#!/usr/bin/env python3.7

import sqlite3
import click
from pathlib import Path

HAMSTER_FILE = Path.home() / '.local/share/hamster-applet/hamster.db'

conn = sqlite3.connect(HAMSTER_FILE)
c = conn.cursor()


def get_categories(ids=None, search=None):
    sql = '''
    SELECT 
        id, name
    FROM 
        categories '''

    args = []

    if ids is not None:
        sql = sql + 'WHERE id IN ({seq})'.format(
            seq=','.join(['?'] * len(ids))
        )
        args = args + list(ids)

    if search is not None:
        sql = sql + " WHERE name LIKE ?"
        search = '%{0}%'.format(search)
        args.append(search)

    results = c.execute(sql, args)

    results = c.fetchall()

    return results


def get_activities(ids=None, search=None):
    sql = '''
    SELECT 
        activities.id, activities.name, categories.name, categories.id
    FROM 
        activities
    LEFT JOIN
        categories
    ON
        activities.category_id = categories.id '''

    args = []

    if ids is not None:
        sql = sql + 'WHERE activities.id IN ({seq})'.format(
            seq=','.join(['?'] * len(ids))
        )
        args = args + list(ids)

    if search is not None:
        sql = sql + " WHERE activities.name LIKE ?"
        search = '%{0}%'.format(search)
        args.append(search)

    results = c.execute(sql, args)
    results = c.fetchall()

    return results


@click.group()
def cli():
    pass


@cli.group()
def categories():
    pass
    

@categories.command('list')
@click.option('--search', help='Search string')
def list_categories(search):
    """ List / search categories  """
    results = get_categories(search=search)

    for r in results:
         click.echo('@{0[0]}: {0[1]}'.format(r))


@categories.command('delete')
@click.argument('ids', nargs=-1)
def delete_categories(ids):
    """ Delete categories specified by IDS """
    click.secho('Deleting:', fg='red')

    results = get_categories(ids)

    for r in results:
        sql = 'SELECT COUNT(id) FROM activities WHERE category_id = ?'
        count = c.execute(sql, (r[0],)).fetchone()[0]
        click.echo('@{0[0]}: {0[1]} ({1} activities)'.format(r, count))

    click.confirm('Do you want to continue?', abort=True)

    sql = 'DELETE FROM categories '

    sql = sql + 'WHERE id IN ({seq})'.format(
        seq=','.join(['?'] * len(ids))
    )

    c.execute(sql, ids)
    conn.commit()

    click.secho('Deleted {0} categories'.format(len(ids)), fg='green')


@categories.command('activities')
@click.argument('ids', nargs=-1)
def list_category_activities(ids):
    """ Show activities for categories specified by IDS """
    sql = '''
    SELECT 
        activities.id, activities.name, categories.name
    FROM 
        activities
    LEFT JOIN
        categories
    ON
        activities.category_id = categories.id 
    WHERE 
        categories.id IN ({seq})
    '''.format(
        seq=','.join(['?'] * len(ids))
    )

    results =  c.execute(sql, ids)

    for r in results:
         click.echo('@{0[0]}: {0[2]} » {0[1]}'.format(r))


@cli.group()
def activities():
    pass


@activities.command('list')
@click.option('--search', help='Search string')
def list_activities(search):
    """ List / search activities """

    results = get_activities(search=search)

    for r in results:
         click.echo('@{0[3]}: {0[2]} » {0[0]}: {0[1]}'.format(r))


@activities.command('delete')
@click.argument('ids', nargs=-1)
def delete_activities(ids):
    """ Delete activities specified by IDS """

    results = get_activities(ids)

    click.secho('Deleting:', fg='red')

    for r in results:
        sql = "SELECT COUNT(id) FROM facts WHERE activity_id = ?"
        count = c.execute(sql, (r[0],)).fetchone()[0]
        click.echo('@{0[0]}: {0[2]} » {0[1]} ({1} facts)'.format(r, count))

    click.confirm('Do you want to continue?', abort=True)

    sql = 'DELETE FROM activities '

    sql = sql + 'WHERE id IN ({seq})'.format(
        seq=','.join(['?'] * len(ids))
    )

    c.execute(sql, ids)
    conn.commit()

    click.secho('Deleted {0} activities'.format(len(ids)), fg='green')


@activities.command()
@click.argument('category_id')
@click.argument('ids', nargs=-1)
def move(category_id, ids):
    """ Move activities to another category """
    category = get_categories((category_id,))[0]
    results = get_activities(ids)

    click.secho('Moving to "@{0[0]}: {0[1]}":'.format(category), fg='green')

    for r in results:
         click.secho('@{0[3]}: {0[2]} » @{0[0]}: {0[1]}'.format(r), fg='blue')

    click.confirm('Do you want to continue?', abort=True)

    sql = '''
    UPDATE
        activities
    SET
        category_id = ?
    '''

    sql = sql + 'WHERE id IN ({seq})'.format(
        seq=','.join(['?'] * len(ids))
    )

    c.execute(sql, (category[0], *ids))
    conn.commit()

    click.secho('Moved {0} activities'.format(len(ids)), fg='green')


@activities.command()
@click.argument('ids', nargs=-1)
def list_facts(ids):
    """ Show facts for activities """

    results = get_activities(ids)

    for r in results:
        click.secho(
            '@{0[0]}: {0[1]}'.format(r), fg='green'
        )

        sql = '''
        SELECT
            start_time,
            activities.name
        FROM
            facts
        LEFT JOIN
            activities
        ON
            facts.activity_id = activities.id
        WHERE
            activities.id = ?
        '''

        results = c.execute(sql, (r[0],))

        for r in results:
             click.secho('@{0[0]}, {0[1]}'.format(r), fg='blue')

@activities.command()
@click.argument('from_id')
@click.argument('to_id')
def move_facts(from_id, to_id):
    """ Move facts from one activity to another """
    from_activity = get_activities((from_id,))[0]
    to_activity = get_activities((to_id,))[0]

    click.secho(
        'Moving facts from "@{0[0]}: {0[1]}" to "@{1[0]}: {1[1]}"'.format(
            from_activity, to_activity
        ), fg='green'
    )

    sql = '''
    SELECT
        start_time,
        activities.name
    FROM
        facts
    LEFT JOIN
        activities
    ON
        facts.activity_id = activities.id
    WHERE
        activities.id = ?
    '''

    results = c.execute(sql, (from_id,))

    for r in results:
         click.secho('@{0[0]}, {0[1]}'.format(r), fg='blue')

    click.confirm('Do you want to continue?', abort=True)

    c.execute(
        'UPDATE facts SET activity_id = ? WHERE activity_id = ?',
        (to_id, from_id)
    )

    conn.commit()

    click.secho('Moved {0} facts'.format(results.rowcount), fg='green')


@activities.command()
def find_duplicates():
    """ Show activities which are not unique in their categories """

    sql = '''
    SELECT
        categories.id,
        categories.name,
        activities.id,
        activities.name,
        COUNT(activities.id) c
    FROM
        activities
    LEFT JOIN
        categories
    ON
        activities.category_id = categories.id
    GROUP BY 
        activities.name, 
        activities.category_id 
    HAVING c > 1
    '''

    results = c.execute(sql)

    for r in results:
         click.secho('@{0[0]}: {0[1]} » @{0[2]}: {0[3]} ({0[4]})'.format(r), fg='blue')


@cli.command()
def hamster():
    click.echo('🐹')


if __name__ == "__main__":
    cli()