"""VNEWS boot entry — self-heal + HLS live fixes before import.

1) If main.py is the PLACEHOLDER stub (or otherwise damaged), restore the
   known-good version from commit 5b6000c via huggingface_hub.
2) Apply the m3u_hls live fix to main.py if it still has the old 3-segment
   manifest: bump to 8 repeating #EXTINF:8.0 segments, add
   #EXT-X-DISCONTINUITY-SEQUENCE:0, keep the playlist open (no ENDLIST, no
   trailing #EXT-X-DISCONTINUITY).
3) Apply Hls.js live tuning to static/vtv_init.js if not present:
   liveDurationInfinity / liveSyncDurationCount / maxBufferLength.
4) Persist any local changes back to the repo 'main' branch (best-effort,
   requires a write token in the Space env, e.g. HF_TOKEN secret).
"""
import os

_APP_DIR = os.path.dirname(os.path.abspath(__file__))
_MAIN = os.path.join(_APP_DIR, "main.py")
_VTV = os.path.join(_APP_DIR, "static", "vtv_init.js")
_GOOD_REV = "5b6000c58f89723b3d228afb06c891ce909ac488"
_REPO = "bep40/VNEWS"


def _read(p):
    try:
        with open(p, encoding="utf-8", errors="replace") as f:
            return f.read()
    except Exception:
        return ""


def _write(p, s):
    with open(p, "w", encoding="utf-8") as f:
        f.write(s)


def _main_is_broken(path):
    try:
        if os.path.getsize(path) < 50000:
            return True
        head = _read(path)[:2048]
        return "PLACEHOLDER" in head or "app = FastAPI()" not in head
    except Exception:
        return True


# --- old 3-segment manifest block in main.py (verified against 5b6000c) ---
_OLD_MANIFEST = (
    '    _seg = seg_proxy_base\n'
    '    manifest = (\n'
    '        "#EXTM3U\\n"\n'
    '        "#EXT-X-VERSION:6\\n"\n'
    '        "#EXT-X-TARGETDURATION:8\\n"\n'
    '        "#EXT-X-MEDIA-SEQUENCE:0\\n"\n'
    '        "#EXT-X-START:TIME-OFFSET=0,PRECISE=YES\\n"\n'
    '        "#EXTINF:8.0,\\n"\n'
    '        + _seg + "\\n"\n'
    '        "#EXTINF:8.0,\\n"\n'
    '        + _seg + "\\n"\n'
    '        "#EXTINF:8.0,\\n"\n'
    '        + _seg + "\\n"\n'
    '    )\n'
)
_NEW_MANIFEST = (
    '    _seg = seg_proxy_base\n'
    '    manifest = (\n'
    '        "#EXTM3U\\n"\n'
    '        "#EXT-X-VERSION:6\\n"\n'
    '        "#EXT-X-TARGETDURATION:8\\n"\n'
    '        "#EXT-X-MEDIA-SEQUENCE:0\\n"\n'
    '        "#EXT-X-DISCONTINUITY-SEQUENCE:0\\n"\n'
    '        "#EXT-X-START:TIME-OFFSET=0,PRECISE=YES\\n"\n'
    + ''.join('        "#EXTINF:8.0,\\n"\n        + _seg + "\\n"\n' for _ in range(8))
    + '    )\n'
)


def _fix_main_hls(content):
    if "#EXT-X-DISCONTINUITY-SEQUENCE" in content:
        return content, False
    if content.count("#EXTINF:8.0") >= 8:
        return content, False
    if _OLD_MANIFEST not in content:
        return content, False
    new = content.replace(_OLD_MANIFEST, _NEW_MANIFEST, 1)
    if new != content:
        return new, True
    return content, False


_OLD_HLS_CONFIG = "new Hls({ enableWorker: false })"
_NEW_HLS_CONFIG = (
    "new Hls({ enableWorker: false, liveDurationInfinity: true, "
    "liveSyncDurationCount: 5, maxBufferLength: 60, maxMaxBufferLength: 240 })"
)


def _fix_vtv(content):
    if "liveDurationInfinity" in content:
        return content, False
    if _OLD_HLS_CONFIG not in content:
        return content, False
    new = content.replace(_OLD_HLS_CONFIG, _NEW_HLS_CONFIG, 1)
    return new, new != content


def _persist(fn, data):
    """Best-effort: push patched file back to the repo 'main' branch so the
    fix is permanent, not just container-local. Never raises."""
    try:
        token = os.environ.get("HF_TOKEN")
        if not token:
            print(f"[self-heal] no HF_TOKEN — skip persist {fn}", flush=True)
            return False
        from huggingface_hub import upload_file

        upload_file(
            path_or_fileobj=data.encode("utf-8"),
            path_in_repo=fn,
            repo_id=_REPO,
            repo_type="space",
            token=token,
            commit_message=f"[hls-fix] {fn}: 8 segments + live config",
        )
        print(f"[self-heal] persisted {fn}", flush=True)
        return True
    except Exception as e:
        print(f"[self-heal] persist {fn} failed: {e}", flush=True)
        return False


def _restore_main():
    print(f"[self-heal] main.py damaged -> restoring from {_GOOD_REV}", flush=True)
    try:
        from huggingface_hub import hf_hub_download

        good = hf_hub_download(
            repo_id=_REPO,
            filename="main.py",
            revision=_GOOD_REV,
            repo_type="space",
        )
        with open(good, encoding="utf-8") as f:
            data = f.read()
        assert "app = FastAPI()" in data and "proxy_m3u_hls" in data
        _write(_MAIN, data)
        print(f"[self-heal] main.py restored ({len(data)} bytes)", flush=True)
        return True
    except Exception as e:
        print(f"[self-heal] FAILED to restore main.py: {e}", flush=True)
        return False


def _apply_fixes():
    changed = []
    try:
        if _main_is_broken(_MAIN):
            _restore_main()
        mc = _read(_MAIN)
        if mc:
            nm, changed_m = _fix_main_hls(mc)
            if changed_m:
                _write(_MAIN, nm)
                print("[hls] main.py patched: 8 segments + DISCONTINUITY-SEQUENCE:0", flush=True)
                changed.append("main.py")
        vc = _read(_VTV)
        if vc:
            nv, changed_v = _fix_vtv(vc)
            if changed_v:
                _write(_VTV, nv)
                print("[hls] vtv_init.js patched: liveDurationInfinity config", flush=True)
                changed.append("static/vtv_init.js")
    except Exception as e:
        print(f"[hls] review fixes failed (non-fatal): {e}", flush=True)
    for fn in changed:
        try:
            _persist(fn, _read(os.path.join(_APP_DIR, fn)))
        except Exception as e:
            print(f"[hls] persist {fn} error: {e}", flush=True)


_apply_fixes()

from app_v2_entry import app  # v5-stable inline bongda proxy