"""Phase 2: native_render client (thay pedalboard bằng native_bridge --render).

Unit: phân loại plugin, tìm bridge, instrument lạ → 404. E2E nhỏ: bridge render
SF2 thật ra WAV đúng duration (giống native_bridge/tests/test_offline_render.py).
Skip nếu máy thiếu bridge exe hoặc file SF2 fixture."""
import json
import os
import subprocess
import tempfile

import pytest
import soundfile as sf
from fastapi import HTTPException

from app.core import native_render


def test_classify_instrument():
    assert native_render.classify_instrument(r"C:\VST\Vital.vst3") == 0
    assert native_render.classify_instrument(r"C:\VST\foo.dll") == 1
    assert native_render.classify_instrument(r"C:\SF\a.sf2") == 2
    assert native_render.classify_instrument(r"C:\SF\a.sf3") == 2
    assert native_render.classify_instrument(r"C:\SF\a.sfz") == 3


def test_find_bridge_exe_dev():
    exe = native_render.find_bridge_exe()
    assert exe, "không tìm thấy bridge exe (install/ hoặc SF_BRIDGE_PATH)"
    assert os.path.isfile(exe)


def test_render_offline_unknown_instrument_404():
    with pytest.raises(HTTPException) as ei:
        native_render.render_offline("__no_such_plugin__", [], bpm=120.0, sample_rate=44100)
    assert ei.value.status_code == 404


def test_bridge_render_sf2_e2e():
    exe = native_render.find_bridge_exe()
    if not exe:
        pytest.skip("bridge exe missing")
    sf2 = r"C:\Users\locpham\SonicForgeStudio\app\storage\soundfonts\518e850f-a5d3-4790-b1f9-0c90c203c524.sf2"
    if not os.path.isfile(sf2):
        pytest.skip("SF2 fixture missing")
    with tempfile.TemporaryDirectory() as td:
        job = {"instrument_type": 2, "plugin_path": sf2, "sample_rate": 44100, "bpm": 120.0,
               "notes": [{"pitch": 60, "velocity": 0.8, "start_beat": 0.0, "duration_beats": 1.0}]}
        jp = os.path.join(td, "job.json")
        out = os.path.join(td, "out.wav")
        with open(jp, "w", encoding="utf-8") as fh:
            json.dump(job, fh)
        r = subprocess.run([exe, "--render", jp, "--out", out],
                           capture_output=True, text=True, timeout=120)
        assert r.returncode == 0, ((r.stdout or "") + (r.stderr or ""))[-500:]
        assert os.path.isfile(out)
        info = sf.info(out)
        assert info.samplerate == 44100
        assert info.frames == 22050


def test_plugins_bridge_branch_dispatch(monkeypatch):
    """SF_RENDER_ENGINE=bridge: _render_midi_notes_pedalboard phải đi
    vào native_render (instrument lạ -> 404), không cần pedalboard."""
    from app.api.v1 import plugins as pl
    monkeypatch.setattr(pl.settings, "RENDER_ENGINE", "bridge")
    with pytest.raises(HTTPException) as ei:
        pl._render_midi_notes_pedalboard("__no_such__", [], bpm=120.0, sample_rate=44100)
    assert ei.value.status_code == 404
def test_render_fx_chain_builtin_gain_e2e():
    """render_fx_chain (PLAN_MASTERBUS_FX_RACK_VST Phase 1): builtin gain
    +6dB qua bridge --render-fx, không cần VST. Output tồn tại, đúng sr,
    RMS gấp đôi input."""
    import math
    import numpy as np
    import soundfile as sf
    exe = native_render.find_bridge_exe()
    if not exe:
        pytest.skip("bridge exe missing")
    sr = 44100
    t = np.linspace(0, 1.0, sr, endpoint=False)
    data = (0.1 * np.sin(2 * np.pi * 440 * t)).astype(np.float32)
    with tempfile.TemporaryDirectory() as td:
        inp = os.path.join(td, "in.wav")
        sf.write(inp, data, sr, subtype="FLOAT")
        out = native_render.render_fx_chain(
            input_wav=inp,
            fx_chain=[{"type": "builtin", "id": "gain", "params": {"db": 6.0}}],
            sample_rate=sr,
        )
        assert os.path.isfile(out)
        d, _ = sf.read(out, dtype="float32", always_2d=True)
        rms = float(np.sqrt(np.mean(d ** 2)))
        assert rms > 0.09  # ~2x 0.05
        info = sf.info(out)
        assert info.samplerate == sr