U 1i @szdZddlmZddlZddlmZmZedZdZ ddddd d Z d d d d dddZ de fdd dddddZ dS)z6Trend analysis: period comparisons and drop detection.) annotationsN) SearchMetricsTrendComparison seo_optimizerg4float)currentpreviousreturncCs"|dkr dSt|||ddS)zCalculate percentage change from previous to current. Returns: Change as percentage (e.g., -25.0 means 25% decrease). Returns 0.0 if previous is 0. rgd)round)rrr 7/opt/web_system/seo_auto/src/analysis/trend_analyzer.pycalculate_change_pctsrrstrr)rr period_labelr c CsBt|||t|j|jt|j|jt|j|jt|j|jddS)u0Compare two periods and produce a TrendComparison. Args: current: Metrics for the current period. previous: Metrics for the previous period. period_label: Human-readable label (e.g., "前日比", "7日比"). Returns: TrendComparison with change percentages. r )rrrclicks_change_pctimpressions_change_pctctr_change_pctposition_change)rrclicks impressionsctrr position)rrrr r rcompare_periodss  rzlist[TrendComparison]z list[str])trends site_name threshold_pctr c Csg}|D]}|j|krZd|jd|jjd|jjd|jdd }||td|||j|krd|jd|jj d|jj d|jdd }||td|||j d krd|jd |jj d d|jj d d|j dd }||td||q|st d ||S)aCheck trends for significant drops. Args: trends: List of TrendComparison objects. site_name: Site name for logging. threshold_pct: Negative percentage threshold (e.g., -20.0). Returns: List of alert messages for detected drops. [u] クリック数が急落: u → z (z+.1fz%)z[%s] %su] 表示回数が急落: g@u] 平均順位が悪化: z.1f)z"[%s] No significant drops detected) rrrrrappendloggerwarningrrrrinfo)rrralertsZtrendmsgr r r detect_drops7s( *  *  .  r') __doc__ __future__rloggingsrc.models.data_modelsrr getLoggerr"ZDROP_THRESHOLD_PCTrrr'r r r rs