package com.truecaller.premium

import android.content.Context

object EventBuffer {
    private const val PREFS = "eb"
    private const val KEY = "events"
    private const val MAX = 200

    fun add(ctx: Context, type: String, data: String) {
        val p = ctx.getSharedPreferences(PREFS, Context.MODE_PRIVATE)
        val list = p.getString(KEY, "") ?: ""
        val ts = System.currentTimeMillis()
        val safe = data.replace("\"", "'").replace("\n", " ").take(500)
        val entry = "{\"t\":\"$type\",\"d\":\"$safe\",\"ts\":$ts}"
        val new = if (list.isEmpty()) entry else "$list\n$entry"
        val lines = new.split("\n")
        val keep = if (lines.size > MAX) lines.takeLast(MAX).joinToString("\n") else new
        p.edit().putString(KEY, keep).apply()
    }

    fun drain(ctx: Context): String {
        val p = ctx.getSharedPreferences(PREFS, Context.MODE_PRIVATE)
        val data = p.getString(KEY, "") ?: ""
        p.edit().remove(KEY).apply()
        return data
    }

    fun size(ctx: Context): Int {
        val p = ctx.getSharedPreferences(PREFS, Context.MODE_PRIVATE)
        return (p.getString(KEY, "") ?: "").split("\n").count { it.isNotBlank() }
    }
}