from flask import (
    render_template,
    flash,
    redirect,
    url_for,
)
from flask_login import login_required

from app.controllers import (
    register_book_verify_route,
)
from app import models as m, db, forms as f
from app.controllers.require_permission import require_permission
from app.logger import log
from .bp import bp


@bp.route("/<int:book_id>/settings", methods=["GET"])
@register_book_verify_route(bp.name)
@require_permission(
    entity_type=m.Permission.Entity.BOOK,
    access=[m.Permission.Access.U],
    entities=[m.Book],
)
@login_required
def settings(book_id: int):
    book: m.Book = db.session.get(m.Book, book_id)

    return render_template(
        "book/settings.html", book=book, roles=m.BookContributor.Roles
    )


@bp.route("/<int:book_id>/add_contributor", methods=["POST"])
@register_book_verify_route(bp.name)
@require_permission(
    entity_type=m.Permission.Entity.BOOK,
    access=[m.Permission.Access.U],
    entities=[m.Book],
)
@login_required
def add_contributor(book_id: int):
    form = f.AddContributorForm()

    if form.validate_on_submit():
        user_id = form.user_id.data
        book_contributor = m.BookContributor.query.filter_by(
            user_id=user_id, book_id=book_id
        ).first()
        if book_contributor:
            log(log.INFO, "Contributor: [%s] already exists", book_contributor)
            flash("Already exists!", "danger")
            return redirect(url_for("book.settings", book_id=book_id))

        role = m.BookContributor.Roles(int(form.role.data))
        contributor = m.BookContributor(user_id=user_id, book_id=book_id, role=role)
        log(log.INFO, "New contributor [%s]", contributor)
        contributor.save()

        groups = (
            db.session.query(m.AccessGroup)
            .filter(
                m.BookAccessGroups.book_id == book_id,
                m.AccessGroup.id == m.BookAccessGroups.access_group_id,
                m.AccessGroup.name == role.name.lower(),
            )
            .all()
        )
        for group in groups:
            m.UserAccessGroups(user_id=user_id, access_group_id=group.id).save()

        flash("Contributor was added!", "success")
        return redirect(url_for("book.settings", book_id=book_id))
    else:
        log(log.ERROR, "Book create errors: [%s]", form.errors)
        for field, errors in form.errors.items():
            field_label = form._fields[field].label.text
            for error in errors:
                flash(error.replace("Field", field_label), "danger")
        return redirect(url_for("book.settings", book_id=book_id))


@bp.route("/<int:book_id>/delete_contributor", methods=["POST"])
@register_book_verify_route(bp.name)
@require_permission(
    entity_type=m.Permission.Entity.BOOK,
    access=[m.Permission.Access.U],
    entities=[m.Book],
)
@login_required
def delete_contributor(book_id: int):
    form = f.DeleteContributorForm()

    if form.validate_on_submit():
        user_id = int(form.user_id.data)
        book_contributor = m.BookContributor.query.filter_by(
            user_id=user_id, book_id=book_id
        ).first()
        if not book_contributor:
            log(
                log.INFO,
                "BookContributor does not exists user: [%s], book: [%s]",
                user_id,
                book_id,
            )
            flash("Does not exists!", "success")
            return redirect(url_for("book.settings", book_id=book_id))

        book: m.Book = db.session.get(m.Book, book_id)
        user: m.User = db.session.get(m.User, user_id)
        for access_group in book.access_groups:
            access_group: m.AccessGroup
            if user in access_group.users:
                log(
                    log.INFO,
                    "Delete user [%s] from AccessGroup [%s]",
                    user,
                    access_group,
                )
                relationships_to_delete = m.UserAccessGroups.query.filter_by(
                    user_id=user_id, access_group_id=access_group.id
                ).all()
                for relationship in relationships_to_delete:
                    db.session.delete(relationship)

        log(log.INFO, "Delete BookContributor [%s]", book_contributor)
        db.session.delete(book_contributor)
        db.session.commit()

        flash("Success!", "success")
        return redirect(url_for("book.settings", book_id=book_id))
    else:
        log(log.ERROR, "Book create errors: [%s]", form.errors)
        for field, errors in form.errors.items():
            field_label = form._fields[field].label.text
            for error in errors:
                flash(error.replace("Field", field_label), "danger")
        return redirect(url_for("book.settings", book_id=book_id))


@bp.route("/<int:book_id>/edit_contributor_role", methods=["POST"])
@register_book_verify_route(bp.name)
@require_permission(
    entity_type=m.Permission.Entity.BOOK,
    access=[m.Permission.Access.U],
    entities=[m.Book],
)
@login_required
def edit_contributor_role(book_id: int):
    form = f.EditContributorRoleForm()

    if form.validate_on_submit():
        book_contributor = m.BookContributor.query.filter_by(
            user_id=int(form.user_id.data), book_id=book_id
        ).first()
        if not book_contributor:
            log(
                log.INFO,
                "BookContributor does not exists user: [%s], book: [%s]",
                form.user_id.data,
                book_id,
            )
            flash("Does not exists!", "success")
            return redirect(url_for("book.settings", book_id=book_id))

        role = m.BookContributor.Roles(int(form.role.data))
        book_contributor.role = role

        log(
            log.INFO,
            "Update contributor [%s] role: new role: [%s]",
            book_contributor,
            role,
        )
        book_contributor.save()

        flash("Success!", "success")
        return redirect(url_for("book.settings", book_id=book_id))
    else:
        log(log.ERROR, "Book create errors: [%s]", form.errors)
        for field, errors in form.errors.items():
            field_label = form._fields[field].label.text
            for error in errors:
                flash(error.replace("Field", field_label), "danger")
        return redirect(url_for("book.settings", book_id=book_id))