"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);
};
var __param = (this && this.__param) || function (paramIndex, decorator) {
    return function (target, key) { decorator(target, key, paramIndex); }
};
var UsageService_1;
var _a;
Object.defineProperty(exports, "__esModule", { value: true });
exports.UsageService = void 0;
const common_1 = require("@nestjs/common");
const typeorm_1 = require("@nestjs/typeorm");
const typeorm_2 = require("typeorm");
const usage_entity_1 = require("./usage.entity");
const redis_service_1 = require("../common/redis.service");
let UsageService = UsageService_1 = class UsageService {
    usageRepository;
    redisService;
    logger = new common_1.Logger(UsageService_1.name);
    constructor(usageRepository, redisService) {
        this.usageRepository = usageRepository;
        this.redisService = redisService;
    }
    async recordRequest(data) {
        this.usageRepository.save(data).catch((err) => {
            this.logger.error(`Failed to save usage log to DB: ${err.message}`);
        });
        const monthKey = this.getMonthlyKey(data.tenantId);
        try {
            await this.redisService.getClient().incr(monthKey);
        }
        catch (err) {
            this.logger.error(`Failed to increment Redis usage counter: ${err.message}`);
        }
    }
    async getMonthlyUsage(tenantId) {
        const key = this.getMonthlyKey(tenantId);
        const val = await this.redisService.getClient().get(key);
        return val ? parseInt(val, 10) : 0;
    }
    async checkQuota(tenantId, limit) {
        const used = await this.getMonthlyUsage(tenantId);
        return {
            allowed: used < limit,
            used,
        };
    }
    async checkRateLimit(tenantId, limit) {
        const key = this.getRateLimitKey(tenantId);
        try {
            const client = this.redisService.getClient();
            const usedRaw = await client.get(key);
            const used = usedRaw ? parseInt(usedRaw, 10) : 0;
            if (used >= limit) {
                return { allowed: false, used };
            }
            const multi = client.multi();
            multi.incr(key);
            if (!usedRaw) {
                multi.expire(key, 60);
            }
            await multi.exec();
            return { allowed: true, used: used + 1 };
        }
        catch (err) {
            this.logger.error(`Rate limit check failed for ${tenantId}: ${err.message}`);
            return { allowed: true, used: 0 };
        }
    }
    async getUsageHistory(tenantId, days = 30) {
        return this.usageRepository
            .createQueryBuilder('usage')
            .select("DATE_TRUNC('day', usage.createdAt)", 'date')
            .addSelect('COUNT(*)', 'count')
            .where('usage.tenantId = :tenantId', { tenantId })
            .andWhere("usage.createdAt >= NOW() - (:days || ' days')::INTERVAL", { days: days.toString() })
            .groupBy("DATE_TRUNC('day', usage.createdAt)")
            .orderBy('date', 'ASC')
            .getRawMany();
    }
    async getUsageSummary(tenantId, plan = 'FREE') {
        const monthlyUsage = await this.getMonthlyUsage(tenantId);
        const QUOTA_LIMITS = {
            'FREE': 8000,
            'PRO': 50000,
            'ENTERPRISE': 1000000
        };
        const monthlyLimit = QUOTA_LIMITS[plan] || 8000;
        const stats = await this.usageRepository
            .createQueryBuilder('usage')
            .select('COUNT(*)', 'totalToday')
            .addSelect('AVG(usage.responseTimeMs)', 'avgLatency')
            .addSelect('COUNT(CASE WHEN usage.statusCode >= 200 AND usage.statusCode < 300 THEN 1 END)', 'successCount')
            .where('usage.tenantId = :tenantId', { tenantId })
            .andWhere('usage.createdAt >= CURRENT_DATE')
            .getRawOne();
        const totalToday = parseInt(stats.totalToday || '0', 10);
        const avgLatency = Math.round(parseFloat(stats.avgLatency || '0'));
        const successRate = totalToday > 0
            ? Math.round((parseInt(stats.successCount || '0', 10) / totalToday) * 100)
            : 100;
        return {
            monthlyUsage,
            monthlyLimit,
            totalToday,
            avgLatency,
            successRate,
            lastUpdated: new Date()
        };
    }
    getMonthlyKey(tenantId) {
        const now = new Date();
        const yearMonth = `${now.getFullYear()}-${String(now.getMonth() + 1).padStart(2, '0')}`;
        return `usage:${tenantId}:${yearMonth}`;
    }
    getRateLimitKey(tenantId) {
        const now = new Date();
        const window = `${now.getFullYear()}${now.getMonth()}${now.getDate()}${now.getHours()}${now.getMinutes()}`;
        return `ratelimit:${tenantId}:${window}`;
    }
};
exports.UsageService = UsageService;
exports.UsageService = UsageService = UsageService_1 = __decorate([
    (0, common_1.Injectable)(),
    __param(0, (0, typeorm_1.InjectRepository)(usage_entity_1.UsageLog)),
    __metadata("design:paramtypes", [typeof (_a = typeof typeorm_2.Repository !== "undefined" && typeorm_2.Repository) === "function" ? _a : Object, redis_service_1.RedisService])
], UsageService);
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