"""Tier 1 — Backend unit tests for Marionette.

Run without hardware, without daemon, in under 5 seconds.
Tests the HTTP API layer, state machine, data validation, and persistence.
"""

import json
from io import BytesIO
from pathlib import Path

import pytest
from fastapi.testclient import TestClient

from marionette.main import (
    Marionette,
    _slugify,
    create_app,
    DEFAULT_DURATION,
    COUNTDOWN_SECONDS,
    MOTION_SAMPLE_RATE,
    DATASET_DATA_SUBDIR,
)


# ──────── Utility function tests ──────────────────────────────────────


class TestSlugify:
    def test_simple_lowercase(self):
        assert _slugify("Hello World") == "hello-world"

    def test_special_chars(self):
        assert _slugify("my@move#1!") == "my-move-1"

    def test_leading_trailing_hyphens(self):
        assert _slugify("---test---") == "test"

    def test_empty_string(self):
        assert _slugify("") == "take"

    def test_unicode(self):
        result = _slugify("café résumé")
        assert result == "caf-r-sum"

    def test_already_slugified(self):
        assert _slugify("gentle-nod") == "gentle-nod"

    def test_numbers(self):
        assert _slugify("take 42") == "take-42"


# ──────── State endpoint tests ────────────────────────────────────────


class TestStateEndpoint:
    def test_returns_200(self, client: TestClient):
        resp = client.get("/api/state")
        assert resp.status_code == 200

    def test_initial_mode_is_idle(self, client: TestClient):
        data = client.get("/api/state").json()
        assert data["mode"] == "idle"

    def test_initial_message(self, client: TestClient):
        data = client.get("/api/state").json()
        assert data["message"] == "Ready to capture moves"

    def test_state_shape(self, client: TestClient):
        data = client.get("/api/state").json()
        required_keys = {
            "server_time", "mode", "message", "active_move",
            "phase_start_at", "phase_end_at",
            "countdown_ends_at",
            "recording_started_at", "recording_duration", "recording_stats",
            "pending_recording", "pending_playback",
            "moves", "config", "datasets",
        }
        assert required_keys.issubset(data.keys())

    def test_server_time_present(self, client: TestClient):
        import time
        data = client.get("/api/state").json()
        assert isinstance(data["server_time"], float)
        # Should be close to current time (within 5 seconds)
        assert abs(data["server_time"] - time.time()) < 5.0

    def test_idle_phase_timing_null(self, client: TestClient):
        data = client.get("/api/state").json()
        assert data["phase_start_at"] is None
        assert data["phase_end_at"] is None

    def test_config_shape(self, client: TestClient):
        config = client.get("/api/state").json()["config"]
        assert config["default_duration"] == DEFAULT_DURATION
        assert config["countdown_seconds"] == COUNTDOWN_SECONDS
        assert config["motion_sample_rate"] == MOTION_SAMPLE_RATE
        assert isinstance(config["audio_available"], bool)
        assert isinstance(config["features"], dict)

    def test_initial_moves_empty(self, client: TestClient):
        data = client.get("/api/state").json()
        assert data["moves"] == []

    def test_initial_no_pending(self, client: TestClient):
        data = client.get("/api/state").json()
        assert data["pending_recording"] is None
        assert data["pending_playback"] is None


class TestStartingUpMode:
    def test_starting_up_rejects_recording(self, client: TestClient, marionette: Marionette):
        """Commands are rejected while the robot is still starting up."""
        marionette._set_state(mode="starting_up", message="Starting up…", active_move=None)
        resp = client.post("/api/record", json={"duration": 3.0, "record_audio": False})
        assert resp.status_code == 409
        marionette._set_idle_state()

    def test_starting_up_rejects_dataset_changes(self, client: TestClient, marionette: Marionette):
        marionette._set_state(mode="starting_up", message="Starting up…", active_move=None)
        resp = client.post("/api/datasets", json={"name": "test"})
        assert resp.status_code == 409
        marionette._set_idle_state()

    def test_starting_up_state_visible(self, client: TestClient, marionette: Marionette):
        marionette._set_state(mode="starting_up", message="Starting up…", active_move=None)
        data = client.get("/api/state").json()
        assert data["mode"] == "starting_up"
        assert "starting" in data["message"].lower()
        marionette._set_idle_state()


# ──────── Recording endpoint tests ────────────────────────────────────


class TestRecordEndpoint:
    def test_accept_basic_recording(self, client: TestClient):
        resp = client.post("/api/record", json={
            "duration": 3.0,
            "record_audio": False,
        })
        assert resp.status_code == 200
        data = resp.json()
        assert data["accepted"] is True
        assert "move_id" in data

    def test_mode_becomes_queued(self, client: TestClient):
        client.post("/api/record", json={"duration": 3.0, "record_audio": False})
        state = client.get("/api/state").json()
        assert state["mode"] == "queued"

    def test_reject_when_busy(self, client: TestClient):
        # First recording is accepted
        resp1 = client.post("/api/record", json={"duration": 3.0, "record_audio": False})
        assert resp1.status_code == 200
        # Second recording is rejected (mode is now "queued")
        resp2 = client.post("/api/record", json={"duration": 3.0, "record_audio": False})
        assert resp2.status_code == 409

    def test_reject_invalid_duration_too_low(self, client: TestClient):
        resp = client.post("/api/record", json={"duration": 0.1, "record_audio": False})
        assert resp.status_code == 422  # Pydantic validation

    def test_reject_invalid_duration_too_high(self, client: TestClient):
        resp = client.post("/api/record", json={"duration": 999.0, "record_audio": False})
        assert resp.status_code == 422

    def test_accept_duration_edge_cases(self, client: TestClient, marionette: Marionette):
        # Just above minimum
        resp = client.post("/api/record", json={"duration": 0.6, "record_audio": False})
        assert resp.status_code == 200
        # Reset for next test
        marionette._set_idle_state()
        marionette._pending_recording = None

        # At maximum
        resp = client.post("/api/record", json={"duration": 300.0, "record_audio": False})
        assert resp.status_code == 200

    def test_custom_label(self, client: TestClient):
        resp = client.post("/api/record", json={
            "duration": 3.0,
            "record_audio": False,
            "label": "happy-dance",
        })
        data = resp.json()
        assert data["label"] == "happy-dance"
        assert data["move_id"] == "happy-dance"

    def test_label_collision_appends_index(
        self, client: TestClient, marionette: Marionette, tmp_dataset_root: Path
    ):
        # Create a file that would collide
        data_dir = tmp_dataset_root / "local_dataset" / DATASET_DATA_SUBDIR
        data_dir.mkdir(parents=True, exist_ok=True)
        (data_dir / "happy-dance.json").write_text("{}")

        resp = client.post("/api/record", json={
            "duration": 3.0,
            "record_audio": False,
            "label": "happy-dance",
        })
        data = resp.json()
        assert data["move_id"] == "happy-dance-1"

    def test_preferred_duration_saved(self, client: TestClient, marionette: Marionette):
        client.post("/api/record", json={"duration": 7.5, "record_audio": False})
        assert marionette._preferred_duration == 7.5


# ──────── Playback endpoint tests ─────────────────────────────────────


class TestPlayEndpoint:
    def test_reject_missing_move(self, client: TestClient):
        resp = client.post("/api/play", json={"move_id": "nonexistent"})
        assert resp.status_code == 404

    def test_accept_existing_move(
        self, client: TestClient, marionette: Marionette, sample_move_json: dict
    ):
        # Write a move file to the dataset
        data_dir = marionette._dataset_dir
        move_path = data_dir / "test-move.json"
        move_path.write_text(json.dumps(sample_move_json))
        marionette._refresh_recordings()

        resp = client.post("/api/play", json={"move_id": "test-move"})
        assert resp.status_code == 200
        assert resp.json()["accepted"] is True

    def test_reject_play_when_busy(
        self, client: TestClient, marionette: Marionette, sample_move_json: dict
    ):
        data_dir = marionette._dataset_dir
        (data_dir / "test-move.json").write_text(json.dumps(sample_move_json))
        marionette._refresh_recordings()

        # First play is accepted
        resp1 = client.post("/api/play", json={"move_id": "test-move"})
        assert resp1.status_code == 200
        # Second play is rejected (mode is queued)
        resp2 = client.post("/api/play", json={"move_id": "test-move"})
        assert resp2.status_code == 409


# ──────── Stop endpoints ──────────────────────────────────────────────


class TestStopEndpoints:
    def test_stop_playback_when_not_playing(self, client: TestClient):
        resp = client.post("/api/play/stop")
        assert resp.status_code == 200
        assert resp.json()["stopped"] is False

    def test_stop_recording_when_not_recording(self, client: TestClient):
        resp = client.post("/api/record/stop")
        assert resp.status_code == 200
        assert resp.json()["stopped"] is False

    def test_stop_recording_while_queued(self, client: TestClient, marionette: Marionette):
        """Stopping a queued recording should cancel it and return to idle."""
        # Put the app in queued state by submitting a recording
        resp = client.post(
            "/api/record",
            json={"label": "test-queued", "duration": 5.0, "record_audio": False},
        )
        assert resp.status_code == 200
        assert resp.json()["accepted"] is True

        # Verify we're in queued mode
        state = client.get("/api/state").json()
        assert state["mode"] == "queued"

        # Stop should work even in queued mode
        resp = client.post("/api/record/stop")
        assert resp.status_code == 200
        assert resp.json()["stopped"] is True

        # Should be back to idle
        state = client.get("/api/state").json()
        assert state["mode"] == "idle"
        assert "cancelled" in state["message"].lower()


# ──────── Move deletion tests ─────────────────────────────────────────


class TestMoveDelete:
    def test_delete_existing_move(
        self, client: TestClient, marionette: Marionette, sample_move_json: dict
    ):
        data_dir = marionette._dataset_dir
        move_path = data_dir / "to-delete.json"
        move_path.write_text(json.dumps(sample_move_json))
        marionette._refresh_recordings()

        resp = client.delete("/api/moves/to-delete")
        assert resp.status_code == 200
        assert not move_path.exists()

    def test_delete_nonexistent_move(self, client: TestClient):
        resp = client.delete("/api/moves/nonexistent")
        assert resp.status_code == 404

    def test_delete_removes_wav(
        self, client: TestClient, marionette: Marionette, sample_move_json: dict
    ):
        data_dir = marionette._dataset_dir
        (data_dir / "with-audio.json").write_text(json.dumps(sample_move_json))
        (data_dir / "with-audio.wav").write_bytes(b"RIFF" + b"\x00" * 100)
        marionette._refresh_recordings()

        client.delete("/api/moves/with-audio")
        assert not (data_dir / "with-audio.json").exists()
        assert not (data_dir / "with-audio.wav").exists()

    def test_delete_updates_move_list(
        self, client: TestClient, marionette: Marionette, sample_move_json: dict
    ):
        data_dir = marionette._dataset_dir
        (data_dir / "test-move.json").write_text(json.dumps(sample_move_json))
        marionette._refresh_recordings()

        state_before = client.get("/api/state").json()
        assert len(state_before["moves"]) == 1

        client.delete("/api/moves/test-move")
        state_after = client.get("/api/state").json()
        assert len(state_after["moves"]) == 0


# ──────── Dataset management tests ────────────────────────────────────


class TestDatasets:
    def test_initial_default_dataset(self, client: TestClient):
        data = client.get("/api/state").json()
        datasets = data["datasets"]
        assert datasets["active_id"] is not None
        assert len(datasets["entries"]) >= 1

    def test_create_dataset(self, client: TestClient):
        resp = client.post("/api/datasets", json={"name": "My Dances"})
        assert resp.status_code == 200
        data = resp.json()
        assert data["status"] == "created"
        assert data["dataset"]["folder"] == "my-dances"

    def test_create_duplicate_dataset_rejected(self, client: TestClient):
        client.post("/api/datasets", json={"name": "dances"})
        resp = client.post("/api/datasets", json={"name": "dances"})
        assert resp.status_code == 409

    def test_select_dataset(self, client: TestClient):
        # Create a second dataset
        resp = client.post("/api/datasets", json={"name": "second"})
        dataset_id = resp.json()["dataset"]["id"]

        # Default is auto-selected after create, so select the original
        state = client.get("/api/state").json()
        original_id = [
            e["id"] for e in state["datasets"]["entries"]
            if e["id"] != dataset_id
        ][0]

        resp = client.post("/api/datasets/select", json={"dataset_id": original_id})
        assert resp.status_code == 200

    def test_select_nonexistent_dataset(self, client: TestClient):
        resp = client.post("/api/datasets/select", json={"dataset_id": "fake"})
        assert resp.status_code == 404

    def test_dataset_root_change(self, client: TestClient, tmp_path: Path):
        new_root = tmp_path / "new_root"
        new_root.mkdir()
        resp = client.post("/api/datasets/root", json={"path": str(new_root)})
        assert resp.status_code == 200
        assert resp.json()["root_path"] == str(new_root)

    def test_default_dataset_origin_is_local(self, client: TestClient):
        state = client.get("/api/state").json()
        entries = state["datasets"]["entries"]
        assert all(e.get("origin") == "local" for e in entries)

    def test_created_dataset_origin_is_local(self, client: TestClient):
        resp = client.post("/api/datasets", json={"name": "my-local"})
        assert resp.status_code == 200
        assert resp.json()["dataset"]["origin"] == "local"

    def test_record_blocked_on_downloaded_dataset(
        self, client: TestClient, marionette: Marionette
    ):
        """Recording should be rejected when the active dataset is downloaded."""
        # Create a dataset and tag it as downloaded
        entry = marionette._create_dataset_internal("dl-test", "Downloaded Test", origin="downloaded")
        marionette._select_dataset(entry.dataset_id)
        marionette._refresh_recordings()

        resp = client.post("/api/record", json={"duration": 3.0, "record_audio": False})
        assert resp.status_code == 409
        assert "downloaded" in resp.json()["detail"].lower()

    def test_record_allowed_on_local_dataset(
        self, client: TestClient, marionette: Marionette
    ):
        """Recording should be accepted when the active dataset is local."""
        # Default dataset is local, just verify recording is accepted
        resp = client.post("/api/record", json={"duration": 3.0, "record_audio": False})
        assert resp.status_code == 200
        assert resp.json()["accepted"] is True

    def test_origin_persisted_in_registry(
        self, marionette: Marionette, tmp_registry: Path
    ):
        """Origin field should be saved and restored from registry."""
        entry = marionette._create_dataset_internal("persisted-dl", "Persisted DL", origin="downloaded")
        marionette._save_dataset_registry()
        raw = json.loads(tmp_registry.read_text(encoding="utf-8"))
        ds_entry = next(d for d in raw["datasets"] if d["folder"] == "persisted-dl")
        assert ds_entry["origin"] == "downloaded"


# ──────── Registry persistence tests ──────────────────────────────────


class TestRegistryPersistence:
    def test_registry_created_on_init(self, tmp_registry: Path, tmp_dataset_root: Path):
        create_app(registry_path=tmp_registry, dataset_root=tmp_dataset_root)
        assert tmp_registry.exists()
        data = json.loads(tmp_registry.read_text())
        assert "active" in data
        assert "datasets" in data

    def test_registry_survives_restart(self, tmp_registry: Path, tmp_dataset_root: Path):
        # First instance creates a dataset
        app1, m1 = create_app(registry_path=tmp_registry, dataset_root=tmp_dataset_root)
        client1 = TestClient(app1)
        client1.post("/api/datasets", json={"name": "persistent-ds"})

        # Second instance should see it
        app2, m2 = create_app(registry_path=tmp_registry, dataset_root=tmp_dataset_root)
        client2 = TestClient(app2)
        state = client2.get("/api/state").json()
        folders = [e["folder"] for e in state["datasets"]["entries"]]
        assert "persistent-ds" in folders

    def test_preferred_duration_persisted(self, tmp_registry: Path, tmp_dataset_root: Path):
        app1, m1 = create_app(registry_path=tmp_registry, dataset_root=tmp_dataset_root)
        client1 = TestClient(app1)
        client1.post("/api/record", json={"duration": 8.5, "record_audio": False})

        # Re-create and check
        _, m2 = create_app(registry_path=tmp_registry, dataset_root=tmp_dataset_root)
        assert m2._preferred_duration == 8.5


# ──────── Moves list / refresh tests ──────────────────────────────────


class TestMovesRefresh:
    def test_moves_appear_after_file_creation(
        self, client: TestClient, marionette: Marionette, sample_move_json: dict
    ):
        data_dir = marionette._dataset_dir
        (data_dir / "my-move.json").write_text(json.dumps(sample_move_json))
        marionette._refresh_recordings()

        state = client.get("/api/state").json()
        move_ids = [m["id"] for m in state["moves"]]
        assert "my-move" in move_ids

    def test_move_duration_computed_correctly(
        self, client: TestClient, marionette: Marionette, sample_move_json: dict
    ):
        data_dir = marionette._dataset_dir
        (data_dir / "timed.json").write_text(json.dumps(sample_move_json))
        marionette._refresh_recordings()

        state = client.get("/api/state").json()
        move = next(m for m in state["moves"] if m["id"] == "timed")
        # 500 frames at 100Hz = 4.99s (last timestamp is 4.99)
        assert 4.5 < move["duration"] < 5.5

    def test_move_has_audio_flag(
        self, client: TestClient, marionette: Marionette, sample_move_json: dict
    ):
        data_dir = marionette._dataset_dir
        (data_dir / "audio-move.json").write_text(json.dumps(sample_move_json))
        (data_dir / "audio-move.wav").write_bytes(b"RIFF" + b"\x00" * 100)
        marionette._refresh_recordings()

        state = client.get("/api/state").json()
        move = next(m for m in state["moves"] if m["id"] == "audio-move")
        assert move["has_audio"] is True

    def test_move_without_audio(
        self, client: TestClient, marionette: Marionette, sample_move_json: dict
    ):
        data_dir = marionette._dataset_dir
        (data_dir / "silent-move.json").write_text(json.dumps(sample_move_json))
        marionette._refresh_recordings()

        state = client.get("/api/state").json()
        move = next(m for m in state["moves"] if m["id"] == "silent-move")
        assert move["has_audio"] is False


# ──────── Experiment / feature toggle tests ───────────────────────────


class TestExperiments:
    def test_denoise_feature_removed(self, client: TestClient):
        """Denoise feature was removed; the features dict should not contain it."""
        data = client.get("/api/state").json()
        assert "denoise" not in data["config"]["features"]

    def test_toggle_motion_models(self, client: TestClient):
        resp = client.post("/api/experiments", json={"motion_models": True})
        assert resp.status_code == 200
        assert resp.json()["features"]["motion_models"] is True

    def test_update_duration(self, client: TestClient):
        resp = client.post("/api/experiments", json={"duration_seconds": 10.0})
        assert resp.status_code == 200
        assert resp.json()["preferred_duration"] == 10.0

    def test_no_changes(self, client: TestClient):
        resp = client.post("/api/experiments", json={})
        assert resp.json()["status"] == "unchanged"


# ──────── Sensor data dummy endpoint ──────────────────────────────────


class TestHfAutoLogin:
    def test_state_includes_hf_username_key(self, client: TestClient):
        config = client.get("/api/state").json()["config"]
        assert "hf_username" in config
        # Value is None when not logged in, or a string when logged in
        assert config["hf_username"] is None or isinstance(config["hf_username"], str)

    def test_auto_detected_username_in_state(self, client: TestClient, marionette: Marionette):
        """When HF login is detected, username appears in state."""
        marionette._hf_checked = False
        marionette._hf_username = None
        import marionette.main as mm
        original_whoami = mm.hf_whoami
        mm.hf_whoami = lambda: {"name": "testuser"}
        try:
            config = client.get("/api/state").json()["config"]
            assert config["hf_username"] == "testuser"
        finally:
            mm.hf_whoami = original_whoami

    def test_cached_after_first_check(self, marionette: Marionette):
        """HF login check is cached after first call."""
        import marionette.main as mm
        call_count = 0
        original_whoami = mm.hf_whoami

        def counting_whoami():
            nonlocal call_count
            call_count += 1
            return {"name": "cached-user"}

        mm.hf_whoami = counting_whoami
        marionette._hf_checked = False
        marionette._hf_username = None
        try:
            result1 = marionette._check_hf_login()
            result2 = marionette._check_hf_login()
            assert result1 == "cached-user"
            assert result2 == "cached-user"
            assert call_count == 1
        finally:
            mm.hf_whoami = original_whoami

    def test_sync_without_username_uses_autodetected(
        self, client: TestClient, marionette: Marionette, tmp_path: Path
    ):
        """Sync endpoint uses auto-detected username when none provided."""
        import marionette.main as mm
        original_whoami = mm.hf_whoami
        marionette._hf_checked = False
        marionette._hf_username = None
        mm.hf_whoami = lambda: {"name": "auto-user"}
        try:
            # No moves exist, so sync will fail with 400 (no moves found),
            # but we verify it gets past the username check
            resp = client.post("/api/datasets/sync", json={"move_ids": ["nonexistent"]})
            # 404 = move not found (got past the username validation)
            assert resp.status_code == 404
        finally:
            mm.hf_whoami = original_whoami

    def test_sync_without_username_and_no_login_returns_400(
        self, client: TestClient, marionette: Marionette
    ):
        """Sync without username and no HF login returns 400."""
        import marionette.main as mm
        original_whoami = mm.hf_whoami
        marionette._hf_checked = False
        marionette._hf_username = None
        mm.hf_whoami = None
        try:
            resp = client.post("/api/datasets/sync", json={"move_ids": ["some-move"]})
            assert resp.status_code == 400
            assert "not logged in" in resp.json()["detail"].lower()
        finally:
            mm.hf_whoami = original_whoami


class TestSensorData:
    def test_returns_empty(self, client: TestClient):
        resp = client.get("/sensor_data")
        assert resp.status_code == 200
        assert resp.json() == {}