# import sqlite3
import os
import argparse
import json
import getpass
import datetime
import logging
import sys

from action import record_action
from action import TypeAction
from args import get_string_arg
from args import arg_number

class Task:
    def __init__(self, status = None, priority = None):
        self.name = None
        self.status = status
        self.priority = priority
        self.date = None
        self.time = None

def handle_task(args, last_action, conn):
    logging.info('> handle task')
    logging.debug('args: ' + str(args))

    if not args:
        list_task(last_action.project_id, last_action.task_id, conn)
        sys.exit(0)

    if args[0].isdigit():
        view_task_set_active(arg_number(args[0]), last_action, conn)
    elif args[0] == '-c':
        if len(args) == 1:
            print('missing task name')
            sys.exit(1)

        task = Task('open', 'normal')
        task.name = get_string_arg(args[1:], 'task name')
        parse_task_args(task, args[2:])
        create_task(task, last_action.project_id, conn)
    elif args[0] == '-e':
        if len(args) == 1:
            print('nothing to update')
            sys.exit(1)

        task = Task()

        if args[1].isdigit():
            task_id = int(args[1])
            parse_task_args(task, args[2:])
        else:
            task_id = last_action.task_id # FIXME If no active tast - use incremental args_i
            parse_task_args(task, args[1:])
        logging.debug('Task: ({}) {}'.format(task_id, task))

        edit_task(task, task_id, last_action.project_id, conn)
        # TODO To set as active project, us a -a option?
    elif args[0] == '-d':
        # FIXME Duplicate code
        if len(args) > 1:
            delete_task(arg_number(args[1]),last_action.project_id, conn)
        else:
            delete_task(last_action.task_id,last_action.project_id, conn)
    elif args[0] == '-m':
        # Try another logic
        args_i = 1
        if len(args) < 3:
            print('missing project number')
            sys.exit(1)

        task_id = last_action.task_id

        # Task id
        if args[args_i].isdigit():
            task_id = arg_number(args[args_i])
            args_i += 1

        if not task_id:
            print('No active task to move.')
            sys.exit(1)

        # Project option - if not fail
        if args[args_i] != '-p':
            print('missing project number')
            sys.exit(1)
        else:
            args_i += 1

        moving_task(task_id, last_action.project_id, arg_number(args[args_i]), conn)
    else:
        print(f'Invalid task option: {args[0]}')

        # TODO Cascade deleting

def parse_task_args(task, args):
    if not args:
        return

    i = 0
    while i < len(args):
        logging.debug(args[i])

        if args[i] == '-s':
            i += 1
            task.status = get_string_arg(args[i:i+1], 'task status')
        elif args[i] == '-n':
            i += 1
            task.name = get_string_arg(args[i:i+1], 'task name')
        elif args[i] == '-p':
            i += 1
            task.priority = get_string_arg(args[i:i+1], 'task priority')
        elif args[i] == '-d':
            i += 1
            task.date = get_string_arg(args[i:i+1], 'task date')
        elif args[i] == '-t':
            i += 1
            task.time = get_string_arg(args[i:i+1], 'task time')
        else:
            print(f'Invalid task option: {args[i]}')
            sys.exit(1)
        i += 1


def create_task(task, project_id, conn):
    # TODO Don't create task if no project (nothing selected?) ==> foreign key is not a solution: there is no project ID :)
    logging.info('>> Create task')

    query = """
    INSERT INTO
        task (project_id, username, name, status, priority, date, time, created_at)
    VALUES (?, ?, ?, ?, ?, ?, ?, ?);
    """

    # TODO Date & time
    date = ''
    time = ''

    cursor = conn.cursor()
    cursor.execute(query, (project_id, getpass.getuser(), task.name, task.status,
        task.priority, date, time, datetime.datetime.now(),))

    task_id = cursor.lastrowid

    logging.debug('CREATE ACTION ' + str(project_id) + str(task_id) )

    task_details = [item for item in task.__dict__.items() if item[1] is not None and item[0] is not 'name']
    log_args = ', '.join("%s: %s" % (k, v) for k, v in task_details)

    action_message = '{} ({}, project: {})'.format(task.name, log_args, project_id)

    record_action(cursor, TypeAction.CREATE, action_message, project_id, task_id)
    print('created task {}: {}'.format(task_id, action_message))

def edit_task(task, task_id, project_id, conn):
    logging.info('>> Edit task')

    update_args = [item for item in task.__dict__.items() if item[1] is not None]

    if not update_args:
        print("nothing to update")
        print("Tips: if you want to set an active task, just do '{} task <task_id>'"
            .format(os.path.basename(sys.argv[0])))
        sys.exit(1)

    logging.debug('Task update args: {}'.format(update_args))

    query = 'UPDATE task SET {} WHERE id = ?'
    query = query.format(', '.join("%s = '%s'" % (k, v) for k, v in update_args))
    logging.debug('update task query: ' + query)

    cursor = conn.cursor()
    logging.debug('Do a task update')
    cursor.execute(query, (task_id,))
    log_args = ', '.join("%s: %s" % (k, v) for k, v in update_args)
    action_message = '{} ({})'.format(task_id, ', '.join("%s: %s" % (k, v) for k, v in update_args))
    # TODO Review action message (at the end)
    print('updated task {}: ({})'.format(task_id, log_args))

    # TODO Retrieve project id ?
    logging.debug('UPDATE TASK - ACTION MESSAGE : ' + action_message)
    record_action(cursor, TypeAction.UPDATE, action_message, project_id, task_id)

def moving_task(task_id, old_project_id, project_id, conn):
    logging.info('>> Moving task')

    query = """
    UPDATE task SET project_id = ? WHERE id = ?;
    """

    cursor = conn.cursor()
    cursor.execute(query, (project_id, task_id,))

    if cursor.rowcount != 1:
        print('Problem occur when moving task...')
        sys.exit(1)

    print('moved task {}: from project {} to project {}'.format(task_id, old_project_id, project_id))
    record_action(cursor, TypeAction.MOVE, '', project_id=project_id, task_id=task_id) # TODO Message

def delete_task(task_id, project_id, conn):
    logging.info('>> Remove task')

    query = """
    DELETE FROM task
    WHERE id = ?;
    """

    cursor = conn.cursor()
    cursor.execute(query, (task_id,))
    if cursor.rowcount != 1:
        logging.error('DELETE FAILED')
        print('could not find task {}'.format(task_id))
        sys.exit(1)

    print('deleted task {}: {}'.format(task_id, 'task_name'))
    record_action(cursor, TypeAction.DELETE, '', project_id, None) # TODO Message

def list_task(active_project_id, active_task_id, conn):
    logging.info('>> No arguments')

    query = """
    SELECT id, username, status, priority, name,
        (SELECT count(*) FROM note WHERE note.task_id = task.id)
     FROM task WHERE project_id = ?;
     """ #TODO Date & time

    cursor = conn.cursor()
    cursor.execute(query, (active_project_id,))
    for row in cursor.fetchall():
        task_id, username, status, priority, name, nb_note = row
        print('{:1} {:2d}: ({:8}) | {} | {} | {} ({} notes)'.format('*' if active_task_id == task_id else '', task_id,
            username, status, priority, name, nb_note))
        # TODO Note

        #   2: (budd) |open| |normal|              test (0 notes)
        # * 3: (budd) |open| |normal| Dec 31, 2018 tet  (0 notes)

def view_task_set_active(task_id, last_action, conn):
    # FIXME duplicate with list_task / view_project_set_active
    query = """
    SELECT id, username, status, priority, name,
        (SELECT count(*) FROM note WHERE note.task_id = task.id)
     FROM task WHERE id = ?;
     """ #TODO Date & time

    cursor = conn.cursor()
    cursor.execute(query, (task_id,))
    row = cursor.fetchone()
    if not row:
        print('Could not find task {}'.format(task_id))
        sys.exit(1)

    print('* {:d}: ({}) {} (status: {}, {} tasks)'.format(*row))

    # FIXME duplicate with list_note
    query = """
    SELECT id, username, message FROM note WHERE task_id = ?
    """
    cursor.execute(query, (task_id,))
    for row in cursor.fetchall():
        logging.debug('Note row: {}'.format(row))
        note_id, username, message = row
        print('   {} {:d}: ({}) {}'.format('*' if last_action.note_id == row[0] else ' ',
            note_id, username, message))
    record_action(cursor, TypeAction.ACTIVE, 'set active task ' + str(task_id),
        last_action.project_id, last_action.task_id, last_action.note_id)

# $ pit t 11
# * 11: (budd) a task (project: 1, status: in progress, priority: high, date: Apr 26, 2018, time: 5:00, 2 notes)
#      6: (budd) bonjour le monde
#    * 7: (budd) bonjour le monde