module Web.View.Hubs.OperationalReviewBoard where

import Web.Types
import Generated.Types
import IHP.Prelude
import IHP.ViewPrelude
import Web.Routes ()
import Application.Helper.HubHealth (healthScoreBadge)
import Application.Helper.FrictionScore (scoreBand)
import Web.View.Hubs.BottleneckDashboard (severityBadge)

data OperationalReviewBoardView = OperationalReviewBoardView
    { hubs              :: ![Hub]
    , allSnapshots      :: ![HubHealthSnapshot]
    , topFrictionScores :: ![FrictionScore]
    , topWidgets        :: ![Widget]
    , bottlenecks       :: ![BottleneckRecord]
    , openPropagations  :: ![CrossHubPropagation]
    }

instance View OperationalReviewBoardView where
    html OperationalReviewBoardView { .. } = [hsx|
        <div class="flex items-center justify-between mb-6">
            <h1 class="text-2xl font-semibold">Operational Review Board</h1>
        </div>

        <!-- Panel 1: Hub health matrix -->
        <div class="bg-white rounded-lg border border-gray-200 p-5 mb-4">
            <h2 class="text-sm font-semibold text-gray-700 mb-3">Hub Health Matrix</h2>
            {renderHubHealthTable hubs}
        </div>

        <!-- Panel 2: Top friction widgets -->
        <div class="bg-white rounded-lg border border-gray-200 p-5 mb-4">
            <h2 class="text-sm font-semibold text-gray-700 mb-3">Top Friction Widgets</h2>
            {renderFrictionTable topFrictionScores topWidgets}
        </div>

        <!-- Panel 3: Active bottlenecks by stage -->
        <div class="bg-white rounded-lg border border-gray-200 p-5 mb-4">
            <h2 class="text-sm font-semibold text-gray-700 mb-3">Active Bottlenecks by Stage</h2>
            {renderBottlenecksPanel bottlenecks}
        </div>

        <!-- Panel 4: Open cross-hub propagations -->
        <div class="bg-white rounded-lg border border-gray-200 p-5">
            <h2 class="text-sm font-semibold text-gray-700 mb-3">Open Cross-Hub Propagations</h2>
            {renderPropagationsPanel openPropagations}
        </div>
    |]
      where
        stages = ["candidate", "requirement", "decision", "observation"] :: [Text]
        stageLabel s = case s of
            "candidate"   -> "Candidate"
            "requirement" -> "Requirement"
            "decision"    -> "Decision"
            "observation" -> "Observation"
            _             -> s

        latestSnapshotFor hub =
            find (\s -> s.hubId == hub.id) allSnapshots

        renderHubRow :: Hub -> Html
        renderHubRow h =
            let mSnap = latestSnapshotFor h
            in [hsx|
            <tr class="hover:bg-gray-50">
                <td class="px-3 py-2">
                    <a href={ShowHubAction (h.id)}
                       class="text-indigo-600 hover:underline">{h.name}</a>
                </td>
                <td class="px-3 py-2">
                    {renderHealthScore mSnap}
                </td>
                <td class="px-3 py-2 text-xs text-gray-400">
                    {maybe "never" (\s -> show s.computedAt) mSnap}
                </td>
                <td class="px-3 py-2 text-right">
                    <a href={HubHealthHistoryAction (h.id)}
                       class="text-xs text-indigo-600 hover:underline">History</a>
                </td>
            </tr>
            |]

        renderFrictionRow :: (FrictionScore, Widget) -> Html
        renderFrictionRow (fs, w) = [hsx|
            <tr class="hover:bg-gray-50">
                <td class="px-3 py-2">
                    <a href={ShowWidgetAction (w.id)}
                       class="text-indigo-600 hover:underline">{w.name}</a>
                </td>
                <td class="px-3 py-2">
                    <span class={"px-2 py-0.5 rounded text-xs font-semibold " <> scoreBand fs.score}>
                        {show fs.score}
                    </span>
                </td>
                <td class="px-3 py-2 text-gray-500 text-xs">{w.widgetType}</td>
            </tr>
            |]

        renderBottleneckStage :: Text -> Html
        renderBottleneckStage stage =
            let stageBNs = filter (\b -> b.stage == stage) bottlenecks
                cnt      = length stageBNs
                hasCrit  = any (\b -> b.severity == "critical") stageBNs
                colourCls = (if cnt == 0 then "bg-gray-50 text-gray-400"
                             else if hasCrit then "bg-red-50 text-red-700"
                             else "bg-orange-50 text-orange-700") :: Text
            in [hsx|
            <div class={"rounded-lg p-4 text-center " <> colourCls}>
                <div class="text-2xl font-bold">{show cnt}</div>
                <div class="text-xs mt-1">{stageLabel stage}</div>
            </div>
            |]

        renderPropagationRow :: CrossHubPropagation -> Html
        renderPropagationRow p = [hsx|
            <div class="flex items-start justify-between p-3 bg-gray-50 rounded border border-gray-200">
                <div>
                    <span class="text-xs bg-purple-100 text-purple-700 px-1.5 py-0.5 rounded mr-2">{p.patternType}</span>
                    <span class="text-sm text-gray-700">{p.summary}</span>
                    <p class="text-xs text-gray-400 mt-0.5">{show p.detectedAt}</p>
                </div>
                <div class="flex gap-2 ml-4">
                    <a href={AcknowledgePropagationAction (p.id)}
                       class="text-xs text-yellow-600 hover:underline whitespace-nowrap">Acknowledge</a>
                    <a href={ResolvePropagationAction (p.id)}
                       class="text-xs text-green-600 hover:underline">Resolve</a>
                </div>
            </div>
            |]

        renderHubHealthTable :: [Hub] -> Html
        renderHubHealthTable [] = [hsx|<p class="text-sm text-gray-400">No hubs registered.</p>|]
        renderHubHealthTable hs = [hsx|
            <table class="w-full text-sm">
                <thead class="bg-gray-50">
                    <tr>
                        <th class="text-left px-3 py-2 font-medium text-gray-600">Hub</th>
                        <th class="text-left px-3 py-2 font-medium text-gray-600">Health</th>
                        <th class="text-left px-3 py-2 font-medium text-gray-600">Snapshot</th>
                        <th class="px-3 py-2"></th>
                    </tr>
                </thead>
                <tbody class="divide-y divide-gray-100">
                    {forEach hs renderHubRow}
                </tbody>
            </table>
        |]

        renderFrictionTable :: [FrictionScore] -> [Widget] -> Html
        renderFrictionTable [] _ = [hsx|<p class="text-sm text-gray-400">No friction scores computed yet.</p>|]
        renderFrictionTable scores ws = [hsx|
            <table class="w-full text-sm">
                <thead class="bg-gray-50">
                    <tr>
                        <th class="text-left px-3 py-2 font-medium text-gray-600">Widget</th>
                        <th class="text-left px-3 py-2 font-medium text-gray-600">Score</th>
                        <th class="text-left px-3 py-2 font-medium text-gray-600">Type</th>
                    </tr>
                </thead>
                <tbody class="divide-y divide-gray-100">
                    {forEach (zip scores ws) renderFrictionRow}
                </tbody>
            </table>
        |]

        renderBottlenecksPanel :: [BottleneckRecord] -> Html
        renderBottlenecksPanel [] = [hsx|<p class="text-sm text-gray-400">No active bottlenecks.</p>|]
        renderBottlenecksPanel _ = [hsx|
            <div class="grid grid-cols-4 gap-3">
                {forEach stages renderBottleneckStage}
            </div>
        |]

        renderPropagationsPanel :: [CrossHubPropagation] -> Html
        renderPropagationsPanel [] = [hsx|<p class="text-sm text-gray-400">No open propagation events.</p>|]
        renderPropagationsPanel ps = [hsx|
            <div class="space-y-2">
                {forEach ps renderPropagationRow}
            </div>
        |]

renderHealthScore :: Maybe HubHealthSnapshot -> Html
renderHealthScore Nothing  = [hsx|<span class="text-xs text-gray-400">–</span>|]
renderHealthScore (Just s) = [hsx|
    <span class={"px-2 py-0.5 rounded text-xs font-semibold " <> healthScoreBadge s.healthScore}>
        {show s.healthScore}
    </span>
|]