import os
from flask import Flask, request, jsonify
from dotenv import load_dotenv
from pymongo import MongoClient
import openai
from datetime import datetime

load_dotenv()

app = Flask(__name__)

# MongoDB bağlantısı
client = MongoClient(os.getenv("MONGODB_URI"))
db = client[os.getenv("MONGODB_DB_NAME")]

# OpenAI API anahtarı
openai.api_key = os.getenv("OPENAI_API_KEY")

# Model grupları ve modeller
MODEL_GROUPS = {
    "GPT4_GROUP": ["gpt-4", "gpt-4-0125-preview", "gpt-4-0613", "gpt-4-1106-preview"],
    "GPT4_TURBO_GROUP": ["gpt-4-turbo", "gpt-4-turbo-preview"],
    "GPT35_GROUP": ["gpt-3.5-turbo", "gpt-3.5-turbo-0125", "gpt-3.5-turbo-16k", "gpt-3.5-turbo-1106"],
}

MODELS = {
    "GPT4": MODEL_GROUPS["GPT4_GROUP"] + MODEL_GROUPS["GPT4_TURBO_GROUP"],
    "GPT35": MODEL_GROUPS["GPT35_GROUP"],
    "IMAGE": ["dall-e-2", "dall-e-3"],
}

# Kullanıcı seviyeleri
TIERS = {
    1: {
        "models": MODELS["GPT35"],
        "limits": {"daily": 100, "GPT35_GROUP": 100}
    },
    2: {
        "models": MODELS["GPT35"] + MODELS["GPT4"],
        "limits": {"daily": 500, "GPT35_GROUP": 300, "GPT4_GROUP": 150, "GPT4_TURBO_GROUP": 50}
    },
    3: {
        "models": MODELS["GPT35"] + MODELS["GPT4"] + MODELS["IMAGE"],
        "limits": {"daily": 1000, "GPT35_GROUP": 500, "GPT4_GROUP": 300, "GPT4_TURBO_GROUP": 100, "dall-e-2": 50, "dall-e-3": 25}
    }
}

def get_user_tier(api_key):
    user = db.users.find_one({"api_key": api_key})
    if user:
        return user["tier"]
    for i in range(1, 4):
        if os.getenv(f"USER_{i}_API_KEY") == api_key:
            return int(os.getenv(f"USER_{i}_TIER"))
    return None

def get_model_group(model):
    for group, models in MODEL_GROUPS.items():
        if model in models:
            return group
    return model

def check_rate_limit(api_key, tier, model):
    now = datetime.now()
    today = now.date().isoformat()
    model_group = get_model_group(model)

    usage = db.usage.find_one_and_update(
        {"api_key": api_key, "date": today},
        {"$inc": {"daily": 1, model_group: 1}},
        upsert=True,
        return_document=True
    )

    tier_limits = TIERS[tier]["limits"]
    if usage["daily"] > tier_limits["daily"]:
        raise Exception("Daily rate limit exceeded")
    if usage.get(model_group, 0) > tier_limits.get(model_group, float("inf")):
        raise Exception(f"Rate limit for {model_group} exceeded")

@app.route('/v1/chat/completions', methods=['POST'])
def chat_completions():
    data = request.json
    api_key = request.headers.get('Authorization', '').replace('Bearer ', '')
    
    user_tier = get_user_tier(api_key)
    if not user_tier:
        return jsonify({"error": "Invalid API key"}), 401

    model = data.get('model')
    if model not in TIERS[user_tier]["models"]:
        return jsonify({"error": "Model not available for your tier"}), 403

    try:
        check_rate_limit(api_key, user_tier, model)
        response = openai.ChatCompletion.create(**data)
        return jsonify(response)
    except Exception as e:
        return jsonify({"error": str(e)}), 429

@app.route('/v1/images/generations', methods=['POST'])
def image_generations():
    data = request.json
    api_key = request.headers.get('Authorization', '').replace('Bearer ', '')
    
    user_tier = get_user_tier(api_key)
    if not user_tier:
        return jsonify({"error": "Invalid API key"}), 401

    model = data.get('model', 'dall-e-2')
    if model not in TIERS[user_tier]["models"]:
        return jsonify({"error": "Model not available for your tier"}), 403

    try:
        check_rate_limit(api_key, user_tier, model)
        response = openai.Image.create(**data)
        return jsonify(response)
    except Exception as e:
        return jsonify({"error": str(e)}), 429

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=7860)