module Web.View.LearningDashboard.Show where

import Web.View.Prelude
import Data.Time (diffUTCTime, getCurrentTime, nominalDay)

data ShowView = ShowView
    { topCorrelations     :: ![OutcomeCorrelation]
    , patternRankings     :: ![PatternPerformanceRecord]
    , thresholdStatus     :: ![(Hub, Maybe AdaptiveThresholdConfig)]
    , recentInsights      :: ![LearningInsight]
    , knowledgeHighlights :: ![InstitutionalKnowledgeEntry]
    }

instance View ShowView where
    html ShowView { .. } = [hsx|
        <div class="p-6">
            <h1 class="text-2xl font-bold text-gray-900 mb-6">Learning Dashboard</h1>

            <div class="grid grid-cols-1 lg:grid-cols-2 gap-6 mb-6">

                {-- Panel 1: Top annotation predictors --}
                <div class="bg-white shadow rounded-lg p-5">
                    <h2 class="text-base font-semibold text-gray-800 mb-4">Top Annotation Predictors</h2>
                    {if null topCorrelations
                        then [hsx|<p class="text-sm text-gray-400">No data — run correlation analysis per hub.</p>|]
                        else [hsx|
                            <div class="space-y-2">
                                {forM_ topCorrelations renderCorrelation}
                            </div>
                        |]}
                </div>

                {-- Panel 2: Pattern performance ranking --}
                <div class="bg-white shadow rounded-lg p-5">
                    <h2 class="text-base font-semibold text-gray-800 mb-4">Pattern Performance Ranking</h2>
                    {if null patternRankings
                        then [hsx|<p class="text-sm text-gray-400">No data — run pattern performance per hub.</p>|]
                        else [hsx|
                            <div class="space-y-2">
                                {forM_ patternRankings renderPatternRank}
                            </div>
                        |]}
                </div>

            </div>

            <div class="grid grid-cols-1 lg:grid-cols-3 gap-6">

                {-- Panel 3: Adaptive threshold status --}
                <div class="bg-white shadow rounded-lg p-5">
                    <h2 class="text-base font-semibold text-gray-800 mb-4">Adaptive Threshold Status</h2>
                    <div class="space-y-2">
                        {forM_ thresholdStatus renderThresholdStatus}
                    </div>
                </div>

                {-- Panel 4: Recent learning insights --}
                <div class="bg-white shadow rounded-lg p-5">
                    <h2 class="text-base font-semibold text-gray-800 mb-4">Recent Insights</h2>
                    {if null recentInsights
                        then [hsx|<p class="text-sm text-gray-400">No insights yet.</p>|]
                        else [hsx|
                            <div class="space-y-3">
                                {forM_ recentInsights renderInsight}
                            </div>
                        |]}
                </div>

                {-- Panel 5: Knowledge base highlights --}
                <div class="bg-white shadow rounded-lg p-5">
                    <h2 class="text-base font-semibold text-gray-800 mb-4">Knowledge Highlights</h2>
                    {if null knowledgeHighlights
                        then [hsx|<p class="text-sm text-gray-400">No entries yet — distil a decision.</p>|]
                        else [hsx|
                            <div class="space-y-3">
                                {forM_ knowledgeHighlights renderKnowledge}
                            </div>
                        |]}
                </div>

            </div>
        </div>
    |]
      where
        renderCorrelation c = [hsx|
            <div class="flex items-center gap-3">
                <span class="text-sm text-gray-700 w-32 truncate">{c.annotationCategory}</span>
                <div class="flex-1 bg-gray-200 rounded-full h-2">
                    <div class={barColor c.correlationScore}
                         style={"width:" <> show (round (c.correlationScore * 100) :: Int) <> "%"}></div>
                </div>
                <span class="text-xs text-gray-500">{show (round (c.correlationScore * 100) :: Int)}%</span>
            </div>
        |]

        barColor s
            | s >= 0.7  = "h-2 rounded-full bg-green-500" :: Text
            | s >= 0.4  = "h-2 rounded-full bg-yellow-500"
            | otherwise = "h-2 rounded-full bg-red-400"

        renderPatternRank r =
            let rate = if r.totalOutcomeCount > 0
                        then fromIntegral r.positiveOutcomeCount / fromIntegral r.totalOutcomeCount :: Double
                        else 0.0
            in [hsx|
            <div class="flex items-center gap-2">
                <span class="text-xs text-gray-400 w-5">{maybe "-" show r.outcomeRank}</span>
                <a href={ShowWidgetPatternAction { widgetPatternId = r.widgetPatternId }}
                   class="text-sm text-blue-600 hover:underline truncate flex-1">
                    {show r.widgetPatternId}
                </a>
                <span class="text-xs text-gray-500">{show (round (rate * 100) :: Int)}%</span>
            </div>
        |]

        renderThresholdStatus (h, mCfg) =
            let driftClass = case mCfg of
                    Nothing  -> "text-red-500" :: Text
                    Just cfg -> "text-green-600"
                label = case mCfg of
                    Nothing  -> "Not calibrated"
                    Just cfg -> "Calibrated"
            in [hsx|
            <div class="flex justify-between text-sm">
                <span class="text-gray-700">{h.name}</span>
                <span class={driftClass}>{label}</span>
            </div>
        |]

        renderInsight i = [hsx|
            <div class="border-l-4 border-indigo-400 pl-3">
                <p class="text-xs font-medium text-gray-700">{i.title}</p>
                <p class="text-xs text-gray-400">{insightTypeBadge i.insightType}</p>
            </div>
        |]

        insightTypeBadge t = case t of
            "annotation_predictor"  -> "Annotation predictor" :: Text
            "threshold_calibration" -> "Threshold calibration"
            "pattern_ranking"       -> "Pattern ranking"
            "routing_improvement"   -> "Routing improvement"
            _                       -> t

        renderKnowledge e = [hsx|
            <div>
                <a href={ShowInstitutionalKnowledgeAction { knowledgeEntryId = e.id }}
                   class="text-sm text-blue-600 hover:underline">
                    {take 80 e.summary <> if length e.summary > 80 then "…" else ""}
                </a>
            </div>
        |]