# Part of Odoo. See LICENSE file for full copyright and licensing details.

import datetime
import logging
import os
import re
import tempfile

from lxml import html

import odoo
import odoo.modules.registry
from odoo import http
from odoo.http import content_disposition, dispatch_rpc, request, Response
from odoo.service import db
from odoo.tools.misc import file_open, str2bool
from odoo.tools.translate import _

from odoo.addons.base.models.ir_qweb import render as qweb_render


_logger = logging.getLogger(__name__)


DBNAME_PATTERN = '^[a-zA-Z0-9][a-zA-Z0-9_.-]+$'


class Database(http.Controller):

    def _render_template(self, **d):
        d.setdefault('manage', True)
        d['insecure'] = odoo.tools.config.verify_admin_password('admin')
        d['list_db'] = odoo.tools.config['list_db']
        d['langs'] = odoo.service.db.exp_list_lang()
        d['countries'] = odoo.service.db.exp_list_countries()
        d['pattern'] = DBNAME_PATTERN
        # databases list
        try:
            d['databases'] = http.db_list()
            d['incompatible_databases'] = odoo.service.db.list_db_incompatible(d['databases'])
        except odoo.exceptions.AccessDenied:
            d['databases'] = [request.db] if request.db else []

        templates = {}

        with file_open("web/static/src/public/database_manager.qweb.html", "r") as fd:
            templates['database_manager'] = fd.read()
        with file_open("web/static/src/public/database_manager.master_input.qweb.html", "r") as fd:
            templates['master_input'] = fd.read()
        with file_open("web/static/src/public/database_manager.create_form.qweb.html", "r") as fd:
            templates['create_form'] = fd.read()

        def load(template_name):
            fromstring = html.document_fromstring if template_name == 'database_manager' else html.fragment_fromstring
            return (fromstring(templates[template_name]), template_name)

        return qweb_render('database_manager', d, load)

    @http.route('/web/database/selector', type='http', auth="none")
    def selector(self, **kw):
        if request.db:
            request.env.cr.close()
        return self._render_template(manage=False)

    @http.route('/web/database/manager', type='http', auth="none")
    def manager(self, **kw):
        if request.db:
            request.env.cr.close()
        return self._render_template()

    @http.route('/web/database/create', type='http', auth="none", methods=['POST'], csrf=False)
    def create(self, master_pwd, name, lang, password, **post):
        insecure = odoo.tools.config.verify_admin_password('admin')
        if insecure and master_pwd:
            dispatch_rpc('db', 'change_admin_password', ["admin", master_pwd])
        try:
            if not re.match(DBNAME_PATTERN, name):
                raise Exception(_('Houston, we have a database naming issue! Make sure you only use letters, numbers, underscores, hyphens, or dots in the database name, and you\'ll be golden.'))
            # country code could be = "False" which is actually True in python
            country_code = post.get('country_code') or False
            dispatch_rpc('db', 'create_database', [master_pwd, name, bool(post.get('demo')), lang, password, post['login'], country_code, post['phone']])
            credential = {'login': post['login'], 'password': password, 'type': 'password'}
            request.session.authenticate(name, credential)
            request.session.db = name
            return request.redirect('/odoo')
        except Exception as e:
            _logger.exception("Database creation error.")
            error = "Database creation error: %s" % (str(e) or repr(e))
        return self._render_template(error=error)

    @http.route('/web/database/duplicate', type='http', auth="none", methods=['POST'], csrf=False)
    def duplicate(self, master_pwd, name, new_name, neutralize_database=False):
        insecure = odoo.tools.config.verify_admin_password('admin')
        if insecure and master_pwd:
            dispatch_rpc('db', 'change_admin_password', ["admin", master_pwd])
        try:
            if not re.match(DBNAME_PATTERN, new_name):
                raise Exception(_('Houston, we have a database naming issue! Make sure you only use letters, numbers, underscores, hyphens, or dots in the database name, and you\'ll be golden.'))
            dispatch_rpc('db', 'duplicate_database', [master_pwd, name, new_name, neutralize_database])
            if request.db == name:
                request.env.cr.close()  # duplicating a database leads to an unusable cursor
            return request.redirect('/web/database/manager')
        except Exception as e:
            _logger.exception("Database duplication error.")
            error = "Database duplication error: %s" % (str(e) or repr(e))
            return self._render_template(error=error)

    @http.route('/web/database/drop', type='http', auth="none", methods=['POST'], csrf=False)
    def drop(self, master_pwd, name):
        insecure = odoo.tools.config.verify_admin_password('admin')
        if insecure and master_pwd:
            dispatch_rpc('db', 'change_admin_password', ["admin", master_pwd])
        try:
            dispatch_rpc('db', 'drop', [master_pwd, name])
            if request.session.db == name:
                request.session.logout()
            return request.redirect('/web/database/manager')
        except Exception as e:
            _logger.exception("Database deletion error.")
            error = "Database deletion error: %s" % (str(e) or repr(e))
            return self._render_template(error=error)

    @http.route('/web/database/backup', type='http', auth="none", methods=['POST'], csrf=False)
    def backup(self, master_pwd, name, backup_format='zip'):
        insecure = odoo.tools.config.verify_admin_password('admin')
        if insecure and master_pwd:
            dispatch_rpc('db', 'change_admin_password', ["admin", master_pwd])
        try:
            odoo.service.db.check_super(master_pwd)
            if name not in http.db_list():
                raise Exception("Database %r is not known" % name)
            ts = datetime.datetime.utcnow().strftime("%Y-%m-%d_%H-%M-%S")
            filename = "%s_%s.%s" % (name, ts, backup_format)
            headers = [
                ('Content-Type', 'application/octet-stream; charset=binary'),
                ('Content-Disposition', content_disposition(filename)),
            ]
            dump_stream = odoo.service.db.dump_db(name, None, backup_format)
            response = Response(dump_stream, headers=headers, direct_passthrough=True)
            return response
        except Exception as e:
            _logger.exception('Database.backup')
            error = "Database backup error: %s" % (str(e) or repr(e))
            return self._render_template(error=error)

    @http.route('/web/database/restore', type='http', auth="none", methods=['POST'], csrf=False, max_content_length=None)
    def restore(self, master_pwd, backup_file, name, copy=False, neutralize_database=False):
        insecure = odoo.tools.config.verify_admin_password('admin')
        if insecure and master_pwd:
            dispatch_rpc('db', 'change_admin_password', ["admin", master_pwd])
        try:
            data_file = None
            db.check_super(master_pwd)
            with tempfile.NamedTemporaryFile(delete=False) as data_file:
                backup_file.save(data_file)
            db.restore_db(name, data_file.name, str2bool(copy), neutralize_database)
            return request.redirect('/web/database/manager')
        except Exception as e:
            error = "Database restore error: %s" % (str(e) or repr(e))
            return self._render_template(error=error)
        finally:
            if data_file:
                os.unlink(data_file.name)

    @http.route('/web/database/change_password', type='http', auth="none", methods=['POST'], csrf=False)
    def change_password(self, master_pwd, master_pwd_new):
        try:
            dispatch_rpc('db', 'change_admin_password', [master_pwd, master_pwd_new])
            return request.redirect('/web/database/manager')
        except Exception as e:
            error = "Master password update error: %s" % (str(e) or repr(e))
            return self._render_template(error=error)

    @http.route('/web/database/list', type='json', auth='none')
    def list(self):
        """
        Used by Mobile application for listing database
        :return: List of databases
        :rtype: list
        """
        return http.db_list()