/*
=== Core: Impression Recovery Boost ===
Version: 1.0
Docs: merchjar.com/templates?t=core-impression-recovery-boost

Purpose: Increases bids for proven performers when impression volume drops significantly.
Dataset: Keywords & Targets
Recommended: Change Bid: Set ($) using $target_bid | Daily
Tags: bid, default
Risk: bids
Schedule: daily
Goal: grow
Requires-Properties: none
Pairs-With: build-segment, check-segments
Last-Updated: 2026-06-15
Min-Pack-Version: 1.0.0
*/

// === Core Settings ===
let $orders_min_lifetime = 15;                  // CORE: Minimum lifetime orders to qualify as "proven performer"
let $orders_min_baseline = 2;                   // CORE: Minimum orders in baseline period for data reliability
let $impression_drop_threshold = 40%;           // CORE: Act when impressions drop at least 40% from baseline
let $bid_change_increase = 10%;                 // CORE: Bid increase amount when conditions are met

// === Strategy Settings ===
let $t_acos_threshold_increase = 120%;          // STRATEGY: Only increase if ACOS <= (Target ACOS x 120%) [e.g., 30% target = 36% threshold]
let $impressions_min_daily = 50;                // STRATEGY: Minimum daily impressions for reliable analysis

// === Time Periods ===
let $period_recent = 7d;                        // TIME: Recent period for drop detection
let $period_baseline = 30d;                     // TIME: Baseline comparison period
let $cooldown_period = 3d;                      // TIME: Wait 3 days after bid change before adjusting again

// === Advanced Settings ===
let $bid_limit_cpc_multiplier = 2.0;            // SAFEGUARD: Max bid = Avg CPC x 2.0 [e.g., $0.50 CPC = $1.00 max]
let $bid_limit_cpc_period = 90d;                // SAFEGUARD: Period for calculating CPC-based bid limits

// === Segment Filters ===
let $include_campaigns = [""];                  // FILTER: Apply to all campaigns, or specify terms like ["SP-", "Auto"]
let $exclude_campaigns = ["NEVER_MATCH"];       // FILTER: Exclude campaigns containing these terms, e.g., ["Brand", "Test"]

// ============================================================================
// === Segment Logic ===
// ============================================================================
// Advanced logic below - modify carefully

// === Impression Analysis ===
let $recent_impressions = impressions($period_recent);
let $baseline_impressions = impressions($period_baseline);

let $recent_days = interval($period_recent) / 86400;
let $baseline_days = interval($period_baseline) / 86400;

let $recent_daily_avg = $recent_impressions / $recent_days;
let $baseline_daily_avg = $baseline_impressions / $baseline_days;

let $impression_drop_ratio = case(
    $baseline_daily_avg > 0 => $recent_daily_avg / $baseline_daily_avg,
    else 1  // No baseline data = no drop detected
);

let $impression_drop_percent = case(
    $baseline_daily_avg > 0 => (($baseline_daily_avg - $recent_daily_avg) / $baseline_daily_avg) * 100,
    else 0  // No baseline data = no drop
);

// === Performance Protection ===
let $baseline_orders = orders($period_baseline);
let $baseline_acos = acos($period_baseline);

let $acos_acceptable = case(
    target acos > 0 and $baseline_orders >= $orders_min_baseline and $baseline_acos <= (target acos * $t_acos_threshold_increase) => 1,
    else 0
);

// === Bid Calculation ===
let $calculated_target_bid = bid * (1 + $bid_change_increase);

// === Dynamic Bid Cap ===
let $avg_cpc = cpc($bid_limit_cpc_period);

let $dynamic_cap = case(
    $avg_cpc > 0 => $avg_cpc * $bid_limit_cpc_multiplier,
    else 999  // No cap if no CPC history
);

let $target_bid = case(
    $calculated_target_bid > $dynamic_cap => $dynamic_cap,
    $calculated_target_bid < 0.02 => 0.02,
    else $calculated_target_bid
);

// === Cooldown Check ===
// NOTE: Cooldown is intentionally short (3d) - missing a boost window has a real cost for impression-starved targets
let $cooldown_cutoff = now() - interval($cooldown_period);

let $timing_ready = case(
    is_null(last bid change) => 1,
    last bid change < $cooldown_cutoff => 1,
    else 0
);

// === Qualification Logic ===
let $impression_drop_detected = case(
    $impression_drop_percent >= ($impression_drop_threshold * 100) => 1,
    else 0
);

let $action_needed = case(
    target acos <= 0 => 0,                       // Invalid target
    orders(lifetime) < $orders_min_lifetime => 0, // Not proven performer
    $baseline_daily_avg < $impressions_min_daily => 0, // Insufficient baseline data
    $impression_drop_detected = 0 => 0,          // No drop detected
    $acos_acceptable = 0 => 0,                   // Poor baseline performance
    $timing_ready = 0 => 0,                      // Cooldown active
    $target_bid <= bid => 0,                     // No increase calculated
    else 1
);

// === Diagnostic Properties ===
let $reason = case(
    target acos <= 0 => "No target ACOS set",
    orders(lifetime) < $orders_min_lifetime => "Insufficient lifetime orders to qualify as proven performer",
    $baseline_daily_avg < $impressions_min_daily => "Baseline impression volume too low for reliable analysis",
    $impression_drop_detected = 0 => "No significant impression drop detected",
    $acos_acceptable = 0 => "Baseline ACOS exceeds acceptable threshold for bid increase",
    $timing_ready = 0 => "Recently changed - cooldown active",
    $target_bid <= bid => "No bid increase calculated",
    $calculated_target_bid > $dynamic_cap => "Impression drop detected - bid capped by CPC limit",
    $action_needed = 1 => "Impression drop detected on proven performer - increasing bid",
    else "Stable impression volume"
);

let $planned_action = case(
    $action_needed = 1 => case(
        $impression_drop_percent >= 75 => "Bid Increase: Major Drop (75%+)",
        $impression_drop_percent >= 50 => "Bid Increase: Significant Drop (50-75%)",
        $calculated_target_bid > $dynamic_cap => "Bid Increase: CPC Limited",
        else "Bid Increase: Moderate Drop"
    ),
    $impression_drop_percent >= 75 => "Major Drop (75%+) - No Action",
    $impression_drop_percent >= 50 => "Significant Drop (50-75%) - No Action",
    $impression_drop_percent >= 25 => "Moderate Drop (25-50%) - No Action",
    $impression_drop_percent > 0 => "Minor Drop (<25%) - No Action",
    $impression_drop_percent < 0 => "Impressions Increased - No Action",
    else "No Change Detected"
);

// === Final Filter ===
state = "effectively enabled"
and (campaign name contains any $include_campaigns)
and (campaign name does not contain all $exclude_campaigns)
and $action_needed = 1