"use strict";
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    return function (target, key) { decorator(target, key, paramIndex); }
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.CompressCacheInterceptor = void 0;
const common_1 = require("@nestjs/common");
const rxjs_1 = require("rxjs");
const operators_1 = require("rxjs/operators");
const cache_manager_1 = require("@nestjs/cache-manager");
const zlib = __importStar(require("zlib"));
const util_1 = require("util");
const core_1 = require("@nestjs/core");
const gzip = (0, util_1.promisify)(zlib.gzip);
const gunzip = (0, util_1.promisify)(zlib.gunzip);
const COMPRESSION_THRESHOLD = 100;
let CompressCacheInterceptor = class CompressCacheInterceptor {
    constructor(cacheManager, httpAdapterHost) {
        this.cacheManager = cacheManager;
        this.httpAdapterHost = httpAdapterHost;
    }
    async intercept(context, next) {
        const httpAdapter = this.httpAdapterHost.httpAdapter;
        const request = context.getArgByIndex(0);
        const response = context.getArgByIndex(1);
        if (httpAdapter.getRequestMethod(request) !== 'GET') {
            return next.handle();
        }
        const cacheKey = httpAdapter.getRequestUrl(request);
        let cachedData = await this.cacheManager.get(cacheKey);
        if (cachedData) {
            try {
                if (Buffer.isBuffer(cachedData) && cachedData.length > 2 && cachedData[0] === 0x1f && cachedData[1] === 0x8b) {
                    const decompressed = await gunzip(cachedData);
                    const jsonString = decompressed.toString('utf8');
                    httpAdapter.setHeader(response, 'Content-Type', 'application/json');
                    httpAdapter.setHeader(response, 'X-Cache', 'HIT (Compressed)');
                    return (0, rxjs_1.of)(JSON.parse(jsonString));
                }
                else {
                    const jsonString = cachedData.toString();
                    httpAdapter.setHeader(response, 'Content-Type', 'application/json');
                    httpAdapter.setHeader(response, 'X-Cache', 'HIT (Uncompressed)');
                    return (0, rxjs_1.of)(JSON.parse(jsonString));
                }
            }
            catch (e) {
                console.error(`[Cache] Lỗi giải nén dữ liệu cache cho key ${cacheKey}:`, e);
                await this.cacheManager.del(cacheKey);
            }
        }
        httpAdapter.setHeader(response, 'X-Cache', 'MISS');
        return next.handle().pipe((0, operators_1.tap)(async (data) => {
            if (!data)
                return;
            const jsonString = JSON.stringify(data);
            const ttl = 60000;
            if (jsonString.length > COMPRESSION_THRESHOLD) {
                try {
                    const compressed = await gzip(Buffer.from(jsonString, 'utf8'));
                    await this.cacheManager.set(cacheKey, compressed, ttl);
                    console.log(`[Cache] 📦 Đã nén dữ liệu cho: ${cacheKey} (${jsonString.length} -> ${compressed.length} bytes)`);
                }
                catch (e) {
                    console.error(`[Cache] Lỗi nén dữ liệu cho key ${cacheKey}:`, e);
                    await this.cacheManager.set(cacheKey, jsonString, ttl);
                }
            }
            else {
                await this.cacheManager.set(cacheKey, jsonString, ttl);
            }
        }));
    }
};
exports.CompressCacheInterceptor = CompressCacheInterceptor;
exports.CompressCacheInterceptor = CompressCacheInterceptor = __decorate([
    (0, common_1.Injectable)(),
    __param(0, (0, common_1.Inject)(cache_manager_1.CACHE_MANAGER)),
    __metadata("design:paramtypes", [Object, core_1.HttpAdapterHost])
], CompressCacheInterceptor);
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