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

from action import record_action
from action import set_active
from action import TypeAction

from args import get_string_arg
from args import arg_number

class Project:
    def __init__(self, status = None):
        self.name = None
        self.status = status

    def __str__(self):
        return str(self.__dict__)

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

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

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

        project = Project('active')
        project.name = get_string_arg(args[1:], 'project name')
        parse_project_args(project, args[2:])
        create_project(project, conn)
    elif args[0] == '-e':
        if len(args) == 1:
            print('nothing to update')
            sys.exit(1)

        project = Project()

        if args[1].isdigit():
            project_id = int(args[1])
            parse_project_args(project, args[2:])
        else:
            project_id = last_action.project_id
            parse_project_args(project, args[1:])
        logging.debug('Project: ({}) {}'.format(project_id, project))

        edit_project(project, project_id, conn)
        # TODO To set as active project, us a -a option?

    elif args[0] == '-d':
        if len(args) > 1:
            delete_project(arg_number(args[1]), conn)
        else:
            delete_project(last_action.project_id, conn)
    else:
        print(f'Invalid project option: {args[0]}')

def parse_project_args(project, args):
    if not args:
        return

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

        if args[i] == '-s':
            i += 1
            project.status = get_string_arg(args[i:i+1], 'project status')
        elif args[i] == '-n':
            i += 1
            project.name = get_string_arg(args[i:i+1], 'project name')
        else:
            print(f'Invalid project option: {args[i]}')
            sys.exit(1)
        i += 1

def create_project(project, conn):
    # TODO Project is same name is forbidden
    logging.info('>> Create project')

    query = """
    INSERT INTO project (username, name, status, created_at)
    VALUES (?, ?, ?, ?);
    """

    cursor = conn.cursor()
    cursor.execute(query, (getpass.getuser(), project.name, project.status, datetime.datetime.now(),))
    project_id = cursor.lastrowid
    action_message = '{} (status: {})'.format(project.name, project.status)

    record_action(cursor, TypeAction.CREATE, action_message, project_id=project_id)
    logging.debug(action_message)

    print('created project {}: {} (status: {})'.format(project_id, project.name, project.status))

def edit_project(project, project_id, conn):
    logging.info('>> Edit project')

    update_args = [item for item in project.__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 project, just do '{} project <project_id>'"
            .format(os.path.basename(sys.argv[0])))
        sys.exit(1)

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

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

    cursor = conn.cursor()
    logging.debug('Do a project update')
    cursor.execute(query, (project_id,))

    log_args = ', '.join("%s: %s" % (k, v) for k, v in update_args)
    print('updated project {}: ({})'.format(project_id, log_args))
    # TODO Print project name ?

    record_action(cursor, TypeAction.UPDATE, '({})'.format(log_args), project_id)

def delete_project(project_id, conn):
    logging.info('>> Remove project')

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

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

    print('deleted project {}: {}'.format(project_id, 'project_name'))
    record_action(cursor, TypeAction.DELETE, '', project_id)
    # TODO Cascade deleting

def list_project(active_project_id, conn):
    query = """
    SELECT id, username, name, status,
        (SELECT count(*) FROM task WHERE task.project_id = project.id)
    FROM project;
    """

    cursor = conn.cursor()
    cursor.execute(query)
    for row in cursor.fetchall():
        logging.debug('Project row: {}'.format(row))
        project_id, username, name, status, nb_task = row
        # TODO Formatting track: https://stackoverflow.com/questions/9989334/create-nice-column-output-in-python
        print('{:1} {:2d}: ({:8}) | {} | {} ({} tasks)'.format('*' if active_project_id == project_id else '',
            project_id, username, status, name, nb_task))

def view_project_set_active(project_id, last_action, conn):
    # FIXME duplicate with list_project
    query = """
    SELECT id, username, name, status,
        (SELECT count(*) FROM task WHERE task.project_id = project.id)
    FROM project WHERE id = ?;
    """

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

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

    # FIXME duplicate with list_task
    query = """
    SELECT id, username, name, status, priority, date, time,
        (SELECT count(*) FROM note WHERE note.task_id = task.id)
    FROM task WHERE project_id = ?
    """
    cursor.execute(query, (project_id,))
    for row in cursor.fetchall():
        logging.debug('Task row: {}'.format(row))
        task_id, username, name, status, priority, date, time, nb_note = row
        message = date + time + name
        print('   {} {:d}: ({}) [{}] [{}] {} ({} tasks)'.format('*' if last_action.task_id == row[0] else ' ',
            task_id, username, status, priority, message, nb_note))

    set_active(cursor, project_id=project_id)

    # TODO Add a -v option to see notes?