# -*- coding: utf-8 -*-
from odoo import api, fields, models


class SaatTransaksi(models.Model):
    """Catat setiap pembelian / penjualan saham."""
    _name = 'saat.transaksi'
    _description = "Transaksi Jual/Beli Saham"
    _order = 'tanggal desc, id desc'

    TIPE = [('buy', 'Beli'), ('sell', 'Jual')]

    name = fields.Char(string="Referensi", compute='_compute_name', store=True)
    tanggal = fields.Date(string="Tanggal", required=True, default=fields.Date.context_today)
    tipe = fields.Selection(TIPE, string="Tipe", required=True, default='buy')
    saham_id = fields.Many2one('saat.saham', string="Saham", required=True, ondelete='restrict')
    volume = fields.Integer(string="Jumlah Lembar", required=True)
    harga = fields.Monetary(string="Harga/Lembar", currency_field='currency_id', required=True)
    fee = fields.Monetary(string="Biaya (Komisi/PPN)", currency_field='currency_id', default=0.0)
    total = fields.Monetary(
        string="Total Biaya", currency_field='currency_id',
        compute='_compute_total', store=True)
    catatan = fields.Text(string="Catatan")
    user_id = fields.Many2one('res.users', string="Pencatat", default=lambda self: self.env.user)
    currency_id = fields.Many2one(
        'res.currency', string="Mata Uang", default=lambda self: self._default_currency())

    @api.model
    def _default_currency(self):
        # IDR
        return self.env.ref('base.IDR', raise_if_not_found=False) or self.env.company.currency_id

    @api.depends('tanggal', 'tipe', 'saham_id')
    def _compute_name(self):
        for r in self:
            ticker = r.saham_id.name or ''
            tipe_label = dict(self.TIPE).get(r.tipe, '')
            r.name = f"{r.tanggal or ''} {tipe_label} {ticker}"

    @api.depends('volume', 'harga', 'fee', 'tipe')
    def _compute_total(self):
        for r in self:
            r.total = (r.volume or 0) * (r.harga or 0) + (r.fee or 0)

    @api.constrains('volume', 'harga')
    def _check_positive(self):
        for r in self:
            if r.volume <= 0:
                raise models.ValidationError("Volume harus lebih dari 0.")
            if r.harga < 0:
                raise models.ValidationError("Harga tidak boleh negatif.")

    # --- auto-sync portofolio: setiap transaksi berubah, portofolio diperbarui ---
    def _resync_portofolio(self):
        """Rekalkulasi portofolio dari seluruh transaksi (idempoten)."""
        self.env['saat.portofolio'].action_recalculate()

    @api.model_create_multi
    def create(self, vals_list):
        res = super().create(vals_list)
        res._resync_portofolio()
        return res

    def write(self, vals):
        res = super().write(vals)
        self._resync_portofolio()
        return res

    def unlink(self):
        res = super().unlink()
        self._resync_portofolio()
        return res