"""Definitions for attribute table."""
from qgis.core import QgsAttributeTableConfig, QgsVectorLayer

from lizmap.definitions.base import BaseDefinitions, InputType
from lizmap.toolbelt.i18n import tr

__copyright__ = 'Copyright 2020, 3Liz'
__license__ = 'GPL version 3'
__email__ = 'info@3liz.org'


def layer_has_custom_attribute_table(layer: QgsVectorLayer) -> bool:
    # Do not use the isEmpty() on the QgsVectorLayer. It's automatically populated if empty with the fields.
    config = QgsAttributeTableConfig()
    config.update(layer.fields())
    return not config.hasSameColumns(layer.attributeTableConfig())


class AttributeTableDefinitions(BaseDefinitions):

    def __init__(self):
        super().__init__()
        self._layer_config['layerId'] = {
            'type': InputType.Layer,
            'wfs_required': True,
            'header': tr('Layer'),
            'default': None,
            'tooltip': tr('The vector layer for the attribute table.')
        }
        self._layer_config['primaryKey'] = {
            'type': InputType.PrimaryKeyField,
            'wfs_required': True,
            'header': tr('Primary key'),
            'default': None,
            'tooltip': tr('Primary key of the layer.')
        }
        self._layer_config['hiddenFields'] = {
            'type': InputType.Fields,
            'wfs_required': False,
            'header': tr('Fields to hide'),
            'default': '',
            'tooltip': tr('List of fields to hide in the attribute table.')
        }
        self._layer_config['pivot'] = {
            'type': InputType.CheckBox,
            'header': tr('Pivot table'),
            'default': False,
            'tooltip': tr('If the table is a pivot, used in a many-to-many relationship.')
        }
        self._layer_config['hideAsChild'] = {
            'type': InputType.CheckBox,
            'header': tr('Hide in child sub-panels'),
            'default': False,
            'tooltip': tr('Do not display the layer in a relation when the layer is a child.')
        }
        self._layer_config['hideLayer'] = {
            'type': InputType.CheckBox,
            'header': tr('Hide layer in list'),
            'default': False,
            'tooltip': tr(
                'No button "Detail" will be shown in Lizmap to open the attribute table, but related '
                'features such as selection and filter will be available.'),
        }
        self._layer_config['custom_config'] = {
            'type': InputType.CheckBox,
            'header': tr('Custom configuration'),
            'default': layer_has_custom_attribute_table,
            'tooltip': tr(
                'Read only field. If the attribute table has a custom order and/or some fields are hidden. '
                'This configuration is in the attribute table, not in the Layer Properties.'),
            'read_only': True,
        }

        self._general_config['limitDataToBbox'] = {
            'type': InputType.CheckBox,
            'default': False,
        }

    @staticmethod
    def primary_keys() -> tuple:
        return 'layerId',

    def key(self) -> str:
        return 'attributeLayers'

    def help_path(self) -> str:
        return 'publish/lizmap_plugin/attribute_table.html'
