"""PASSIVE + PV_SURPLUS: 108=0 (nepoužívat baterii), 109=max; 142 zůstává zero-export (1/2)."""

from __future__ import annotations

import unittest

from services.control.setpoints import deye_battery_charge_discharge_amps


class PassivePvSurplusChargeAmpsTests(unittest.TestCase):
    def test_pv_surplus_export_zeros_charge_amps(self) -> None:
        ch, dis = deye_battery_charge_discharge_amps(
            lock_battery=False,
            deye_mode="PASSIVE",
            self_sustain_local_use=False,
            bat_w=-177,
            grid_w=-2851,
            max_charge_a=100,
            max_discharge_a=90,
            export_mode="PV_SURPLUS",
            export_ban=False,
        )
        self.assertEqual(ch, 0)
        self.assertEqual(dis, 90)

    def test_pv_surplus_even_if_lp_shows_positive_battery_w(self) -> None:
        """Plán může mít kladný battery_w; exportní záměr je PV_SURPLUS → 108=0."""
        ch, dis = deye_battery_charge_discharge_amps(
            lock_battery=False,
            deye_mode="PASSIVE",
            self_sustain_local_use=False,
            bat_w=5000,
            grid_w=-2000,
            max_charge_a=100,
            max_discharge_a=100,
            export_mode="PV_SURPLUS",
            export_ban=False,
        )
        self.assertEqual(ch, 0)
        self.assertEqual(dis, 100)

    def test_passive_charge_without_export_mode_uses_max_108(self) -> None:
        ch, dis = deye_battery_charge_discharge_amps(
            lock_battery=False,
            deye_mode="PASSIVE",
            self_sustain_local_use=False,
            bat_w=5000,
            grid_w=0,
            max_charge_a=100,
            max_discharge_a=100,
            export_mode="NONE",
            export_ban=False,
        )
        self.assertEqual(ch, 100)
        self.assertEqual(dis, 100)

    def test_legacy_negative_grid_infers_pv_surplus(self) -> None:
        ch, dis = deye_battery_charge_discharge_amps(
            lock_battery=False,
            deye_mode="PASSIVE",
            self_sustain_local_use=False,
            bat_w=0,
            grid_w=-2000,
            max_charge_a=100,
            max_discharge_a=100,
            export_mode=None,
            export_ban=False,
        )
        self.assertEqual(ch, 0)
        self.assertEqual(dis, 100)

    def test_charge_mode_still_scales_108_from_battery_w(self) -> None:
        ch, dis = deye_battery_charge_discharge_amps(
            lock_battery=False,
            deye_mode="CHARGE",
            self_sustain_local_use=False,
            bat_w=2000,
            grid_w=3000,
            max_charge_a=100,
            max_discharge_a=100,
        )
        self.assertLess(ch, 100)
        self.assertGreater(ch, 0)
        self.assertEqual(dis, 0)

    def test_sell_skips_charge_amp_write(self) -> None:
        ch, dis = deye_battery_charge_discharge_amps(
            lock_battery=False,
            deye_mode="SELL",
            self_sustain_local_use=False,
            bat_w=-3000,
            grid_w=-2000,
            max_charge_a=100,
            max_discharge_a=80,
        )
        self.assertIsNone(ch)
        self.assertEqual(dis, 80)


if __name__ == "__main__":
    unittest.main()