"""JSON-file store for the demo. Test data only."""
import json, os, threading, time, uuid, copy

SEED_LISTINGS = [
    {"title": "Used road bike (54 cm frame)", "kind": "product", "price": 18000, "category": "bikes",
     "description": "Aluminium road bike, 18 gears, new tyres last season. Some scratches on the top tube.",
     "tags": ["bike", "bicycle", "cycling", "road"], "emoji": "🚲", "seller": "test-seller-01", "seller_type": "human",
     "area": "Demo Town (north)", "payment_options": ["online", "cash"]},
    {"title": "Maths tutoring, 1 hour (high school)", "kind": "service", "price": 3500, "category": "tutoring",
     "description": "One-on-one algebra, geometry or calculus help. Online or at a library.",
     "tags": ["tutor", "tutoring", "math", "maths", "lesson", "school"], "emoji": "📐", "seller": "test-seller-02",
     "seller_type": "human", "area": "Online / Demo Town", "payment_options": ["online", "cash"]},
    {"title": "Python coding tutoring, 1 hour", "kind": "service", "price": 4500, "category": "tutoring",
     "description": "Beginner-friendly Python sessions: basics, small projects, debugging help.",
     "tags": ["tutor", "tutoring", "coding", "python", "programming", "lesson"], "emoji": "🐍",
     "seller": "agent:tutor-bot (test agent)", "seller_type": "agent", "area": "Online", "payment_options": ["online"]},
    {"title": "Handmade ceramic table lamp", "kind": "product", "price": 6500, "category": "home",
     "description": "Wheel-thrown glazed ceramic base, linen shade, warm LED bulb included.",
     "tags": ["lamp", "light", "handmade", "ceramic", "home", "decor"], "emoji": "🪔", "seller": "test-seller-03",
     "seller_type": "human", "area": "Demo Town (east)", "payment_options": ["online", "cash"]},
    {"title": "Lawn mowing, small yard", "kind": "service", "price": 4000, "category": "garden",
     "description": "Mow, edge and blow for yards up to about 300 m². Green waste taken away.",
     "tags": ["lawn", "mowing", "garden", "yard", "grass"], "emoji": "🌿", "seller": "test-seller-04",
     "seller_type": "human", "area": "Demo Town (south)", "payment_options": ["online", "cash"]},
    {"title": "Bike tune-up service", "kind": "service", "price": 3000, "category": "bikes",
     "description": "Gears and brakes adjusted, chain cleaned and lubed, tyres checked.",
     "tags": ["bike", "bicycle", "repair", "service", "tune"], "emoji": "🔧",
     "seller": "agent:fixit-bot (test agent)", "seller_type": "agent", "area": "Demo Town (west)",
     "payment_options": ["online", "cash"]},
    {"title": "Kids' bike, 16 inch", "kind": "product", "price": 5500, "category": "bikes",
     "description": "Training wheels included. Fits ages 4 to 6.",
     "tags": ["bike", "bicycle", "kids"], "emoji": "🚴", "seller": "test-seller-05", "seller_type": "human",
     "area": "Demo Town (north)", "payment_options": ["cash"]},
]


def now():
    return time.strftime("%Y-%m-%dT%H:%M:%S%z")


def new_id(prefix):
    return f"{prefix}_{uuid.uuid4().hex[:8]}"


class Store:
    def __init__(self, data_dir):
        os.makedirs(data_dir, exist_ok=True)
        self.path = os.path.join(data_dir, "store.json")
        self.lock = threading.RLock()
        if os.path.exists(self.path):
            with open(self.path) as f:
                self.db = json.load(f)
        else:
            self.db = {"listings": {}, "intents": {}, "orders": {}, "cash_deals": {}, "events": []}
            for s in SEED_LISTINGS:
                lid = new_id("lst")
                self.db["listings"][lid] = {**s, "id": lid, "currency": "USD", "status": "active",
                                            "test_data": True, "created_at": now()}
            self.save()

    def save(self):
        with self.lock:
            tmp = self.path + ".tmp"
            with open(tmp, "w") as f:
                json.dump(self.db, f, indent=1)
            os.replace(tmp, self.path)

    def get(self, table, key):
        with self.lock:
            v = self.db[table].get(key)
            return copy.deepcopy(v) if v else None

    def put(self, table, obj):
        with self.lock:
            self.db[table][obj["id"]] = obj
            self.save()
            return copy.deepcopy(obj)

    def all(self, table):
        with self.lock:
            return copy.deepcopy(list(self.db[table].values()))

    def log(self, kind, data):
        with self.lock:
            self.db["events"].append({"at": now(), "kind": kind, **data})
            self.db["events"] = self.db["events"][-500:]
            self.save()