from odoo import api,models,fields
from odoo.exceptions import ValidationError


class StudentInfo(models.Model):
    _name="student.info"

    stu_name=fields.Char(string="姓名",tracking=True)
    stu_num=fields.Char(string="学号",tracking=True)
    stu_sex = fields.Selection([('male', '男'),('female', '女')], string="性别", default='male', required=True)
    stu_birthday = fields.Date(string="出生日期", tracking=True)
    stu_id_card = fields.Char(string="身份证号", index=True, tracking=True)
    stu_nation = fields.Char(string="民族", default="汉族")
    stu_shenfen = fields.Selection([
        ('mass', '群众'),
        ('league', '共青团员'),
        ('party', '中共党员'),
        ('other', '其他')
    ], string="政治面貌", default='mass')
    stu_phone = fields.Char(string="手机号")
    stu_email = fields.Char(string="邮箱")
    stu_address = fields.Text(string="家庭地址")
    stu_emergency_contact = fields.Char(string="紧急联系人")
    stu_emergency_phone = fields.Char(string="紧急联系电话")
    stu_photo = fields.Binary(string="照片", attachment=True)
    stu_begin_date = fields.Date(string="入学日期", required=True, tracking=True)
    stu_end_date = fields.Date(string="毕业日期")
    stu_grade_xx = fields.Many2one('basic.grade.xx',string="年级", tracking=True,domain = lambda self: self.env['basic.grade.xx']._get_current_year_range_domain())
    stu_grade_bx=fields.Many2one('basic.grade.xx',string='年级',readonly=1)
    stu_status = fields.Selection([
        ('studying', '在读'),
        ('graduated', '已毕业'),
        ('suspended', '休学'),
        ('expelled', '退学'),
        ('transferred', '转出')
    ], string="学籍状态", default='studying', tracking=True)
    org_path = fields.Char(string='组织路径', compute='_compute_org_path',
                           store=True, index=True)

    class_id = fields.Many2one('student.organization', string="行政班", tracking=True,domain="[('org_type', '=', 'class')]")
    parent_path = fields.Char(related='class_id.parent_path',store=True)
    class_name = fields.Char(string="班级名称", related='class_id.name', store=True)
    major_id = fields.Many2one('student.organization', string="专业", tracking=True,domain="[('org_type', '=', 'major')]")
    major_name = fields.Char(string="专业名称", related='major_id.name', store=True)
    department_id = fields.Many2one('student.organization', string="院系",store=True,domain="[('org_type', '=', 'college')]")

    # 新增：关联系统登录用户（解决之前作业通知报错缺少user_id的问题）
    user_id = fields.Many2one('res.users', string="系统登录账号", ondelete='restrict')

    @api.depends('parent_path')
    def _compute_org_path(self):
        for record in self:
            if record.class_id:
                record.org_path = f"{record.class_id.parent_path}{record.class_id.id}/"
            else:
                record.org_path = False

    @api.model
    def create(self, vals):
        # 1. 先校验学号，提前取出学号避免多次读取
        stu_num = vals.get('stu_num', '').strip()
        new_user = None

        # 2. 学号不为空才执行创建用户逻辑
        if stu_num:
            # 校验学号对应的登录账号是否已存在
            exist_user = self.env['res.users'].search([('login', '=', stu_num)], limit=1)
            if not exist_user:
                # 获取两个权限组，并双重校验存在性
                internal_group = self.env.ref('base.group_user', raise_if_not_found=False)
                student_group = self.env.ref('edu_base.group_student', raise_if_not_found=False)

                if not internal_group:
                    raise ValidationError("系统内置内部用户组 base.group_user 缺失，无法创建登录账号！")
                if not student_group:
                    raise ValidationError("权限组 edu_base.group_student 不存在，请先创建该学生权限组！")

                # 组装用户参数，优先取学生填写的邮箱，无则自动生成
                stu_email = vals.get('stu_email')
                if not stu_email:
                    stu_email = f"{stu_num}@edu.local"

                user_vals = {
                    'name': vals.get('stu_name', ''),
                    'login': stu_num,
                    'password': stu_num,
                    'email': stu_email,
                    'phone': vals.get('stu_phone', ''),
                    # 同时分配后台登录组 + 学生业务权限组
                    'groups_id': [(6, 0, [student_group.id, internal_group.id])],
                }
                # 先创建用户，事务内失败会整体回滚
                new_user = self.env['res.users'].create(user_vals)

        # 3. 创建学生档案，如果已生成用户则绑定user_id
        if new_user:
            vals['user_id'] = new_user.id
        student_info = super().create(vals)

        return student_info