module Web.View.Requirements.Index where

import Web.Types
import Generated.Types
import IHP.Prelude
import IHP.ViewPrelude
import Web.Routes ()

data IndexView = IndexView
    { requirements :: ![Requirement]
    , candidates   :: ![RequirementCandidate]
    }

instance View IndexView where
    html IndexView { .. } = [hsx|
        <div class="flex items-center justify-between mb-6">
            <h1 class="text-2xl font-semibold">Requirements</h1>
        </div>
        {renderRequirementsSection requirements candidates}
    |]

renderRequirementsSection :: [Requirement] -> [RequirementCandidate] -> Html
renderRequirementsSection [] _ = [hsx|<p class="text-sm text-gray-400">No requirements yet. Promote an accepted candidate to create one.</p>|]
renderRequirementsSection reqs candidates = renderTable reqs candidates

renderTable :: [Requirement] -> [RequirementCandidate] -> Html
renderTable reqs candidates = [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-600">Title</th>
                    <th class="text-left px-4 py-3 font-medium text-gray-600">Status</th>
                    <th class="text-left px-4 py-3 font-medium text-gray-600">Source Candidate</th>
                    <th class="text-left px-4 py-3 font-medium text-gray-600">Created</th>
                </tr>
            </thead>
            <tbody class="divide-y divide-gray-100">
                {forEach reqs (renderRow candidates)}
            </tbody>
        </table>
    </div>
|]

renderRow :: [RequirementCandidate] -> Requirement -> Html
renderRow candidates req = [hsx|
    <tr class="hover:bg-gray-50">
        <td class="px-4 py-3">
            <a href={ShowRequirementAction (req.id)}
               class="text-indigo-600 hover:text-indigo-800 font-medium">{req.title}</a>
        </td>
        <td class="px-4 py-3">
            <span class={reqStatusClass req.status <> " text-xs px-2 py-0.5 rounded font-medium"}>
                {req.status}
            </span>
        </td>
        <td class="px-4 py-3 text-gray-600">
            {candidateTitle candidates req.sourceCandidateId}
        </td>
        <td class="px-4 py-3 text-gray-400 text-xs">{show req.createdAt}</td>
    </tr>
|]

candidateTitle :: [RequirementCandidate] -> Id RequirementCandidate -> Text
candidateTitle cs cid =
    maybe "(unknown)" (.title) (find (\c -> c.id == cid) cs)

reqStatusClass :: Text -> Text
reqStatusClass "active"     = "bg-green-100 text-green-800"
reqStatusClass "superseded" = "bg-yellow-100 text-yellow-800"
reqStatusClass "withdrawn"  = "bg-gray-100 text-gray-500"
reqStatusClass _            = "bg-gray-100 text-gray-600"