"""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 json
import logging
import re
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.rate_limit import RateLimitMiddleware
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.daily_run import router as daily_run_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.quests import router as quests_router
from dashboard.routes.scorecards import router as scorecards_router
from dashboard.routes.sovereignty_metrics import router as sovereignty_metrics_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.tower import router as tower_router
from dashboard.routes.voice import router as voice_router
from dashboard.routes.work_orders import router as work_orders_router
from dashboard.routes.world import matrix_router
from dashboard.routes.world import router as world_router
from timmy.workshop_state import PRESENCE_FILE


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 asyncio.wait_for(
                    thinking_engine.think_once(),
                    timeout=settings.thinking_timeout_seconds,
                )
        except TimeoutError:
            logger.warning(
                "Thinking cycle timed out after %ds — Ollama may be unresponsive",
                settings.thinking_timeout_seconds,
            )
        except asyncio.CancelledError:
            raise
        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 asyncio.wait_for(
                    loop_qa_orchestrator.run_next_test(),
                    timeout=settings.thinking_timeout_seconds,
                )
                if result:
                    status = "PASS" if result["success"] else "FAIL"
                    logger.info(
                        "Loop QA [%s]: %s — %s",
                        result["capability"],
                        status,
                        result.get("details", "")[:80],
                    )
        except TimeoutError:
            logger.warning(
                "Loop QA test timed out after %ds",
                settings.thinking_timeout_seconds,
            )
        except asyncio.CancelledError:
            raise
        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)


_PRESENCE_POLL_SECONDS = 30
_PRESENCE_INITIAL_DELAY = 3

_SYNTHESIZED_STATE: dict = {
    "version": 1,
    "liveness": None,
    "current_focus": "",
    "mood": "idle",
    "active_threads": [],
    "recent_events": [],
    "concerns": [],
}


async def _presence_watcher() -> None:
    """Background task: watch ~/.timmy/presence.json and broadcast changes via WS.

    Polls the file every 30 seconds (matching Timmy's write cadence).
    If the file doesn't exist, broadcasts a synthesised idle state.
    """
    from infrastructure.ws_manager.handler import ws_manager as ws_mgr

    await asyncio.sleep(_PRESENCE_INITIAL_DELAY)  # Stagger after other schedulers

    last_mtime: float = 0.0

    while True:
        try:
            if PRESENCE_FILE.exists():
                mtime = PRESENCE_FILE.stat().st_mtime
                if mtime != last_mtime:
                    last_mtime = mtime
                    raw = await asyncio.to_thread(PRESENCE_FILE.read_text)
                    state = json.loads(raw)
                    await ws_mgr.broadcast("timmy_state", state)
            else:
                # File absent — broadcast synthesised state once per cycle
                if last_mtime != -1.0:
                    last_mtime = -1.0
                    await ws_mgr.broadcast("timmy_state", _SYNTHESIZED_STATE)
        except json.JSONDecodeError as exc:
            logger.warning("presence.json parse error: %s", exc)
        except Exception as exc:
            logger.warning("Presence watcher error: %s", exc)

        await asyncio.sleep(_PRESENCE_POLL_SECONDS)


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)


def _startup_init() -> None:
    """Validate config and enable event persistence."""
    from config import validate_startup

    validate_startup()

    from infrastructure.events.bus import init_event_bus_persistence

    init_event_bus_persistence()

    from spark.engine import get_spark_engine

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


def _startup_background_tasks() -> list[asyncio.Task]:
    """Spawn all recurring background tasks (non-blocking)."""
    bg_tasks = [
        asyncio.create_task(_briefing_scheduler()),
        asyncio.create_task(_thinking_scheduler()),
        asyncio.create_task(_loop_qa_scheduler()),
        asyncio.create_task(_presence_watcher()),
        asyncio.create_task(_start_chat_integrations_background()),
    ]
    try:
        from timmy.paperclip import start_paperclip_poller
        bg_tasks.append(asyncio.create_task(start_paperclip_poller()))
        logger.info("Paperclip poller started")
    except ImportError:
        logger.debug("Paperclip module not found, skipping poller")
    
    return bg_tasks


def _try_prune(label: str, prune_fn, days: int) -> None:
    """Run a prune function, log results, swallow errors."""
    try:
        pruned = prune_fn()
        if pruned:
            logger.info(
                "%s auto-prune: removed %d entries older than %d days",
                label,
                pruned,
                days,
            )
    except Exception as exc:
        logger.debug("%s auto-prune skipped: %s", label, exc)


def _check_vault_size() -> None:
    """Warn if the memory vault exceeds the configured size limit."""
    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)


def _startup_pruning() -> None:
    """Auto-prune old memories, thoughts, and events on startup."""
    if settings.memory_prune_days > 0:
        from timmy.memory_system import prune_memories

        _try_prune(
            "Memory",
            lambda: prune_memories(
                older_than_days=settings.memory_prune_days,
                keep_facts=settings.memory_prune_keep_facts,
            ),
            settings.memory_prune_days,
        )

    if settings.thoughts_prune_days > 0:
        from timmy.thinking import thinking_engine

        _try_prune(
            "Thought",
            lambda: thinking_engine.prune_old_thoughts(
                keep_days=settings.thoughts_prune_days,
                keep_min=settings.thoughts_prune_keep_min,
            ),
            settings.thoughts_prune_days,
        )

    if settings.events_prune_days > 0:
        from swarm.event_log import prune_old_events

        _try_prune(
            "Event",
            lambda: prune_old_events(
                keep_days=settings.events_prune_days,
                keep_min=settings.events_prune_keep_min,
            ),
            settings.events_prune_days,
        )

    if settings.memory_vault_max_mb > 0:
        _check_vault_size()


async def _shutdown_cleanup(
    bg_tasks: list[asyncio.Task],
    workshop_heartbeat,
) -> None:
    """Stop chat bots, MCP sessions, heartbeat, and cancel background tasks."""
    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()

    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 bg_tasks:
        task.cancel()
        try:
            await task
        except asyncio.CancelledError:
            pass


@asynccontextmanager
async def lifespan(app: FastAPI):
    """Application lifespan manager with non-blocking startup."""
    _startup_init()
    bg_tasks = _startup_background_tasks()
    _startup_pruning()

    # Start Workshop presence heartbeat with WS relay
    from dashboard.routes.world import broadcast_world_state
    from timmy.workshop_state import WorkshopHeartbeat

    workshop_heartbeat = WorkshopHeartbeat(on_change=broadcast_world_state)
    await workshop_heartbeat.start()

    # Register session logger with error capture
    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:
        logger.debug("Failed to register error recorder")

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

    yield

    await _shutdown_cleanup(bg_tasks, workshop_heartbeat)


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, rejecting wildcards in production.

    Adds matrix_frontend_url when configured. Always allows Tailscale IPs
    (100.x.x.x range) for development convenience.
    """
    origins = list(settings.cors_origins)

    # Strip wildcards in production (security)
    if "*" in origins and not settings.debug:
        logger.warning(
            "Wildcard '*' in CORS_ORIGINS stripped in production — "
            "set explicit origins via CORS_ORIGINS env var"
        )
        origins = [o for o in origins if o != "*"]

    # Add Matrix frontend URL if configured
    if settings.matrix_frontend_url:
        url = settings.matrix_frontend_url.strip()
        if url and url not in origins:
            origins.append(url)
            logger.debug("Added Matrix frontend to CORS: %s", url)

    return origins


# Pattern to match Tailscale IPs (100.x.x.x) for CORS origin regex
_TAILSCALE_IP_PATTERN = re.compile(r"^https?://100\.\d{1,3}\.\d{1,3}\.\d{1,3}(?::\d+)?$")


def _is_tailscale_origin(origin: str) -> bool:
    """Check if origin is a Tailscale IP (100.x.x.x range)."""
    return bool(_TAILSCALE_IP_PATTERN.match(origin))


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

# 2. Rate Limiting (before security to prevent abuse early)
app.add_middleware(
    RateLimitMiddleware,
    path_prefixes=["/api/matrix/"],
    requests_per_minute=30,
)

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

# 4. 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_origin_regex=r"https?://100\.\d{1,3}\.\d{1,3}\.\d{1,3}(:\d+)?",
    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.include_router(world_router)
app.include_router(matrix_router)
app.include_router(tower_router)
app.include_router(daily_run_router)
app.include_router(quests_router)
app.include_router(scorecards_router)
app.include_router(sovereignty_metrics_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()