import html
from unittest.mock import Mock

import py_markdown
import py_tutor
import pyscript
import pyscript_plugins_tester as ppt

TUTOR_SOURCE = """
<py-config>
    packages = [
    "folium",
    "pandas"
    ]
    plugins = [
    "../build/plugins/python/py_tutor.py"
    ]
</py-config>

<py-script>
import folium
import json
import pandas as pd

from pyodide.http import open_url

# the rest of the code goes one
</py-script>
"""


class TestPyMarkdown:
    def test_plugin_hooks(self, monkeypatch):
        console_mock = Mock()
        monkeypatch.setattr(py_markdown, "console", console_mock)
        config = "just a config"
        interpreter = "just an interpreter"

        py_markdown.plugin.configure(config)
        console_mock.log.assert_called_with("configuration received: just a config")

        py_markdown.plugin.afterStartup(interpreter)
        console_mock.log.assert_called_with("interpreter received: just an interpreter")


class TestPyTutor:
    def check_prism_added(self):
        """
        Assert that the add_prism method has been correctly executed and the
        related prism assets have been added to the page head
        """
        # GIVEN a previous call to py_tutor.plugin.append_script_to_page
        head = pyscript.js.document.head

        # EXPECT the head to contain a link element pointing to the prism.css
        links = head.getElementsByTagName("link")
        assert len(links) == 1
        link = links[0]
        assert link.type == "text/css"
        assert link.rel == "stylesheet"
        assert link.href == "./assets/prism/prism.css"

        # EXPECT the head to contain a script src == prism.js
        scripts = head.getElementsByTagName("script")
        assert len(scripts) == 1
        script = scripts[0]
        assert script.type == "text/javascript"
        assert script.src == "./assets/prism/prism.js"

    def check_append_script_to_page(self):
        """
        Assert that the append_script_to_page has been correctly executed and the
        py_tutor.PAGE_SCRIPT code needed for the plugin JS animation has been added
        to the page body
        """
        # GIVEN a previous call to py_tutor.plugin.append_script_to_page
        body = pyscript.js.document.body

        # EXPECT the body of the page to contain a script of type text/javascript
        #        and that contains the py_tutor.PAGE_SCRIPT script
        scripts = body.getElementsByTagName("script")
        assert len(scripts) == 1
        script = scripts[0]
        assert script.type == "text/javascript"

        # Check the actual JS script code
        # To do so we have 2 methods (it depends on browser support so we check either...)
        if script.childNodes:
            # in this case it means the content has been added as a child element
            node = script.childNodes[0]
            assert node.data == py_tutor.PAGE_SCRIPT
        else:
            assert script.text == py_tutor.PAGE_SCRIPT

    def check_create_code_section(self):
        """
        Assert that the create_code_section has been correctly executed and the
        related code section has been created and added to the page.
        """
        # GIVEN a previous call to py_tutor.plugin.check_create_code_section
        console = py_tutor.js.console

        # EXPECT the console to have the messages printed by the plugin while
        #        executing the plugin operations
        console.info.assert_any_call("Creating code introspection section.")
        console.info.assert_any_call("Creating new code section element.")

        # EXPECT the page body to contain a section with the input source code
        body = pyscript.js.document.body
        sections = body.getElementsByTagName("section")
        section = sections[0]
        assert "code" in section.classList._classes
        section_innerHTML = py_tutor.TEMPLATE_CODE_SECTION.format(
            source=html.escape(TUTOR_SOURCE), modules_section=""
        )
        assert html.escape(TUTOR_SOURCE) in section.innerHTML
        assert section.innerHTML == section_innerHTML

    def test_connected_calls(self, plugins_manager: ppt.PluginsManager):
        """
        Test that all parts of the plugin have been added to the page body and head
        properly. This test effectively calls `self.check_prism_added`,
        `self.check_append_script_to_page` and `check_create_code_section` assert
        the new nodes have been added properly.
        """
        # GIVEN THAT we add the plugin to the app plugin manager
        # this will:
        # - init the plugin instance passing the plugins_manager as parent app
        # - add the plugin instance to plugins_manager.plugins
        assert not py_tutor.plugin.app
        plugins_manager.addPythonPlugin(py_tutor.plugin)

        # EXPECT: the plugin app to now be the plugin manager
        assert py_tutor.plugin.app == plugins_manager
        tutor_ce = plugins_manager._custom_elements["py-tutor"]
        # tutor_ce_python_instance = tutor_ce.pyPluginInstance
        # GIVEN: The following innerHTML on the ce elements
        tutor_ce.innerHTML = TUTOR_SOURCE

        # GIVEN: the CustomElement connectedCallback gets called
        tutor_ce.connectedCallback()

        # EXPECT: the
        self.check_prism_added()

        self.check_append_script_to_page()

        self.check_create_code_section()

    def test_plugin_registered(self, plugins_manager: ppt.PluginsManager):
        """
        Test that, when registered, plugin actually has an app attribute set
        and that it's present in plugins manager plugins list.
        """
        # EXPECT py_tutor.plugin to not have any app associate
        assert not py_tutor.plugin.app

        # EXPECT: the plugin manager to not have any plugin registered
        assert not plugins_manager.plugins

        # GIVEN THAT we add the plugin to the app plugin manager
        plugins_manager.addPythonPlugin(py_tutor.plugin)

        # EXPECT: the plugin app to now be the plugin manager
        assert py_tutor.plugin.app == plugins_manager
        assert "py-tutor" in py_tutor.plugin._custom_elements

        # EXPECT: the pytutor.plugin manager to be part of
        assert py_tutor.plugin in plugins_manager.plugins