from pathlib import Path
import pandas as pd
import os
os.chdir(Path(__file__).parent.resolve())
from utils import datenum_to_datetime, RegisteredImage, get_site_tide_data
import openpyxl
import scipy.io as sio
from PIL import Image, ImageDraw
from loguru import logger
import argparse


'''
SCRIPT LOGIC

For each site in Images Parent Directory:
    Iterate through years in reverse:
        Iterate through images names (dates) in reverse:
            Check if image name in 'Registered'? 
            If not, tag and save
            If yes, skip to the next site 
            
'''
#-----------------------------------------------------------------------------#
# Get command-line arguments 

parser = argparse.ArgumentParser()
parser.add_argument("--tag_deleted", action='store_true', required=False)
parser.add_argument("--overwrite", action='store_true', required=False)
parser.add_argument("--site", type=str, required=False)
args = parser.parse_args()

#-----------------------------------------------------------------------------#
# Retrieve coastsnap/images directory set in coastsnap_sites.csv

code_images_dir = str(Path(os.getcwd()).parent)
sites_csv_path = os.path.join(code_images_dir, "coastsnap_sites.csv")
coastsnap_sites_csv = pd.read_csv(sites_csv_path)
images_parent_dir = coastsnap_sites_csv.parent_directory[0] 
images_dir = os.path.join(images_parent_dir, "Images")

#-----------------------------------------------------------------------------#   
# Tag image function

def tag_image(image2tag):
    
    image = Image.open(image2tag.pathname)
    draw = ImageDraw.Draw(image)
    
    # White Text Box 
    if image2tag.large_filename:
        rect_height = image2tag.height/13
    else:
        rect_height = image2tag.height/20
         
    # Create white text box
    draw.rectangle((0, 0, image2tag.width, rect_height), fill='white')

    # Tag image with text
    draw.text((20, rect_height/4),image2tag.tag, font = image2tag.font, fill=(0, 0, 0)) 
    
    registered_path_wrong = image2tag.pathname[:-4] + '_registered.jpg' 
    registered_path = registered_path_wrong.replace('Photoshop', 'Registered')
    image = image.convert('RGB')

    image.save(registered_path)

#-----------------------------------------------------------------------------#
# Main function (called below)

def main(site):
    
    i=0
    site_complete = False # A flag to stop tagging images when found
    tide_data = False
    font = None
    image2tag = None 
    photoshop_path = images_dir +'/'+ site + '/Photoshop'
    try: # Check if site contains 'Processed' directory
        years_list = os.listdir(photoshop_path)
        years_list.reverse()
    except: # Site doesn't contain 'Processed'. Go to next site.
        return 
    
    # Loop through YEARS
    for year in years_list: 
        if site_complete: break 
        year_path = photoshop_path + '/' + year
        image_list = os.listdir(year_path)
        image_list.reverse()
        
        # Loop through IMAGES
        for image_filename in image_list: 
            registered_year_path = year_path.replace('Photoshop', 'Registered')
            registered_image_path = registered_year_path + '/' + image_filename[:-4] + '_registered.jpg' 
            if site not in image_filename: # Check the filename has the site in it
                continue
            
            # Case: Image already tagged
            if os.path.isfile(registered_image_path): 
                if args.tag_deleted: # If 'tag_deleted' = True, continue to next image
                    continue 
                elif args.overwrite: # If 'overwrite' = True, pass and tag image
                    pass
                else: # Otherwise, stop tagging and go to the next site
                    site_complete = True; 
                    if i == 0:
                        print(site + ": " + str(i) + " images tagged")
                    elif image2tag and image2tag.tide:
                        print(site + ": " + str(i) + " images tagged with tide")
                    else:
                        print(site + ": " + str(i) + " images tagged no tide")                  
                    return

            # Case: Image not tagged or 'overwrite' = True
            if not os.path.exists(registered_year_path): # Chech that registered/year directory exists
                os.makedirs(registered_year_path)     # if not, create it
            i += 1
            pathname = os.path.join(year_path, image_filename)
            image2tag = RegisteredImage(pathname, image_filename) # Create image object
            if i == 1: # Retrieve Tide Data once for each site
                tides_df = get_site_tide_data(images_parent_dir, site)
                
            font = image2tag.get_font()
            image2tag.get_dimensions()
            if isinstance(tides_df, pd.DataFrame): image2tag.get_tide(tides_df)
            image2tag.create_tag()
            
            tag_image(image2tag)
    
    # Case: All images tagged
    if not site_complete:
        if i == 0:
            print(site + ": " + str(i) + " images tagged")
        elif image2tag.tide:
            print(site + ": " + str(i) + " images tagged with tide")
        else:
            print(site + ": " + str(i) + " images tagged no tide")  

#-----------------------------------------------------------------------------#
# Calling the main function with the two cases

if args.site:           # Case 1: User specifies a site 
    main(args.site)
else:                   # Case 2: No site specified. Tag all images
    for site in os.listdir(images_dir): 
        main(site)