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

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

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.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 _stream_text(self, text: str):
        """Stream pre-formed text to the client as deltas, simulating LLM output."""
        # Send in chunks to feel natural
        chunk_size = 12
        for i in range(0, len(text), chunk_size):
            chunk = text[i:i + chunk_size]
            await self.ws.send_text(json.dumps({"type": "delta", "content": chunk}))
        await self.ws.send_text(json.dumps({"type": "done"}))

    async def handle_action(self, action: str, data: dict = None):
        """Handle a structured UI action (button click etc.)."""
        # Format as a structured message that Thinker can parse
        action_desc = f"ACTION: {action}"
        if data:
            action_desc += f" | data: {json.dumps(data)}"
        # Add to history as a system-level event, not user speech
        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 node — this isn't speech to perceive, 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)

        if thought.controls:
            await self.ws.send_text(json.dumps({"type": "controls", "controls": thought.controls}))

        response = await self.output_node.process(thought, self.history, self.ws, memory_context=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)

        # Send controls inline (before response text)
        if thought.controls:
            await self.ws.send_text(json.dumps({"type": "controls", "controls": thought.controls}))

        # Output renders Thinker's reasoning into device-appropriate response
        response = await self.output_node.process(thought, self.history, self.ws, memory_context=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:]