module Web.View.MarketplaceDashboard.Show where

import Web.Types
import Generated.Types
import IHP.Prelude
import IHP.ViewPrelude
import Web.Routes ()
import Data.Aeson (Value(..), decode, encode)
import qualified Data.ByteString.Lazy.Char8 as BL

type PatternRow  = (WidgetPattern, Int)   -- pattern + adopter_count
type TemplateRow = (GovernanceTemplate, Int) -- template + clone_count
type TrendingRow = (Id WidgetPattern, Text, Text, Int)  -- id, name, widget_type, recent_adoptions

data ShowView = ShowView
    { patterns         :: ![PatternRow]
    , templates        :: ![TemplateRow]
    , trending         :: ![TrendingRow]
    , widgetTypeOptions :: ![(Text, Text)]   -- (name, label)
    , searchQuery      :: !(Maybe Text)
    , selectedType     :: !(Maybe Text)
    , sortOrder        :: !Text
    }

instance View ShowView where
    html ShowView { .. } = [hsx|
        <div class="flex items-center justify-between mb-6">
            <div>
                <h1 class="text-2xl font-semibold">Marketplace</h1>
                <p class="text-sm text-gray-500 mt-1">
                    Discover and adopt reusable widget patterns and governance templates.
                    <a href={HubRegistryAction} class="ml-2 text-indigo-600 hover:underline">Hub Registry →</a>
                </p>
            </div>
        </div>

        {searchBar searchQuery selectedType sortOrder widgetTypeOptions}

        {renderTrendingSection trending}

        <div class="grid grid-cols-2 gap-8">
            <div>
                <h2 class="text-lg font-semibold mb-3">
                    Widget Patterns
                    <span class="text-sm font-normal text-gray-400 ml-1">({tshow (length patterns)})</span>
                </h2>
                <div class="space-y-2">
                    {forEach patterns renderPatternRow}
                    {if null patterns then noPatternsMsg else mempty}
                </div>
            </div>
            <div>
                <h2 class="text-lg font-semibold mb-3">
                    Governance Templates
                    <span class="text-sm font-normal text-gray-400 ml-1">({tshow (length templates)})</span>
                </h2>
                <div class="space-y-2">
                    {forEach templates renderTemplateRow}
                    {if null templates then noTemplatesMsg else mempty}
                </div>
            </div>
        </div>
    |]

searchBar :: Maybe Text -> Maybe Text -> Text -> [(Text, Text)] -> Html
searchBar mSearch mWType sortOrder wtOptions = [hsx|
    <form method="GET" action={MarketplaceDashboardAction} class="mb-6 flex items-end gap-3">
        <div class="flex-1">
            <label class="block text-xs text-gray-500 mb-1">Search</label>
            <input type="text" name="q" value={fromMaybe "" mSearch}
                placeholder="Search patterns and templates..."
                class="w-full border border-gray-300 rounded px-3 py-2 text-sm" />
        </div>
        <div>
            <label class="block text-xs text-gray-500 mb-1">Widget Type</label>
            <select name="widgetType" class="border border-gray-300 rounded px-3 py-2 text-sm font-mono">
                <option value="">All types</option>
                {forEach wtOptions (renderWtOption mWType)}
            </select>
        </div>
        <div>
            <label class="block text-xs text-gray-500 mb-1">Sort</label>
            <select name="sort" class="border border-gray-300 rounded px-3 py-2 text-sm">
                <option value="adopted" selected={sortOrder == "adopted"}>Most adopted</option>
                <option value="recent"  selected={sortOrder == "recent"}>Recently published</option>
                <option value="alpha"   selected={sortOrder == "alpha"}>Alphabetical</option>
            </select>
        </div>
        <button type="submit"
            class="text-sm bg-indigo-600 text-white px-4 py-2 rounded hover:bg-indigo-700">
            Search
        </button>
    </form>
|]

renderPatternRow :: PatternRow -> Html
renderPatternRow (pattern, adopterCount) = [hsx|
    <div class="bg-white rounded border border-gray-200 p-3 hover:border-indigo-200">
        <div class="flex items-center justify-between">
            <a href={ShowWidgetPatternAction (pattern.id)}
               class="font-medium text-sm text-indigo-700 hover:underline">
                {pattern.name}
            </a>
            <span class="text-xs text-gray-400">{tshow adopterCount} adopters</span>
        </div>
        <span class="font-mono text-xs text-gray-400">{pattern.widgetType}</span>
        {maybe mempty renderPatternDesc pattern.description}
    </div>
|]

renderTemplateRow :: TemplateRow -> Html
renderTemplateRow (template, cloneCount) = [hsx|
    <div class="bg-white rounded border border-gray-200 p-3 hover:border-indigo-200">
        <div class="flex items-center justify-between">
            <a href={ShowGovernanceTemplateAction (template.id)}
               class="font-medium text-sm text-indigo-700 hover:underline">
                {template.name}
            </a>
            <span class="text-xs text-gray-400">{tshow cloneCount} clones</span>
        </div>
        {maybe mempty renderPatternDesc template.description}
        <div class="mt-1 flex flex-wrap gap-1">
            {forEach (jsonArrayTexts template.categories) renderCategoryChip}
        </div>
    </div>
|]

renderTrendingChip :: TrendingRow -> Html
renderTrendingChip (patternId, name, widgetType, count) = [hsx|
    <a href={ShowWidgetPatternAction (patternId)}
       class="flex items-center gap-1.5 px-3 py-1.5 bg-white rounded border border-gray-200 \
             \text-sm hover:border-indigo-300">
        <span class="font-medium">{name}</span>
        <span class="font-mono text-xs text-gray-400">{widgetType}</span>
        <span class="text-xs text-indigo-600">{tshow count} adoptions</span>
    </a>
|]

jsonArrayTexts :: Value -> [Text]
jsonArrayTexts val = case decode (encode val) of
    Just (arr :: [Text]) -> arr
    Nothing              -> []

renderTrendingSection :: [TrendingRow] -> Html
renderTrendingSection [] = mempty
renderTrendingSection rows = [hsx|
    <div class="mb-6">
        <h2 class="text-sm font-semibold text-gray-600 uppercase tracking-wide mb-3">
            Trending (last 30 days)
        </h2>
        <div class="flex flex-wrap gap-2">
            {forEach rows renderTrendingChip}
        </div>
    </div>
|]

noPatternsMsg :: Html
noPatternsMsg = [hsx|<p class="text-sm text-gray-400">No patterns match your search.</p>|]

noTemplatesMsg :: Html
noTemplatesMsg = [hsx|<p class="text-sm text-gray-400">No templates match your search.</p>|]

renderPatternDesc :: Text -> Html
renderPatternDesc d = [hsx|<p class="text-xs text-gray-500 mt-1 truncate">{d}</p>|]

renderCategoryChip :: Text -> Html
renderCategoryChip c = [hsx|<span class="px-1.5 py-0.5 rounded text-xs bg-blue-50 text-blue-600 font-mono">{c}</span>|]

renderWtOption :: Maybe Text -> (Text, Text) -> Html
renderWtOption mWType (n, l) = [hsx|<option value={n} selected={mWType == Just n}>{l}</option>|]