<?php

declare(strict_types=1);

namespace Mod\Explorer\Controllers;

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

/**
 * Block explorer API — JSON responses for chain data.
 *
 *   GET /v1/explorer/info         — chain info
 *   GET /v1/explorer/block/{id}   — block by height or hash
 *   GET /v1/explorer/tx/{hash}    — transaction details
 *   GET /v1/explorer/aliases      — all aliases
 *   GET /v1/explorer/alias/{name} — single alias
 *   GET /v1/explorer/search/{q}   — search
 *   GET /v1/explorer/stats        — chain statistics
 */
class ExplorerApiController extends Controller
{
    public function __construct(
        private readonly DaemonRpc $rpc,
    ) {}

    public function info(): JsonResponse
    {
        return response()->json($this->rpc->getInfo());
    }

    public function block(string $id): JsonResponse
    {
        $block = is_numeric($id)
            ? $this->rpc->getBlockByHeight((int) $id)
            : $this->rpc->getBlockByHash($id);

        return response()->json($block);
    }

    public function transaction(string $hash): JsonResponse
    {
        return response()->json($this->rpc->getTransaction($hash));
    }

    public function aliases(): JsonResponse
    {
        $result = $this->rpc->getAllAliases();

        return response()->json([
            'aliases' => $result['aliases'] ?? [],
            'count' => count($result['aliases'] ?? []),
        ]);
    }

    public function alias(string $name): JsonResponse
    {
        $alias = $this->rpc->getAliasByName($name);

        if (! $alias) {
            return response()->json(['error' => 'Alias not found'], 404);
        }

        return response()->json($alias);
    }

    public function search(string $query): JsonResponse
    {
        if (is_numeric($query)) {
            return response()->json([
                'type' => 'block',
                'data' => $this->rpc->getBlockByHeight((int) $query),
            ]);
        }

        if (strlen($query) === 64 && ctype_xdigit($query)) {
            $block = $this->rpc->getBlockByHash($query);
            if (! empty($block['block_header'])) {
                return response()->json(['type' => 'block', 'data' => $block]);
            }

            return response()->json([
                'type' => 'transaction',
                'data' => $this->rpc->getTransaction($query),
            ]);
        }

        $alias = $this->rpc->getAliasByName($query);
        if ($alias) {
            return response()->json(['type' => 'alias', 'data' => $alias]);
        }

        return response()->json(['error' => 'Not found'], 404);
    }

    public function stats(): JsonResponse
    {
        $info = $this->rpc->getInfo();

        return response()->json([
            'height' => $info['height'] ?? 0,
            'difficulty' => [
                'pow' => $info['pow_difficulty'] ?? 0,
                'pos' => $info['pos_difficulty'] ?? '0',
            ],
            'hashrate' => $info['current_network_hashrate_350'] ?? 0,
            'aliases' => $info['alias_count'] ?? 0,
            'transactions' => $info['tx_count'] ?? 0,
            'supply' => ($info['height'] ?? 0) + 10000000, // premine + block rewards
            'network' => config('chain.network'),
        ]);
    }
}