from flask import g
from flask import jsonify
from flask import request

from app import alias_utils
from app.api.base import api_bp, require_api_auth
from app.api.serializer import (
    AliasInfo,
    serialize_alias_info,
    serialize_contact,
    get_alias_infos_with_pagination,
    get_alias_contacts,
    serialize_alias_info_v2,
    get_alias_info_v2,
    get_alias_infos_with_pagination_v3,
)
from app.config import EMAIL_DOMAIN
from app.dashboard.views.alias_log import get_alias_log
from app.email_utils import parseaddr_unicode, is_valid_email
from app.extensions import db
from app.log import LOG
from app.models import Alias, Contact, Mailbox, AliasMailbox
from app.utils import random_string


@api_bp.route("/aliases", methods=["GET", "POST"])
@require_api_auth
def get_aliases():
    """
    Get aliases
    Input:
        page_id: in query
    Output:
        - aliases: list of alias:
            - id
            - email
            - creation_date
            - creation_timestamp
            - nb_forward
            - nb_block
            - nb_reply
            - note

    """
    user = g.user
    try:
        page_id = int(request.args.get("page_id"))
    except (ValueError, TypeError):
        return jsonify(error="page_id must be provided in request query"), 400

    query = None
    data = request.get_json(silent=True)
    if data:
        query = data.get("query")

    alias_infos: [AliasInfo] = get_alias_infos_with_pagination(
        user, page_id=page_id, query=query
    )

    return (
        jsonify(
            aliases=[serialize_alias_info(alias_info) for alias_info in alias_infos]
        ),
        200,
    )


@api_bp.route("/v2/aliases", methods=["GET", "POST"])
@require_api_auth
def get_aliases_v2():
    """
    Get aliases
    Input:
        page_id: in query
    Output:
        - aliases: list of alias:
            - id
            - email
            - creation_date
            - creation_timestamp
            - nb_forward
            - nb_block
            - nb_reply
            - note
            - mailbox
            - mailboxes
            - support_pgp
            - disable_pgp
            - latest_activity: null if no activity.
                - timestamp
                - action: forward|reply|block|bounced
                - contact:
                    - email
                    - name
                    - reverse_alias


    """
    user = g.user
    try:
        page_id = int(request.args.get("page_id"))
    except (ValueError, TypeError):
        return jsonify(error="page_id must be provided in request query"), 400

    query = None
    data = request.get_json(silent=True)
    if data:
        query = data.get("query")

    alias_infos: [AliasInfo] = get_alias_infos_with_pagination_v3(
        user, page_id=page_id, query=query
    )

    return (
        jsonify(
            aliases=[serialize_alias_info_v2(alias_info) for alias_info in alias_infos]
        ),
        200,
    )


@api_bp.route("/aliases/<int:alias_id>", methods=["DELETE"])
@require_api_auth
def delete_alias(alias_id):
    """
    Delete alias
    Input:
        alias_id: in url
    Output:
        200 if deleted successfully

    """
    user = g.user
    alias = Alias.get(alias_id)

    if not alias or alias.user_id != user.id:
        return jsonify(error="Forbidden"), 403

    alias_utils.delete_alias(alias, user)

    return jsonify(deleted=True), 200


@api_bp.route("/aliases/<int:alias_id>/toggle", methods=["POST"])
@require_api_auth
def toggle_alias(alias_id):
    """
    Enable/disable alias
    Input:
        alias_id: in url
    Output:
        200 along with new status:
        - enabled


    """
    user = g.user
    alias: Alias = Alias.get(alias_id)

    if not alias or alias.user_id != user.id:
        return jsonify(error="Forbidden"), 403

    alias.enabled = not alias.enabled
    db.session.commit()

    return jsonify(enabled=alias.enabled), 200


@api_bp.route("/aliases/<int:alias_id>/activities")
@require_api_auth
def get_alias_activities(alias_id):
    """
    Get aliases
    Input:
        page_id: in query
    Output:
        - activities: list of activity:
            - from
            - to
            - timestamp
            - action: forward|reply|block|bounced
            - reverse_alias

    """
    user = g.user
    try:
        page_id = int(request.args.get("page_id"))
    except (ValueError, TypeError):
        return jsonify(error="page_id must be provided in request query"), 400

    alias: Alias = Alias.get(alias_id)

    if not alias or alias.user_id != user.id:
        return jsonify(error="Forbidden"), 403

    alias_logs = get_alias_log(alias, page_id)

    activities = []
    for alias_log in alias_logs:
        activity = {
            "timestamp": alias_log.when.timestamp,
            "reverse_alias": alias_log.reverse_alias,
        }
        if alias_log.is_reply:
            activity["from"] = alias_log.alias
            activity["to"] = alias_log.website_email
            activity["action"] = "reply"
        else:
            activity["to"] = alias_log.alias
            activity["from"] = alias_log.website_email

            if alias_log.bounced:
                activity["action"] = "bounced"
            elif alias_log.blocked:
                activity["action"] = "block"
            else:
                activity["action"] = "forward"

        activities.append(activity)

    return jsonify(activities=activities), 200


@api_bp.route("/aliases/<int:alias_id>", methods=["PUT", "PATCH"])
@require_api_auth
def update_alias(alias_id):
    """
    Update alias note
    Input:
        alias_id: in url
        note (optional): in body
        name (optional): in body
        mailbox_id (optional): in body
        disable_pgp (optional): in body
    Output:
        200
    """
    data = request.get_json()
    if not data:
        return jsonify(error="request body cannot be empty"), 400

    user = g.user
    alias: Alias = Alias.get(alias_id)

    if not alias or alias.user_id != user.id:
        return jsonify(error="Forbidden"), 403

    changed = False
    if "note" in data:
        new_note = data.get("note")
        alias.note = new_note
        changed = True

    if "mailbox_id" in data:
        mailbox_id = int(data.get("mailbox_id"))
        mailbox = Mailbox.get(mailbox_id)
        if not mailbox or mailbox.user_id != user.id or not mailbox.verified:
            return jsonify(error="Forbidden"), 400

        alias.mailbox_id = mailbox_id
        changed = True

    if "mailbox_ids" in data:
        mailbox_ids = [int(m_id) for m_id in data.get("mailbox_ids")]
        mailboxes: [Mailbox] = []

        # check if all mailboxes belong to user
        for mailbox_id in mailbox_ids:
            mailbox = Mailbox.get(mailbox_id)
            if not mailbox or mailbox.user_id != user.id or not mailbox.verified:
                return jsonify(error="Forbidden"), 400
            mailboxes.append(mailbox)

        if not mailboxes:
            return jsonify(error="Must choose at least one mailbox"), 400

        # <<< update alias mailboxes >>>
        # first remove all existing alias-mailboxes links
        AliasMailbox.query.filter_by(alias_id=alias.id).delete()
        db.session.flush()

        # then add all new mailboxes
        for i, mailbox in enumerate(mailboxes):
            if i == 0:
                alias.mailbox_id = mailboxes[0].id
            else:
                AliasMailbox.create(alias_id=alias.id, mailbox_id=mailbox.id)
        # <<< END update alias mailboxes >>>

        changed = True

    if "name" in data:
        new_name = data.get("name")
        alias.name = new_name
        changed = True

    if "disable_pgp" in data:
        alias.disable_pgp = data.get("disable_pgp")
        changed = True

    if "pinned" in data:
        alias.pinned = data.get("pinned")
        changed = True

    if changed:
        db.session.commit()

    return jsonify(ok=True), 200


@api_bp.route("/aliases/<int:alias_id>", methods=["GET"])
@require_api_auth
def get_alias(alias_id):
    """
    Get alias
    Input:
        alias_id: in url
    Output:
        Alias info, same as in get_aliases

    """
    user = g.user
    alias: Alias = Alias.get(alias_id)

    if not alias:
        return jsonify(error="Unknown error"), 400

    if alias.user_id != user.id:
        return jsonify(error="Forbidden"), 403

    return jsonify(**serialize_alias_info_v2(get_alias_info_v2(alias))), 200


@api_bp.route("/aliases/<int:alias_id>/contacts")
@require_api_auth
def get_alias_contacts_route(alias_id):
    """
    Get alias contacts
    Input:
        page_id: in query
    Output:
        - contacts: list of contacts:
            - creation_date
            - creation_timestamp
            - last_email_sent_date
            - last_email_sent_timestamp
            - contact
            - reverse_alias

    """
    user = g.user
    try:
        page_id = int(request.args.get("page_id"))
    except (ValueError, TypeError):
        return jsonify(error="page_id must be provided in request query"), 400

    alias: Alias = Alias.get(alias_id)

    if alias.user_id != user.id:
        return jsonify(error="Forbidden"), 403

    contacts = get_alias_contacts(alias, page_id)

    return jsonify(contacts=contacts), 200


@api_bp.route("/aliases/<int:alias_id>/contacts", methods=["POST"])
@require_api_auth
def create_contact_route(alias_id):
    """
    Create contact for an alias
    Input:
        alias_id: in url
        contact: in body
    Output:
        201 if success
        409 if contact already added


    """
    data = request.get_json()
    if not data:
        return jsonify(error="request body cannot be empty"), 400

    user = g.user
    alias: Alias = Alias.get(alias_id)

    if alias.user_id != user.id:
        return jsonify(error="Forbidden"), 403

    contact_addr = data.get("contact")

    if not contact_addr:
        return jsonify(error="Contact cannot be empty"), 400

    # generate a reply_email, make sure it is unique
    # not use while to avoid infinite loop
    reply_email = f"ra+{random_string(25)}@{EMAIL_DOMAIN}"
    for _ in range(1000):
        reply_email = f"ra+{random_string(25)}@{EMAIL_DOMAIN}"
        if not Contact.get_by(reply_email=reply_email):
            break

    contact_name, contact_email = parseaddr_unicode(contact_addr)
    if not is_valid_email(contact_email):
        return jsonify(error=f"invalid contact email {contact_email}"), 400

    # already been added
    if Contact.get_by(alias_id=alias.id, website_email=contact_email):
        return jsonify(error="Contact already added"), 409

    contact = Contact.create(
        user_id=alias.user_id,
        alias_id=alias.id,
        website_email=contact_email,
        name=contact_name,
        reply_email=reply_email,
    )

    LOG.d("create reverse-alias for %s %s", contact_addr, alias)
    db.session.commit()

    return jsonify(**serialize_contact(contact)), 201


@api_bp.route("/contacts/<int:contact_id>", methods=["DELETE"])
@require_api_auth
def delete_contact(contact_id):
    """
    Delete contact
    Input:
        contact_id: in url
    Output:
        200
    """
    user = g.user
    contact = Contact.get(contact_id)

    if not contact or contact.alias.user_id != user.id:
        return jsonify(error="Forbidden"), 403

    Contact.delete(contact_id)
    db.session.commit()

    return jsonify(deleted=True), 200