"""
Sample plugin which renders custom panels on certain pages
"""

from part.views import PartDetail
from plugin import InvenTreePlugin
from plugin.mixins import PanelMixin, SettingsMixin
from stock.views import StockLocationDetail


class CustomPanelSample(PanelMixin, SettingsMixin, InvenTreePlugin):
    """
    A sample plugin which renders some custom panels.
    """

    NAME = "CustomPanelExample"
    SLUG = "samplepanel"
    TITLE = "Custom Panel Example"
    DESCRIPTION = "An example plugin demonstrating how custom panels can be added to the user interface"
    VERSION = "0.1"

    SETTINGS = {
        'ENABLE_HELLO_WORLD': {
            'name': 'Enable Hello World',
            'description': 'Enable a custom hello world panel on every page',
            'default': False,
            'validator': bool,
        },
        'ENABLE_BROKEN_PANEL': {
            'name': 'Enable Broken Panel',
            'description': 'Enable a panel with rendering issues',
            'default': False,
            'validator': bool,
        }
    }

    def get_panel_context(self, view, request, context):

        ctx = super().get_panel_context(view, request, context)

        # If we are looking at a StockLocationDetail view, add location context object
        if isinstance(view, StockLocationDetail):
            ctx['location'] = view.get_object()

        return ctx

    def get_custom_panels(self, view, request):

        """
        You can decide at run-time which custom panels you want to display!

        - Display on every page
        - Only on a single page or set of pages
        - Only for a specific instance (e.g. part)
        - Based on the user viewing the page!
        """

        panels = [
            {
                # Simple panel without any actual content
                'title': 'No Content',
            }
        ]

        if self.get_setting('ENABLE_HELLO_WORLD'):

            # We can use template rendering in the raw content
            content = """
            <strong>Hello world!</strong>
            <hr>
            <div class='alert-alert-block alert-info'>
                <em>We can render custom content using the templating system!</em>
            </div>
            <hr>
            <table class='table table-striped'>
                <tr><td><strong>Path</strong></td><td>{{ request.path }}</tr>
                <tr><td><strong>User</strong></td><td>{{ user.username }}</tr>
            </table>
            """

            panels.append({
                # This 'hello world' panel will be displayed on any view which implements custom panels
                'title': 'Hello World',
                'icon': 'fas fa-boxes',
                'content': content,
                'description': 'A simple panel which renders hello world',
                'javascript': 'console.log("Hello world, from a custom panel!");',
            })

        if self.get_setting('ENABLE_BROKEN_PANEL'):

            # Enabling this panel will cause panel rendering to break,
            # due to the invalid tags
            panels.append({
                'title': 'Broken Panel',
                'icon': 'fas fa-times-circle',
                'content': '{% tag_not_loaded %}',
                'description': 'This panel is broken',
                'javascript': '{% another_bad_tag %}',
            })

        # This panel will *only* display on the PartDetail view
        if isinstance(view, PartDetail):
            panels.append({
                'title': 'Custom Part Panel',
                'icon': 'fas fa-shapes',
                'content': '<em>This content only appears on the PartDetail page, you know!</em>',
            })

        # This panel will *only* display on the StockLocation view,
        # and *only* if the StockLocation has *no* child locations
        if isinstance(view, StockLocationDetail):

            try:
                loc = view.get_object()

                if not loc.get_descendants(include_self=False).exists():
                    panels.append({
                        'title': 'Childless Location',
                        'icon': 'fa-user',
                        'content_template': 'panel_demo/childless.html',  # Note that the panel content is rendered using a template file!
                    })
            except:  # pragma: no cover
                pass

        return panels