from odoo import fields, models, api


class ForumPost(models.Model):
    _name = 'yuthon.school.forum_post'
    _description = '学习交流'
    _order = 'create_date desc, id'

    name = fields.Char(
        string='主题',
        required=True,
        help='如：Many2many 的 (6,0,[ids]) 怎么理解？',
    )
    content = fields.Html(
        string='内容',
        sanitize=True,
    )
    author_name = fields.Char(
        string='作者',
        help='发帖人姓名（教学演示用，避免关联复杂权限）',
    )
    author_type = fields.Selection(
        [('student', '学生'), ('teacher', '老师')],
        string='作者类型',
        default='student',
    )
    course_id = fields.Many2one(
        'yuthon.school.course',
        string='关联课程',
        ondelete='restrict',
    )
    post_type = fields.Selection(
        [('question', '提问'), ('share', '分享'), ('discuss', '讨论')],
        string='类型',
        default='question',
    )
    like_count = fields.Integer(
        string='点赞数',
        default=0,
    )
    parent_id = fields.Many2one(
        'yuthon.school.forum_post',
        string='回复对象',
        ondelete='cascade',
        help='非空表示这是某帖的回复（实现楼中楼）',
    )
    reply_ids = fields.One2many(
        'yuthon.school.forum_post',
        'parent_id',
        string='回复',
    )
    reply_count = fields.Integer(
        string='回复数',
        compute='_compute_reply_count',
        store=True,
    )
    active = fields.Boolean(
        string='启用',
        default=True,
    )

    @api.depends('reply_ids')
    def _compute_reply_count(self):
        for record in self:
            record.reply_count = len(record.reply_ids)