module Web.View.ApiDashboard.Show where

import Web.Types
import Generated.Types
import IHP.Prelude
import IHP.ViewPrelude
import Web.Routes ()
import Data.Maybe (fromMaybe)

data ConsumerStats = ConsumerStats
    { consumer    :: !ApiConsumer
    , requests24h :: !Int
    , errorRate   :: !Double    -- fraction 0..1
    , lastSeen    :: !(Maybe UTCTime)
    }

data ShowView = ShowView { stats :: ![ConsumerStats] }

instance View ShowView where
    html ShowView { .. } = [hsx|
        <div class="flex items-center justify-between mb-6">
            <div>
                <h1 class="text-2xl font-semibold">API Usage Dashboard</h1>
                <p class="text-sm text-gray-500 mt-1">Per-consumer request metrics (last 24 hours)</p>
            </div>
            <a href={ApiConsumersAction} class="text-sm text-gray-500 hover:text-gray-700">← Consumers</a>
        </div>
        {if null stats then noStatsMsg else statsTable}
    |]
      where
        noStatsMsg = [hsx|<p class="text-sm text-gray-400">No API activity yet.</p>|]
        statsTable = [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">
                        <tr>
                            <th class="text-left px-4 py-3 font-medium text-gray-600">Consumer</th>
                            <th class="text-right px-4 py-3 font-medium text-gray-600">Req (24h)</th>
                            <th class="text-right px-4 py-3 font-medium text-gray-600">Error Rate</th>
                            <th class="text-left px-4 py-3 font-medium text-gray-600">Last Seen</th>
                            <th class="text-left px-4 py-3 font-medium text-gray-600">Manifest</th>
                        </tr>
                    </thead>
                    <tbody class="divide-y divide-gray-100">
                        {forEach stats renderRow}
                    </tbody>
                </table>
            </div>
        |]
        renderRow ConsumerStats { .. } = [hsx|
            <tr class="hover:bg-gray-50">
                <td class="px-4 py-3 font-medium">
                    <a href={ShowApiConsumerAction consumer.id} class="text-indigo-600 hover:underline">
                        {consumer.name}
                    </a>
                </td>
                <td class="px-4 py-3 text-right">{show requests24h}</td>
                <td class="px-4 py-3 text-right">
                    <span class={errorClass errorRate}>
                        {formatErrorRate errorRate}%
                    </span>
                </td>
                <td class="px-4 py-3 text-gray-500 text-xs">
                    {maybe "never" show lastSeen}
                </td>
                <td class="px-4 py-3 text-gray-500">
                    {if isJust consumer.hubCapabilityManifestId then "✓" else "–" :: Text}
                </td>
            </tr>
        |]
        errorClass rate
            | rate > 0.1 = "text-red-600 font-medium" :: Text
            | rate > 0.02 = "text-amber-600"
            | otherwise  = "text-gray-600"
        formatErrorRate rate = show (round (rate * 100) :: Int)