"""
后台导航管理视图（需要登录 + 权限码 system:nav:*）

提供 Nav 模型的 CRUD 接口，供后台管理员维护前台公开导航。
"""
from flask import Blueprint, render_template, request
from flask_login import current_user

from applications.common.utils.http import table_api, fail_api, success_api
from applications.common.utils.rights import authorize
from applications.common.utils.validate import str_escape
from applications.extensions import db
from applications.extensions.init_limit import limiter
from applications.models import Nav
from applications.schemas import NavManageSchema

bp = Blueprint('nav', __name__, url_prefix='/nav')


@bp.get('/')
@authorize("system:nav:main")
def main():
    """导航管理主页"""
    return render_template('system/nav/main.html')


@bp.get('/data')
@limiter.limit("60 per minute")
@authorize("system:nav:main")
def data():
    """表格数据接口"""
    keyword = str_escape(request.args.get('keyword', type=str))
    category = str_escape(request.args.get('category', type=str))

    query = Nav.query
    if keyword:
        query = query.filter(
            db.or_(
                Nav.title.contains(keyword),
                Nav.url.contains(keyword),
                Nav.description.contains(keyword),
            )
        )
    if category:
        query = query.filter(Nav.category == category)

    items = query.order_by(Nav.category.asc(), Nav.sort.asc(), Nav.id.asc()).all()
    data = NavManageSchema(many=True).dump(items)
    return table_api(msg="请求成功", data=data, count=len(data))


@bp.get('/add')
@authorize("system:nav:add", log=True)
def add():
    return render_template('system/nav/add.html')


@bp.post('/save')
@authorize("system:nav:add", log=True)
def save():
    req = request.get_json(force=True)
    try:
        nav = Nav(
            category=str_escape(req.get('category')),
            title=str_escape(req.get('title')),
            url=str_escape(req.get('url')),
            description=str_escape(req.get('description')),
            icon=str_escape(req.get('icon')) or 'layui-icon-link',
            sort=int(req.get('sort') or 0),
            status=int(req.get('status') or 1),
            is_external=int(req.get('isExternal') or 1),
            create_by=current_user.username if current_user.is_authenticated else 'admin',
        )
        db.session.add(nav)
        db.session.commit()
    except Exception as e:
        db.session.rollback()
        return fail_api(msg=f"新增失败：{e}")
    return success_api(msg="新增成功")


@bp.get('/edit')
@authorize("system:nav:edit", log=True)
def edit():
    nav_id = request.args.get("navId", type=int)
    nav = Nav.query.get(nav_id)
    if not nav:
        return fail_api(msg="导航不存在")
    return render_template('system/nav/edit.html', nav=nav)


@bp.put('/update')
@authorize("system:nav:edit", log=True)
def update():
    req = request.get_json(force=True)
    nav_id = req.get('id')
    nav = Nav.query.get(nav_id)
    if not nav:
        return fail_api(msg="导航不存在")
    try:
        nav.category = str_escape(req.get('category')) or nav.category
        nav.title = str_escape(req.get('title')) or nav.title
        nav.url = str_escape(req.get('url')) or nav.url
        nav.description = str_escape(req.get('description'))
        nav.icon = str_escape(req.get('icon')) or 'layui-icon-link'
        nav.sort = int(req.get('sort') or 0)
        nav.status = int(req.get('status') or 1)
        nav.is_external = int(req.get('isExternal') or 1)
        db.session.commit()
    except Exception as e:
        db.session.rollback()
        return fail_api(msg=f"更新失败：{e}")
    return success_api(msg="更新成功")


@bp.delete('/remove/<int:_id>')
@authorize("system:nav:remove", log=True)
def remove(_id):
    nav = Nav.query.get(_id)
    if not nav:
        return fail_api(msg="导航不存在")
    db.session.delete(nav)
    db.session.commit()
    return success_api(msg="删除成功")


@bp.put('/enable')
@authorize("system:nav:edit", log=True)
def enable():
    nav_id = request.get_json(force=True).get('navId')
    Nav.query.filter_by(id=nav_id).update({"status": 1})
    db.session.commit()
    return success_api(msg="已启用")


@bp.put('/disable')
@authorize("system:nav:edit", log=True)
def disable():
    nav_id = request.get_json(force=True).get('navId')
    Nav.query.filter_by(id=nav_id).update({"status": 0})
    db.session.commit()
    return success_api(msg="已禁用")