from odoo import api, fields, models

class CourseHomeworkSubmit(models.Model):
    _name = 'course.homework.submit'
    _description = '作业提交记录'
    _rec_name = 'display_name'
    _inherit = ['mail.thread']
    _order = 'homework_id, student_id'

    display_name = fields.Char(string='显示名称', compute='_compute_display_name', store=True)
    student_id = fields.Many2one('student.info', string='学生', required=True)
    homework_id = fields.Many2one('course.homework', string='作业', required=True, ondelete='cascade')
    @api.depends('homework_id.name', 'student_id.stu_name')
    def _compute_display_name(self):
        for record in self:
            record.display_name = f"{record.student_id.stu_name} - {record.homework_id.name}"

    course_name = fields.Char(related="homework_id.course_id.name", string="课程名称", readonly=True)
    course_code = fields.Char(related="homework_id.course_id.code", string="课程代码", readonly=True)
    course_credit = fields.Float(related="homework_id.course_id.credit", string="学分", readonly=True)

    homework_name = fields.Char(related="homework_id.name", string="作业名称", readonly=True)
    homework_total_score = fields.Float(related="homework_id.total_score", string="作业总分", readonly=True)
    homework_deadline = fields.Datetime(related="homework_id.deadline", string="截止时间", readonly=True)
    homework_late_deadline = fields.Datetime(related="homework_id.late_deadline", string="补交截止时间", readonly=True)

    student_name = fields.Char(related="student_id.stu_name", string="姓名", readonly=True)
    student_no = fields.Char(related="student_id.stu_num", string="学号", readonly=True)
    student_class_id = fields.Many2one(related="student_id.class_id", string="班级", readonly=True)
    student_major_id = fields.Many2one(related="student_id.major_id", string="专业", readonly=True)
    student_phone = fields.Char(related="student_id.stu_phone", string="手机号", readonly=True)
    submit_file = fields.Binary(string='提交文件', attachment=True)
    submit_filename = fields.Char(string='文件名')
    submit_content = fields.Html(string='提交内容')
    submit_time = fields.Datetime(string='提交时间')
    score = fields.Float(string='得分')
    comment = fields.Html(string='批改评语')
    grader_id = fields.Many2one('res.users', string='批改人')
    grade_time = fields.Datetime(string='批改时间')
    state = fields.Selection([
        ('submitted', '已提交'),
        ('graded', '已批改'),
    ], string='状态', default='submitted')
    is_late = fields.Boolean(string='是否逾期', compute='_compute_is_late')


    def _compute_is_late(self):
        for record in self:
            deadline = record.homework_id.deadline
            if deadline and record.submit_time:
                record.is_late = record.submit_time > deadline
            else:
                record.is_late = False

    def action_grade(self):
        self.state = 'graded'
        self.grade_time = fields.Datetime.now()

    def action_regrade(self):
        self.state = 'submitted'
        self.grade_time = False

    # 在 CourseHomeworkSubmit 类中添加
    grade_level = fields.Selection([
        ('A', '优秀(A)'),
        ('B', '良好(B)'),
        ('C', '中等(C)'),
        ('D', '及格(D)'),
        ('F', '不及格(F)'),
    ], string='等级', compute='_compute_grade_level', store=True)

    @api.depends('score', 'homework_id.total_score')
    def _compute_grade_level(self):
        for record in self:
            if record.score and record.homework_id.total_score:
                percent = record.score / record.homework_id.total_score * 100
                if percent >= 90:
                    record.grade_level = 'A'
                elif percent >= 80:
                    record.grade_level = 'B'
                elif percent >= 70:
                    record.grade_level = 'C'
                elif percent >= 60:
                    record.grade_level = 'D'
                else:
                    record.grade_level = 'F'
            else:
                record.grade_level = False

# class CourseHomeworkSubmitBatchGrade(models.TransientModel):
#     _name = 'course.homework.submit.batch.grade'
#     _description = '作业批量批改向导'
#
#     homework_id = fields.Many2one('course.homework', string='作业')
#     total_count = fields.Integer(string='待批改总数')
#     score = fields.Float(string='统一分数')
#     comment = fields.Text(string='统一评语')
#
#     # 批量批改执行方法
#     def action_batch_grade(self):
#         # 自行补充批量更新分数、评语、状态的业务逻辑
#         return {'type': 'ir.actions.act_window_close'}