# import sqlite3
import getpass
import datetime
import logging
import sys
import sqlite3

import task

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

from utils import get_pits_path


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: %s", 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: (%s) %s", project_id, project)

        edit_project(project, project_id, conn)

    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):
    logging.info(">> Create project")

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

    cursor = conn.cursor()
    try:
        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
            )
        )
    except sqlite3.IntegrityError as error:
        print("project with the same name already exists")
        logging.info(error)


def edit_project(project, project_id, conn):
    # FIXME Duplicate code with edit_task
    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 active a project, just do '{} project <project_id>'".format(
                get_pits_path()
            )
        )
        sys.exit(1)

    logging.debug("Project update args: %s", update_args)

    # Retrieve name if not updated
    project_name = None
    if "name" not in update_args[0]:
        project_name = get_project_name(project_id, conn)

    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: %s", 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)

    if project_name:
        log_message = "{} ({})".format(project_name, log_args)
    else:
        log_message = "({})".format(log_args)

    print("updated project {}: {}".format(project_id, log_message))

    record_action(cursor, TypeAction.UPDATE, log_message, project_id)


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

    project_name = get_project_name(project_id, conn)

    cursor = conn.cursor()

    # Cascade deleting: task
    query = "SELECT id FROM task WHERE project_id = ?;"
    cursor.execute(query, (project_id,))

    deleted_task = 0
    for row in cursor.fetchall():
        task.delete_task(row[0], conn)
        deleted_task += 1

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

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

    if deleted_task:
        log_message = "{} with {} task{}".format(
            project_name, deleted_task, "s" if deleted_task > 1 else ""
        )
    else:
        log_message = project_name

    print("deleted project {}: {}".format(project_id, log_message))
    record_action(cursor, TypeAction.DELETE, log_message, project_id)


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: %s", 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: %s", row)
        task_id, username, name, status, priority, date, time, nb_note = row
        message = date + time + name
        print(
            "   {} {:d}: ({}) [{}] [{}] {} ({} notes)".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?


def get_project_name(project_id, conn):
    query = "SELECT name FROM project WHERE id = ?"

    cursor = conn.cursor()
    cursor.execute(query, (project_id,))
    return cursor.fetchone()[0]