package com.applicaster.oasisplayer.som

import com.applicaster.oasisplayer.som.adrules.AdExcludeRule
import com.applicaster.oasisplayer.som.adrules.AdRule

class SomAdOffsetBuilder {
    fun build(somConfig: SomConfig): List<String> {
        val finalConfig = mutableListOf<String>()
        somConfig.apply {
            when (adExcludeRule) {
                AdExcludeRule.PRE_ROLL -> {
                    finalConfig.addAll(midrollOffsetsSec)
                    finalConfig.addIfNecessary(adRules, AdRule.POST_ROLL)
                }
                AdExcludeRule.POST_ROLL -> {
                    finalConfig.addIfNecessary(adRules, AdRule.PRE_ROLL)
                    finalConfig.addAll(midrollOffsetsSec)
                }
                AdExcludeRule.MID_ROLL -> {
                    finalConfig.addIfNecessary(adRules, AdRule.PRE_ROLL)
                    finalConfig.addIfNecessary(adRules, AdRule.POST_ROLL)
                }
                AdExcludeRule.NOTHING -> {
                    finalConfig.addIfNecessary(adRules, AdRule.PRE_ROLL)
                    finalConfig.addAll(midrollOffsetsSec)
                    finalConfig.addIfNecessary(adRules, AdRule.POST_ROLL)
                }
            }
        }
        return finalConfig
    }

    private fun MutableList<String>.addIfNecessary(adRules: List<AdRule>, adRule: AdRule) {
        if (adRules.contains(adRule))
            add(adRule.somKey)
    }
}