from __future__ import annotations

import json
from dataclasses import dataclass
from datetime import datetime
from decimal import Decimal
from typing import Any, Awaitable, Callable, Optional

from sqlalchemy import and_, case, func, select
from sqlalchemy.ext.asyncio import AsyncSession

from app.api.tld_prices import get_trending_tlds
from app.models.auction import DomainAuction
from app.models.domain import Domain
from app.models.listing import DomainListing, ListingStatus
from app.models.listing import ListingInquiry, ListingInquiryMessage
from app.models.portfolio import PortfolioDomain
from app.models.sniper_alert import SniperAlert
from app.models.subscription import Subscription, SubscriptionTier
from app.models.user import User
from app.models.yield_domain import YieldDomain, YieldTransaction
from app.services.analyze.service import get_domain_analysis
from app.services.domain_checker import domain_checker
from app.services.hunt.brandables import check_domains, generate_cvcvc, generate_cvccv, generate_human
from app.services.hunt.trends import fetch_google_trends_daily_rss
from app.services.hunt.typos import generate_typos
from app.services.zone_file import get_dropped_domains


ToolHandler = Callable[[AsyncSession, User, dict[str, Any]], Awaitable[dict[str, Any]]]


@dataclass(frozen=True)
class ToolDef:
    name: str
    description: str
    json_schema: dict[str, Any]
    min_tier: SubscriptionTier = SubscriptionTier.TRADER
    handler: ToolHandler | None = None


def _tier_level(tier: SubscriptionTier) -> int:
    if tier == SubscriptionTier.TYCOON:
        return 3
    if tier == SubscriptionTier.TRADER:
        return 2
    return 1


async def _get_subscription(db: AsyncSession, user: User) -> Subscription | None:
    res = await db.execute(select(Subscription).where(Subscription.user_id == user.id))
    return res.scalar_one_or_none()


def _require_tier(user_tier: SubscriptionTier, tool_tier: SubscriptionTier) -> None:
    if _tier_level(user_tier) < _tier_level(tool_tier):
        raise PermissionError(f"Tool requires {tool_tier.value} tier.")


def _clamp_int(value: Any, *, lo: int, hi: int, default: int) -> int:
    try:
        v = int(value)
    except Exception:
        return default
    return max(lo, min(hi, v))


def _clamp_float(value: Any, *, lo: float, hi: float, default: float) -> float:
    try:
        v = float(value)
    except Exception:
        return default
    return max(lo, min(hi, v))


# ============================================================================
# TOOL IMPLEMENTATIONS (READ-ONLY)
# ============================================================================


async def tool_get_subscription(db: AsyncSession, user: User, args: dict[str, Any]) -> dict[str, Any]:
    sub = await _get_subscription(db, user)
    if not sub:
        return {"tier": "scout", "features": {}, "limits": {}}
    cfg = sub.config
    return {
        "tier": sub.tier.value,
        "tier_name": cfg.get("name"),
        "features": cfg.get("features", {}),
        "limits": {
            "watchlist": sub.domain_limit,
            "portfolio": cfg.get("portfolio_limit"),
            "listings": cfg.get("listing_limit"),
            "sniper": cfg.get("sniper_limit"),
            "history_days": cfg.get("history_days"),
            "check_frequency": cfg.get("check_frequency"),
        },
    }


async def tool_get_dashboard_summary(db: AsyncSession, user: User, args: dict[str, Any]) -> dict[str, Any]:
    # Similar to /dashboard/summary but kept lightweight and tool-friendly.
    now = args.get("now")  # ignored (server time used)
    _ = now
    from datetime import datetime, timedelta

    t = datetime.utcnow()
    active = and_(DomainAuction.is_active == True, DomainAuction.end_time > t)
    total_auctions = (await db.execute(select(func.count(DomainAuction.id)).where(active))).scalar() or 0

    cutoff = t + timedelta(hours=24)
    ending = and_(DomainAuction.is_active == True, DomainAuction.end_time > t, DomainAuction.end_time <= cutoff)
    ending_soon_count = (await db.execute(select(func.count(DomainAuction.id)).where(ending))).scalar() or 0

    ending_rows = (
        await db.execute(select(DomainAuction).where(ending).order_by(DomainAuction.end_time.asc()).limit(10))
    ).scalars().all()

    # Listings counts
    listing_counts = (
        await db.execute(
            select(DomainListing.status, func.count(DomainListing.id))
            .where(DomainListing.user_id == user.id)
            .group_by(DomainListing.status)
        )
    ).all()
    by_status = {str(status): int(count) for status, count in listing_counts}

    trending = await get_trending_tlds(db)

    return {
        "market": {
            "total_auctions": total_auctions,
            "ending_soon_24h": ending_soon_count,
            "ending_soon_preview": [
                {
                    "domain": a.domain,
                    "current_bid": a.current_bid,
                    "platform": a.platform,
                    "end_time": a.end_time.isoformat() if a.end_time else None,
                    "auction_url": a.auction_url,
                }
                for a in ending_rows
            ],
        },
        "listings": {
            "active": by_status.get(ListingStatus.ACTIVE.value, 0),
            "sold": by_status.get(ListingStatus.SOLD.value, 0),
            "draft": by_status.get(ListingStatus.DRAFT.value, 0),
            "total": sum(by_status.values()),
        },
        "tlds": trending,
        "timestamp": t.isoformat(),
    }


async def tool_hunt_trends(db: AsyncSession, user: User, args: dict[str, Any]) -> dict[str, Any]:
    geo = (args.get("geo") or "US").strip().upper()
    if len(geo) != 2:
        geo = "US"
    items_raw = await fetch_google_trends_daily_rss(geo=geo)
    return {
        "geo": geo,
        "items": [
            {
                "title": i["title"],
                "approx_traffic": i.get("approx_traffic"),
                "published_at": i.get("published_at"),
                "link": i.get("link"),
            }
            for i in items_raw[:50]
        ],
        "timestamp": datetime.utcnow().isoformat(),
    }


async def tool_hunt_brandables(db: AsyncSession, user: User, args: dict[str, Any]) -> dict[str, Any]:
    pattern = (args.get("pattern") or "cvcvc").strip().lower()
    if pattern not in ("cvcvc", "cvccv", "human"):
        pattern = "cvcvc"

    tlds = args.get("tlds") or ["com"]
    if not isinstance(tlds, list):
        tlds = ["com"]
    tlds = [str(t).lower().lstrip(".") for t in tlds if str(t).strip()]
    if not tlds:
        tlds = ["com"]

    max_checks = _clamp_int(args.get("max_checks"), lo=10, hi=80, default=40)
    limit = _clamp_int(args.get("limit"), lo=1, hi=25, default=15)

    candidates: list[str] = []
    for _ in range(max_checks):
        if pattern == "cvcvc":
            sld = generate_cvcvc()
        elif pattern == "cvccv":
            sld = generate_cvccv()
        else:
            sld = generate_human()
        for t in tlds:
            candidates.append(f"{sld}.{t}")

    checked = await check_domains(candidates, concurrency=30)
    available = [c for c in checked if c.status == "available"]
    seen = set()
    out = []
    for c in available:
        if c.domain in seen:
            continue
        seen.add(c.domain)
        out.append({"domain": c.domain, "status": c.status, "is_available": bool(c.is_available)})
        if len(out) >= limit:
            break

    return {"pattern": pattern, "tlds": tlds, "items": out, "timestamp": datetime.utcnow().isoformat()}


async def tool_hunt_typos(db: AsyncSession, user: User, args: dict[str, Any]) -> dict[str, Any]:
    brand = (args.get("brand") or "").strip()
    if not brand or len(brand) < 2:
        return {"error": "Missing brand"}
    limit = _clamp_int(args.get("limit"), lo=1, hi=30, default=15)
    tlds = args.get("tlds") or ["com"]
    if not isinstance(tlds, list):
        tlds = ["com"]
    tlds = [str(t).lower().lstrip(".") for t in tlds if str(t).strip()]
    if not tlds:
        tlds = ["com"]

    # generate_typos returns SLD strings; we format domains for UX
    slugs = generate_typos(brand, limit=limit)
    items = []
    for sld in slugs:
        for t in tlds[:3]:
            items.append(f"{sld}.{t}")
            if len(items) >= limit:
                break
        if len(items) >= limit:
            break

    return {"brand": brand, "items": items, "timestamp": datetime.utcnow().isoformat()}


async def tool_keyword_availability(db: AsyncSession, user: User, args: dict[str, Any]) -> dict[str, Any]:
    keyword = (args.get("keyword") or "").strip().lower()
    if not keyword:
        return {"error": "Missing keyword"}
    tlds = args.get("tlds") or ["com"]
    if not isinstance(tlds, list):
        tlds = ["com"]
    tlds = [str(t).lower().lstrip(".") for t in tlds if str(t).strip()]
    if not tlds:
        tlds = ["com"]
    limit = _clamp_int(args.get("limit"), lo=1, hi=25, default=10)

    candidates = [f"{keyword}.{t}" for t in tlds][:limit]
    results = []
    for d in candidates:
        r = await domain_checker.check_domain(d)
        results.append({"domain": d, "status": r.status, "is_available": bool(getattr(r, "is_available", False))})
    return {"keyword": keyword, "items": results, "timestamp": datetime.utcnow().isoformat()}


async def tool_portfolio_summary(db: AsyncSession, user: User, args: dict[str, Any]) -> dict[str, Any]:
    rows = (await db.execute(select(PortfolioDomain).where(PortfolioDomain.user_id == user.id))).scalars().all()
    total = len(rows)
    active = sum(1 for d in rows if not d.is_sold and (d.status or "active") != "expired")
    sold = sum(1 for d in rows if bool(d.is_sold))
    total_cost = float(sum(Decimal(str(d.purchase_price or 0)) for d in rows))
    total_value = float(sum(Decimal(str(d.estimated_value or 0)) for d in rows if not d.is_sold))
    roi = None
    if total_cost > 0:
        roi = round(((total_value - total_cost) / total_cost) * 100, 2)
    return {
        "total_domains": total,
        "active_domains": active,
        "sold_domains": sold,
        "total_cost": round(total_cost, 2),
        "total_estimated_value": round(total_value, 2),
        "overall_roi_percent": roi,
        "timestamp": datetime.utcnow().isoformat(),
    }


async def tool_list_portfolio(db: AsyncSession, user: User, args: dict[str, Any]) -> dict[str, Any]:
    limit = _clamp_int(args.get("limit"), lo=1, hi=50, default=25)
    status = (args.get("status") or "").strip().lower() or None
    q = select(PortfolioDomain).where(PortfolioDomain.user_id == user.id)
    if status:
        q = q.where(PortfolioDomain.status == status)
    q = q.order_by(PortfolioDomain.created_at.desc()).limit(limit)
    rows = (await db.execute(q)).scalars().all()
    return {
        "items": [
            {
                "id": d.id,
                "domain": d.domain,
                "status": d.status,
                "purchase_price": d.purchase_price,
                "estimated_value": d.estimated_value,
                "roi": d.roi,
                "renewal_date": d.renewal_date.isoformat() if d.renewal_date else None,
                "is_dns_verified": bool(getattr(d, "is_dns_verified", False) or False),
            }
            for d in rows
        ],
        "count": len(rows),
        "timestamp": datetime.utcnow().isoformat(),
    }


async def tool_list_sniper_alerts(db: AsyncSession, user: User, args: dict[str, Any]) -> dict[str, Any]:
    limit = _clamp_int(args.get("limit"), lo=1, hi=50, default=25)
    rows = (
        await db.execute(
            select(SniperAlert)
            .where(SniperAlert.user_id == user.id)
            .order_by(SniperAlert.created_at.desc())
            .limit(limit)
        )
    ).scalars().all()
    return {
        "items": [
            {
                "id": a.id,
                "name": a.name,
                "description": a.description,
                "is_active": bool(a.is_active),
                "tlds": a.tlds,
                "keywords": a.keywords,
                "exclude_keywords": a.exclude_keywords,
                "max_price": a.max_price,
                "ending_within_hours": a.ending_within_hours,
                "notify_email": bool(a.notify_email),
                "notify_sms": bool(a.notify_sms),
                "created_at": a.created_at.isoformat() if a.created_at else None,
            }
            for a in rows
        ],
        "count": len(rows),
        "timestamp": datetime.utcnow().isoformat(),
    }


async def tool_list_my_listings(db: AsyncSession, user: User, args: dict[str, Any]) -> dict[str, Any]:
    limit = _clamp_int(args.get("limit"), lo=1, hi=50, default=25)
    rows = (
        await db.execute(
            select(DomainListing)
            .where(DomainListing.user_id == user.id)
            .order_by(DomainListing.updated_at.desc())
            .limit(limit)
        )
    ).scalars().all()
    return {
        "items": [
            {
                "id": l.id,
                "domain": l.domain,
                "status": l.status,
                "asking_price": l.asking_price,
                "min_offer": l.min_offer,
                "currency": l.currency,
                "slug": l.slug,
                "verification_status": l.verification_status,
                "view_count": l.view_count,
                "inquiry_count": l.inquiry_count,
                "updated_at": l.updated_at.isoformat() if l.updated_at else None,
            }
            for l in rows
        ],
        "count": len(rows),
        "timestamp": datetime.utcnow().isoformat(),
    }


async def tool_get_inbox_counts(db: AsyncSession, user: User, args: dict[str, Any]) -> dict[str, Any]:
    buyer_inqs = (await db.execute(select(ListingInquiry.id).where(ListingInquiry.buyer_user_id == user.id))).scalars().all()
    buyer_unread = 0
    for inq_id in list(buyer_inqs)[:200]:
        msg = (
            await db.execute(
                select(ListingInquiryMessage)
                .where(ListingInquiryMessage.inquiry_id == inq_id)
                .order_by(ListingInquiryMessage.created_at.desc())
                .limit(1)
            )
        ).scalar_one_or_none()
        if msg and msg.sender_user_id != user.id:
            buyer_unread += 1

    listing_ids = (await db.execute(select(DomainListing.id).where(DomainListing.user_id == user.id))).scalars().all()
    seller_unread = 0
    if listing_ids:
        new_count = (
            await db.execute(
                select(func.count(ListingInquiry.id)).where(
                    and_(ListingInquiry.listing_id.in_(listing_ids), ListingInquiry.status == "new")
                )
            )
        ).scalar() or 0
        seller_unread += int(new_count)

        inqs = (
            await db.execute(
                select(ListingInquiry.id, ListingInquiry.status)
                .where(
                    and_(
                        ListingInquiry.listing_id.in_(listing_ids),
                        ListingInquiry.status.notin_(["closed", "spam"]),
                    )
                )
                .order_by(ListingInquiry.created_at.desc())
                .limit(200)
            )
        ).all()
        for inq_id, st in inqs:
            if st == "new":
                continue
            msg = (
                await db.execute(
                    select(ListingInquiryMessage)
                    .where(ListingInquiryMessage.inquiry_id == inq_id)
                    .order_by(ListingInquiryMessage.created_at.desc())
                    .limit(1)
                )
            ).scalar_one_or_none()
            if msg and msg.sender_user_id != user.id:
                seller_unread += 1

    return {"buyer_unread": buyer_unread, "seller_unread": seller_unread, "total_unread": buyer_unread + seller_unread}


async def tool_get_seller_inbox(db: AsyncSession, user: User, args: dict[str, Any]) -> dict[str, Any]:
    limit = _clamp_int(args.get("limit"), lo=1, hi=50, default=25)
    status_filter = (args.get("status") or "all").strip().lower()

    listings = (await db.execute(select(DomainListing).where(DomainListing.user_id == user.id))).scalars().all()
    listing_map = {l.id: l for l in listings}
    if not listing_map:
        return {"inquiries": [], "total": 0, "unread": 0}

    q = (
        select(ListingInquiry)
        .where(ListingInquiry.listing_id.in_(list(listing_map.keys())))
        .order_by(ListingInquiry.created_at.desc())
    )
    if status_filter and status_filter != "all":
        q = q.where(ListingInquiry.status == status_filter)
    inqs = (await db.execute(q.limit(limit))).scalars().all()

    unread = sum(1 for i in inqs if i.status == "new" or not i.read_at)
    items = []
    for inq in inqs:
        listing = listing_map.get(inq.listing_id)
        if not listing:
            continue
        latest_msg = (
            await db.execute(
                select(ListingInquiryMessage)
                .where(ListingInquiryMessage.inquiry_id == inq.id)
                .order_by(ListingInquiryMessage.created_at.desc())
                .limit(1)
            )
        ).scalar_one_or_none()
        items.append(
            {
                "id": inq.id,
                "domain": listing.domain,
                "listing_id": listing.id,
                "slug": listing.slug,
                "status": inq.status,
                "buyer_name": inq.name,
                "offer_amount": inq.offer_amount,
                "created_at": inq.created_at.isoformat() if inq.created_at else None,
                "has_unread_reply": bool(latest_msg and latest_msg.sender_user_id != user.id and inq.status not in ["closed", "spam"]),
                "last_message_preview": (
                    (latest_msg.body[:100] + "..." if len(latest_msg.body) > 100 else latest_msg.body)
                    if latest_msg
                    else ((inq.message or "")[:100])
                ),
                "last_message_at": latest_msg.created_at.isoformat() if latest_msg and latest_msg.created_at else (inq.created_at.isoformat() if inq.created_at else None),
            }
        )

    return {"inquiries": items, "total": len(items), "unread": unread, "timestamp": datetime.utcnow().isoformat()}


async def tool_yield_dashboard(db: AsyncSession, user: User, args: dict[str, Any]) -> dict[str, Any]:
    now = datetime.utcnow()
    month_start = now.replace(day=1, hour=0, minute=0, second=0, microsecond=0)

    domains = (
        await db.execute(
            select(YieldDomain)
            .where(YieldDomain.user_id == user.id)
            .order_by(YieldDomain.total_revenue.desc())
        )
    ).scalars().all()
    domain_ids = [d.id for d in domains]

    monthly_revenue = Decimal("0")
    monthly_clicks = 0
    monthly_conversions = 0
    if domain_ids:
        monthly_stats = (
            await db.execute(
                select(
                    func.coalesce(
                        func.sum(
                            case(
                                (YieldTransaction.status.in_(["confirmed", "paid"]), YieldTransaction.net_amount),
                                else_=0,
                            )
                        ),
                        0,
                    ).label("revenue"),
                    func.sum(case((YieldTransaction.event_type == "click", 1), else_=0)).label("clicks"),
                    func.sum(
                        case(
                            (
                                and_(
                                    YieldTransaction.event_type.in_(["lead", "sale"]),
                                    YieldTransaction.status.in_(["confirmed", "paid"]),
                                ),
                                1,
                            ),
                            else_=0,
                        )
                    ).label("conversions"),
                ).where(YieldTransaction.yield_domain_id.in_(domain_ids), YieldTransaction.created_at >= month_start)
            )
        ).first()
        if monthly_stats:
            monthly_revenue = monthly_stats.revenue or Decimal("0")
            monthly_clicks = int(monthly_stats.clicks or 0)
            monthly_conversions = int(monthly_stats.conversions or 0)

    return {
        "stats": {
            "active_domains": sum(1 for d in domains if d.status == "active"),
            "total_domains": len(domains),
            "monthly_revenue": float(monthly_revenue),
            "monthly_clicks": monthly_clicks,
            "monthly_conversions": monthly_conversions,
        },
        "top_domains": [
            {
                "id": d.id,
                "domain": d.domain,
                "status": d.status,
                "dns_verified": bool(d.dns_verified),
                "total_revenue": float(d.total_revenue or 0),
                "total_clicks": int(d.total_clicks or 0),
                "total_conversions": int(d.total_conversions or 0),
                "detected_intent": d.detected_intent,
            }
            for d in domains[:10]
        ],
        "timestamp": now.isoformat(),
    }


async def tool_list_watchlist(db: AsyncSession, user: User, args: dict[str, Any]) -> dict[str, Any]:
    page = _clamp_int(args.get("page"), lo=1, hi=50, default=1)
    per_page = _clamp_int(args.get("per_page"), lo=1, hi=50, default=20)
    offset = (page - 1) * per_page
    total = (await db.execute(select(func.count(Domain.id)).where(Domain.user_id == user.id))).scalar() or 0
    rows = (
        await db.execute(
            select(Domain)
            .where(Domain.user_id == user.id)
            .order_by(Domain.created_at.desc())
            .offset(offset)
            .limit(per_page)
        )
    ).scalars().all()
    return {
        "page": page,
        "per_page": per_page,
        "total": int(total),
        "domains": [
            {
                "id": d.id,
                "name": d.name,
                "status": getattr(d.status, "value", d.status),
                "is_available": bool(d.is_available),
                "registrar": d.registrar,
                "created_at": d.created_at.isoformat() if d.created_at else None,
                "updated_at": d.updated_at.isoformat() if d.updated_at else None,
            }
            for d in rows
        ],
    }


async def tool_analyze_domain(db: AsyncSession, user: User, args: dict[str, Any]) -> dict[str, Any]:
    domain = (args.get("domain") or "").strip()
    if not domain:
        return {"error": "Missing domain"}
    fast = bool(args.get("fast", False))
    refresh = bool(args.get("refresh", False))
    res = await get_domain_analysis(db, domain, fast=fast, refresh=refresh)
    return res.model_dump(mode="json")


async def tool_market_feed(db: AsyncSession, user: User, args: dict[str, Any]) -> dict[str, Any]:
    # Read-only query against DomainAuction similar to /auctions/feed; keep it capped.
    from datetime import datetime, timedelta

    limit = _clamp_int(args.get("limit"), lo=1, hi=50, default=20)
    source = (args.get("source") or "all").lower()
    keyword = (args.get("keyword") or "").strip().lower() or None
    tld = (args.get("tld") or "").strip().lower().lstrip(".") or None
    sort_by = (args.get("sort_by") or "time").lower()
    ending_within = args.get("ending_within_hours")
    ending_within_h = _clamp_int(ending_within, lo=1, hi=168, default=0) if ending_within is not None else None

    now = datetime.utcnow()
    q = select(DomainAuction).where(DomainAuction.is_active == True, DomainAuction.end_time > now)

    if source in ("pounce", "external"):
        q = q.where(DomainAuction.source == source)
    if keyword:
        q = q.where(DomainAuction.domain.ilike(f"%{keyword}%"))
    if tld:
        q = q.where(DomainAuction.domain.ilike(f"%.{tld}"))
    if ending_within_h:
        q = q.where(DomainAuction.end_time <= (now + timedelta(hours=ending_within_h)))

    if sort_by == "score":
        q = q.order_by(DomainAuction.score.desc().nullslast(), DomainAuction.end_time.asc())
    else:
        q = q.order_by(DomainAuction.end_time.asc())

    auctions = (await db.execute(q.limit(limit))).scalars().all()
    return {
        "items": [
            {
                "domain": a.domain,
                "current_bid": a.current_bid,
                "platform": a.platform,
                "end_time": a.end_time.isoformat() if a.end_time else None,
                "bids": a.bids,
                "score": a.score,
                "auction_url": a.auction_url,
                "source": a.source,
            }
            for a in auctions
        ],
        "count": len(auctions),
        "timestamp": now.isoformat(),
    }


async def tool_get_drops(db: AsyncSession, user: User, args: dict[str, Any]) -> dict[str, Any]:
    tld = (args.get("tld") or None)
    hours = _clamp_int(args.get("hours"), lo=1, hi=48, default=24)
    limit = _clamp_int(args.get("limit"), lo=1, hi=100, default=50)
    offset = _clamp_int(args.get("offset"), lo=0, hi=10000, default=0)
    keyword = (args.get("keyword") or None)
    min_length = args.get("min_length")
    max_length = args.get("max_length")
    exclude_numeric = bool(args.get("exclude_numeric", False))
    exclude_hyphen = bool(args.get("exclude_hyphen", False))

    result = await get_dropped_domains(
        db=db,
        tld=(tld.lower().lstrip(".") if isinstance(tld, str) and tld.strip() else None),
        hours=hours,
        min_length=int(min_length) if min_length is not None else None,
        max_length=int(max_length) if max_length is not None else None,
        exclude_numeric=exclude_numeric,
        exclude_hyphen=exclude_hyphen,
        keyword=(str(keyword).strip() if keyword else None),
        limit=limit,
        offset=offset,
    )
    return result


def get_tool_defs() -> list[ToolDef]:
    return [
        ToolDef(
            name="get_subscription",
            description="Get current user's subscription tier, features and limits.",
            json_schema={"type": "object", "properties": {}, "additionalProperties": False},
            min_tier=SubscriptionTier.TRADER,
            handler=tool_get_subscription,
        ),
        ToolDef(
            name="get_dashboard_summary",
            description="Get a compact snapshot: ending auctions, listing stats, trending TLDs.",
            json_schema={"type": "object", "properties": {}, "additionalProperties": False},
            min_tier=SubscriptionTier.TRADER,
            handler=tool_get_dashboard_summary,
        ),
        ToolDef(
            name="hunt_trends",
            description="Get Google Trends daily RSS items (Hunt > Trends).",
            json_schema={
                "type": "object",
                "properties": {"geo": {"type": "string", "minLength": 2, "maxLength": 2}},
                "additionalProperties": False,
            },
            min_tier=SubscriptionTier.TRADER,
            handler=tool_hunt_trends,
        ),
        ToolDef(
            name="hunt_brandables",
            description="Generate brandable domains and check availability (Hunt > Forge).",
            json_schema={
                "type": "object",
                "properties": {
                    "pattern": {"type": "string", "enum": ["cvcvc", "cvccv", "human"]},
                    "tlds": {"type": "array", "items": {"type": "string"}},
                    "max_checks": {"type": "integer", "minimum": 10, "maximum": 80},
                    "limit": {"type": "integer", "minimum": 1, "maximum": 25},
                },
                "additionalProperties": False,
            },
            min_tier=SubscriptionTier.TRADER,
            handler=tool_hunt_brandables,
        ),
        ToolDef(
            name="hunt_typos",
            description="Generate typo candidates for a brand (Hunt > Typos).",
            json_schema={
                "type": "object",
                "properties": {
                    "brand": {"type": "string"},
                    "tlds": {"type": "array", "items": {"type": "string"}},
                    "limit": {"type": "integer", "minimum": 1, "maximum": 30},
                },
                "required": ["brand"],
                "additionalProperties": False,
            },
            min_tier=SubscriptionTier.TRADER,
            handler=tool_hunt_typos,
        ),
        ToolDef(
            name="keyword_availability",
            description="Check availability for keyword + TLD list (Hunt > Search).",
            json_schema={
                "type": "object",
                "properties": {
                    "keyword": {"type": "string"},
                    "tlds": {"type": "array", "items": {"type": "string"}},
                    "limit": {"type": "integer", "minimum": 1, "maximum": 25},
                },
                "required": ["keyword"],
                "additionalProperties": False,
            },
            min_tier=SubscriptionTier.TRADER,
            handler=tool_keyword_availability,
        ),
        ToolDef(
            name="list_watchlist",
            description="List user's watchlist domains (monitored domains).",
            json_schema={
                "type": "object",
                "properties": {
                    "page": {"type": "integer", "minimum": 1, "maximum": 50},
                    "per_page": {"type": "integer", "minimum": 1, "maximum": 50},
                },
                "additionalProperties": False,
            },
            min_tier=SubscriptionTier.TRADER,
            handler=tool_list_watchlist,
        ),
        ToolDef(
            name="portfolio_summary",
            description="Get portfolio summary (counts, total cost/value, ROI).",
            json_schema={"type": "object", "properties": {}, "additionalProperties": False},
            min_tier=SubscriptionTier.TRADER,
            handler=tool_portfolio_summary,
        ),
        ToolDef(
            name="list_portfolio",
            description="List portfolio domains (owned domains).",
            json_schema={
                "type": "object",
                "properties": {
                    "status": {"type": "string"},
                    "limit": {"type": "integer", "minimum": 1, "maximum": 50},
                },
                "additionalProperties": False,
            },
            min_tier=SubscriptionTier.TRADER,
            handler=tool_list_portfolio,
        ),
        ToolDef(
            name="list_sniper_alerts",
            description="List sniper alerts (user-defined filters).",
            json_schema={
                "type": "object",
                "properties": {"limit": {"type": "integer", "minimum": 1, "maximum": 50}},
                "additionalProperties": False,
            },
            min_tier=SubscriptionTier.TRADER,
            handler=tool_list_sniper_alerts,
        ),
        ToolDef(
            name="list_my_listings",
            description="List seller's Pounce Direct listings (For Sale).",
            json_schema={
                "type": "object",
                "properties": {"limit": {"type": "integer", "minimum": 1, "maximum": 50}},
                "additionalProperties": False,
            },
            min_tier=SubscriptionTier.TRADER,
            handler=tool_list_my_listings,
        ),
        ToolDef(
            name="get_inbox_counts",
            description="Get unified buyer/seller unread counts for inbox badge.",
            json_schema={"type": "object", "properties": {}, "additionalProperties": False},
            min_tier=SubscriptionTier.TRADER,
            handler=tool_get_inbox_counts,
        ),
        ToolDef(
            name="get_seller_inbox",
            description="Seller inbox threads across all listings (preview list).",
            json_schema={
                "type": "object",
                "properties": {
                    "status": {"type": "string", "enum": ["all", "new", "read", "replied", "closed", "spam"]},
                    "limit": {"type": "integer", "minimum": 1, "maximum": 50},
                },
                "additionalProperties": False,
            },
            min_tier=SubscriptionTier.TRADER,
            handler=tool_get_seller_inbox,
        ),
        ToolDef(
            name="analyze_domain",
            description="Run Pounce domain analysis (Authority/Market/Risk/Value) for a given domain.",
            json_schema={
                "type": "object",
                "properties": {
                    "domain": {"type": "string"},
                    "fast": {"type": "boolean"},
                    "refresh": {"type": "boolean"},
                },
                "required": ["domain"],
                "additionalProperties": False,
            },
            min_tier=SubscriptionTier.TRADER,
            handler=tool_analyze_domain,
        ),
        ToolDef(
            name="market_feed",
            description="Get current auction feed (filters: source, keyword, tld, ending window).",
            json_schema={
                "type": "object",
                "properties": {
                    "source": {"type": "string", "enum": ["all", "pounce", "external"]},
                    "keyword": {"type": "string"},
                    "tld": {"type": "string"},
                    "sort_by": {"type": "string", "enum": ["time", "score"]},
                    "ending_within_hours": {"type": "integer", "minimum": 1, "maximum": 168},
                    "limit": {"type": "integer", "minimum": 1, "maximum": 50},
                },
                "additionalProperties": False,
            },
            min_tier=SubscriptionTier.TRADER,
            handler=tool_market_feed,
        ),
        ToolDef(
            name="get_drops",
            description="Get recently dropped domains from zone files (auth required).",
            json_schema={
                "type": "object",
                "properties": {
                    "tld": {"type": "string"},
                    "hours": {"type": "integer", "minimum": 1, "maximum": 48},
                    "min_length": {"type": "integer", "minimum": 1, "maximum": 63},
                    "max_length": {"type": "integer", "minimum": 1, "maximum": 63},
                    "exclude_numeric": {"type": "boolean"},
                    "exclude_hyphen": {"type": "boolean"},
                    "keyword": {"type": "string"},
                    "limit": {"type": "integer", "minimum": 1, "maximum": 100},
                    "offset": {"type": "integer", "minimum": 0, "maximum": 10000},
                },
                "additionalProperties": False,
            },
            min_tier=SubscriptionTier.TRADER,
            handler=tool_get_drops,
        ),
        ToolDef(
            name="yield_dashboard",
            description="Get Yield dashboard stats and top earning domains.",
            json_schema={"type": "object", "properties": {}, "additionalProperties": False},
            min_tier=SubscriptionTier.TRADER,
            handler=tool_yield_dashboard,
        ),
    ]


def tools_for_path(path: str) -> list[str]:
    """
    Limit the visible tool list depending on the current Terminal page.
    This keeps prompts smaller and makes the model more decisive.
    """
    p = (path or "").split("?")[0]
    if p.startswith("/terminal/hunt"):
        return [
            "get_subscription",
            "get_dashboard_summary",
            "market_feed",
            "get_drops",
            "hunt_trends",
            "hunt_brandables",
            "hunt_typos",
            "keyword_availability",
            "analyze_domain",
            "list_watchlist",
        ]
    if p.startswith("/terminal/market"):
        return ["get_subscription", "market_feed", "analyze_domain"]
    if p.startswith("/terminal/watchlist"):
        return ["get_subscription", "list_watchlist", "analyze_domain"]
    if p.startswith("/terminal/portfolio"):
        return ["get_subscription", "portfolio_summary", "list_portfolio", "analyze_domain"]
    if p.startswith("/terminal/sniper"):
        return ["get_subscription", "list_sniper_alerts", "market_feed", "analyze_domain"]
    if p.startswith("/terminal/listing"):
        return ["get_subscription", "list_my_listings", "get_seller_inbox"]
    if p.startswith("/terminal/inbox"):
        return ["get_subscription", "get_inbox_counts", "get_seller_inbox"]
    if p.startswith("/terminal/yield"):
        return ["get_subscription", "yield_dashboard"]
    if p.startswith("/terminal/intel"):
        return ["get_subscription", "analyze_domain", "market_feed", "get_drops"]
    if p.startswith("/terminal/settings"):
        return ["get_subscription"]
    if p.startswith("/terminal/welcome"):
        return ["get_subscription", "get_dashboard_summary"]
    # default: allow a safe minimal set
    return ["get_subscription", "get_dashboard_summary", "analyze_domain"]


async def execute_tool(db: AsyncSession, user: User, name: str, args: dict[str, Any], *, path: str) -> dict[str, Any]:
    defs = {t.name: t for t in get_tool_defs()}
    tool = defs.get(name)
    if tool is None or tool.handler is None:
        return {"error": f"Unknown tool: {name}"}

    # Enforce tool allowed on this page
    allowed = set(tools_for_path(path))
    if name not in allowed:
        return {"error": f"Tool not allowed for path: {name}"}

    sub = await _get_subscription(db, user)
    user_tier = sub.tier if sub else SubscriptionTier.SCOUT
    try:
        _require_tier(user_tier, tool.min_tier)
    except PermissionError as e:
        return {"error": str(e)}

    try:
        return await tool.handler(db, user, args or {})
    except Exception as e:
        return {"error": f"{type(e).__name__}: {e}"}


def tool_catalog_for_prompt(path: str) -> list[dict[str, Any]]:
    allowed = set(tools_for_path(path))
    out: list[dict[str, Any]] = []
    for t in get_tool_defs():
        if t.name in allowed:
            out.append(
                {
                    "name": t.name,
                    "description": t.description,
                    "schema": t.json_schema,
                }
            )
    return out