from textual.app import App, ComposeResult
from textual.binding import Binding
from textual.widgets import Header, Footer, DataTable, Input
from textual.containers import Horizontal, Vertical
from textual.coordinate import Coordinate
from textual.screen import Screen
from textual.reactive import reactive

from .db import DatabaseManager, Category, Activity

class ActivitiesScreen(Screen):
    BINDINGS = [
        ("q", "quit", "Quit"),
        ("s", "sort", "Sort"),
        ("r", "refresh", "Refresh"),
        ("d", "delete", "Delete activity"),
        ("/", "filter", "Search"),
        Binding(key="escape", action="cancelfilter", show=False),
    ]

    def __init__(self, db_manager):
        self.db_manager = db_manager
        super().__init__()

    def _refresh(self, filter_query=None):
        self.table.clear()

        # List activities with the count of facts
        activities = Activity.list_activities(self.db_manager, filter_query)

        self.table.add_rows([[
            activity.category_id,
            activity.category_name,
            activity.id,
            activity.name,
            activity.facts_count,
        ] for activity in activities])

        self.table.sort(*self.sort)

    def compose(self) -> ComposeResult:
        """create child widgets for the app."""
        yield Header()
        with Vertical():
            yield DataTable()
            with Horizontal():
                yield Input(id="filter")
        yield Footer()

    def on_mount(self) -> None:
        self.table = self.query_one(DataTable)
        self.table.cursor_type = "row"
        self.columns = self.table.add_columns("category id","category","activity id","activity","entries")
        self.sort = (self.columns[1], self.columns[3])
        self._refresh()

    def action_refresh(self) -> None:
        self._refresh()

    def action_sort(self) -> None:
        self.table.cursor_type = "column"

    def action_filter(self) -> None:
        filter_input = self.query_one("#filter")
        filter_input.display = True
        filter_input.focus()
        print(filter_input)

    def action_cancelfilter(self) -> None:
        filter_input = self.query_one("#filter")
        filter_input.display = False
        self._refresh()

    def action_delete(self) -> None:
         # get the keys for the row and column under the cursor.
        row_key, _ = self.table.coordinate_to_cell_key(self.table.cursor_coordinate)

        activity_id = self.table.get_cell_at(
            Coordinate(self.table.cursor_coordinate.row, 2),
        )

        activity = Activity.get_by_id(self.db_manager, activity_id)
        activity.delete()

        # supply the row key to `remove_row` to delete the row.
        self.table.remove_row(row_key)

    def on_data_table_column_selected(self, event):
        self.sort = (event.column_key,)
        event.data_table.sort(*self.sort)
        event.data_table.cursor_type = "row"

    def on_input_changed(self, event):
        self._refresh(event.value)


class CategoriesScreen(Screen):
    BINDINGS = [
        ("s", "sort", "Sort"),
        ("r", "refresh", "Refresh"),
        ("d", "delete", "Delete category"),
        ("/", "filter", "Search"),
        Binding(key="escape", action="cancelfilter", show=False),
    ]

    filtering = reactive(False)
    filter_query = reactive("")

    def __init__(self, db_manager):
        self.db_manager = db_manager
        super().__init__()

    def _refresh(self, filter_query=None):
        self.table.clear()

        categories = Category.list_categories(self.db_manager,
                                              filter_query=filter_query)

        self.table.add_rows([[
            category.id,
            category.name,
            category.activity_count,
        ] for category in categories])

        self.table.sort(self.sort)

    def compose(self) -> ComposeResult:
        """create child widgets for the app."""
        yield Header()
        with Vertical():
            yield DataTable()
            with Horizontal():
                yield Input(id="filter")
        yield Footer()

    def on_mount(self) -> None:
        self.table = self.query_one(DataTable)
        self.table.cursor_type = "row"
        self.columns = self.table.add_columns("category id","category","activities")
        self.sort = self.columns[1]
        self._refresh()

    def action_refresh(self) -> None:
        self._refresh()

    def action_sort(self) -> None:
        self.table.cursor_type = "column"

    def action_filter(self) -> None:
        filter_input = self.query_one("#filter")
        filter_input.display = True
        filter_input.focus()
        print(filter_input)

    def action_cancelfilter(self) -> None:
        filter_input = self.query_one("#filter")
        filter_input.display = False
        self._refresh()

    def on_input_changed(self, event):
        self._refresh(event.value)

    def action_delete(self) -> None:
        # get the keys for the row and column under the cursor.
        row_key, _ = self.table.coordinate_to_cell_key(self.table.cursor_coordinate)

        category_id = self.table.get_cell_at(
            Coordinate(self.table.cursor_coordinate.row, 0),
        )
        category = Category.get_by_id(self.db_manager, category_id)
        category.delete()

        # supply the row key to `remove_row` to delete the row.
        self.table.remove_row(row_key)

    def on_data_table_column_selected(self, event):
        """ Handle column selection for sort """
        self.sort = event.column_key
        event.data_table.sort(self.sort)
        event.data_table.cursor_type = "row"

# class KimaiScreen(Screen):
#     def compose(self) -> ComposeResult:
#         yield Placeholder("Help Screen")
#         yield Footer()
#
#     def __init__(self, db_cursor, db_connection):
#         self.db_cursor = db_cursor
#         self.db_connection = db_connection
#         super().__init__()


class HamsterToolsApp(App):
    CSS_PATH = 'app.tcss'
    BINDINGS = [
        ("a", "switch_mode('activities')", "Activities"),
        ("c", "switch_mode('categories')", "Categories"),
        # ("k", "switch_mode('kimai')", "Kimai"),
        ("q", "quit", "Quit"),
    ]

    def __init__(self):
        self.db_manager = DatabaseManager('hamster-testing.db')

        self.MODES = {
            "categories": CategoriesScreen(self.db_manager),
            "activities": ActivitiesScreen(self.db_manager)
            # "kimai": KimaiScreen,
        }

        super().__init__()

    def on_mount(self) -> None:
        self.switch_mode("activities")

    def action_quit(self) -> None:
        self.exit()
        self.db_manager.close()