"""
    Copyright 2023 Suchinton Chakravarty

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at 

        http://www.apache.org/licenses/LICENSE-2.0  
        
    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
"""

import extras.Kuksa_Instance as kuksa_instance
import os
import sys
import requests
import folium
from PyQt5 import uic, QtCore

from PyQt5.QtCore import QUrl, QObject
from PyQt5.QtCore import QThread, pyqtSignal, pyqtSlot
from PyQt5.QtWebEngineWidgets import QWebEngineView
from PyQt5.QtWidgets import QApplication, QListWidget, QLineEdit, QCompleter, QListView
from PyQt5.QtGui import QPainterPath, QRegion, QStandardItemModel, QStandardItem
from PyQt5.QtCore import QRectF
from PyQt5.QtCore import QTimer
from PyQt5.QtCore import Qt

current_dir = os.path.dirname(os.path.abspath(__file__))

# ========================================

sys.path.append(os.path.dirname(current_dir))


Form, Base = uic.loadUiType(os.path.join(current_dir, "../ui/Nav.ui"))

# ========================================


class Nav_Paths():
    def __init__(self):
        self.currLat = "Vehicle.CurrentLocation.Latitude"
        self.currLng = "Vehicle.CurrentLocation.Longitude"
        self.desLat = "Vehicle.Cabin.Infotainment.Navigation.DestinationSet.Latitude"
        self.desLng = "Vehicle.Cabin.Infotainment.Navigation.DestinationSet.Longitude"


class NavWidget(Base, Form):
    suggestionsUpdated = pyqtSignal(list)

    def __init__(self, parent=None):
        super(self.__class__, self).__init__(parent)
        self.setupUi(self)

        self.From_address = self.findChild(QLineEdit, "From_address")
        self.To_address = self.findChild(QLineEdit, "To_address")
        self.map_view = self.findChild(QWebEngineView, "map_view")

        path = QPainterPath()
        path.addRoundedRect(QRectF(self.map_view.rect()), 10, 10)
        mask = QRegion(path.toFillPolygon().toPolygon())
        self.map_view.setMask(mask)

        self.searching_thread = QThread()

        self.suggested_addresses = QStandardItemModel()
        completer = CustomCompleter(self.suggested_addresses)
        self.From_address.setCompleter(completer)

        self.From_address.textChanged.connect(self.delayed_search)
        # self.To_address.textChanged.connect(lambda: self.start_search(self.To_address.text()))

        self.suggestionsUpdated.connect(self.update_suggestions)

        self.timer = QTimer()
        self.timer.setInterval(500)  # Adjust delay as needed
        self.timer.setSingleShot(True)
        self.timer.timeout.connect(self.start_search)

    def delayed_search(self):
        self.timer.start()

    def start_search(self):
        query = self.From_address.text().strip()
        if query:
            self.searching_thread.run = lambda: self.search_address(query)
            self.searching_thread.start()

    def search_address(self, query):
        options = self.fetch_address_suggestions(query)
        self.suggestionsUpdated.emit(options)

    def fetch_address_suggestions(self, query):
        url = f"https://nominatim.openstreetmap.org/search?format=json&limit=5&q={requests.utils.quote(query)}"
        response = requests.get(url)
        if response.status_code == 200:
            return response.json()
        else:
            return []

    def show_suggestions(self, options):
        current_query = self.From_address.text().strip()
        if current_query:
            self.suggested_addresses.clear()
            for suggestion in options:
                address = suggestion.get("display_name", "")
                self.suggested_addresses.appendRow(QStandardItem(address))

    @pyqtSlot(list)
    def update_suggestions(self, options):
        self.show_suggestions(options)

    def select_suggestion(self, item):
        address = item.text()
        # self.address_input.setText(address)
        coordinates = self.show_location(address)

    def show_location(self, query):
        url = f"https://nominatim.openstreetmap.org/search?format=json&limit=1&q={requests.utils.quote(query)}"
        response = requests.get(url)
        if response.status_code == 200:
            data = response.json()
            if data:
                lat = data[0]["lat"]
                lon = data[0]["lon"]
                location = [float(lat), float(lon)]

                self.update_map(location)
                return location

    def update_map(self, location):
        map_html = self.create_map_html(location)
        file_path = os.path.abspath("map.html")
        with open(file_path, "w") as f:
            f.write(map_html)
        self.map_view.load(QUrl.fromLocalFile(file_path))

    def create_map_html(self, location):
        map = folium.Map(location=location, zoom_start=15)
        marker = folium.Marker(location=location)
        marker.add_to(map)
        return map._repr_html_()


class CustomCompleter(QCompleter):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.setPopup(QListView())
        self.popup().setStyleSheet("""
         QListView {
             background-color: #131313 ; /* black */
             color: #fff;
             border: 1px solid #4BD7D6 ; /* light blue */
             border-radius: 2px;
             padding: 10px;
             margin: 2px;
         }
        """)

        self.popup().setWindowFlags(Qt.Popup | Qt.FramelessWindowHint)
        self.popup().setUniformItemSizes(True)
        self.popup().setWordWrap(True)
        self.popup().setSpacing(1)
        self.popup().setFrameShape(QListView.NoFrame)
        self.popup().setFrameShadow(QListView.Plain)
        self.popup().setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)


if __name__ == '__main__':
    import sys
    app = QApplication(sys.argv)
    w = NavWidget()
    w.show()
    sys.exit(app.exec_())