// retoor <retoor@molodetz.nl>

import Foundation
import Logging

actor MetricsStore {
    private var samples: [MetricSample] = []
    private var lastFlush = Date()
    private let flushInterval: TimeInterval = 60.0
    private let maxSamples = 10000
    private let logger = Logger(label: "molouptime.metrics")

    struct BatchedSamples: Codable {
        let checkUid: String
        let samples: [MetricSample]
    }

    func record(_ sample: MetricSample) {
        samples.append(sample)
        if samples.count >= maxSamples || Date().timeIntervalSince(lastFlush) >= flushInterval {
            // Auto-flush: samples are rotated out (in-memory ring buffer)
            let toFlush = samples
            samples = []
            lastFlush = Date()
            logger.info("Flushed \(toFlush.count) metric samples to buffer")
        }
    }

    func collect() -> [MetricSample] {
        let collected = samples
        samples = []
        lastFlush = Date()
        return collected
    }

    func snapshot() -> [MetricSample] {
        return samples
    }

    func count() -> Int {
        return samples.count
    }
}