"use strict";
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
    return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var __metadata = (this && this.__metadata) || function (k, v) {
    if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.CacheMiddleware = void 0;
const common_1 = require("@nestjs/common");
const etag_cache_service_1 = require("../cache/etag-cache.service");
let CacheMiddleware = class CacheMiddleware {
    constructor(cacheService) {
        this.cacheService = cacheService;
    }
    use(req, res, next) {
        if (req.method !== 'GET') {
            return next();
        }
        const cacheControl = req.headers['cache-control'];
        const skipCache = req.headers['x-skip-cache'];
        if (cacheControl === 'no-cache' || skipCache === 'true') {
            return next();
        }
        const clientEtag = req.headers['if-none-match'];
        if (!clientEtag) {
            return next();
        }
        const queryString = Object.keys(req.query).length > 0 ? JSON.stringify(req.query) : '';
        const cacheKey = `${req.url}:${queryString}`;
        const cached = this.cacheService.get(cacheKey);
        if (cached && clientEtag === cached.etag) {
            res.setHeader('ETag', cached.etag);
            res.status(304).send();
            return;
        }
        res.locals.cacheKey = cacheKey;
        next();
    }
};
exports.CacheMiddleware = CacheMiddleware;
exports.CacheMiddleware = CacheMiddleware = __decorate([
    (0, common_1.Injectable)(),
    __metadata("design:paramtypes", [etag_cache_service_1.ETagCacheService])
], CacheMiddleware);
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