import json

import PIL.ExifTags
from PIL import Image, IptcImagePlugin, TiffImagePlugin


class Exif:

    def __init__(self, filename: str):
        self.filename = filename
        self.exif = {}
        try:
            self.img = Image.open(self.filename)
            self.img.verify() 
            self._readExif()
            self._readIptc()
        except:
            print("Error Couldn't open image: %s" % filename)


    def _readExif(self):
        img = self.img._getexif()
        for (key, value) in img.items():
            if key in PIL.ExifTags.TAGS:
                if isinstance(value, TiffImagePlugin.IFDRational):
                    value = float(value)
                elif isinstance(value, tuple):
                    value = tuple(float(t) if isinstance(t, TiffImagePlugin.IFDRational) else t for t in value)
                elif isinstance(value, bytes):
                    value = value.decode(errors="replace")
                self.exif[PIL.ExifTags.TAGS[key]] = value
        return self.exif

    def _readIptc(self):
        iptcTAGS = {
            (1, 90): 'CodedCharacterSet',
            (2, 0): 'RecordVersion',
            (2, 5): 'ObjectName',
            (2, 25): 'Keywords',
            (2, 55): 'DateCreated',
            (2, 60): 'TimeCreated',
            (2, 62): 'DigitizationDate',
            (2, 63): 'DigitizationTime',
            (2, 80): 'Byline',
            (2, 120): 'Caption',
        }
        img = IptcImagePlugin.getiptcinfo(self.img)
        for (key, value) in img.items():
            decoded = iptcTAGS.get(key, str(key))
            if isinstance(value, list):
                self.exif[decoded] = [x.decode('utf-8') for x in value]
            else:
                self.exif[decoded] = value.decode('utf-8')
        return self.exif

    def getValue(self, value):
        if self.exif[value]:
            return self.exif[value]

    def getJson(self):
        return json.dumps(self.exif)
    
    def __str__(self):
        return self.filename



xxx = Exif('./photo.jpg')

print(xxx.getJson())
print(xxx.getValue('Keywords'))
print(xxx.getValue('DateTimeOriginal'))
print(xxx)