from flask import request, jsonify
from jellyfin_accounts.jf_api import Jellyfin
import json
import datetime
import secrets
import time
from jellyfin_accounts import config, config_path, app, g, data_store
from jellyfin_accounts import web_log as log
from jellyfin_accounts.validate_password import PasswordValidator

def resp(success=True, code=500):
    if success:
        r = jsonify({'success': True})
        if code == 500:
            r.status_code = 200
        else:
            r.status_code = code
    else:
        r = jsonify({'success': False})
        r.status_code = code
    return r

def checkInvite(code, delete=False):
    current_time = datetime.datetime.now()
    invites = dict(data_store.invites)
    match = False
    for invite in invites:
        expiry = datetime.datetime.strptime(invites[invite]['valid_till'],
                                            '%Y-%m-%dT%H:%M:%S.%f')
        if current_time >= expiry:
            log.debug(f'Housekeeping: Deleting old invite {invite}')
            del data_store.invites[invite]
        elif invite == code:
            match = True
            if delete:
                del data_store.invites[code]
    return match

jf = Jellyfin(config['jellyfin']['server'],
              config['jellyfin']['client'],
              config['jellyfin']['version'],
              config['jellyfin']['device'],
              config['jellyfin']['device_id'])

from jellyfin_accounts.login import auth

jf_address = config['jellyfin']['server']
success = False
for i in range(3):
    try:
        jf.authenticate(config['jellyfin']['username'],
                        config['jellyfin']['password'])
        success = True
        log.info(f'Successfully authenticated with {jf_address}')
        break
    except Jellyfin.AuthenticationError:
        log.error(f'Failed to authenticate with {jf_address}, Retrying...')
        time.sleep(5)

if not success:
    log.error('Could not authenticate after 3 tries.')
    exit()

def switchToIds():
    try:
        with open(config['files']['emails'], 'r') as f:
            emails = json.load(f)
    except (FileNotFoundError, json.decoder.JSONDecodeError):
        emails = {}
    users = jf.getUsers(public=False)
    new_emails = {}
    match = False
    for key in emails:
        for user in users:
            if user['Name'] == key:
                match = True
                new_emails[user['Id']] = emails[key]
            elif user['Id'] == key:
                new_emails[user['Id']] = emails[key]
    if match:
        from pathlib import Path
        email_file = Path(config['files']['emails']).name
        log.info((f'{email_file} modified to use userID instead of ' +
                  'usernames. These will be used in future.'))
        emails = new_emails
        with open(config['files']['emails'], 'w') as f:
            f.write(json.dumps(emails, indent=4))


# Temporary, switches emails.json over from using Usernames to User IDs.
switchToIds()

if config.getboolean('password_validation', 'enabled'):
    validator = PasswordValidator(config['password_validation']['min_length'],
                                  config['password_validation']['upper'],
                                  config['password_validation']['lower'],
                                  config['password_validation']['number'],
                                  config['password_validation']['special'])
else:
    validator = PasswordValidator(0, 0, 0, 0, 0)


@app.route('/newUser', methods=['POST'])
def newUser():
    data = request.get_json()
    log.debug('Attempted newUser')
    if checkInvite(data['code']):
        validation = validator.validate(data['password'])
        valid = True
        for criterion in validation:
            if validation[criterion] is False:
                valid = False
        if valid:
            log.debug('User password valid')
            try:
                user = jf.newUser(data['username'],
                                  data['password'])
            except Jellyfin.UserExistsError:
                error = f'User already exists named {data["username"]}'
                log.debug(error)
                return jsonify({'error': error})
            except:
                return jsonify({'error': 'Unknown error'})
            checkInvite(data['code'], delete=True)
            if user.status_code == 200:
                try:
                    policy = data_store.user_template
                    if policy != {}:
                        jf.setPolicy(user.json()['Id'], policy)
                    else:
                        log.debug('user policy was blank')
                except:
                    log.error('Failed to set new user policy')
                try:
                    configuration = data_store.user_configuration
                    displayprefs = data_store.user_displayprefs
                    if configuration != {} and displayprefs != {}:
                        if jf.setConfiguration(user.json()['Id'],
                                               configuration):
                            jf.setDisplayPreferences(user.json()['Id'],
                                                     displayprefs)
                            log.debug('Set homescreen layout.')
                    else:
                        log.debug('user configuration and/or ' +
                                  'displayprefs were blank')
                except:
                    log.error('Failed to set new user homescreen layout')
                if config.getboolean('password_resets', 'enabled'):
                    data_store.emails[user.json()['Id']] = data['email']
                    log.debug('Email address stored')
                log.info('New user created')
            else:
                log.error(f'New user creation failed: {user.status_code}')
                return resp(False)
        else:
            log.debug('User password invalid')
        return jsonify(validation)
    else:
        log.debug('Attempted newUser unauthorized')
        return resp(False, code=401)


@app.route('/generateInvite', methods=['POST'])
@auth.login_required
def generateInvite():
    current_time = datetime.datetime.now()
    data = request.get_json()
    delta = datetime.timedelta(hours=int(data['hours']),
                               minutes=int(data['minutes']))
    invite_code = secrets.token_urlsafe(16)
    invite = {}
    log.debug(f'Creating new invite: {invite_code}')
    valid_till = current_time + delta
    invite['valid_till'] = valid_till.strftime('%Y-%m-%dT%H:%M:%S.%f')
    if 'email' in data and config.getboolean('invite_emails', 'enabled'):
        address = data['email']
        invite['email'] = address
        log.info(f'Sending invite to {address}')
        method = config['email']['method']
        if method == 'mailgun':
            from jellyfin_accounts.email import Mailgun
            email = Mailgun(address)
        elif method == 'smtp':
            from jellyfin_accounts.email import Smtp
            email = Smtp(address)
        email.construct_invite({'expiry': valid_till,
                                'code': invite_code})
        response = email.send()
        if response is False or type(response) != bool:
            invite['email'] = f'Failed to send to {address}'
    data_store.invites[invite_code] = invite
    log.info(f'New invite created: {invite_code}')
    return resp()


@app.route('/getInvites', methods=['GET'])
@auth.login_required
def getInvites():
    log.debug('Invites requested')
    current_time = datetime.datetime.now()
    invites = dict(data_store.invites)
    for code in invites:
        checkInvite(code)
    invites = dict(data_store.invites)
    response = {'invites': []}
    for code in invites:
        expiry = datetime.datetime.strptime(invites[code]['valid_till'],
                                            '%Y-%m-%dT%H:%M:%S.%f')
        valid_for = expiry - current_time
        invite = {'code': code,
                  'hours': valid_for.seconds//3600,
                  'minutes': (valid_for.seconds//60) % 60}
        if 'email' in invites[code]:
            invite['email'] = invites[code]['email']
        response['invites'].append(invite)
    return jsonify(response)

@app.route('/deleteInvite', methods=['POST'])
@auth.login_required
def deleteInvite():
    code = request.get_json()['code']
    invites = dict(data_store.invites)
    if code in invites:
        del data_store.invites[code]
    log.info(f'Invite deleted: {code}')
    return resp()


@app.route('/getToken')
@auth.login_required
def get_token():
    token = g.user.generate_token()
    return jsonify({'token': token.decode('ascii')})


@app.route('/getUsers', methods=['GET'])
@auth.login_required
def getUsers():
    log.debug('User and email list requested')
    response = {'users': []}
    users = jf.getUsers(public=False)
    emails = data_store.emails
    for user in users:
        entry = {'name': user['Name']}
        if user['Id'] in emails:
            entry['email'] = emails[user['Id']]
        response['users'].append(entry)
    return jsonify(response)


@app.route('/modifyUsers', methods=['POST'])
@auth.login_required
def modifyUsers():
    data = request.get_json()
    log.debug('Email list modification requested')
    for key in data:
        uid = jf.getUsers(key, public=False)['Id']
        data_store.emails[uid] = data[key]
        log.debug(f'Email for user "{key}" modified')
    return resp()


@app.route('/setDefaults', methods=['POST'])
@auth.login_required
def setDefaults():
    data = request.get_json()
    username = data['username']
    log.debug(f'Storing default settings from user {username}')
    try:
        user = jf.getUsers(username=username,
                           public=False)
    except Jellyfin.UserNotFoundError:
        log.error(f'Storing defaults failed: Couldn\'t find user {username}')
        return resp(False)
    uid = user['Id']
    policy = user['Policy']
    data_store.user_template = policy
    if data['homescreen']:
        configuration = user['Configuration']
        try:
            displayprefs = jf.getDisplayPreferences(uid)
            data_store.user_configuration = configuration
            data_store.user_displayprefs = displayprefs
        except:
            log.error('Storing defaults failed: ' +
                      'couldn\'t store homescreen layout')
            return resp(False)
    return resp()
    
import jellyfin_accounts.setup