"""
Test download
"""

import datetime
import re
from pathlib import Path
from urllib.parse import urljoin
from os import path, makedirs, getcwd

import attr
import pytz
import requests
#import typer
import pandas as pd
from loguru import logger
from timezonefinder import TimezoneFinder
from werkzeug.utils import secure_filename

code_images_dir = str(Path(getcwd()).parent)
coastsnap_sites_path = path.join(code_images_dir, "coastsnap_sites.csv")
coastsnap_sites = pd.read_csv(coastsnap_sites_path)

@attr.s()
class SpotteronImage:
    """
    Parses the dictionary from the Spotteron API into an object to make it easier to
    get the required parameters
    """

    raw_data = attr.ib()
    site_name = attr.ib()

    __img_url = "https://files.spotteron.com/images/spots/"

    def exists(self, folder):
        """
        Check if image has already been downloaded
        """
        folder = path.join(folder, str(self.dt.year))        
        output_filepath = Path(folder, self.output_filename)
                
        if output_filepath.is_file():
            return True
        else:
            return False

    def save(self, folder):
        
        # Concatenate year to parent dir
        # For example: "C:\Users\z5079346\OneDrive - UNSW\My files\CoastSnap\Images\alex\Processed" 
        # + "\2022" 
        folder = path.join(folder, str(self.dt.year))
        
        # Check if the folder already exists
        if not path.exists(folder):
            makedirs(folder)

        # Concatentate filename to parent dir
        # For example: "C:\Users\z5079346\OneDrive - UNSW\My files\CoastSnap\Images\alex\Processed\2022" 
        # + "\1641158046.Mon.Jan.03_07_14_06.AEST.2022.alex.snap.Raymond_b.jpg"
        output_filepath = Path(folder, self.output_filename)
        
        logger.info(f"Downloading {output_filepath}")
        response = requests.get(self.url, stream=True)
        if response.status_code == 200:
            with open(output_filepath, "wb") as f:
                f.write(response.content)

    @property
    def id(self):
        return self.raw_data["id"]

    @property
    def lat(self):
        return self.raw_data["attributes"]["latitude"]

    @property
    def lon(self):
        return self.raw_data["attributes"]["longitude"]

    @property
    def tz(self):
        """
        Finds timezone based on lon/lat
        """

        tf = TimezoneFinder()
        return tf.timezone_at(lng=self.lon, lat=self.lat)

    @property
    def dt(self):
        """
        Parses 'spotted at' attributes and returns a timezone aware python datetime
        """
        spotted_at = self.raw_data["attributes"]["spotted_at"]
        spotted_dt = datetime.datetime.strptime(spotted_at, "%Y-%m-%d %H:%M:%S")
        spotted_dt_tz = pytz.timezone(self.tz).localize(spotted_dt)
        return spotted_dt_tz

    @property
    def timestamp(self):
        return datetime.datetime.timestamp(self.dt)

    @property
    def url(self):
        """
        URL to download the image
        """
        img_name = f"{self.raw_data['attributes']['image']}.jpg"
        return urljoin(self.__img_url, img_name)

    @property
    def author(self):
        author = self.raw_data["attributes"]["spotted_by_name"]

        # Sanitize author and remove spaces
        author = secure_filename(author)
        author = re.sub(r"\s+", "", author)
        return author

    @property
    def output_filename(self):
        """
        Define the name of the image depending on its properties. Optional site_name
        can be included.
        """

        if self.site_name:
            return (
                f"{int(self.timestamp)}."
                f'{self.dt.strftime("%a.%b.%d_%H_%M_%S.")}{self.dt.tzname()}.{self.dt.strftime("%Y")}.'
                f"{self.site_name}.snap.{self.author}.jpg"
            )
        else:
            print("Please provide a site-name. Otherwise file names won't follow the reccomended naming convention")
            return (
                f"{int(self.timestamp)}."
                f'{self.dt.strftime("%a.%b.%d_%H_%M_%S.%z.%Y")}.{self.author}.jpg'
            )


@attr.s
class Spotteron:
    """
    Refer to https://www.spotteron.com/docs/api/v2?topic_id=37&key=LDazWbK5n62lbNA4hRNHtLa6hkyqz6Tr
    for API documentation
    """

    api_url = "https://www.spotteron.com/api/v2/spots"

    def save_images(self, root_id, output_folder, site_name, limit, overwrite):

        page = 1
        n_downloaded = 0
        while True:
            json_data = self.get_data(page=page, root_id=root_id)
            images = [
                SpotteronImage(raw_data=x, site_name=site_name)
                for x in json_data["data"]
            ]

            if not images:
                logger.info("No images returned. Check correct root_id is supplied")

            for img in images:

                if img.exists(output_folder) and overwrite == False:
                    logger.info("Existing images found. Stopping getting images")
                    break
                else:
                    img.save(output_folder) # THIS SHOULD BE THE PARENT DIR
                    n_downloaded += 1

                if n_downloaded >= limit:
                    logger.info(f"Downloaded limit of {limit} images. Stopping.")
                    break

            # Break out of the nested loop if we break on an image
            else:
                page += 1
                continue
            break

            pass

        logger.info("Download completed")

    @classmethod
    def get_data(self, page, root_id=None):
        """
        Gets the json data for a particular topic_id and root_id. Returns a dictionary
        containing data returned by api.
        """

        # Defined by Spotteron for coastsnap stations
        topic_id = 37

        payload = {
            "filter[topic_id]": topic_id,
            "limit": 5,
            "page": page,
        }

        if root_id:
            payload["filter[root_id]"] = root_id

        r = requests.get(self.api_url, params=payload)
        return r.json()


# @app.command()
# def from_spotteron(
#     root_id: int = typer.Argument(..., help="Spotteron id of Coastsnap station."),
#     output_folder: str = typer.Argument(..., help="Path to save images to."),
#     site_name: str = typer.Option(None, help="Add site to filename."),
#     limit: int = typer.Option(30, help="Max number of images to save."),
#     overwrite: bool = typer.Option(False, help="Overwrite downloaded images?"),
# ):
    """
    Downloads images from Spotteron API and saves to folder
    
    """
def from_spotteron(root_id, output_folder, site_name, limit, overwrite):
    spot = Spotteron()
    spot.save_images(root_id, output_folder, site_name, limit, overwrite)



# @app.command()
# def from_spotteron_batch(
#         overwrite: bool = typer.Option(False, help="Overwrite downloaded images?"),
#         ):
#     """
#     Downloads images from Spotteron API for all beaches specified in batch_download.csv 
#     """
    
#     #all_beaches = pd.read_csv(r"C:\Users\z5079346\OneDrive - UNSW\Code\coastsnap\coastsnap\spotteron_batch_download\batch_download.csv")
    
#     # Retrieve Parent Directory in batch_download.csv
#     parent_directory = coastsnap_sites.parent_directory[0] 
#     print(parent_directory)
    
#     for index, beach in coastsnap_sites.iterrows():
        
#         # Concatentate the parent directory, site name and 'Processed'
#         # to create the output site_path
#         site_name = beach.site_name
#         site_path = path.join(parent_directory, site_name, 'Processed')
        
#         # Download the images for a given site
#         logger.info(f"Downloading images for {beach.site_name}")
#         from_spotteron(beach.root_id, site_path, site_name, limit = beach.limit, overwrite = overwrite)

# if __name__ == "__main__":
#     app()
    
#overwrite: bool = typer.Option(False, help="Overwrite downloaded images?"),
#    ):
"""
Downloads images from Spotteron API for all beaches specified in batch_download.csv 
"""

#all_beaches = pd.read_csv(r"C:\Users\z5079346\OneDrive - UNSW\Code\coastsnap\coastsnap\spotteron_batch_download\batch_download.csv")

# Retrieve Parent Directory in batch_download.csv
CoastSnap_directory = coastsnap_sites.parent_directory[0] 
parent_directory = path.join(CoastSnap_directory, 'Images')

for index, beach in coastsnap_sites.iterrows():
    
    # Concatentate the parent directory, site name and 'Processed'
    # to create the output site_path
    site_name = beach.site_name
    site_path = path.join(parent_directory, site_name, 'Processed')
    
    # Download the images for a given site
    logger.info(f"Downloading images for {beach.site_name}")
    from_spotteron(beach.root_id, site_path, site_name, limit = beach.limit, overwrite = False)