# -*- coding: utf-8 -*-
# Part of Odoo. See LICENSE file for full copyright and licensing details.

from collections import Counter
import datetime
import errno
from os import utime
import time

from odoo import api
from odoo.addons.base.ir.ir_qweb import AssetsBundle
from odoo.modules.module import get_resource_path
from odoo.tests import HttpCase
from odoo.tests.common import TransactionCase


def _touch(filepath, asset, t=None):
    try:
        utime(filepath, (t, t) if t else None)
    except OSError as e:
        if e.errno in [errno.EPERM, errno.EACCES, errno.EROFS]:
            # Permission denied when touching the asset file, possibly read-only filesystem.
            # We alter the asset last modified time to simulate a change in the file
            now = datetime.datetime.now()
            asset.last_modified = now
            for sheet in asset.stylesheets:
                sheet.last_modified = now
        else:
            raise


class TestJavascriptAssetsBundle(TransactionCase):
    def setUp(self):
        super(TestJavascriptAssetsBundle, self).setUp()
        self.jsbundle_xmlid = 'test_assetsbundle.bundle1'
        self.cssbundle_xmlid = 'test_assetsbundle.bundle2'

    def _get_asset(self, xmlid, env=None):
        env = (env or self.env)
        files, remains = env['ir.qweb']._get_asset_content(xmlid, env.context)
        return AssetsBundle(xmlid, files, remains, env=env)

    def _any_ira_for_bundle(self, type):
        """ Returns all ir.attachments associated to a bundle, regardless of the verion.
        """
        bundle = self.jsbundle_xmlid if type == 'js' else self.cssbundle_xmlid
        return self.env['ir.attachment'].search([
            ('url', '=like', '/web/content/%-%/{0}%.{1}'.format(bundle, type))
        ])

    def test_01_generation(self):
        """ Checks that a bundle creates an ir.attachment record when its `js` method is called
        for the first time.
        """
        self.bundle = self._get_asset(self.jsbundle_xmlid, env=self.env)

        # there shouldn't be any attachment associated to this bundle
        self.assertEquals(len(self._any_ira_for_bundle('js')), 0)
        self.assertEquals(len(self.bundle.get_attachments('js')), 0)

        # trigger the first generation and, thus, the first save in database
        self.bundle.js()

        # there should be one attachment associated to this bundle
        self.assertEquals(len(self._any_ira_for_bundle('js')), 1)
        self.assertEquals(len(self.bundle.get_attachments('js')), 1)

    def test_02_access(self):
        """ Checks that the bundle's cache is working, i.e. that the bundle creates only one
        ir.attachment record when rendered multiple times.
        """
        bundle0 = self._get_asset(self.jsbundle_xmlid)
        bundle0.js()

        self.assertEquals(len(self._any_ira_for_bundle('js')), 1)

        version0 = bundle0.version
        ira0 = self._any_ira_for_bundle('js')
        date0 = ira0.create_date

        bundle1 = self._get_asset(self.jsbundle_xmlid)
        bundle1.js()

        self.assertEquals(len(self._any_ira_for_bundle('js')), 1)

        version1 = bundle1.version
        ira1 = self._any_ira_for_bundle('js')
        date1 = ira1.create_date

        self.assertEquals(version0, version1)
        self.assertEquals(date0, date1)

    def test_03_date_invalidation(self):
        """ Checks that a bundle is invalidated when one of its assets' modification date is changed.
        """
        bundle0 = self._get_asset(self.jsbundle_xmlid)
        bundle0.js()
        last_modified0 = bundle0.last_modified
        version0 = bundle0.version

        path = get_resource_path('test_assetsbundle', 'static', 'src', 'js', 'test_jsfile1.js')
        bundle1 = self._get_asset(self.jsbundle_xmlid)
        _touch(path, bundle1)

        bundle1.js()
        last_modified1 = bundle1.last_modified
        version1 = bundle1.version
        self.assertNotEquals(last_modified0, last_modified1)
        self.assertNotEquals(version0, version1)

        # check if the previous attachment is correctly cleaned
        self.assertEquals(len(self._any_ira_for_bundle('js')), 1)

    def test_04_content_invalidation(self):
        """ Checks that a bundle is invalidated when its content is modified by adding a file to
        source.
        """
        bundle0 = self._get_asset(self.jsbundle_xmlid)
        bundle0.js()
        files0 = bundle0.files
        remains0 = bundle0.remains
        version0 = bundle0.version

        self.assertEquals(len(self._any_ira_for_bundle('js')), 1)

        view_arch = """
        <data>
            <xpath expr="." position="inside">
                <script type="text/javascript" src="/test_assetsbundle/static/src/js/test_jsfile4.js"/>
            </xpath>
        </data>
        """
        bundle = self.browse_ref(self.jsbundle_xmlid)
        view = self.env['ir.ui.view'].create({
            'name': 'test bundle inheritance',
            'type': 'qweb',
            'arch': view_arch,
            'inherit_id': bundle.id,
        })

        bundle1 = self._get_asset(self.jsbundle_xmlid, env=self.env(context={'check_view_ids': view.ids}))
        bundle1.js()
        files1 = bundle1.files
        remains1 = bundle1.remains
        version1 = bundle1.version

        self.assertNotEquals(files0, files1)
        self.assertEquals(remains0, remains1)
        self.assertNotEquals(version0, version1)

        # check if the previous attachment are correctly cleaned
        self.assertEquals(len(self._any_ira_for_bundle('js')), 1)

    def test_05_debug(self):
        """ Checks that a bundle rendered in debug mode outputs non-minified assets.
        """
        debug_bundle = self._get_asset(self.jsbundle_xmlid)
        content = debug_bundle.to_html(debug='assets')
        # find back one of the original asset file
        self.assertIn('/test_assetsbundle/static/src/js/test_jsfile1.js', content)

        # there shouldn't be any assets created in debug mode
        self.assertEquals(len(self._any_ira_for_bundle('js')), 0)

    def test_06_paginated_css_generation1(self):
        """ Checks that a bundle creates enough ir.attachment records when its `css` method is called
        for the first time while the number of css rules exceed the limit.
        """
        # note: changing the max_css_rules of a bundle does not invalidate its attachments
        # self.cssbundle_xlmid contains 3 rules
        self.bundle = self._get_asset(self.cssbundle_xmlid, env=self.env(context={'max_css_rules': 1}))
        self.bundle.css()
        self.assertEquals(len(self._any_ira_for_bundle('css')), 3)
        self.assertEquals(len(self.bundle.get_attachments('css')), 3)

    def test_07_paginated_css_generation2(self):
        # self.cssbundle_xlmid contains 3 rules
        self.bundle = self._get_asset(self.cssbundle_xmlid, env=self.env(context={'max_css_rules': 2}))
        self.bundle.css()
        self.assertEquals(len(self._any_ira_for_bundle('css')), 2)
        self.assertEquals(len(self.bundle.get_attachments('css')), 2)

    def test_08_paginated_css_generation3(self):
        # self.cssbundle_xlmid contains 3 rules
        self.bundle = self._get_asset(self.cssbundle_xmlid, env=self.env(context={'max_css_rules': 3}))
        self.bundle.css()
        self.assertEquals(len(self._any_ira_for_bundle('css')), 1)
        self.assertEquals(len(self.bundle.get_attachments('css')), 1)

    def test_09_paginated_css_access(self):
        """ Checks that the bundle's cache is working, i.e. that a bundle creates only enough
        ir.attachment records when rendered multiple times.
        """
        bundle0 = self._get_asset(self.cssbundle_xmlid, env=self.env(context={'max_css_rules': 1}))
        bundle0.css()

        self.assertEquals(len(self._any_ira_for_bundle('css')), 3)

        version0 = bundle0.version
        ira0, ira1, ira2 = self._any_ira_for_bundle('css')
        date0 = ira0.create_date
        date1 = ira1.create_date
        date2 = ira2.create_date

        bundle1 = self._get_asset(self.cssbundle_xmlid, env=self.env(context={'max_css_rules': 1}))
        bundle1.css()

        self.assertEquals(len(self._any_ira_for_bundle('css')), 3)

        version1 = bundle1.version
        ira3, ira4, ira5 = self._any_ira_for_bundle('css')
        date3 = ira1.create_date
        date4 = ira1.create_date
        date5 = ira1.create_date

        self.assertEquals(version0, version1)
        self.assertEquals(date0, date3)
        self.assertEquals(date1, date4)
        self.assertEquals(date2, date5)

    def test_10_paginated_css_date_invalidation(self):
        """ Checks that a bundle is invalidated when one of its assets' modification date is changed.
        """
        bundle0 = self._get_asset(self.cssbundle_xmlid, env=self.env(context={'max_css_rules': 1}))
        bundle0.css()
        last_modified0 = bundle0.last_modified
        version0 = bundle0.version

        path = get_resource_path('test_assetsbundle', 'static', 'src', 'css', 'test_cssfile1.css')
        bundle1 = self._get_asset(self.cssbundle_xmlid, env=self.env(context={'max_css_rules': 1}))
        _touch(path, bundle1)

        bundle1.css()
        last_modified1 = bundle1.last_modified
        version1 = bundle1.version

        self.assertNotEquals(last_modified0, last_modified1)
        self.assertNotEquals(version0, version1)

        # check if the previous attachment is correctly cleaned
        self.assertEquals(len(self._any_ira_for_bundle('css')), 3)

    def test_11_paginated_css_content_invalidation(self):
        """ Checks that a bundle is invalidated when its content is modified by adding a file to
        source.
        """
        bundle0 = self._get_asset(self.cssbundle_xmlid, env=self.env(context={'max_css_rules': 1}))
        bundle0.css()
        files0 = bundle0.files
        remains0 = bundle0.remains
        version0 = bundle0.version

        self.assertEquals(len(self._any_ira_for_bundle('css')), 3)

        view_arch = """
        <data>
            <xpath expr="." position="inside">
                <link rel="stylesheet" href="/test_assetsbundle/static/src/css/test_cssfile2.css"/>
            </xpath>
        </data>
        """
        bundle = self.browse_ref(self.cssbundle_xmlid)
        view = self.env['ir.ui.view'].create({
            'name': 'test bundle inheritance',
            'type': 'qweb',
            'arch': view_arch,
            'inherit_id': bundle.id,
        })

        bundle1 = self._get_asset(self.cssbundle_xmlid, env=self.env(context={'check_view_ids': view.ids, 'max_css_rules': 1}))
        bundle1.css()
        files1 = bundle1.files
        remains1 = bundle1.remains
        version1 = bundle1.version

        self.assertNotEquals(files0, files1)
        self.assertEquals(remains0, remains1)
        self.assertNotEquals(version0, version1)

        # check if the previous attachment are correctly cleaned
        self.assertEquals(len(self._any_ira_for_bundle('css')), 4)

    def test_12_paginated_css_debug(self):
        """ Check that a bundle in debug mode outputs non-minified assets.
        """
        debug_bundle = self._get_asset(self.cssbundle_xmlid, env=self.env(context={'max_css_rules': 1}))
        content = debug_bundle.to_html(debug='assets')
        # find back one of the original asset file
        self.assertIn('/test_assetsbundle/static/src/css/test_cssfile1.css', content)

        # there shouldn't be any assets created in debug mode
        self.assertEquals(len(self._any_ira_for_bundle('css')), 0)

    def test_13_paginated_css_order(self):
        # self.cssbundle_xlmid contains 3 rules
        self.bundle = self._get_asset(self.cssbundle_xmlid, env=self.env(context={'max_css_rules': 1}))
        stylesheets = self.bundle.css()

        self.assertTrue(stylesheets[0].url.endswith('.0.css'))
        self.assertTrue(stylesheets[1].url.endswith('.1.css'))
        self.assertTrue(stylesheets[2].url.endswith('.2.css'))

    def test_14_duplicated_css_assets(self):
        """ Checks that if the bundle's ir.attachment record is duplicated, the bundle is only sourced once. This could
        happen if multiple transactions try to render the bundle simultaneously.
        """
        bundle0 = self._get_asset(self.cssbundle_xmlid)
        bundle0.css()
        self.assertEquals(len(self._any_ira_for_bundle('css')), 1)

        # duplicate the asset bundle
        ira0 = self._any_ira_for_bundle('css')
        ira1 = ira0.copy()
        self.assertEquals(len(self._any_ira_for_bundle('css')), 2)
        self.assertEquals(ira0.store_fname, ira1.store_fname)

        # the ir.attachment records should be deduplicated in the bundle's content
        content = bundle0.to_html()
        self.assertEqual(content.count('test_assetsbundle.bundle2.0.css'), 1)


class TestAssetsBundleInBrowser(HttpCase):
    def test_01_js_interpretation(self):
        """ Checks that the javascript of a bundle is correctly interpreted.
        """
        self.phantom_js(
            "/test_assetsbundle/js",
            "a + b + c === 6 ? console.log('ok') : console.log('error')",
            login="admin"
        )

    def test_02_js_interpretation_inline(self):
        """ Checks that the javascript of a bundle is correctly interpretet when mixed with inline.
        """
        with self.registry.cursor() as test_cursor:
            view_arch = """
            <data>
                <xpath expr="." position="inside">
                    <script type="text/javascript">
                        var d = 4;
                    </script>
                </xpath>
            </data>
            """
            self.env(cr=test_cursor)['ir.ui.view'].create({
                'name': 'test bundle inheritance inline js',
                'type': 'qweb',
                'arch': view_arch,
                'inherit_id': self.browse_ref('test_assetsbundle.bundle1').id,
            })

        self.phantom_js(
            "/test_assetsbundle/js",
            "a + b + c + d === 10 ? console.log('ok') : console.log('error')",
            login="admin",
        )


class TestAssetsBundleWithIRAMock(TransactionCase):
    def setUp(self):
        super(TestAssetsBundleWithIRAMock, self).setUp()
        self.lessbundle_xmlid = 'test_assetsbundle.bundle3'
        self.counter = counter = Counter()

        # patch methods 'create' and 'unlink' of model 'ir.attachment'
        @api.model
        def create(self, vals):
            counter.update(['create'])
            return create.origin(self, vals)

        @api.multi
        def unlink(self):
            counter.update(['unlink'])
            return unlink.origin(self)

        self.env['ir.attachment']._patch_method('create', create)
        self.addCleanup(self.env['ir.attachment']._revert_method, 'create')

        self.env['ir.attachment']._patch_method('unlink', unlink)
        self.addCleanup(self.env['ir.attachment']._revert_method, 'unlink')

    def _get_asset(self):
        files, remains = self.env['ir.qweb']._get_asset_content(self.lessbundle_xmlid, {})
        return AssetsBundle(self.lessbundle_xmlid, files, remains, env=self.env)

    def _bundle(self, asset, should_create, should_unlink):
        self.counter.clear()
        asset.to_html(debug='assets')
        self.assertEquals(self.counter['create'], int(should_create))
        self.assertEquals(self.counter['unlink'], int(should_unlink))

    def test_01_debug_mode_assets(self):
        """ Checks that the ir.attachments records created for compiled less assets in debug mode
        are correctly invalidated.
        """
        # Compile for the first time
        self._bundle(self._get_asset(), True, False)

        # Compile a second time, without changes
        self._bundle(self._get_asset(), False, False)

        # Touch the file and compile a third time
        path = get_resource_path('test_assetsbundle', 'static', 'src', 'less', 'test_lessfile1.less')
        t = time.time() + 5
        asset = self._get_asset()
        _touch(path, asset, t=t)
        self._bundle(asset, True, True)

        # Because we are in the same transaction since the beginning of the test, the first asset
        # created and the second one have the same write_date, but the file's last modified date
        # has really been modified. If we do not update the write_date to a posterior date, we are
        # not able to reproduce the case where we compile this bundle again without changing
        # anything.
        self.cr.execute("update ir_attachment set write_date=clock_timestamp() + interval '10 seconds' where id = (select max(id) from ir_attachment)")

        # Compile a fourth time, without changes
        self._bundle(self._get_asset(), False, False)