# -*- coding: utf-8 -*-
#
import os, re
import yaml

regex = re.compile(r'^\$\{(?P<ENV>[A-Z_\-]+\:)?(?P<VAL>[\w\.]+)\}$')

class YamlConfig:
    def __init__(self, config):
        self.config = config

    def get(self, key:str):
        return YamlConfig(self.config.get(key))
    
    def getValueAsString(self, key: str):
        try:
            match = regex.match(self.config[key])
            group = match.groupdict()
            if group['ENV'] != None:
                env = group['ENV'][:-1]
                return os.getenv(env, group['VAL'])
            return None
        except:
            return self.config[key]
    
    def getValueAsInt(self, key: str):
        try:
            match = regex.match(self.config[key])
            group = match.groupdict()
            if group['ENV'] != None:
                env = group['ENV'][:-1]
                return int(os.getenv(env, group['VAL']))
            return 0
        except:
            return int(self.config[key])
        
    def getValueAsBool(self, key: str, env: str = None):
        try:
            match = regex.match(self.config[key])
            group = match.groupdict()
            if group['ENV'] != None:
                env = group['ENV'][:-1]
                return bool(os.getenv(env, group['VAL']))
            return False
        except:
            return bool(self.config[key])
    
def readYaml(path:str = 'application.yml', profile:str = None) -> YamlConfig:
    if os.path.exists(path):
        with open(path) as fd:
            conf = yaml.load(fd, Loader=yaml.FullLoader)

    if profile != None:
        result = path.split('.')
        profiledYaml = f'{result[0]}-{profile}.{result[1]}'
        if os.path.exists(profiledYaml):
            with open(profiledYaml) as fd:
                conf.update(yaml.load(fd, Loader=yaml.FullLoader))

    return YamlConfig(conf)

# res = readYaml()
# mysqlConf = res.get('mysql')
# print(mysqlConf)

# print(res.getValueAsString("host"))
# mysqlYaml = mysqlConf.getValueAsString("host")
# print(mysqlYaml)
# host = mysqlYaml.get("host").split(':')[-1][:-1]
# port = mysqlYaml.get("port").split(':')[-1][:-1]
# username = mysqlYaml.get("username").split(':')[-1][:-1]
# password = mysqlYaml.get("password").split(':')[-1][:-1]
# mysql_db = mysqlYaml.get("db").split(':')[-1][:-1]
# print(host,port,username,password)