import json

import os
import shutil
from datetime import datetime

from logger import generalLogger
import options


jsonPath = 'data/data.json'


def startUp():
    filePath = jsonPath

    if not(os.path.exists('data')):
        os.mkdir('data')
    if not(os.path.exists('data/backup')):
        os.mkdir('data/backup')

    if os.path.exists(filePath):
        timestamp = datetime.now().strftime('%Y-%m-%d_%H-%M-%S')
        backupPath = (f'data/backup/data_backup_{timestamp}.json')
        shutil.copy(filePath, backupPath)
        generalLogger.info(f'JSON backup was created: {backupPath}')

    with open(filePath, 'w') as f:
        json.dump({}, f, ensure_ascii = False, indent=4)
        generalLogger.info(f'New {filePath} created with empty JSON.')


def parseParams(params):
    # Returnes dictionary of string params as paramsLines in options
    paramsList = params.split()
    paramsDict = {}
    if len(paramsList) != len(options.paramsLines):
        return -1

    for i in range(len(options.paramsLines)):
        paramsDict[options.paramsLines[i]] = paramsList[i]
    return paramsDict

def toDictPairParams(pair: str, params):
    # Returnes dictionary as pair:internal(params)
    paramsList = params.split()
    
    if len(paramsList) != len(options.paramsLines):
        return -1

    paramsDict = {pair: {}}
    for i in range(len(options.paramsLines)):
        paramsDict[pair][options.paramsLines[i]] = paramsList[i]
    return paramsDict


def checkPair(pair: str):
    # Returnes 1 if pair exists and 0 if not
    currentData = {}
    try:
        with open(jsonPath, 'r') as f:
            currentData = json.load(f)
    except json.decoder.JSONDecodeError as e:
        generalLogger.warning('JSON file is empty!')

    if pair in currentData:
        return 1
    else:
        return 0

def deletePair(pair: str):
    # Returnes 0 if deleted successfully and -1 if not
    currentData = {}
    try:
        with open(jsonPath, 'r') as f:
            currentData = json.load(f)
    except json.decoder.JSONDecodeError as e:
        generalLogger.warning('JSON file is empty!')

    if pair in currentData:
        del currentData[pair]
        with open(jsonPath, 'w', encoding = 'utf-8') as f:
            json.dump(currentData, f, ensure_ascii = False, indent = 4)
        generalLogger.info(f'Pair {pair} was deleted successfully!')
        return 0
    else:
        generalLogger.info(f'Pair {pair} was not found in the data file when trying to delete it.')
        return -1

def savePairParams(pair: str, params):
    # Saves or updates data in JSON
    newData = toDictPairParams(pair, params)

    if newData == -1:
        return -1

    currentData = {}
    try:
        with open(jsonPath, 'r') as f:
            currentData = json.load(f)
    except json.decoder.JSONDecodeError as e:
        generalLogger.warning('JSON file is empty!')

    if pair in currentData:
        generalLogger.info(f"Pair {pair} already exists.")
        return -2
    else:
        with open(jsonPath, 'w', encoding = 'utf-8') as f:
            currentData.update(newData)
            json.dump(currentData, f, ensure_ascii = False, indent = 4)
        generalLogger.info(f"Pair {pair} was added!")
    return 0


def loadJson():
    # Returnes the contents of the JSON file as a dictionary
    data = {}
    try:
        with open(jsonPath, 'r') as f:
            data = json.load(f)
    except json.decoder.JSONDecodeError as e:
        generalLogger.warning('JSON file is empty!')
    return data