WIDGET_SIZE.map_max_height + WIDGET_SIZE.dialog_height_margin)
        self.emit(QtCore.SIGNAL('before_build'), self.browser)
    
    def _before_build(self, browser=None):
        for cls in service_manager.services:
            service = service_pool.get(cls.__unique__)
        self.emit(QtCore.SIGNAL('after_build'), browser)

    def _after_build(self, browser=None):
        self.main_layout.removeWidget(self.loading_label)
        models_layout = QtGui.QHBoxLayout()
        # add buttons
        mdx_button = QtGui.QPushButton(_('DICTS_FOLDERS'))
        mdx_button.clicked.connect(self.show_fm_dialog)
        self.models_button = QtGui.QPushButton(_('CHOOSE_NOTE_TYPES'))
        self.models_button.clicked.connect(self.btn_models_pressed)
        models_layout.addWidget(mdx_button)
        models_layout.addWidget(self.models_button)
        self.main_layout.addLayout(models_layout)
        # add dicts mapping
        dicts_widget = QtGui.QWidget()
        self.dicts_layout = QtGui.QGridLayout()
        self.dicts_layout.setSizeConstraint(QtGui.QLayout.SetMinAndMaxSize)
        dicts_widget.setLayout(self.dicts_layout)

        scroll_area = QtGui.QScrollArea()
        scroll_area.setWidgetResizable(True)
        scroll_area.setWidget(dicts_widget)

        self.main_layout.addWidget(scroll_area)
        # add description of radio buttons AND ok button
        bottom_layout = QtGui.QHBoxLayout()
        paras_btn = QtGui.QPushButton(_('SETTINGS'))
        paras_btn.clicked.connect(self.show_paras)
        about_btn = QtGui.QPushButton(_('ABOUT'))
        about_btn.clicked.connect(self.show_about)
        # about_btn.clicked.connect(self.show_paras)
        chk_update_btn = QtGui.QPushButton(_('UPDATE'))
        chk_update_btn.clicked.connect(check_updates)
        home_label = QtGui.QLabel(
            '<a href="{url}">User Guide</a>'.format(url=Endpoint.user_guide))
        home_label.setOpenExternalLinks(True)
        # shop_label = QLabel(
        #     '<a href="{url}">Service Shop</a>'.format(url=Endpoint.service_shop))
        # shop_label.setOpenExternalLinks(True)
        btnbox = QtGui.QDialogButtonBox(QtGui.QDialogButtonBox.Ok, QtCore.Qt.Horizontal, self)
        btnbox.accepted.connect(self.accept)
        bottom_layout.addWidget(paras_btn)
        bottom_layout.addWidget(chk_update_btn)
        bottom_layout.addWidget(about_btn)
        bottom_layout.addWidget(home_label)
        # bottom_layout.addWidget(shop_label)
        bottom_layout.addWidget(btnbox)
        #self.setLayout(self.main_layout)
        self.main_layout.addLayout(bottom_layout)
        # init from saved data
        self.current_model = None
        model_id = config.last_model_id
        if browser:
            for note_id in browser.selectedNotes():
                note = browser.mw.col.getNote(note_id)
                model_id = note.model()['id']
                break
        if model_id:
            self.current_model = get_model_byId(mw.col.models, model_id)
        if self.current_model:
            self.models_button.setText(
                u'%s [%s]' % (_('CHOOSE_NOTE_TYPES'),  self.current_model['name']))
            # build fields -- dicts layout
            self.build_mappings_layout(self.current_model)

    def show_paras(self):
        dialog = ParasDialog(self, u'Setting')
        dialog.exec_()

    def show_fm_dialog(self):
        self.save()
        self.close()
        show_fm_dialog(self.browser)

    def show_about(self):
        QtGui.QMessageBox.about(self, _('ABOUT'), Template.tmpl_about)

    def accept(self):
        self.save()
        self.close()

    def btn_models_pressed(self):
        self.save()
        self.current_model = self.show_models()
        if self.current_model:
            self.build_mappings_layout(self.current_model)

    def build_mappings_layout(self, model):

        def clear_layout(layout):
            if layout is not None:
                while layout.count():
                    item = layout.takeAt(0)
                    widget = item.widget()
                    if widget is not None:
                        widget.deleteLater()
                    else:
                        clear_layout(item.layout())

        clear_layout(self.dicts_layout)
        del self.___options___[:]
        self.___last_checkeds___ = None

        labels = ['', '', 'DICTS', 'DICT_FIELDS', '']
        for i, s in enumerate(labels):
            label = QtGui.QLabel(_(s))
            label.setSizePolicy(QtGui.QSizePolicy.Preferred, QtGui.QSizePolicy.Fixed)
            self.dicts_layout.addWidget(label, 0, i)

        maps = config.get_maps(model['id'])
        self.radio_group = QtGui.QButtonGroup()
        for i, fld in enumerate(model['flds']):
            ord = fld['ord']
            name = fld['name']
            if maps:
                for j, each in enumerate(maps):
                    if each.get('fld_ord', -1) == ord:
                        self.add_dict_layout(j, fld_name=name, **each)
                        break
                else:
                    self.add_dict_layout(i, fld_name=name)
            else:
                self.add_dict_layout(i, fld_name=name)

        #self.setLayout(self.main_layout)
        self.resize(WIDGET_SIZE.dialog_width,
                    max(3, (i + 1)) * WIDGET_SIZE.map_max_height + WIDGET_SIZE.dialog_height_margin)
        self.save()

    def show_models(self):
        edit = QtGui.QPushButton(anki.lang._("Manage"),
                           clicked=lambda: aqt.models.Models(mw, self))
        ret = StudyDeck(mw, names=lambda: sorted(mw.col.models.allNames()),
                        accept=anki.lang._("Choose"), title=anki.lang._("Choose Note Type"),
                        help="_notes", parent=self, buttons=[edit],
                        cancel=True, geomKey="selectModel")
        if ret.name:
            model = mw.col.models.byName(ret.name)
            self.models_button.setText(
                u'%s [%s]' % (_('CHOOSE_NOTE_TYPES'), ret.name))
            return model

    def fill_dict_combo_options(self, dict_combo, current_text):
        '''setup dict combo box'''
        dict_combo.clear()
        #dict_combo.addItem(_('NOT_DICT_FIELD'))

        # local dict service
        #dict_combo.insertSeparator(dict_combo.count())
        has_local_service = False
        for cls in service_manager.local_services:
            # combo_data.insert("data", each.label)
            service = service_pool.get(cls.__unique__)
            if service and service.support:
                dict_combo.addItem(
                    service.title, userData=service.unique)
                service_pool.put(service)
                has_local_service = True

        # hr
        if has_local_service:
            dict_combo.insertSeparator(dict_combo.count())
        
        # web dict service
        for cls in service_manager.web_services:
            service = service_pool.get(cls.__unique__)
            if service and service.support:
                dict_combo.addItem(
                    service.title, userData=service.unique)
                service_pool.put(service)

        def set_dict_combo_index():
            #dict_combo.setCurrentIndex(-1)
            dict_combo.setCurrentIndex(0)
            if current_text:
                for i in range(dict_combo.count()):
                    if dict_combo.itemText(i) == current_text:
                        dict_combo.setCurrentIndex(i)
                        break
            
        set_dict_combo_index()

    def fill_field_combo_options(self, field_combo, dict_combo_text, dict_combo_itemdata, field_combo_text):
        '''setup field combobox'''
        field_combo.clear()
        field_combo.setEditable(False)
        #if dict_combo_text in _sl('NOT_DICT_FIELD'):
        #    field_combo.setEnabled(False)
        #el
        if dict_combo_text in _sl('MDX_SERVER'):
            text = field_combo_text if field_combo_text else 'http://'
            field_combo.setEditable(True)
            field_combo.setEditText(text)
            field_combo.setFocus(Qt.MouseFocusReason)  # MouseFocusReason
        else:
            unique = dict_combo_itemdata
            service = service_pool.get(unique)
            # problem
            field_combo.setCurrentIndex(0)
            if service and service.support and service.fields:
                for i, each in enumerate(service.fields):
                    field_combo.addItem(each)
                    if each == field_combo_text:
                        field_combo.setCurrentIndex(i)
            service_pool.put(service)

    def add_dict_layout(self, i, **kwargs):
        """
        kwargs:
        word_checked  dict  fld_name dict_field
        """
        word_checked = i == 0
        dict_name, dict_unique, fld_name, dict_field, ignore, skip = (
            kwargs.get('dict', ''),
            kwargs.get('dict_unique', ''),
            kwargs.get('fld_name', ''),
            kwargs.get('dict_field', ''),
            kwargs.get('ignore', False),
            kwargs.get('skip_valued', False),
        )
        # check
        word_check_btn = QtGui.QRadioButton(fld_name)
        word_check_btn.setMinimumSize(WIDGET_SIZE.map_fld_width, 0)
        word_check_btn.setMaximumSize(
            WIDGET_SIZE.map_fld_width,
            WIDGET_SIZE.map_max_height
        )
        word_check_btn.setSizePolicy(QtGui.QSizePolicy.Fixed, QtGui.QSizePolicy.Fixed)
        word_check_btn.setCheckable(True)
        word_check_btn.setChecked(word_checked)
        self.radio_group.addButton(word_check_btn)
        # dict combox
        dict_combo = QtGui.QComboBox()
        dict_combo.setMinimumSize(WIDGET_SIZE.map_dictname_width, 0)
        dict_combo.setFocusPolicy(
            QtCore.Qt.TabFocus | QtCore.Qt.ClickFocus | QtCore.Qt.StrongFocus | QtCore.Qt.WheelFocus
        )
        dict_combo.setEnabled(not word_checked and not ignore)
        self.fill_dict_combo_options(dict_combo, dict_name)
        dict_unique = dict_combo.itemData(dict_combo.currentIndex())
        # field combox
        field_combo = QtGui.QComboBox()
        field_combo.setMinimumSize(WIDGET_SIZE.map_dictfield_width, 0)
        field_combo.setEnabled(not word_checked and not ignore)
        self.fill_field_combo_options(field_combo, dict_name, dict_unique, dict_field)

        # ignore
        check_ignore = QtGui.QCheckBox(_("NOT_DICT_FIELD"))
        check_ignore.setEnabled(not word_checked)
        check_ignore.setChecked(ignore)

        # Skip valued
        check_skip = QtGui.QCheckBox(_("SKIP_VALUED"))
        check_skip.setEnabled(not word_checked and not ignore)
        check_skip.setChecked(skip)

        # events
        # word
        def radio_btn_checked():
            if self.___last_checkeds___:
                self.___last_checkeds___[0].setEnabled(True)
                ignore = self.___last_checkeds___[0].isChecked()
                for i in range(1, len(self.___last_checkeds___)):
                    self.___last_checkeds___[i].setEnabled(not ignore)

            word_checked = word_check_btn.isChecked()
            check_ignore.setEnabled(not word_checked)
            ignore = check_ignore.isChecked()
            dict_combo.setEnabled(not word_checked and not ignore)
            field_combo.setEnabled(not word_checked and not ignore)
            check_skip.setEnabled(not word_checked and not ignore)
            if word_checked:
                self.___last_checkeds___ = [
                    check_ignore, dict_combo, 
                    field_combo, check_skip
                ]
        word_check_btn.clicked.connect(radio_btn_checked)
        if word_checked: 
            self.___last_checkeds___ = None
            radio_btn_checked()
        # ignor
        def ignore_check_changed():
            ignore = not check_ignore.isChecked()
            dict_combo.setEnabled(ignore)
            field_combo.setEnabled(ignore)
            check_skip.setEnabled(ignore)
        check_ignore.clicked.connect(ignore_check_changed)
        # dict
        def dict_combo_changed(index):
            '''dict combo box index changed'''
            self.fill_field_combo_options(
                field_combo,
                dict_combo.currentText(),
                dict_combo.itemData(index),
                field_combo.currentText()
            )
        dict_combo.currentIndexChanged.connect(dict_combo_changed)

        self.dicts_layout.addWidget(word_check_btn, i + 1, 0)
        self.dicts_layout.addWidget(check_ignore, i + 1, 1)
        self.dicts_layout.addWidget(dict_combo, i + 1, 2)
        self.dicts_layout.addWidget(field_combo, i + 1, 3)
        self.dicts_layout.addWidget(check_skip, i + 1, 4)

        self.___options___.append([
            word_check_btn, 
            dict_combo, 
            field_combo, 
            check_ignore, 
            check_skip
        ])

    def save(self):
        if not self.current_model:
            return
        data = dict()
        maps = [
            {
                "word_checked": x[0].isChecked(),
                "dict": x[1].currentText().strip(),
                "dict_unique": x[1].itemData(x[1].currentIndex()) if x[1].itemData(x[1].currentIndex()) else '',
                "dict_field": x[2].currentText().strip(),
                "fld_ord": get_ord_from_fldname(self.current_model, x[0].text()),
                'ignore': x[3].isChecked(),
                'skip_valued': x[4].isChecked(),
            }
            for x in self.___options___
        ]
        current_model_id = str(self.current_model['id'])
        data[current_model_id] = maps
        data['last_model'] = self.current_model['id']
        config.update(data)


def check_updates():
    '''check add-on last version'''
    try:
        import libs.ankihub
        if not libs.ankihub.update([Endpoint.check_version], False, Endpoint.version):
            showInfo(_('LATEST_VERSION'))
    except:
        showInfo(_('CHECK_FAILURE'))
        pass


def show_options(browser = None):
    '''open options window'''
    parent = mw if browser is None else browser
    config.read()
    opt_dialog = OptionsDialog(parent, browser, u'Options')
    opt_dialog.activateWindow()
    opt_dialog.raise_()
    opt_dialog.exec_()


def show_fm_dialog(browser = None):
    '''open dictionary folder manager window'''
    parent = mw if browser is None else browser
    fm_dialog = FoldersManageDialog(parent, u'Dictionary Folder Manager')
    fm_dialog.activateWindow()
    fm_dialog.raise_()
    if fm_dialog.exec_() == QtGui.QDialog.Accepted:
        dict_paths = fm_dialog.dict_paths
        fm_dialog.save()
        # update local services
        service_manager.update_services()
    # reshow options window
    show_options(browser)