from odoo import api, fields, models


class StudentOrganization(models.Model):
    _name = 'student.organization'
    _description = '学生架构'
    _rec_name = 'full_name'
    _order = 'parent_id, sequence, id'
    _parent_store = True

    _parent_order = 'sequence, name'

    # 基本信息
    name = fields.Char(string='名称', required=True, translate=True)
    code = fields.Char(string='代码')
    sequence = fields.Integer(string='序号', default=10)

    org_type = fields.Selection([
        ('college', '学院'),
        ('major', '专业'),
        ('class', '班级'),  #用法  domain="[('org_type', '=', 'class')]"
    ], string='类型', required=True)

    # 层级关系
    parent_id = fields.Many2one('student.organization', string='上级组织', ondelete='cascade')
    child_ids = fields.One2many('student.organization', 'parent_id', string='下级组织')
    parent_path = fields.Char(index=True)

    # 完整名称（显示层级）
    full_name = fields.Char(string='完整名称', compute='_compute_full_name', store=True)

    # 负责人信息（学院用）
    manager_id = fields.Many2one('res.users', string='负责人')

    # 联系方式（学院用）
    phone = fields.Char(string='电话')
    mobile = fields.Char(string='手机')
    email = fields.Char(string='邮箱')
    address = fields.Text(string='办公地址')

    # 专业专用字段
    duration = fields.Integer(string='修业年限(年)', default=4)
    degree = fields.Selection([
        ('bachelor', '学士'),
        ('master', '硕士'),
        ('doctor', '博士'),
    ], string='学位')

    # 班级专用字段
    grade = fields.Char(string='年级')

    homeroom_teacher = fields.Many2one('hr.employee', string='导员')

    # 统计字段
    student_count = fields.Integer(string='学生数', compute='_compute_student_count')

    @api.depends('parent_id.full_name', 'name')
    def _compute_full_name(self):
        for record in self:
            if record.parent_id:
                record.full_name = f'{record.parent_id.full_name} / {record.name}'
            else:
                record.full_name = record.name

    def _compute_student_count(self):
        for record in self:
            if record.org_type == 'class':
                # 班级的学生数
                record.student_count = self.env['student.info'].search_count([('class_id', '=', record.id)])
            else:
                # 学院/专业的学生数（统计下级）
                students = self.env['student.info'].search([
                    ('org_path', 'like', f'{record.parent_path}%')
                ]) if record.parent_path else self.env['student.info'].search([])
                record.student_count = len(students)