# Copyright 2020 Lorenzo Battistini @ TAKOBI
# Copyright 2020 Tecnativa - Alexandre D. Díaz
# License LGPL-3.0 or later (https://www.gnu.org/licenses/lgpl).
import json
from odoo.http import request, Controller, route


class PWA(Controller):

    def _get_pwa_scripts(self):
        """ Scripts to be imported in the service worker (Order is important) """
        return [
            '/web/static/lib/underscore/underscore.js',
            '/web_pwa_oca/static/src/js/worker/libs/class.js',
            '/web_pwa_oca/static/src/js/worker/base/tools.js',
            '/web_pwa_oca/static/src/js/worker/base/cache_manager.js',
            '/web_pwa_oca/static/src/js/worker/pwa.js',
        ]

    def _get_asset_urls(self, asset_xml_id):
        """Get all url's that have 'asset_xml_id'"""
        qweb_sudo = request.env['ir.qweb'].sudo()
        assets = qweb_sudo._get_asset_nodes(asset_xml_id, {}, True, True)
        urls = []
        for asset in assets:
            if asset[0] == 'link':
                urls.append(asset[1]['href'])
            if asset[0] == 'script':
                urls.append(asset[1]['src'])
        return urls

    def _get_pwa_params(self):
        """Get javascript PWA class initialzation params"""
        urls = []
        urls.extend(self._get_asset_urls("web.assets_common"))
        urls.extend(self._get_asset_urls("web.assets_backend"))
        version_list = []
        for url in urls:
            version_list.append(url.split('/')[3])
        cache_version = '-'.join(version_list)
        return [
            cache_version,
            urls
        ]

    @route('/service-worker.js', type='http', auth="public")
    def render_service_worker(self):
        """Route to register the service worker in the 'main' scope ('/')"""
        return request.render('web_pwa_oca.service_worker', {
            'pwa_scripts': self._get_pwa_scripts(),
            'pwa_params': self._get_pwa_params(),
        }, headers=[('Content-Type', 'text/javascript;charset=utf-8')])

    def _get_pwa_manifest(self):
        """Webapp manifest"""
        config_param_sudo = request.env['ir.config_parameter'].sudo()
        pwa_name = config_param_sudo.get_param("pwa.manifest.name", "Odoo PWA")
        pwa_short_name = config_param_sudo.get_param(
            "pwa.manifest.short_name", "Odoo PWA")
        icon128x128 = config_param_sudo.get_param(
            "pwa.manifest.icon128x128",
            "/web_pwa_oca/static/img/icons/icon-128x128.png")
        icon144x144 = config_param_sudo.get_param(
            "pwa.manifest.icon144x144",
            "/web_pwa_oca/static/img/icons/icon-144x144.png")
        icon152x152 = config_param_sudo.get_param(
            "pwa.manifest.icon152x152",
            "/web_pwa_oca/static/img/icons/icon-152x152.png")
        icon192x192 = config_param_sudo.get_param(
            "pwa.manifest.icon192x192",
            "/web_pwa_oca/static/img/icons/icon-192x192.png")
        icon256x256 = config_param_sudo.get_param(
            "pwa.manifest.icon256x256",
            "/web_pwa_oca/static/img/icons/icon-256x256.png")
        icon512x512 = config_param_sudo.get_param(
            "pwa.manifest.icon512x512",
            "/web_pwa_oca/static/img/icons/icon-512x512.png")
        background_color = config_param_sudo.get_param(
            "pwa.manifest.background_color", "#2E69B5")
        theme_color = config_param_sudo.get_param(
            "pwa.manifest.theme_color", "#2E69B5")
        return {
          "name": pwa_name,
          "short_name": pwa_short_name,
          "icons": [{
            "src": icon128x128,
              "sizes": "128x128",
              "type": "image/png"
            }, {
              "src": icon144x144,
              "sizes": "144x144",
              "type": "image/png"
            }, {
              "src": icon152x152,
              "sizes": "152x152",
              "type": "image/png"
            }, {
              "src": icon192x192,
              "sizes": "192x192",
              "type": "image/png"
            }, {
              "src": icon256x256,
              "sizes": "256x256",
              "type": "image/png"
            }, {
              "src": icon512x512,
              "sizes": "512x512",
              "type": "image/png"
            }],
          "start_url": "/web",
          "display": "standalone",
          "background_color": background_color,
          "theme_color": theme_color
        }

    @route('/web_pwa_oca/manifest.webmanifest', type='http', auth="public")
    def pwa_manifest(self):
        """Returns the manifest used to install the page as app"""
        return request.make_response(
            json.dumps(self._get_pwa_manifest()),
            headers=[('Content-Type', 'text/javascript;charset=utf-8')])