import json
from enum import Enum

def init_project():
    # validate_values()
    version = Version('package.json')
    version.parse()
    version.increment(ReleaseLevel.MAJOR)
    version.write()
    print(version.get())

def prepare_release():
    pass

def release_in_git():
    pass

class ReleaseLevel(Enum):
    MAJOR = 0
    MINOR = 1
    PATCH = 2
    SNAPSHOT = 3

class Version():

    def __init__(self, config_file_path):
        self.version = []
        self.is_snapshot = False
        self.config_file_path = config_file_path
        self.config_file_type = config_file_path.split('.')[-1]

    def parse(self):
        match self.config_file_type:
            case 'json':
                self.__parse_json()

    def __parse_json(self):
        with open(self.config_file_path, 'r') as json_file:
            json_version = json.load(json_file)['version']
            if '-SNAPSHOT' in json_version:
                self.is_snapshot = True
                json_version = json_version.replace('-SNAPSHOT', '')
            self.version = [int(x) for x in json_version.split('.')]

    def increment(self, level: ReleaseLevel):
        self.is_snapshot = False
        match level:
            case ReleaseLevel.SNAPSHOT:
                self.is_snapshot = True
            case ReleaseLevel.PATCH:
                self.version[ReleaseLevel.PATCH.value] += 1
            case ReleaseLevel.MINOR:
                self.version[ReleaseLevel.PATCH.value] =  0
                self.version[ReleaseLevel.MINOR.value] += 1
            case ReleaseLevel.MAJOR:
                self.version[ReleaseLevel.PATCH.value] =  0
                self.version[ReleaseLevel.MINOR.value] =  0
                self.version[ReleaseLevel.MAJOR.value] += 1

    def write(self):
        match self.config_file_type:
            case 'json':
                self.__write_json()

    def __write_json(self):
        with open(self.config_file_path, 'r+') as json_file:
            json_data = json.load(json_file)
            json_data['version'] = self.get()
            json_file.seek(0)            
            json.dump(json_data, json_file, indent=4)
            json_file.truncate()

    def get(self) -> str:
        version_string = ".".join([str(x) for x in self.version])
        if self.is_snapshot:
            version_string += "-SNAPSHOT"
        return version_string