"""Obsidian Import.

Sub-module for importing time-based data into Obsidian.
"""

import datetime
from logging import getLogger
from pathlib import Path
from typing import Any

from personal_data.util import load_csv_file

from .obsidian import Event, ObsidianVault

logger = getLogger(__name__)

Row = dict[str, Any]
Rows = list[Row]


def import_workout_csv(vault: ObsidianVault, rows: Rows) -> int:
    num_updated = 0
    for row in rows:
        date = row['Date']
        was_updated = False
        mapping = {
            'Cycling (mins)': ('Cycling (Duration)', 'minutes'),
            'Cycling (kcals)': ('Cycling (kcals)', ''),
            'Weight (Kg)': ('Weight (Kg)', ''),
        }

        for input_key, (output_key, unit) in mapping.items():
            v = row.get(input_key)
            if v is not None:
                if unit:
                    v = str(v) + ' ' + unit
            was_updated |= vault.add_statistic(date, output_key, v)
            if input_key != output_key:
                was_updated |= vault.add_statistic(date, input_key, None)
            del input_key, output_key, unit, v

        if was_updated:
            num_updated += 1
        del row, date
    return num_updated


def import_step_counts_csv(vault: ObsidianVault, rows: Rows) -> int:
    MINIMUM = 300

    num_updated = 0

    rows_per_date = {}
    for row in rows:
        date = row['Start'].date()
        rows_per_date.setdefault(date, [])
        rows_per_date[date].append(row)
        del date, row

    steps_per_date = {
        date: sum(row['Steps'] for row in rows) for date, rows in rows_per_date.items()
    }

    for date, steps in steps_per_date.items():
        if steps < MINIMUM:
            continue
        was_updated = vault.add_statistic(date, 'Steps', steps)
        if was_updated:
            num_updated += 1
        del date, steps, was_updated

    return num_updated


def import_watched_series_csv(vault: ObsidianVault, rows: Rows) -> int:
    # TODO: Update to using git_time_tracker event parsing system
    verb = 'Watched'

    num_updated = 0

    rows_per_date = {}
    for row in rows:
        date = row['me.last_played_time'].date()
        rows_per_date.setdefault(date, [])
        rows_per_date[date].append(row)
        del date, row
    del rows

    def map_to_event(row: Row) -> Event:
        start = (
            row['me.last_played_time'].time().replace(second=0, microsecond=0, fold=0)
        )
        end = start
        comment = '{} Episode {}: *{}*'.format(
            row['season.name'],
            row['episode.index'],
            row['episode.name'],
        )
        return Event(start, end, verb, row['series.name'], comment)

    for date, rows in rows_per_date.items():
        events = [map_to_event(row) for row in rows]
        was_updated = vault.add_events(date, events)

        if was_updated:
            num_updated += 1
        del date, was_updated

    return num_updated


def import_data(obsidian_path: Path, dry_run=True):
    vault = ObsidianVault(obsidian_path, read_only=dry_run and 'silent' or None)

    if False:
        data_path = Path('/home/jmaa/Notes/workout.csv')
        rows = load_csv_file(data_path)
        logger.info('Loaded CSV with %d lines', len(rows))
        num_updated = import_workout_csv(vault, rows)
        logger.info('Updated %d files', num_updated)

    if False:
        data_path = Path(
            '/home/jmaa/personal-archive/misc-data/step_counts_2023-07-26_to_2024-09-21.csv',
        )
        rows = load_csv_file(data_path)
        logger.info('Loaded CSV with %d lines', len(rows))
        num_updated = import_step_counts_csv(vault, rows)
        logger.info('Updated %d files', num_updated)

    if True:
        data_path = Path('output/show_episodes_watched.csv')
        rows = load_csv_file(data_path)
        logger.info('Loaded CSV with %d lines', len(rows))
        rows = rows[:7]
        num_updated = import_watched_series_csv(vault, rows)
        logger.info('Updated %d files', num_updated)