"""Live calibration choice in the sensor dialog: pick, remember, open, hot-apply."""

from __future__ import annotations

import json
from pathlib import Path

import pytest
from orisys_app_shared.i18n import t
from orisys_app_shared.sensors import scan_sensor_catalog
from orisys_studio.ui import sensor_picker as picker_module
from orisys_studio.ui.sensor_dialog import ROLE_DEFAULT, ROLE_FILE, ROLE_NONE, SensorDialog
from orisys_studio.ui.sensor_picker import SensorPickerWidget
from PySide6.QtWidgets import QWidget

CONFIG = {
    "name": "fixture",
    "camera": {
        "resolution_raw": [640, 480],
        "fps": 30,
        "resolution_stitch": [100, 100],
    },
    "tracker": {"algorithm": "dis"},
    "stitcher": {"n": [1, 1]},
}


def _write(path: Path, payload: object) -> None:
    path.parent.mkdir(parents=True, exist_ok=True)
    path.write_text(json.dumps(payload, indent=2), encoding="utf-8")


def _descriptor(profile_id: str, **overrides: object) -> dict[str, object]:
    data: dict[str, object] = {
        "schema_version": 1,
        "profile_id": profile_id,
        "display_name": "Mini lab",
        "product_family": "mini",
        "processing_backend": "single_camera",
        "sensor_json": "sensor.json",
    }
    data.update(overrides)
    return data


class _Host(QWidget):
    """Window stand-in with the live-calibration prefs API the dialog expects."""

    def __init__(self) -> None:
        super().__init__()
        self.prefs: dict = {}
        self.applied = 0
        self._choices: dict[str, tuple[str, Path | None, str]] = {}
        self.picker: SensorPickerWidget | None = None
        self._dialog: SensorDialog | None = None

    def _on_reveal_config(self) -> None:
        return

    def _prefs_key(self) -> str | None:
        if self.picker is None:
            return None
        entry = self.picker.selected_entry()
        return None if entry is None else entry.ref

    def live_calibration_choice(self) -> tuple[str, Path | None, str]:
        key = self._prefs_key()
        if not key:
            return ROLE_NONE, None, ""
        return self._choices.get(key, (ROLE_NONE, None, ""))

    def set_live_calibration_choice(
        self,
        *,
        role: str,
        path: Path | str | None = None,
        device_id: str | None = None,
    ) -> None:
        key = self._prefs_key()
        if not key:
            return
        file_path = Path(path) if role == ROLE_FILE and path else None
        self._choices[key] = (role, file_path, str(device_id or ""))
        store = self.prefs.setdefault("live_calibration", {})
        payload: dict[str, str] = {"role": role}
        if file_path is not None:
            payload["path"] = str(file_path)
        if device_id:
            payload["device_id"] = str(device_id)
        store[key] = payload

    def apply_live_calibration_choice(self) -> None:
        if self._dialog is not None and self._dialog.choice_problem():
            return
        self.applied += 1


def _make_picker(qt_app, tmp_path, monkeypatch, build):
    root = tmp_path / "user"
    build(root)
    catalog = scan_sensor_catalog(
        shipped_root=tmp_path / "no-shipped-root", user_root=root
    )
    monkeypatch.setattr(picker_module, "scan_sensor_catalog", lambda: catalog)
    return SensorPickerWidget()


def _dialog_for(picker) -> tuple[_Host, SensorDialog]:
    host = _Host()
    host.picker = picker
    dialog = SensorDialog(window=host, picker=picker)
    host._dialog = dialog
    return host, dialog


def test_without_a_profile_default_the_combo_starts_on_raw_force(
    qt_app, tmp_path, monkeypatch
):
    def build(root: Path) -> None:
        _write(root / "mini-lab" / "sensor.json", CONFIG)
        _write(root / "mini-lab" / "manifest.json", _descriptor("orisys.mini.lab-r1"))

    picker = _make_picker(qt_app, tmp_path, monkeypatch, build)
    picker.set_sensor_type("mini")
    _host, dialog = _dialog_for(picker)
    try:
        assert dialog.calibration_combo.findData(ROLE_DEFAULT) < 0
        assert dialog.current_role() == ROLE_NONE
        assert dialog.current_calibration_path() is None
        assert t("sensor.catalog_calibration_none") in dialog.profile_label.text()
    finally:
        dialog.deleteLater()
        picker.deleteLater()


def test_a_box_profile_default_appears_as_a_combo_row(qt_app):
    """The shipped box bundle declares ``force_calibration.json`` as its default."""
    picker = SensorPickerWidget()
    picker.set_sensor_type("box")
    entry = picker.selected_entry()
    assert entry is not None
    assert entry.profile is not None
    assert entry.profile.default_calibration is not None, (
        "premise: shipped box must expose a profile default calibration"
    )
    _host, dialog = _dialog_for(picker)
    try:
        assert dialog.calibration_combo.findData(ROLE_DEFAULT) >= 0
        assert dialog.calibration_combo.findData(ROLE_NONE) >= 0
        assert dialog.current_role() == ROLE_NONE
        dialog.calibration_combo.setCurrentIndex(
            dialog.calibration_combo.findData(ROLE_DEFAULT)
        )
        path = dialog.current_calibration_path()
        assert path is not None and path.name == "force_calibration.json"
        assert t(
            "sensor.catalog_calibration_selected", name="force_calibration.json"
        ) in dialog.profile_label.text()
    finally:
        dialog.deleteLater()
        picker.deleteLater()


def test_browsing_a_file_shows_its_name_and_persists_per_bundle(
    qt_app, tmp_path, monkeypatch
):
    def build(root: Path) -> None:
        for name, family, profile in (
            ("mini-a", "mini", "orisys.mini.a-r1"),
            ("finger-a", "finger", "orisys.finger.a-r1"),
        ):
            folder = root / name
            _write(folder / "sensor.json", CONFIG)
            extras = {
                "display_name": name,
                "product_family": family,
                "processing_backend": (
                    "uv_unroll" if family == "finger" else "single_camera"
                ),
            }
            if family == "finger":
                extras["computational_assets"] = {}
            _write(folder / "manifest.json", _descriptor(profile, **extras))

    picker = _make_picker(qt_app, tmp_path, monkeypatch, build)
    host, dialog = _dialog_for(picker)
    cal = tmp_path / "custom.json"
    cal.write_text(
        json.dumps({"meta": {"sensor_type": "mini", "sn": "X"}}), encoding="utf-8"
    )
    try:
        picker.set_sensor_type("mini")
        dialog.select_calibration_file(cal)
        assert dialog.current_role() == ROLE_FILE
        assert dialog.calibration_combo.currentText() == t(
            "video_analysis.calibration_file", name="custom.json"
        )
        mini_key = picker.selected_entry().ref
        assert host.prefs["live_calibration"][mini_key]["path"] == str(cal)

        picker.set_sensor_type("finger")
        dialog.refresh()
        assert dialog.current_role() == ROLE_NONE
        finger_key = picker.selected_entry().ref
        assert finger_key != mini_key
        assert ROLE_FILE != host.prefs.get("live_calibration", {}).get(
            finger_key, {}
        ).get("role")
    finally:
        dialog.deleteLater()
        picker.deleteLater()


def test_a_finger_file_with_a_mismatched_sn_is_not_a_valid_choice(
    qt_app, tmp_path, monkeypatch
):
    def build(root: Path) -> None:
        folder = root / "finger-lab"
        _write(folder / "sensor.json", CONFIG)
        _write(
            folder / "manifest.json",
            _descriptor(
                "orisys.finger.lab-r1",
                display_name="Finger lab",
                product_family="finger",
                processing_backend="uv_unroll",
                computational_assets={},
            ),
        )

    picker = _make_picker(qt_app, tmp_path, monkeypatch, build)
    picker.set_sensor_type("finger")
    host, dialog = _dialog_for(picker)
    cal = tmp_path / "DD02-14.json"
    cal.write_text(
        json.dumps({"meta": {"sensor_type": "finger", "sn": "DD02-14"}}),
        encoding="utf-8",
    )
    try:
        dialog.select_calibration_file(cal)
        # Offscreen dialogs are not shown; ``isHidden`` is the visibility flag.
        assert not dialog.device_edit.isHidden()
        assert dialog.device_edit.text() == "DD02-14"
        assert dialog.choice_problem() == ""
        dialog.device_edit.setText("OTHER")
        assert dialog.choice_problem() == t(
            "video_analysis.device_mismatch", sn="DD02-14"
        )
        dialog.btn_apply.click()
        assert host.applied == 0
    finally:
        dialog.deleteLater()
        picker.deleteLater()


def test_window_resolves_finger_file_choice_for_open(make_window, tmp_path):
    window = make_window()
    cal = tmp_path / "DD02-14.json"
    cal.write_text(
        json.dumps({"meta": {"sensor_type": "finger", "sn": "DD02-14"}}),
        encoding="utf-8",
    )
    finger = next(
        (
            entry
            for entry in scan_sensor_catalog().entries
            if str(entry.product_family) == "finger"
            and entry.start_blocked_reason is None
        ),
        None,
    )
    if finger is None:
        pytest.skip("no startable Finger profile in the catalog")
    window.sensor_picker.set_sensor_type("finger")
    window.sensor_picker.set_config_name(finger.key)
    window.set_live_calibration_choice(
        role=ROLE_FILE, path=cal, device_id="DD02-14"
    )
    cal_path, device_id, problem = window._resolved_live_calibration()
    assert problem == ""
    assert cal_path == cal
    assert device_id == "DD02-14"

    window.set_live_calibration_choice(
        role=ROLE_FILE, path=cal, device_id="OTHER"
    )
    _path, _device, problem = window._resolved_live_calibration()
    assert problem == t("video_analysis.device_mismatch", sn="DD02-14")


def test_apply_while_running_queues_set_pending_calibration(make_window, tmp_path):
    window = make_window()
    cal = tmp_path / "force_calibration.json"
    cal.write_text('{"schema_version": 2}', encoding="utf-8")
    window.set_live_calibration_choice(role=ROLE_FILE, path=cal)
    pending: list[str] = []

    class _Worker:
        def add_sink(self, _sink) -> None:
            return

        def set_pending_calibration(self, path) -> None:
            pending.append(str(path))

    worker = _Worker()
    # Both slots filled so ``ensure_workers`` does not replace the shim.
    window.session.set_worker("box", worker)
    window.session.set_worker("finger", worker)
    window.session.select_worker("box")
    window.session.set_running(True)
    assert window._running
    assert window._active_worker is worker

    window.apply_live_calibration_choice()
    assert pending == [str(cal)]

    pending.clear()
    window.set_live_calibration_choice(role=ROLE_NONE)
    window.apply_live_calibration_choice()
    assert pending == []
    assert window.statusBar().currentMessage() == t("sensor.live_calibration_remembered")