from odoo import api, fields, models


class McApplicant(models.Model):
    _name = "mc.applicant"
    _inherit = ["mail.thread"]
    _description = "Applicant"
    _order = "create_date desc"
    _rec_name = "name"

    name = fields.Char(string="Applicant Name", required=True, tracking=True)
    dob = fields.Date(string="Date of Birth")
    program_id = fields.Many2one(
        "mc.program", string="Grade Applied For", required=True, tracking=True,
    )
    guardian_name = fields.Char(string="Guardian Name", required=True)
    guardian_relationship = fields.Selection(
        [
            ("father", "Father"),
            ("mother", "Mother"),
            ("legal_guardian", "Legal Guardian"),
            ("other", "Other"),
        ],
        string="Guardian Relationship", default="legal_guardian",
    )
    guardian_phone = fields.Char(string="Guardian Phone")
    guardian_email = fields.Char(string="Guardian Email", required=True)

    application_no = fields.Char(string="Application No.", copy=False, tracking=True)
    state = fields.Selection(
        [
            ("applied", "Applied"),
            ("document_verification", "Document Verification"),
            ("interview", "Interview"),
            ("offered", "Offered"),
            ("accepted", "Accepted"),
            ("enrolled", "Enrolled"),
            ("rejected", "Rejected"),
        ],
        string="Stage", default="applied", required=True, tracking=True, group_expand="_read_group_state",
    )
    student_id = fields.Many2one(
        "mc.student", string="Student", readonly=True, copy=False,
        help="Set once this applicant has been converted. The application number persists onto the student record.",
    )
    company_id = fields.Many2one(
        "res.company", string="Company", required=True,
        default=lambda self: self.env.company,
    )

    _application_no_uniq = models.Constraint(
        "unique(application_no)",
        "An applicant with this application number already exists.",
    )

    @api.model
    def _read_group_state(self, states, domain):
        # Keeps every kanban column visible even when empty, so the pipeline
        # always reads as a pipeline rather than losing stages that have
        # nothing in them right now.
        return [key for key, _label in self._fields["state"].selection]

    @api.model_create_multi
    def create(self, vals_list):
        for vals in vals_list:
            if not vals.get("application_no"):
                vals["application_no"] = self.env["ir.sequence"].next_by_code(
                    "mc.applicant.application_no"
                )
        return super().create(vals_list)

    def action_set_document_verification(self):
        self.write({"state": "document_verification"})

    def action_set_interview(self):
        self.write({"state": "interview"})

    def action_set_offered(self):
        self.write({"state": "offered"})

    def action_set_accepted(self):
        self.write({"state": "accepted"})

    def action_reject(self):
        self.write({"state": "rejected"})

    def action_open_convert_wizard(self):
        self.ensure_one()
        return {
            "type": "ir.actions.act_window",
            "res_model": "mc.applicant.convert.wizard",
            "view_mode": "form",
            "target": "new",
            "context": {
                "default_applicant_id": self.id,
                "default_program_id": self.program_id.id,
            },
        }