from urllib.parse import quote_plus

from flask import Markup, flash, redirect, render_template, request, url_for
from flask_babelex import gettext
from flask_mail import Message
from psycopg2.errorcodes import UNIQUE_VIOLATION
from sqlalchemy.exc import SQLAlchemyError

from project import app, db, mail
from project.dateutils import gmt_tz
from project.models import Analytics, EventAttendanceMode, EventDate
from project.utils import get_place_str


def track_analytics(key, value1, value2):
    result = Analytics(key=key, value1=value1)

    if value2 is not None:
        result.value2 = value2

    db.session.add(result)
    db.session.commit()

    return result


def handleSqlError(e: SQLAlchemyError) -> str:
    if not e.orig:
        return str(e)

    prefix = None
    message = str(e.orig)

    if e.orig.pgcode == UNIQUE_VIOLATION:
        prefix = gettext(
            "An entry with the entered values ​​already exists. Duplicate entries are not allowed."
        )

    if not prefix:
        return message

    return "%s (%s)" % (prefix, message)


def get_pagination_urls(pagination, **kwargs):
    result = {}

    if pagination:
        result["page"] = pagination.page
        result["pages"] = pagination.pages
        result["total"] = pagination.total

        if pagination.has_prev:
            args = request.args.copy()
            args.update(kwargs)
            args["page"] = pagination.prev_num
            result["prev_url"] = url_for(request.endpoint, **args)

        if pagination.has_next:
            args = request.args.copy()
            args.update(kwargs)
            args["page"] = pagination.next_num
            result["next_url"] = url_for(request.endpoint, **args)

    return result


def flash_errors(form):
    for field, errors in form.errors.items():
        for error in errors:
            flash(
                gettext("Error in the %s field - %s")
                % (getattr(form, field).label.text, error),
                "danger",
            )


def flash_message(msg, url, link_text=None, category="success"):
    if not link_text:
        link_text = gettext("Show")
    link = ' &ndash; <a href="%s">%s</a>' % (url, link_text)
    message = Markup(msg + link)
    flash(message, category)


def permission_missing(redirect_location):
    flash("You do not have permission for this action", "danger")
    return redirect(redirect_location)


def send_mail(recipient, subject, template, **context):
    send_mails([recipient], subject, template, **context)


def send_mails(recipients, subject, template, **context):
    msg = Message(subject)
    msg.recipients = recipients
    msg.body = render_template("email/%s.txt" % template, **context)
    msg.html = render_template("email/%s.html" % template, **context)

    if not mail.default_sender:
        app.logger.info(",".join(msg.recipients))
        app.logger.info(msg.subject)
        app.logger.info(msg.body)
        return

    mail.send(msg)


def non_match_for_deletion(str1: str, str2: str) -> bool:
    return str1 != str2 and str1.casefold() != str2.casefold()


def truncate(data: str, length: int) -> str:
    if not data:
        return data

    return (data[: length - 2] + "..") if len(data) > length else data


def get_share_links(url: str, title: str) -> dict:
    share_links = dict()
    encoded_url = quote_plus(url)
    encoded_title = quote_plus(title)

    share_links[
        "facebook"
    ] = f"https://www.facebook.com/sharer/sharer.php?u={encoded_url}"
    share_links[
        "twitter"
    ] = f"https://twitter.com/intent/tweet?url={encoded_url}&text={encoded_title}"
    share_links["email"] = f"mailto:?subject={encoded_title}&body={encoded_url}"
    share_links["whatsapp"] = f"whatsapp://send?text={encoded_url}"
    share_links["telegram"] = f"https://t.me/share/url?url={encoded_url}"
    share_links["url"] = url

    return share_links


def get_calendar_links(event_date: EventDate) -> dict:
    calendar_links = dict()

    url = url_for("event_date", id=event_date.id, _external=True)
    encoded_url = quote_plus(url)
    encoded_title = quote_plus(event_date.event.name)
    start = event_date.start.astimezone(gmt_tz).strftime("%Y%m%dT%H%M%SZ")
    if event_date.end:
        end = event_date.end.astimezone(gmt_tz).strftime("%Y%m%dT%H%M%SZ")
    else:
        end = start

    if (
        event_date.event.attendance_mode
        and event_date.event.attendance_mode != EventAttendanceMode.online
    ):
        location = get_place_str(event_date.event.event_place)
        locationParam = f"&location={quote_plus(location)}"
    else:
        locationParam = ""

    calendar_links[
        "google"
    ] = f"http://www.google.com/calendar/event?action=TEMPLATE&text={encoded_title}&dates={start}/{end}&details={encoded_url}{locationParam}"

    calendar_links["ics"] = url_for("event_date_ical", id=event_date.id, _external=True)

    return calendar_links