from odoo import models, fields, api

class EducationSubject(models.Model):
    _name = 'education.subject'
    _description = 'Education Subject'

    name = fields.Char(string='Name', required=True)
    code = fields.Char(string='Code', required=True)
    program_id = fields.Many2one('education.program', string='Program', required=True)
    academic_year_id = fields.Many2one('education.academic.year', string='Academic Year')
    term_id = fields.Many2one('education.academic.term', string='Semester/Term')
    credits = fields.Float(string='Credits', default=1.0)
    subject_type = fields.Selection([
        ('theory', 'Theory'),
        ('practical', 'Practical'),
        ('both', 'Theory + Practical')
    ], string='Subject Type', required=True, default='theory')
    active = fields.Boolean(default=True)

    _code_unique = models.Constraint(
        'unique(code)',
        'Subject code must be unique!'
    )