module Web.View.Hubs.HubHealthHistory where

import Web.Types
import Generated.Types
import IHP.Prelude
import IHP.ViewPrelude
import Web.Routes ()
import Application.Helper.HubHealth (healthScoreBadge)

data HubHealthHistoryView = HubHealthHistoryView
    { hub       :: !Hub
    , snapshots :: ![HubHealthSnapshot]
    }

instance View HubHealthHistoryView where
    html HubHealthHistoryView { .. } = [hsx|
        <div class="flex items-center justify-between mb-6">
            <div>
                <h1 class="text-2xl font-semibold">Hub Health History</h1>
                <p class="text-sm text-gray-500">{hub.name}</p>
            </div>
            <div class="flex gap-2">
                <a href={SnapshotHubHealthAction (hub.id)}
                   class="text-sm bg-indigo-600 text-white px-3 py-1.5 rounded hover:bg-indigo-700">
                    Take Snapshot
                </a>
                <a href={ShowHubAction (hub.id)}
                   class="text-sm border border-gray-300 px-3 py-1.5 rounded hover:bg-gray-50">
                    ← Hub
                </a>
            </div>
        </div>

        {renderLatestPanel snapshots}

        {renderSnapshotsTable snapshots}
    |]

renderLatestPanel :: [HubHealthSnapshot] -> Html
renderLatestPanel [] = [hsx|<p class="text-sm text-gray-400">No snapshots yet. Take the first one.</p>|]
renderLatestPanel (latest : _) = [hsx|
    <div class="bg-white rounded-lg border border-gray-200 p-5 mb-6 flex items-center gap-6">
        <div>
            <p class="text-xs text-gray-500 mb-1">Current Health Score</p>
            <span class={"text-3xl font-bold px-3 py-1 rounded " <> healthScoreBadge latest.healthScore}>
                {show latest.healthScore}
            </span>
        </div>
        <div class="text-sm text-gray-600 space-y-1">
            <div>Open candidates: <strong>{show latest.openCandidates}</strong></div>
            <div>Regressed widgets: <strong>{show latest.regressedWidgets}</strong></div>
            <div>Stale decisions: <strong>{show latest.staleDecisions}</strong></div>
            <div>Active bottlenecks: <strong>{show latest.activeBottlenecks}</strong></div>
        </div>
    </div>
|]

renderSnapshotsTable :: [HubHealthSnapshot] -> Html
renderSnapshotsTable [] = mempty
renderSnapshotsTable snaps = [hsx|
    <div class="bg-white rounded-lg border border-gray-200 overflow-hidden">
        <table class="w-full text-sm">
            <thead class="bg-gray-50 border-b border-gray-200">
                <tr>
                    <th class="text-left px-4 py-3 font-medium text-gray-700">Score</th>
                    <th class="text-left px-4 py-3 font-medium text-gray-700">Open Cand.</th>
                    <th class="text-left px-4 py-3 font-medium text-gray-700">Regressed</th>
                    <th class="text-left px-4 py-3 font-medium text-gray-700">Stale Dec.</th>
                    <th class="text-left px-4 py-3 font-medium text-gray-700">Bottlenecks</th>
                    <th class="text-left px-4 py-3 font-medium text-gray-700">Taken At</th>
                </tr>
            </thead>
            <tbody class="divide-y divide-gray-100">
                {forEach snaps renderRow}
            </tbody>
        </table>
    </div>
|]

renderRow :: HubHealthSnapshot -> Html
renderRow s = [hsx|
    <tr class="hover:bg-gray-50">
        <td class="px-4 py-3">
            <span class={"px-2 py-0.5 rounded text-xs font-semibold " <> healthScoreBadge s.healthScore}>
                {show s.healthScore}
            </span>
        </td>
        <td class="px-4 py-3 text-gray-700">{show s.openCandidates}</td>
        <td class="px-4 py-3 text-gray-700">{show s.regressedWidgets}</td>
        <td class="px-4 py-3 text-gray-700">{show s.staleDecisions}</td>
        <td class="px-4 py-3 text-gray-700">{show s.activeBottlenecks}</td>
        <td class="px-4 py-3 text-xs text-gray-400">{show s.computedAt}</td>
    </tr>
|]