from odoo import models, fields, api
from odoo.exceptions import ValidationError
from datetime import date
from odoo import _
from odoo.exceptions import UserError


class EducationStudent(models.Model):
    _name = "education.student"

    _name = "education.student"
    _description = "Education Student"

    name = fields.Char(string="Name", required=True, translate=True)
    student_code = fields.Char(
        string="Student Code", required=True, index=True, help="Student ID is unique"
    )
    gender = fields.Selection(
        [("male", "Male"), ("female", "Female"), ("other", "Other")],
        string="Gender",
        default="male",
    )
    date_of_birth = fields.Date(
        string="Date of Birth",
    )
    age = fields.Integer(
        string="Age",
        compute="_compute_age",
        inverse="_inverse_age",
        search="_search_age",
        store=False,  # tùy chọn
        compute_sudo=True,
        readonly=True,
    )
    active = fields.Boolean(string="Active", default=True)
    notes = fields.Text(string="Internal Notes")
    description = fields.Html(string="Description", sanitize=True, strip_style=False)
    dropout_reason = fields.Text(string="Dropout Reason")
    attached_file = fields.Binary("Attached File", groups="base.group_user")
    total_score = fields.Float(string="Total Score", digits="Score")
    write_date = fields.Datetime(string="Last Updated on")
    currency_id = fields.Many2one("res.currency", string="Currency")
    amount_paid = fields.Monetary("Amount Paid", currency_field="currency_id")
    class_id = fields.Many2one("education.class", string="Class", ondelete="restrict")
    school_id = fields.Many2one("education.school", string="School")
    school_code = fields.Char(related="school_id.code", string="School Code")
    school_address = fields.Char(related="school_id.address", string="School Address")
    state = fields.Selection(
        string="Status",
        selection=[("new", "New"), ("studying", "Studying"), ("off", "Off")],
        default="new",
    )
    _sql_constraints = [
        (
            "student_code_unique",
            "unique(student_code)",
            "The student code must be unique!",
        ),
        (
            "check_total_score",
            "CHECK(total_score >= 0)",
            "The Total Score must be greater than 0!",
        ),
    ]

    @api.model
    def is_allowed_state(self, current_state, new_state):
        allowed_states = [
            ("new", "studying"),
            ("studying", "off"),
            ("off", "studying"),
            ("new", "off"),
        ]
        return (current_state, new_state) in allowed_states

    @api.depends("date_of_birth", "age")
    def _compute_age(self):
        curent_year = fields.Date.today().year
        for r in self:
            if r.date_of_birth:
                r.age = curent_year - r.date_of_birth.year + 1
            else:
                r.age = 0

    def get_student_has_class(self):
        return self.env["education.student"].search([("class_id", "!=", False)])

    @api.constrains("date_of_birth")
    def _check_date_of_birth(self):
        for r in self:
            if r.date_of_birth > fields.Date.today():
                raise ValidationError("Date of Birth must be in the past")

    def _inverse_age(self):
        for r in self:
            if r.age and r.date_of_birth:
                curent_year = fields.Date.today().year
                dob_year = curent_year - r.age
                dob_month = r.date_of_birth.month
                dob_day = r.date_of_birth.day
                date_of_birth = date(dob_year, dob_month, dob_day)
                r.date_of_birth = date_of_birth

    def _search_age(self, operator, value):
        new_year = fields.Date.today().year - value
        new_value = date(1, 1, new_year)
        # age > value => date_of_birth < new_value
        operator_map = {">": "<", ">=": "<=", "<": ">", "<=": ">="}
        new_operator = operator_map.get(operator, operator)
        return [("date_of_birth", new_operator, new_value)]

    def change_student_state(self, state):
        for student in self:
            if student.is_allowed_state(student.state, state):
                student.state = state
            else:
                raise UserError(
                    _("Changing student status from %s to %s is not allowed.")
                    % (student.state, state)
                )

    def change_to_new(self):
        self.change_student_state("new")

    def change_to_studying(self):
        self.change_student_state("studying")

    def change_to_off(self):
        self.change_student_state("off")

    def find_student(self):
        domain = ["|", ("name", "ilike", "John"), ("class_id.name", "=", "12A1")]
        students = self.search(domain)

    def action_dropout(self):
        return self.env.ref("education.education_student_dropout_wizard_action").read()[
            0
        ]