import os
import time
import json
import base64
import traceback
from _log import logger, EventType
import tools
import shutil
import cv2


def is_image(path: str):
    img = cv2.imread(path)
    if img is None:
        return False
    return True


class Interface:
    def __init__(self, interface=None):
        if interface is None:
            interface = os.getenv('PARAMS')
        if interface is None:
            interface = {

            }

        self.interface = self.decode_b64(interface)
        self.op_type = self.get_op_type()
        self.args = self.interface['args']

        self.input = self.interface.get('input', '/input')
        if not os.path.exists(self.input):
            raise FileNotFoundError('The input file does not exist.')

        self.result = self.interface.get('result', '/result')
        if self.result is None:
            raise FileNotFoundError('Need to give the result path.')

        self.input_dic = []

        self.IOU = self.args.get('IOU', 0.9)
        self.template = self.args['template']
        self.content = self.args.get('content')
        self.precision = self.args.get('precision', 0.9)
        self.time = self.args.get('time', 1)
        self.divisor = self.args.get('divisor', [])  # {'coordinates': 0.4, 'properties': 0.3, 'imageResult': 0.3}
        self.distance = self.args.get('distance')

    @staticmethod
    def decode_b64(interface):
        interface = base64.b64decode(interface.encode('utf-8')).decode("utf-8")
        interface = json.loads(interface)

        assert isinstance(interface, dict), 'The interface must be a dictionary.'

        return interface

    @staticmethod
    def encode_b64(string):
        return base64.b64encode(string.encode('utf-8')).decode("utf-8")

    def get_op_type(self):
        op_type = self.interface.get('type', 'matting')

        op_type = op_type.upper()
        if op_type not in ['MATTING', 'RESIZE']:
            raise TypeError('The type must be matting or resize')

        return op_type

    def scan_files(self, path: str):
        if os.path.isdir(path):
            self.scan_files(path)
        else:
            self.input_dic.append(path)

    def run(self):
        logger.info("files scanning.", extra={'event_type': EventType.STEP_COMPLETE})
        self.scan_files(self.input)
        files_in_total = len(self.input_dic)
        logger.info("files-in-total",
                    extra={'event_type': EventType.METRICS, 'desc': '处理文件总个数', 'value': files_in_total})
        count = 0
        for path in self.input_dic:
            count += 1
            logger.info("PROGRESS", extra={'event_type': EventType.PROGRESS, 'total': files_in_total, 'current': count})
            try:
                real_path = os.path.relpath(path, self.input)
                shutil.copy(path, os.path.join(self.result, real_path))
                if is_image(path):
                    output = os.path.dirname(path)
                    output = os.path.join(self.result, os.path.relpath(output, self.input))
                    tools.seg(path, output)

            except Exception as e:
                logger.info(e, extra={'event_type': EventType.TASK_CRASHED, 'traceback': traceback.format_exc()})


def start(interface=None):
    logger.info('TASK_STARTED', extra={'event_type': EventType.TASK_STARTED})
    t = time.time()
    try:
        Interface(interface=interface).run()
    except Exception as e:
        logger.info(e, extra={'event_type': EventType.TASK_CRASHED, 'traceback': traceback.format_exc()})
    logger.info("TASK_FINISHED", extra={'event_type': EventType.TASK_FINISHED})
    logger.info("TASK_FINISHED")
    elapsed = time.time() - t
    logger.info("time-elapsed", extra={'event_type': EventType.METRICS, 'desc': '总时长', 'value': elapsed})


if __name__ == '__main__':
    start()