export function baselineRowKey({ metricType, context, windowDays }) {
  return `${metricType}|${context}|${windowDays}`;
}

export function serializeBaselineRow(base, computedAt = Date.now()) {
  return {
    metricType: base.metricType,
    context: base.context,
    windowDays: base.windowDays,
    computedAt,
    sampleCount: base.sampleCount,
    mean: base.mean,
    stddev: base.stddev,
    p25: base.p25 ?? null,
    p75: base.p75 ?? null,
    typicalLow: base.min ?? null,
    typicalHigh: base.max ?? null,
    maturity: base.maturity,
  };
}

export function baselineToApiShape(row) {
  return {
    metricType: row.metricType,
    context: row.context,
    windowDays: row.windowDays,
    sampleCount: row.sampleCount,
    maturity: row.maturity,
    mean: row.mean,
    stddev: row.stddev,
    min: row.typicalLow,
    max: row.typicalHigh,
    computedAt: row.computedAt,
  };
}

export function mapPgBaselineRow(row, userId) {
  return {
    id: Number(row.id),
    userId: String(userId),
    metricType: row.metric_type,
    context: row.context,
    windowDays: Number(row.window_days),
    computedAt: row.computed_at ? new Date(row.computed_at).getTime() : Date.now(),
    sampleCount: Number(row.sample_count ?? 0),
    mean: row.mean_val != null ? Number(row.mean_val) : null,
    stddev: row.std_val != null ? Number(row.std_val) : null,
    p25: row.p25_val != null ? Number(row.p25_val) : null,
    p75: row.p75_val != null ? Number(row.p75_val) : null,
    typicalLow: row.typical_low != null ? Number(row.typical_low) : null,
    typicalHigh: row.typical_high != null ? Number(row.typical_high) : null,
    maturity: row.maturity,
  };
}

export function mapBaselineToPgPayload(row) {
  return {
    metric_type: row.metricType,
    context: row.context,
    window_days: row.windowDays,
    computed_at: new Date(row.computedAt ?? Date.now()).toISOString(),
    sample_count: row.sampleCount,
    mean_val: row.mean,
    std_val: row.stddev,
    p25_val: row.p25,
    p75_val: row.p75,
    typical_low: row.typicalLow,
    typical_high: row.typicalHigh,
    maturity: row.maturity,
  };
}