"""Optimized dashboard app with improved async handling and non-blocking startup.

Key improvements:
1. Background tasks use asyncio.create_task() to avoid blocking startup
2. Chat integrations start in background
3. All startup operations complete quickly
4. Security and logging handled by dedicated middleware
"""

import asyncio
import logging
from contextlib import asynccontextmanager
from pathlib import Path

from fastapi import FastAPI, Request, WebSocket
from fastapi.middleware.cors import CORSMiddleware
from fastapi.middleware.trustedhost import TrustedHostMiddleware
from fastapi.responses import HTMLResponse
from fastapi.staticfiles import StaticFiles

from config import settings

# Import dedicated middleware
from dashboard.middleware.csrf import CSRFMiddleware
from dashboard.middleware.request_logging import RequestLoggingMiddleware
from dashboard.middleware.security_headers import SecurityHeadersMiddleware
from dashboard.routes.agents import router as agents_router
from dashboard.routes.briefing import router as briefing_router
from dashboard.routes.calm import router as calm_router
from dashboard.routes.chat_api import router as chat_api_router
from dashboard.routes.chat_api_v1 import router as chat_api_v1_router
from dashboard.routes.db_explorer import router as db_explorer_router
from dashboard.routes.discord import router as discord_router
from dashboard.routes.experiments import router as experiments_router
from dashboard.routes.grok import router as grok_router
from dashboard.routes.health import router as health_router
from dashboard.routes.loop_qa import router as loop_qa_router
from dashboard.routes.memory import router as memory_router
from dashboard.routes.mobile import router as mobile_router
from dashboard.routes.models import api_router as models_api_router
from dashboard.routes.models import router as models_router
from dashboard.routes.spark import router as spark_router
from dashboard.routes.system import router as system_router
from dashboard.routes.tasks import router as tasks_router
from dashboard.routes.telegram import router as telegram_router
from dashboard.routes.thinking import router as thinking_router
from dashboard.routes.tools import router as tools_router
from dashboard.routes.voice import router as voice_router
from dashboard.routes.work_orders import router as work_orders_router


class _ColorFormatter(logging.Formatter):
    """ANSI color formatter — red is reserved for ERROR/CRITICAL only."""

    RESET = "\033[0m"
    COLORS = {
        logging.DEBUG: "\033[37m",  # white/gray
        logging.INFO: "\033[32m",  # green
        logging.WARNING: "\033[33m",  # yellow
        logging.ERROR: "\033[31m",  # red
        logging.CRITICAL: "\033[1;31m",  # bold red
    }

    def format(self, record: logging.LogRecord) -> str:
        color = self.COLORS.get(record.levelno, self.RESET)
        formatted = super().format(record)
        return f"{color}{formatted}{self.RESET}"


def _configure_logging() -> None:
    """Configure logging with console and optional rotating file handler."""
    root_logger = logging.getLogger()
    root_logger.setLevel(logging.INFO)

    console = logging.StreamHandler()
    console.setLevel(logging.INFO)
    console.setFormatter(
        _ColorFormatter(
            "%(asctime)s %(levelname)-8s %(name)s — %(message)s",
            datefmt="%H:%M:%S",
        )
    )
    root_logger.addHandler(console)

    # Override uvicorn's default colored formatter so all console output
    # uses our color scheme (red = ERROR/CRITICAL only).
    for name in ("uvicorn", "uvicorn.error", "uvicorn.access"):
        uv_logger = logging.getLogger(name)
        uv_logger.handlers.clear()
        uv_logger.propagate = True

    if settings.error_log_enabled:
        from logging.handlers import RotatingFileHandler

        log_dir = Path(settings.repo_root) / settings.error_log_dir
        log_dir.mkdir(parents=True, exist_ok=True)
        error_file = log_dir / "errors.log"

        file_handler = RotatingFileHandler(
            error_file,
            maxBytes=settings.error_log_max_bytes,
            backupCount=settings.error_log_backup_count,
        )
        file_handler.setLevel(logging.ERROR)
        file_handler.setFormatter(
            logging.Formatter(
                "%(asctime)s %(levelname)-8s %(name)s — %(message)s\n"
                "  File: %(pathname)s:%(lineno)d\n"
                "  Function: %(funcName)s",
                datefmt="%Y-%m-%d %H:%M:%S",
            )
        )
        root_logger.addHandler(file_handler)


_configure_logging()
logger = logging.getLogger(__name__)

BASE_DIR = Path(__file__).parent
PROJECT_ROOT = BASE_DIR.parent.parent

_BRIEFING_INTERVAL_HOURS = 6


async def _briefing_scheduler() -> None:
    """Background task: regenerate Timmy's briefing every 6 hours."""
    from infrastructure.notifications.push import notify_briefing_ready
    from timmy.briefing import engine as briefing_engine

    await asyncio.sleep(2)

    while True:
        try:
            if briefing_engine.needs_refresh():
                logger.info("Generating morning briefing…")
                briefing = briefing_engine.generate()
                await notify_briefing_ready(briefing)
            else:
                logger.info("Briefing is fresh; skipping generation.")
        except Exception as exc:
            logger.error("Briefing scheduler error: %s", exc)

        await asyncio.sleep(_BRIEFING_INTERVAL_HOURS * 3600)


async def _thinking_scheduler() -> None:
    """Background task: execute Timmy's thinking cycle every N seconds."""
    from timmy.thinking import thinking_engine

    await asyncio.sleep(5)  # Stagger after briefing scheduler

    while True:
        try:
            if settings.thinking_enabled:
                await thinking_engine.think_once()
        except Exception as exc:
            logger.error("Thinking scheduler error: %s", exc)

        await asyncio.sleep(settings.thinking_interval_seconds)


async def _loop_qa_scheduler() -> None:
    """Background task: run capability self-tests on a separate timer.

    Independent of the thinking loop — runs every N thinking ticks
    to probe subsystems and detect degradation.
    """
    from timmy.loop_qa import loop_qa_orchestrator

    await asyncio.sleep(10)  # Stagger after thinking scheduler

    while True:
        try:
            if settings.loop_qa_enabled:
                result = await loop_qa_orchestrator.run_next_test()
                if result:
                    status = "PASS" if result["success"] else "FAIL"
                    logger.info(
                        "Loop QA [%s]: %s — %s",
                        result["capability"],
                        status,
                        result.get("details", "")[:80],
                    )
        except Exception as exc:
            logger.error("Loop QA scheduler error: %s", exc)

        interval = settings.thinking_interval_seconds * settings.loop_qa_interval_ticks
        await asyncio.sleep(interval)


async def _start_chat_integrations_background() -> None:
    """Background task: start chat integrations without blocking startup."""
    from integrations.chat_bridge.registry import platform_registry
    from integrations.chat_bridge.vendors.discord import discord_bot
    from integrations.telegram_bot.bot import telegram_bot

    await asyncio.sleep(0.5)

    # Register Discord in the platform registry
    platform_registry.register(discord_bot)

    if settings.telegram_token:
        try:
            await telegram_bot.start()
            logger.info("Telegram bot started")
        except Exception as exc:
            logger.warning("Failed to start Telegram bot: %s", exc)
    else:
        logger.debug("Telegram: no token configured, skipping")

    if settings.discord_token or discord_bot.load_token():
        try:
            await discord_bot.start()
            logger.info("Discord bot started")
        except Exception as exc:
            logger.warning("Failed to start Discord bot: %s", exc)
    else:
        logger.debug("Discord: no token configured, skipping")

    # If Discord isn't connected yet, start a watcher that polls for the
    # token to appear in the environment or .env file.
    if discord_bot.state.name != "CONNECTED":
        asyncio.create_task(_discord_token_watcher())


async def _discord_token_watcher() -> None:
    """Poll for DISCORD_TOKEN appearing in env or .env and auto-start Discord bot."""
    from integrations.chat_bridge.vendors.discord import discord_bot

    # Don't poll if discord.py isn't even installed
    try:
        import discord as _discord_check  # noqa: F401
    except ImportError:
        logger.debug("discord.py not installed — token watcher exiting")
        return

    while True:
        await asyncio.sleep(30)

        if discord_bot.state.name == "CONNECTED":
            return  # Already running — stop watching

        # 1. Check settings (pydantic-settings reads env on instantiation;
        #    hot-reload is handled by re-reading .env below)
        token = settings.discord_token

        # 2. Re-read .env file for hot-reload
        if not token:
            try:
                from dotenv import dotenv_values

                env_path = Path(settings.repo_root) / ".env"
                if env_path.exists():
                    vals = dotenv_values(env_path)
                    token = vals.get("DISCORD_TOKEN", "")
            except ImportError:
                pass  # python-dotenv not installed

        # 3. Check state file (written by /discord/setup)
        if not token:
            token = discord_bot.load_token() or ""

        if token:
            try:
                logger.info(
                    "Discord watcher: token found, attempting start (state=%s)",
                    discord_bot.state.name,
                )
                success = await discord_bot.start(token=token)
                if success:
                    logger.info("Discord bot auto-started (token detected)")
                    return  # Done — stop watching
                logger.warning(
                    "Discord watcher: start() returned False (state=%s)",
                    discord_bot.state.name,
                )
            except Exception as exc:
                logger.warning("Discord auto-start failed: %s", exc)


@asynccontextmanager
async def lifespan(app: FastAPI):
    """Application lifespan manager with non-blocking startup."""

    # Validate security config (no-op in test mode)
    from config import validate_startup

    validate_startup()

    # Enable event persistence (unified EventBus + swarm event_log)
    from infrastructure.events.bus import init_event_bus_persistence

    init_event_bus_persistence()

    # Create all background tasks without waiting for them
    briefing_task = asyncio.create_task(_briefing_scheduler())
    thinking_task = asyncio.create_task(_thinking_scheduler())
    loop_qa_task = asyncio.create_task(_loop_qa_scheduler())

    # Initialize Spark Intelligence engine
    from spark.engine import get_spark_engine

    if get_spark_engine().enabled:
        logger.info("Spark Intelligence active — event capture enabled")

    # Auto-prune old vector store memories on startup
    if settings.memory_prune_days > 0:
        try:
            from timmy.memory_system import prune_memories

            pruned = prune_memories(
                older_than_days=settings.memory_prune_days,
                keep_facts=settings.memory_prune_keep_facts,
            )
            if pruned:
                logger.info(
                    "Memory auto-prune: removed %d entries older than %d days",
                    pruned,
                    settings.memory_prune_days,
                )
        except Exception as exc:
            logger.debug("Memory auto-prune skipped: %s", exc)

    # Auto-prune old thoughts on startup
    if settings.thoughts_prune_days > 0:
        try:
            from timmy.thinking import thinking_engine

            pruned = thinking_engine.prune_old_thoughts(
                keep_days=settings.thoughts_prune_days,
                keep_min=settings.thoughts_prune_keep_min,
            )
            if pruned:
                logger.info(
                    "Thought auto-prune: removed %d entries older than %d days",
                    pruned,
                    settings.thoughts_prune_days,
                )
        except Exception as exc:
            logger.debug("Thought auto-prune skipped: %s", exc)

    # Auto-prune old system events on startup
    if settings.events_prune_days > 0:
        try:
            from swarm.event_log import prune_old_events

            pruned = prune_old_events(
                keep_days=settings.events_prune_days,
                keep_min=settings.events_prune_keep_min,
            )
            if pruned:
                logger.info(
                    "Event auto-prune: removed %d entries older than %d days",
                    pruned,
                    settings.events_prune_days,
                )
        except Exception as exc:
            logger.debug("Event auto-prune skipped: %s", exc)

    # Warn if memory vault exceeds size limit
    if settings.memory_vault_max_mb > 0:
        try:
            vault_path = Path(settings.repo_root) / "memory" / "notes"
            if vault_path.exists():
                total_bytes = sum(f.stat().st_size for f in vault_path.rglob("*") if f.is_file())
                total_mb = total_bytes / (1024 * 1024)
                if total_mb > settings.memory_vault_max_mb:
                    logger.warning(
                        "Memory vault (%.1f MB) exceeds limit (%d MB) — consider archiving old notes",
                        total_mb,
                        settings.memory_vault_max_mb,
                    )
        except Exception as exc:
            logger.debug("Vault size check skipped: %s", exc)

    # Start Workshop presence heartbeat
    from timmy.workshop_state import WorkshopHeartbeat

    workshop_heartbeat = WorkshopHeartbeat()
    await workshop_heartbeat.start()

    # Start chat integrations in background
    chat_task = asyncio.create_task(_start_chat_integrations_background())

    # Register session logger with error capture (breaks infrastructure → timmy circular dep)
    try:
        from infrastructure.error_capture import register_error_recorder
        from timmy.session_logger import get_session_logger

        register_error_recorder(get_session_logger().record_error)
    except Exception:
        pass

    logger.info("✓ Dashboard ready for requests")

    yield

    # Cleanup on shutdown
    from integrations.chat_bridge.vendors.discord import discord_bot
    from integrations.telegram_bot.bot import telegram_bot

    await discord_bot.stop()
    await telegram_bot.stop()

    # Close MCP tool server sessions
    try:
        from timmy.mcp_tools import close_mcp_sessions

        await close_mcp_sessions()
    except Exception as exc:
        logger.debug("MCP shutdown: %s", exc)

    await workshop_heartbeat.stop()

    for task in [briefing_task, thinking_task, chat_task, loop_qa_task]:
        if task:
            task.cancel()
            try:
                await task
            except asyncio.CancelledError:
                pass


app = FastAPI(
    title="Mission Control",
    version="1.0.0",
    lifespan=lifespan,
    docs_url="/docs",
    openapi_url="/openapi.json",
)


def _get_cors_origins() -> list[str]:
    """Get CORS origins from settings, with sensible defaults."""
    origins = settings.cors_origins
    if settings.debug and origins == ["*"]:
        return [
            "http://localhost:3000",
            "http://localhost:8000",
            "http://127.0.0.1:3000",
            "http://127.0.0.1:8000",
        ]
    return origins


# Add dedicated middleware in correct order
# 1. Logging (outermost to capture everything)
app.add_middleware(RequestLoggingMiddleware, skip_paths=["/health"])

# 2. Security Headers
app.add_middleware(SecurityHeadersMiddleware, production=not settings.debug)

# 3. CSRF Protection
app.add_middleware(CSRFMiddleware)

# 4. Standard FastAPI middleware
# In development, allow all hosts (Tailscale IPs, MagicDNS, etc.)
_trusted = settings.trusted_hosts if settings.timmy_env == "production" else ["*"]
app.add_middleware(
    TrustedHostMiddleware,
    allowed_hosts=_trusted,
)

app.add_middleware(
    CORSMiddleware,
    allow_origins=_get_cors_origins(),
    allow_credentials=True,
    allow_methods=["GET", "POST", "PUT", "DELETE", "OPTIONS"],
    allow_headers=["Content-Type", "Authorization"],
)

# Mount static files
static_dir = PROJECT_ROOT / "static"
if static_dir.exists():
    app.mount("/static", StaticFiles(directory=str(static_dir)), name="static")

# Shared templates instance
from dashboard.templating import templates  # noqa: E402

# Include routers
app.include_router(health_router)
app.include_router(agents_router)
app.include_router(voice_router)
app.include_router(mobile_router)
app.include_router(briefing_router)
app.include_router(telegram_router)
app.include_router(tools_router)
app.include_router(spark_router)
app.include_router(discord_router)
app.include_router(memory_router)
app.include_router(grok_router)
app.include_router(models_router)
app.include_router(models_api_router)
app.include_router(chat_api_router)
app.include_router(chat_api_v1_router)
app.include_router(thinking_router)
app.include_router(calm_router)
app.include_router(tasks_router)
app.include_router(work_orders_router)
app.include_router(loop_qa_router)
app.include_router(system_router)
app.include_router(experiments_router)
app.include_router(db_explorer_router)


@app.websocket("/ws")
async def ws_redirect(websocket: WebSocket):
    """Catch stale /ws connections and close cleanly.

    websockets 16.0 dropped the legacy ``transfer_data_task`` attribute,
    so calling ``websocket.close()`` after accept triggers an
    AttributeError.  Use the raw ASGI send instead.
    """
    await websocket.accept()
    try:
        await websocket.close(code=1008, reason="Deprecated endpoint")
    except AttributeError:
        # websockets >= 16.0 — close via raw ASGI message
        await websocket.send({"type": "websocket.close", "code": 1008})


@app.websocket("/swarm/live")
async def swarm_live(websocket: WebSocket):
    """Swarm live event stream via WebSocket."""
    from infrastructure.ws_manager.handler import ws_manager as ws_mgr

    await ws_mgr.connect(websocket)
    try:
        while True:
            # Keep connection alive; events are pushed via ws_mgr.broadcast()
            await websocket.receive_text()
    except Exception as exc:
        logger.debug("WebSocket disconnect error: %s", exc)
        ws_mgr.disconnect(websocket)


@app.get("/swarm/agents/sidebar", response_class=HTMLResponse)
async def swarm_agents_sidebar():
    """HTMX partial: list active swarm agents for the dashboard sidebar."""
    try:
        from config import settings

        agents_yaml = settings.agents_config
        agents = agents_yaml.get("agents", {})
        lines = []
        for name, cfg in agents.items():
            model = cfg.get("model", "default")
            lines.append(
                f'<div class="mc-agent-row">'
                f'<span class="mc-agent-name">{name}</span>'
                f'<span class="mc-agent-model">{model}</span>'
                f"</div>"
            )
        return "\n".join(lines) if lines else '<div class="mc-muted">No agents configured</div>'
    except Exception as exc:
        logger.debug("Agents sidebar error: %s", exc)
        return '<div class="mc-muted">Agents unavailable</div>'


@app.get("/", response_class=HTMLResponse)
async def root(request: Request):
    """Serve the main dashboard page."""
    return templates.TemplateResponse(request, "index.html", {})


@app.get("/shortcuts/setup")
async def shortcuts_setup():
    """Siri Shortcuts setup guide."""
    from integrations.shortcuts.siri import get_setup_guide

    return get_setup_guide()