"""PASSIVE + PV_SURPLUS: reg 108 sleduje charge intent (fix 2026-06-16).

bat_w>0 (plán chce nabíjet z přebytku) → 108=max (baterka nabere co zvládne, zbytek ven);
SoC u maxima + přebytek → 108=max (BMS kalibrace na 100 %); jen "prodej PV a drž baterku"
daleko od maxima (bat_w<=0) → 108=0. 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_with_positive_battery_w_charges_at_max(self) -> None:
        """Fix 2026-06-16: plán chce nabíjet z přebytku (bat_w>0) → 108=max (ne 0).

        Baterka nabere kolik zvládne, přebytek nad nabíjecí rychlost jde do sítě (BA81).
        """
        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, 100)
        self.assertEqual(dis, 100)

    def test_pv_surplus_near_full_tops_off_for_calibration(self) -> None:
        """SoC u maxima (97 >= 100-3) + přebytek → 108=max i při bat_w<=0 (BMS kalibrace)."""
        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="PV_SURPLUS",
            export_ban=False,
            current_soc_pct=97.0,
            max_soc_pct=100,
        )
        self.assertEqual(ch, 100)

    def test_pv_surplus_sell_hold_far_from_full_zeros_charge(self) -> None:
        """Prodej PV a drž baterku daleko od maxima (bat_w<=0, SoC nízko) → 108=0."""
        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="PV_SURPLUS",
            export_ban=False,
            current_soc_pct=60.0,
            max_soc_pct=100,
        )
        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()