"""P2-specific dashboard routes (mounted at /api/p2 by app_p2.py).

Same first-class settings as P1 (REUSE Sanad's canonical logic, no fork) — the
one thing the base routes don't do is apply a change to the LIVE Gemini session
immediately by restarting the voice subprocess (the child reads the API key +
persona at spawn time). P2 is a superset of P1, so these are identical to P1's
convenience routes; the premium features (live-voice, wake-phrases, motion,
skills, mask) are served by the vendored Sanad routers mounted alongside.

  /api/p2/api-key   GET masked status | POST set/update + live-restart
  /api/p2/persona   GET current persona+rules | POST update persona + live-restart
  /api/p2/say       speak a typed line (local, or via bus/hwbroker if SANAD_BUS_ADDR)
  /api/p2/logs/delete   delete all logs
  /api/p2/settings  one-shot view (api-key + persona + language + audio + live)

Kept Python-3.8 compatible.
"""
from __future__ import annotations

import asyncio
import base64
import os

from fastapi import APIRouter, HTTPException

from Project.Sanad.core.logger import get_logger
from Project.Sanad.dashboard.routes import voice as _voice          # reuse api-key logic
from Project.Sanad.dashboard.routes import prompt as _prompt        # reuse persona logic
from Project.Sanad.dashboard.routes import typed_replay as _tr      # reuse local TTS say
from sanad_pkg.bus import bus

# Bind request models as module-level names so FastAPI resolves body annotations
# cleanly under `from __future__ import annotations`.
ApiKeyPayload = _voice.ApiKeyPayload
PromptUpdate = _prompt.PromptUpdate
SayPayload = _tr.SayPayload

log = get_logger("pkg2.routes")
router = APIRouter()


async def _restart_live_if_running() -> bool:
    """Restart the live Gemini subprocess (if running) so a new key/persona takes
    effect immediately. Returns True if it was restarted."""
    try:
        from Project.Sanad.main import live_sub
        is_running = getattr(live_sub, "is_running", None)
        if live_sub is None or not callable(is_running) or not is_running():
            return False
        try:
            live_sub.stop()
        except Exception:
            log.exception("live_sub.stop() failed")
        try:
            await asyncio.to_thread(live_sub.start)
            return True
        except Exception:
            log.exception("live_sub.start() failed")
            return False
    except Exception:
        log.exception("could not restart live subprocess")
        return False


# ─────────────────────────── Gemini API key ───────────────────────────
def _persist_and_hotswap_key(key: str) -> None:
    """Persist gemini.api_key to data/motions/config.json (empty => remove) and
    hot-swap the in-memory globals. Patches BOTH Project.Sanad.config and
    gemini.client (each binds its own ref)."""
    from Project.Sanad.config import load_config, save_config
    import Project.Sanad.config as _cfg_mod
    cfg = load_config() or {}
    g = cfg.get("gemini") if isinstance(cfg.get("gemini"), dict) else {}
    if key:
        g["api_key"] = key
    else:
        g.pop("api_key", None)
    cfg["gemini"] = g
    save_config(cfg)
    _cfg_mod.GEMINI_API_KEY = key
    try:
        import Project.Sanad.gemini.client as _gc
        _gc.GEMINI_API_KEY = key
    except Exception:
        log.exception("could not patch gemini.client.GEMINI_API_KEY")


async def _disconnect_voice():
    try:
        from Project.Sanad.main import voice_client
        if voice_client is not None and getattr(voice_client, "connected", False):
            await voice_client.disconnect()
    except Exception:
        log.exception("voice_client disconnect failed")


@router.get("/api-key")
async def p2_get_api_key():
    """Masked current key + where it came from (delegates to the voice route)."""
    return await _voice.get_api_key()


@router.post("/api-key")
async def p2_set_api_key(payload: ApiKeyPayload):
    """ADD / update the Gemini API key. Relaxed validation — accepts AIza… and
    AQ.… / ephemeral tokens. Persists + hot-swaps + restarts the live session."""
    key = (payload.api_key or "").strip()
    if len(key) < 10:
        raise HTTPException(400, "API key looks too short (paste the full key).")
    _persist_and_hotswap_key(key)
    await _disconnect_voice()
    restarted = await _restart_live_if_running()
    return {
        "ok": True,
        "masked": _voice._mask_api_key(key),
        "source": "config_file",
        "live_subprocess_restarted": restarted,
        "message": "API key added" + (" and applied (live session restarted)."
                                       if restarted else " — start the session to use it."),
    }


@router.post("/api-key/delete")
async def p2_delete_api_key():
    """DELETE the Gemini API key — clears it from data/motions/config.json and
    in-memory. Conversation stops until a new key is added."""
    _persist_and_hotswap_key("")
    await _disconnect_voice()
    restarted = await _restart_live_if_running()
    return {
        "ok": True,
        "deleted": True,
        "live_subprocess_restarted": restarted,
        "message": "API key deleted. Add a new key to re-enable conversation.",
    }


# ─────────────────────────── Robot persona ───────────────────────────
@router.get("/persona")
async def p2_get_persona():
    """Current persona system prompt + parsed rules + file paths."""
    return await _prompt.get_prompt()


@router.post("/persona")
async def p2_set_persona(payload: PromptUpdate):
    """Change the robot persona — write scripts/sanad_script.txt (canonical prompt
    logic) and restart the live session so it speaks with the new persona
    immediately. The persona is also where you steer language/dialect (P2 = the
    bilingual multilingual prompt by default)."""
    result = await _prompt.update_prompt(payload)
    restarted = await _restart_live_if_running()
    result["live_subprocess_restarted"] = restarted
    result["message"] = (
        "Persona saved and applied — live session restarted."
        if restarted else
        "Persona saved. Start (or restart) the live session to use the new persona."
    )
    return result


# ─────────────────────────── say a line ───────────────────────────
@router.post("/say")
async def p2_say(payload: SayPayload):
    """Speak a typed line. Standalone (no bus) → play locally via Sanad's
    typed-replay. Multi-package (SANAD_BUS_ADDR set) → synth via Gemini and hand
    the PCM to the hwbroker `speak.request` (audio-lock)."""
    text = (payload.text or "").strip()
    if not text:
        raise HTTPException(400, "text cannot be empty")

    if not os.environ.get("SANAD_BUS_ADDR"):
        return await _tr.say(payload)

    from Project.Sanad.main import voice_client
    if voice_client is None:
        raise HTTPException(503, "voice client unavailable")
    if not getattr(voice_client, "connected", False):
        try:
            await voice_client.connect()
        except Exception as exc:
            raise HTTPException(503, "Gemini connect failed: %s" % exc)
    try:
        audio, _parts = await voice_client.send_text(text, owner="p2_say")
    except Exception as exc:
        raise HTTPException(502, "Gemini error: %s" % exc)
    if not audio:
        return {"ok": False, "routed": "hwbroker", "reason": "no audio produced"}
    bus.emit_sync("speak.request", owner="p2",
                  pcm_b64=base64.b64encode(audio).decode("ascii"),
                  rate=24000, channels=1, sampwidth=2)
    return {"ok": True, "routed": "hwbroker (audio-lock)"}


# ─────────────────────────── logs ───────────────────────────
@router.post("/logs/delete")
async def p2_delete_logs():
    """Delete all log files on the robot. Active .log files are truncated; rotated/
    snapshot/bundle files are removed."""
    from Project.Sanad.config import LOGS_DIR
    cleared = []
    try:
        for p in sorted(LOGS_DIR.glob("*.log*")):
            try:
                if p.name.endswith(".log") and "_snapshot_" not in p.name:
                    open(p, "w").close()
                else:
                    p.unlink()
                cleared.append(p.name)
            except Exception:
                log.exception("could not clear log %s", p.name)
    except Exception:
        log.exception("delete logs failed")
    return {"ok": True, "count": len(cleared), "cleared": cleared}


# ─────────────────────────── combined view ───────────────────────────
@router.get("/settings")
async def p2_settings():
    """One-shot P2 settings: api-key status + persona + language + audio + live + mask."""
    key_status = await _voice.get_api_key()
    persona = ""
    try:
        persona = _prompt._load_system_prompt()
    except Exception:
        log.exception("could not load persona")
    live_running = False
    try:
        from Project.Sanad.main import live_sub
        is_running = getattr(live_sub, "is_running", None)
        live_running = bool(live_sub is not None and callable(is_running) and is_running())
    except Exception:
        pass
    mask_status = None
    try:
        from Project.Sanad.main import mask_face
        if mask_face is not None and hasattr(mask_face, "status"):
            mask_status = mask_face.status()
    except Exception:
        pass
    return {
        "package": "P2",
        "api_key": key_status,
        "persona_preview": (persona[:400] + ("…" if len(persona) > 400 else "")),
        "persona_chars": len(persona),
        "language": os.environ.get("SANAD_LANGUAGE", "") or "(multilingual auto-detect)",
        "audio_profile": os.environ.get("SANAD_AUDIO_PROFILE", "builtin"),
        "live_running": live_running,
        "mask": mask_status,
    }