<?php

declare(strict_types=1);

namespace Mod\Explorer\Controllers;

use Illuminate\Http\Request;
use Illuminate\Routing\Controller;
use Mod\Chain\Services\DaemonRpc;

/**
 * Block explorer web controller.
 *
 *   GET /explorer            — blockchain overview + latest blocks
 *   GET /explorer/block/{id} — block details by height or hash
 *   GET /explorer/tx/{hash}  — transaction details
 *   GET /explorer/aliases    — alias directory
 *   GET /explorer/assets     — confidential assets browser
 *   GET /explorer/charts     — chain charts
 */
class ExplorerController extends Controller
{
    public function __construct(
        private readonly DaemonRpc $rpc,
    ) {}

    /**
     *   GET /explorer
     */
    public function index(): \Illuminate\View\View
    {
        $info = $this->rpc->getInfo();
        $height = ($info['height'] ?? 1) - 1;

        // Fetch last 15 blocks
        $blocks = [];
        for ($i = $height; $i >= max(0, $height - 14); $i--) {
            $block = $this->rpc->getBlockByHeight($i);
            if (! empty($block['block_header'])) {
                $blocks[] = $block['block_header'];
            }
        }

        return view('explorer::index', [
            'info' => $info,
            'lastBlock' => $blocks[0] ?? [],
            'blocks' => $blocks,
        ]);
    }

    /**
     *   GET /explorer/block/{id}
     */
    public function block(string $id): \Illuminate\View\View
    {
        $block = is_numeric($id)
            ? $this->rpc->getBlockByHeight((int) $id)
            : $this->rpc->getBlockByHash($id);

        return view('explorer::block', [
            'block' => $block['block_header'] ?? [],
        ]);
    }

    /**
     *   GET /explorer/tx/{hash}
     */
    public function transaction(string $hash): \Illuminate\View\View
    {
        $tx = $this->rpc->getTransaction($hash);

        return view('explorer::transaction', [
            'tx' => $tx,
        ]);
    }

    /**
     *   GET /explorer/aliases
     */
    public function aliases(Request $request): \Illuminate\View\View
    {
        $result = $this->rpc->getAllAliases();
        $aliases = $result['aliases'] ?? [];
        $filter = $request->get('filter', 'all');

        if ($filter === 'premium') {
            $aliases = array_filter($aliases, fn($a) => strlen($a['alias'] ?? '') < 6);
        }

        return view('explorer::aliases', [
            'aliases' => $aliases,
            'total' => count($result['aliases'] ?? []),
            'filter' => $filter,
        ]);
    }

    /**
     *   GET /explorer/charts
     */
    public function charts(): \Illuminate\View\View
    {
        return view('explorer::charts');
    }

    /**
     *   GET /explorer/search?q={query}
     */
    public function search(Request $request): \Illuminate\Http\RedirectResponse
    {
        $query = trim((string) $request->get('q'));

        if (is_numeric($query)) {
            return redirect("/explorer/block/{$query}");
        }

        if (strlen($query) === 64 && ctype_xdigit($query)) {
            // Could be block hash or tx hash — try block first
            $block = $this->rpc->getBlockByHash($query);
            if (! empty($block['block_header'])) {
                return redirect("/explorer/block/{$query}");
            }

            return redirect("/explorer/tx/{$query}");
        }

        // Might be an alias name
        $alias = $this->rpc->getAliasByName($query);
        if ($alias) {
            return redirect("/explorer/aliases?search={$query}");
        }

        return redirect('/explorer')->with('error', 'Nothing found for: ' . $query);
    }
}