"""
Envanter + consumable kullanımı + tool tanımları.

NOT (2026-07-04): Node hasat sistemi kaldırıldı — kaynak toplama artık
lokasyon bazlı (routers/travel.py: POST /world/gather). SKILL_TOOLS burada
tanımlı kalır, travel.py buradan import eder.
"""
from datetime import datetime, timezone

from fastapi import APIRouter, Depends, HTTPException
from pydantic import BaseModel, Field
from sqlalchemy import bindparam, select, text
from sqlalchemy.ext.asyncio import AsyncSession

from deps import get_current_user
from models import Character, User, get_db

router = APIRouter(prefix="/world", tags=["inventory"])

# Tool şartı: bu skill'lerle toplama için envanterde listedeki tool'lardan biri olmalı.
# Foraging (elle toplama) serbest. İlk tool'lar elle toplanan taş/sopa/sarmaşıktan craft edilir.
SKILL_TOOLS = {
    "woodcutting": ["axe_stone", "axe_copper", "axe_iron"],
    "mining": ["pickaxe_stone", "pickaxe_copper", "pickaxe_iron"],
    "fishing": ["fishing_rod", "fishing_rod_fine", "fishing_rod_master"],
}
TOOL_LABEL = {"woodcutting": "Balta", "mining": "Kazma", "fishing": "Olta"}


async def _has_any_tool(db: AsyncSession, char_id: int, codes: list[str]) -> bool:
    stmt = text("""
        SELECT 1 FROM inventory inv JOIN items i ON i.id = inv.item_id
        WHERE inv.character_id = :cid AND i.code IN :codes LIMIT 1
    """).bindparams(bindparam("codes", expanding=True))
    row = (await db.execute(stmt, {"cid": char_id, "codes": codes})).first()
    return row is not None


async def consume_items(db: AsyncSession, char_id: int, item_id: int, qty: int, item_name: str) -> None:
    """Envanterden FIFO tüket — market/camp/use-item ortak paterni.
    Yetersizse HTTPException(400) fırlatır."""
    stacks = (await db.execute(text(
        "SELECT id, qty FROM inventory WHERE character_id=:cid AND item_id=:iid ORDER BY slot"
    ), {"cid": char_id, "iid": item_id})).all()
    have = sum(s[1] for s in stacks)
    if have < qty:
        raise HTTPException(400, f"{item_name} yetersiz: {qty} gerekli, {have} var")
    remaining = qty
    for st in stacks:
        if remaining <= 0:
            break
        take = min(remaining, st[1])
        if take == st[1]:
            await db.execute(text("DELETE FROM inventory WHERE id = :id"), {"id": st[0]})
        else:
            await db.execute(text("UPDATE inventory SET qty = qty - :t WHERE id = :id"), {"t": take, "id": st[0]})
        remaining -= take


class InventoryItem(BaseModel):
    slot: int
    item_code: str
    item_name: str
    rarity: str
    qty: int
    icon: str | None = None
    item_type: str = "material"
    effect: dict | None = None


@router.get("/inventory", response_model=list[InventoryItem])
async def inventory(user: User = Depends(get_current_user), db: AsyncSession = Depends(get_db)):
    char = (await db.execute(select(Character).where(Character.user_id == user.id))).scalar_one_or_none()
    if not char:
        return []
    rows = (await db.execute(text("""
        SELECT inv.slot, i.code, i.name, i.rarity, inv.qty, i.icon, i.type, i.effect
        FROM inventory inv JOIN items i ON i.id = inv.item_id
        WHERE inv.character_id = :cid
        ORDER BY inv.slot
    """), {"cid": char.id})).all()
    return [
        InventoryItem(slot=r[0], item_code=r[1], item_name=r[2], rarity=r[3], qty=r[4],
                      icon=r[5], item_type=r[6], effect=r[7])
        for r in rows
    ]


class UseItemIn(BaseModel):
    item_code: str
    qty: int = Field(1, ge=1, le=10)


class UseItemOut(BaseModel):
    item_code: str
    item_name: str
    qty_used: int
    effect_type: str
    effect_amount: int
    step_balance: int


@router.post("/use-item", response_model=UseItemOut)
async def use_item(u: UseItemIn, user: User = Depends(get_current_user), db: AsyncSession = Depends(get_db)):
    char = (await db.execute(select(Character).where(Character.user_id == user.id))).scalar_one_or_none()
    if not char:
        raise HTTPException(404, "Karakter yok")

    item = (await db.execute(
        text("SELECT id, name, type, effect FROM items WHERE code = :c"), {"c": u.item_code}
    )).first()
    if not item:
        raise HTTPException(404, "Item yok")
    item_id, item_name, item_type, effect = item[0], item[1], item[2], item[3]
    if item_type != "consumable" or not effect:
        raise HTTPException(400, f"{item_name} kullanılabilir bir item değil")
    if effect.get("type") != "steps":
        raise HTTPException(400, f"Bilinmeyen etki türü: {effect.get('type')}")

    # Envanterde yeterli mi (FIFO tüket — craft ile aynı patern)
    stacks = (await db.execute(text("""
        SELECT id, qty FROM inventory
        WHERE character_id = :cid AND item_id = :iid
        ORDER BY slot
    """), {"cid": char.id, "iid": item_id})).all()
    have = sum(s[1] for s in stacks)
    if have < u.qty:
        raise HTTPException(400, f"{item_name} yetersiz: {u.qty} gerekli, {have} var")

    remaining = u.qty
    for st in stacks:
        if remaining <= 0:
            break
        take = min(remaining, st[1])
        if take == st[1]:
            await db.execute(text("DELETE FROM inventory WHERE id = :id"), {"id": st[0]})
        else:
            await db.execute(text("UPDATE inventory SET qty = qty - :t WHERE id = :id"), {"t": take, "id": st[0]})
        remaining -= take

    # Etki: adım bakiyesi yenile (lifetime'a sayılmaz — gerçek yürüyüş değil)
    gained = int(effect["amount"]) * u.qty
    char.step_balance += gained
    await db.execute(
        text("INSERT INTO step_log (character_id, steps_delta, source, accepted, reason) "
             "VALUES (:cid, :d, 'consumable', true, :r)"),
        {"cid": char.id, "d": gained, "r": f"{u.item_code} x{u.qty}"},
    )

    char.last_sync_at = datetime.now(timezone.utc)
    await db.commit()

    return UseItemOut(
        item_code=u.item_code,
        item_name=item_name,
        qty_used=u.qty,
        effect_type="steps",
        effect_amount=gained,
        step_balance=char.step_balance,
    )