VoiceStudio/backend/api/routers/personas.py

"""HTTP layer for the `.ovsvoice` portable persona format (#29 / parity §R3 G1).

Thin router over `services.persona_bundle`:

    POST /personas/export/{profile_id}   → stream a downloadable .ovsvoice
    POST /personas/import                → create a profile from a bundle
    POST /personas/inspect               → read a bundle's manifest, no writes

Mirrors the legacy `.omnivoice` endpoints (`marketplace.py`) and reuses the
same path-confinement (`_voices_path`) + consent floor. `.ovsvoice` is additive;
`.omnivoice` import stays a compatible legacy reader.
"""
from __future__ import annotations

import asyncio
import functools
import logging
import os
import time
import uuid

from fastapi import APIRouter, File, HTTPException, Query, UploadFile
from fastapi.responses import StreamingResponse

from core import event_bus
from core.config import VOICES_DIR  # noqa: F401 — re-exported for tests/monkeypatch
from core.db import db_conn
from core.version import APP_VERSION
from services import persona_bundle as pb

router = APIRouter()
logger = logging.getLogger("omnivoice.personas")


def _safe_name(name: str, profile_id: str) -> str:
    """Sanitised download filename stem (marketplace idiom); empty → persona_<id>."""
    cleaned = "".join(
        c if c.isalnum() or c in "-_ " else "" for c in (name or "")
    ).strip().replace(" ", "_")[:40]
    return cleaned or f"persona_{profile_id}"


# ── Export ────────────────────────────────────────────────────────────────


@router.post("/personas/export/{profile_id}")
async def export_persona(
    profile_id: str,
    license_spdx: str = Query(pb.DEFAULT_LICENSE),
    tags: str = Query(""),
    include_reference: bool = Query(True),
):
    """Build + stream a `.ovsvoice` bundle for a profile."""
    with db_conn() as conn:
        row = conn.execute(
            "SELECT * FROM voice_profiles WHERE id = ?", (profile_id,)
        ).fetchone()
    if not row:
        raise HTTPException(status_code=404, detail="Voice profile not found")
    profile = dict(row)

    tag_list = [t.strip() for t in tags.split(",") if t.strip()]
    try:
        loop = asyncio.get_running_loop()
        content = await loop.run_in_executor(
            None,
            functools.partial(
                pb.build_persona_bundle,
                profile,
                license_spdx=license_spdx,
                tags=tag_list,
                include_reference=include_reference,
                engine_id=os.environ.get("OMNIVOICE_MODEL", ""),
                omnivoice_version=APP_VERSION,
            ),
        )
    except pb.NoPreviewSource:
        raise HTTPException(
            status_code=503,
            detail="This profile has no readable reference or locked audio to "
                   "build a preview from — re-create or re-import it.",
        )
    except Exception:
        logger.exception("persona export failed for %s", profile_id)
        raise HTTPException(
            status_code=503,
            detail="Could not build the persona bundle — see Settings → Logs.",
        )

    filename = f"{_safe_name(profile.get('name'), profile_id)}.ovsvoice"
    from io import BytesIO
    return StreamingResponse(
        BytesIO(content),
        media_type="application/zip",
        headers={
            "Content-Disposition": f'attachment; filename="{filename}"',
            "Content-Length": str(len(content)),
        },
    )


# ── Import ────────────────────────────────────────────────────────────────


def _voices_dest(filename: str) -> str:
    """Resolve an output filename inside VOICES_DIR; 400 on escape (belt+braces —
    the name is always server-generated `{profile_id}…`)."""
    from api.routers.profiles import _voices_path
    path = _voices_path(filename)
    if path is None:
        raise HTTPException(status_code=400, detail="Invalid profile id")
    return path


def _consent_verified(parsed: pb.ParsedPersona, consent_path: str | None) -> bool:
    """B12-B16: trust verified-own-voice ONLY with a real recording (≥ floor) AND
    non-empty consent_text AND a consent.json present. The manifest flag alone
    can't forge it."""
    if not parsed.consent or not consent_path:
        return False
    if os.path.getsize(consent_path) < pb._MIN_CONSENT_AUDIO_BYTES:
        return False
    return bool((parsed.consent.get("consent_text") or "").strip())


@router.post("/personas/import")
async def import_persona(file: UploadFile = File(...)):
    """Create a new voice profile from a `.ovsvoice` (or legacy `.omnivoice`) bundle."""
    name = (file.filename or "").lower()
    if not name.endswith(".ovsvoice") and not name.endswith(".omnivoice"):
        raise HTTPException(status_code=400, detail="File must be a .ovsvoice or .omnivoice bundle")

    content = await file.read()
    try:
        parsed = pb.parse_persona_bundle(content)
    except pb.BundleError as e:
        raise HTTPException(status_code=e.status, detail=e.detail)

    persona = parsed.manifest.get("persona") or {}
    written: list[str] = []

    def _gen_id() -> str:
        return str(uuid.uuid4())[:8]

    profile_id = _gen_id()
    try:
        # ── Audio members → server-named files (never the member name). ──
        ref_filename = None
        locked_filename = None
        if "ref_audio" in parsed.members:
            ref_filename = f"{profile_id}{parsed.member_ext('ref_audio')}"
            dest = _voices_dest(ref_filename)
            parsed.extract_member("ref_audio", dest); written.append(dest)
        if "locked_audio" in parsed.members:
            locked_filename = f"{profile_id}_locked{parsed.member_ext('locked_audio')}"
            dest = _voices_dest(locked_filename)
            parsed.extract_member("locked_audio", dest); written.append(dest)
        # Preview-only bundle (A12/B8): use the preview as the usable ref clip.
        if ref_filename is None and locked_filename is None and "preview" in parsed.members:
            ref_filename = f"{profile_id}{parsed.member_ext('preview')}"
            dest = _voices_dest(ref_filename)
            parsed.extract_member("preview", dest); written.append(dest)
        if ref_filename is None and locked_filename is None:
            raise HTTPException(status_code=400, detail="bundle has no usable audio")

        # ── Consent recording (optional) ──
        consent_filename = None
        consent_path = None
        if "consent_audio" in parsed.members:
            consent_filename = f"{profile_id}_consent{parsed.member_ext('consent_audio')}"
            consent_path = _voices_dest(consent_filename)
            parsed.extract_member("consent_audio", consent_path); written.append(consent_path)

        verified = _consent_verified(parsed, consent_path)
        consent_text = ((parsed.consent or {}).get("consent_text") or "").strip()
        recorded_at = None
        if verified:
            try:
                recorded_at = float(parsed.consent.get("recorded_at"))
            except (TypeError, ValueError):
                recorded_at = time.time()

        is_locked = bool(persona.get("is_locked") and locked_filename)
        ref_for_db = ref_filename or locked_filename  # at least one is set

        def _insert(pid: str):
            with db_conn() as conn:
                conn.execute(
                    """INSERT INTO voice_profiles
                       (id, name, ref_audio_path, ref_text, instruct, language,
                        seed, personality, is_locked, locked_audio_path, created_at,
                        kind, vd_states,
                        verified_own_voice, consent_text, consent_audio_path, consent_recorded_at)
                       VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)""",
                    (
                        pid,
                        persona.get("name") or "Imported Voice",
                        ref_for_db,
                        persona.get("ref_text", ""),
                        persona.get("instruct", ""),
                        persona.get("language", "Auto"),
                        persona.get("seed"),
                        persona.get("personality", ""),
                        1 if is_locked else 0,
                        locked_filename or "",
                        time.time(),
                        persona.get("kind") or "clone",
                        persona.get("vd_states"),
                        1 if verified else 0,
                        # Keep the attestation text so the user can re-attest locally,
                        # even when imported unverified.
                        consent_text,
                        consent_filename if verified else "",
                        recorded_at if verified else None,
                    ),
                )

        import sqlite3
        try:
            _insert(profile_id)
        except sqlite3.IntegrityError:
            profile_id = _gen_id()  # one retry on id collision (B20)
            # rename the on-disk files to the new id so they still match the row
            written = _rename_for_new_id(written, profile_id)
            ref_for_db = _retarget(ref_for_db, profile_id)
            locked_filename = _retarget(locked_filename, profile_id)
            consent_filename = _retarget(consent_filename, profile_id)
            _insert(profile_id)

    except HTTPException:
        _cleanup(written)
        raise
    except Exception:
        _cleanup(written)
        logger.exception("persona import failed")
        raise HTTPException(status_code=500, detail="Import failed; no files were kept.")

    event_bus.emit("profiles", {"action": "created", "id": profile_id})
    logger.info("Imported persona %r as %s (verified=%s)", persona.get("name"), profile_id, verified)

    return {
        "success": True,
        "profile_id": profile_id,
        "name": persona.get("name") or "Imported Voice",
        "kind": persona.get("kind") or "clone",
        "verified_own_voice": verified,
        "preview_only": parsed.preview_only,
        "license_spdx": parsed.license_spdx,
        "watermarked_preview": parsed.watermarked_preview,
        "source_bundle": file.filename,
        "schema_version_ahead": parsed.schema_version_ahead,
    }


def _cleanup(paths: list[str]) -> None:
    for p in paths:
        try:
            if p and os.path.exists(p):
                os.remove(p)
        except OSError:
            pass


def _rename_for_new_id(written: list[str], new_id: str) -> list[str]:
    """After an id-collision retry, rename each written file to carry the new id
    (filenames are `{old_id}…`; swap the leading 8-char stem)."""
    out = []
    for p in written:
        d, base = os.path.split(p)
        # base looks like {id}{ext} | {id}_locked{ext} | {id}_consent{ext}
        new_base = new_id + base[8:]
        new_path = os.path.join(d, new_base)
        try:
            os.replace(p, new_path)
            out.append(new_path)
        except OSError:
            out.append(p)
    return out


def _retarget(filename: str | None, new_id: str) -> str | None:
    return new_id + filename[8:] if filename else filename


# ── Inspect (no-write preview) ──────────────────────────────────────────────


@router.post("/personas/inspect")
async def inspect_persona(file: UploadFile = File(...)):
    """Read a bundle's manifest + consent summary WITHOUT writing any file or row."""
    name = (file.filename or "").lower()
    if not name.endswith(".ovsvoice") and not name.endswith(".omnivoice"):
        raise HTTPException(status_code=400, detail="File must be a .ovsvoice or .omnivoice bundle")
    content = await file.read()
    try:
        parsed = pb.parse_persona_bundle(content)
    except pb.BundleError as e:
        raise HTTPException(status_code=e.status, detail=e.detail)

    persona = parsed.manifest.get("persona") or {}
    consent_summary = None
    if parsed.consent:
        has_recording = "consent_audio" in parsed.members
        consent_summary = {
            "verified_claimed": bool(parsed.consent.get("verified_own_voice")),
            "method": parsed.consent.get("method", ""),
            "has_recording": has_recording,
            # would_verify mirrors import's gate, minus the byte-floor check
            # (inspect never extracts to measure size — advisory only).
            "would_verify": has_recording and bool((parsed.consent.get("consent_text") or "").strip()),
        }

    return {
        "format": "omnivoice-legacy" if parsed.is_legacy else pb.OVSVOICE_FORMAT,
        "schema_version": parsed.manifest.get("schema_version", pb.OVSVOICE_SCHEMA_VERSION),
        "name": persona.get("name") or "Imported Voice",
        "kind": persona.get("kind") or "clone",
        "language": persona.get("language", "Auto"),
        "personality": persona.get("personality", ""),
        "is_locked": bool(persona.get("is_locked")),
        "license_spdx": parsed.license_spdx,
        "tags": parsed.manifest.get("tags") or [],
        "preview_only": parsed.preview_only,
        "watermarked_preview": parsed.watermarked_preview,
        "consent": consent_summary,
        "schema_version_ahead": parsed.schema_version_ahead,
    }