"""Runtime: wires all nodes together into a processing pipeline."""

import asyncio
import json
import logging
import time
from pathlib import Path
from typing import Callable

from fastapi import WebSocket

from .types import Envelope, Command
from .process import ProcessManager
from .nodes import SensorNode, InputNode, OutputNode, ThinkerNode, MemorizerNode, UINode

log = logging.getLogger("runtime")

TRACE_FILE = Path(__file__).parent.parent / "trace.jsonl"


class Runtime:
    def __init__(self, ws: WebSocket, user_claims: dict = None, origin: str = "",
                 broadcast: Callable = None):
        self.ws = ws
        self.history: list[dict] = []
        self.MAX_HISTORY = 40
        self._broadcast = broadcast or (lambda e: None)

        self.input_node = InputNode(send_hud=self._send_hud)
        self.process_manager = ProcessManager(send_hud=self._send_hud)
        self.thinker = ThinkerNode(send_hud=self._send_hud, process_manager=self.process_manager)
        self.output_node = OutputNode(send_hud=self._send_hud)
        self.ui_node = UINode(send_hud=self._send_hud)
        self.memorizer = MemorizerNode(send_hud=self._send_hud)
        self.sensor = SensorNode(send_hud=self._send_hud)
        self.sensor.start(get_memo_state=lambda: self.memorizer.state)

        claims = user_claims or {}
        log.info(f"[runtime] user_claims: {claims}")
        self.identity = claims.get("name") or claims.get("preferred_username") or claims.get("username") or "unknown"
        log.info(f"[runtime] resolved identity: {self.identity}")
        self.channel = origin or "unknown"

        self.memorizer.state["user_name"] = self.identity
        self.memorizer.state["situation"] = f"authenticated on {self.channel}" if origin else "local session"

    async def _send_hud(self, data: dict):
        await self.ws.send_text(json.dumps({"type": "hud", **data}))
        trace_entry = {"ts": time.strftime("%Y-%m-%d %H:%M:%S.") + f"{time.time() % 1:.3f}"[2:], **data}
        try:
            with open(TRACE_FILE, "a", encoding="utf-8") as f:
                f.write(json.dumps(trace_entry, ensure_ascii=False) + "\n")
            if TRACE_FILE.exists() and TRACE_FILE.stat().st_size > 500_000:
                lines = TRACE_FILE.read_text(encoding="utf-8").strip().split("\n")
                TRACE_FILE.write_text("\n".join(lines[-500:]) + "\n", encoding="utf-8")
        except Exception as e:
            log.error(f"trace write error: {e}")
        self._broadcast(trace_entry)

    async def _run_output_and_ui(self, thought, mem_ctx):
        """Run Output and UI nodes in parallel. Returns (response_text, controls)."""
        output_task = asyncio.create_task(
            self.output_node.process(thought, self.history, self.ws, memory_context=mem_ctx))
        ui_task = asyncio.create_task(
            self.ui_node.process(thought, self.history, memory_context=mem_ctx))

        # Output streams to WS, UI returns controls — both run concurrently
        response, controls = await asyncio.gather(output_task, ui_task)

        # Send controls after Output starts streaming (UI may finish first or after)
        if controls:
            await self.ws.send_text(json.dumps({"type": "controls", "controls": controls}))

        return response

    async def handle_action(self, action: str, data: dict = None):
        """Handle a structured UI action (button click etc.)."""
        action_desc = f"ACTION: {action}"
        if data:
            action_desc += f" | data: {json.dumps(data)}"
        self.history.append({"role": "user", "content": action_desc})
        self.sensor.note_user_activity()

        sensor_lines = self.sensor.get_context_lines()
        mem_ctx = self.memorizer.get_context_block(sensor_lines=sensor_lines)

        # Skip Input — this isn't speech, go straight to Thinker
        command = Command(instruction=f"User clicked UI button: {action}", source_text=action_desc)
        thought = await self.thinker.process(command, self.history, memory_context=mem_ctx)

        response = await self._run_output_and_ui(thought, mem_ctx)
        self.history.append({"role": "assistant", "content": response})

        await self.memorizer.update(self.history)

        if len(self.history) > self.MAX_HISTORY:
            self.history = self.history[-self.MAX_HISTORY:]

    async def handle_message(self, text: str):
        envelope = Envelope(
            text=text,
            user_id="nico",
            session_id="test",
            timestamp=time.strftime("%Y-%m-%d %H:%M:%S"),
        )

        self.sensor.note_user_activity()
        self.history.append({"role": "user", "content": text})

        sensor_lines = self.sensor.get_context_lines()
        mem_ctx = self.memorizer.get_context_block(sensor_lines=sensor_lines)

        command = await self.input_node.process(
            envelope, self.history, memory_context=mem_ctx,
            identity=self.identity, channel=self.channel)

        thought = await self.thinker.process(command, self.history, memory_context=mem_ctx)

        # Output (voice) and UI (screen) run in parallel
        response = await self._run_output_and_ui(thought, mem_ctx)

        self.history.append({"role": "assistant", "content": response})

        await self.memorizer.update(self.history)

        if len(self.history) > self.MAX_HISTORY:
            self.history = self.history[-self.MAX_HISTORY:]