<?php

declare(strict_types=1);

namespace Core\Plug\Web3\Farcaster;

use Core\Plug\Concern\BuildsResponse;
use Core\Plug\Concern\ManagesTokens;
use Core\Plug\Concern\UsesHttp;
use Core\Plug\Contract\Readable;
use Core\Plug\Response;

/**
 * Farcaster profile and cast reading.
 */
class Read implements Readable
{
    use BuildsResponse;
    use ManagesTokens;
    use UsesHttp;

    private const NEYNAR_API = 'https://api.neynar.com/v2/farcaster';

    private string $apiKey = '';

    private ?int $fid = null;

    /**
     * Set the Neynar API key.
     */
    public function withApiKey(string $apiKey): self
    {
        $this->apiKey = $apiKey;

        return $this;
    }

    /**
     * Set the FID for user operations.
     */
    public function forFid(int $fid): self
    {
        $this->fid = $fid;

        return $this;
    }

    /**
     * Get a specific cast by hash.
     */
    public function get(string $id): Response
    {
        $response = $this->http()
            ->withHeaders(['api_key' => $this->apiKey])
            ->get(self::NEYNAR_API.'/cast', [
                'identifier' => $id,
                'type' => 'hash',
            ]);

        return $this->fromHttp($response, fn ($data) => [
            'hash' => $data['cast']['hash'],
            'text' => $data['cast']['text'],
            'author' => [
                'fid' => $data['cast']['author']['fid'],
                'username' => $data['cast']['author']['username'],
                'display_name' => $data['cast']['author']['display_name'],
                'pfp_url' => $data['cast']['author']['pfp_url'],
            ],
            'timestamp' => $data['cast']['timestamp'],
            'reactions' => [
                'likes_count' => $data['cast']['reactions']['likes_count'] ?? 0,
                'recasts_count' => $data['cast']['reactions']['recasts_count'] ?? 0,
            ],
            'replies' => [
                'count' => $data['cast']['replies']['count'] ?? 0,
            ],
        ]);
    }

    /**
     * Get the authenticated user's profile by FID.
     */
    public function me(): Response
    {
        if (! $this->fid) {
            return $this->error('FID is required');
        }

        return $this->user($this->fid);
    }

    /**
     * Get user by FID.
     */
    public function user(int $fid): Response
    {
        $response = $this->http()
            ->withHeaders(['api_key' => $this->apiKey])
            ->get(self::NEYNAR_API.'/user/bulk', [
                'fids' => $fid,
            ]);

        return $this->fromHttp($response, function ($data) {
            $user = $data['users'][0] ?? null;

            if (! $user) {
                return ['error' => 'User not found'];
            }

            return [
                'fid' => $user['fid'],
                'username' => $user['username'],
                'name' => $user['display_name'],
                'image' => $user['pfp_url'],
                'bio' => $user['profile']['bio']['text'] ?? null,
                'followers_count' => $user['follower_count'] ?? 0,
                'following_count' => $user['following_count'] ?? 0,
                'verified_addresses' => $user['verified_addresses'] ?? [],
                'power_badge' => $user['power_badge'] ?? false,
            ];
        });
    }

    /**
     * Get user by username.
     */
    public function userByUsername(string $username): Response
    {
        $response = $this->http()
            ->withHeaders(['api_key' => $this->apiKey])
            ->get(self::NEYNAR_API.'/user/by_username', [
                'username' => $username,
            ]);

        return $this->fromHttp($response, fn ($data) => [
            'fid' => $data['user']['fid'],
            'username' => $data['user']['username'],
            'name' => $data['user']['display_name'],
            'image' => $data['user']['pfp_url'],
            'bio' => $data['user']['profile']['bio']['text'] ?? null,
            'followers_count' => $data['user']['follower_count'] ?? 0,
            'following_count' => $data['user']['following_count'] ?? 0,
        ]);
    }

    /**
     * Get user's casts.
     */
    public function list(array $params = []): Response
    {
        $fid = $params['fid'] ?? $this->fid;

        if (! $fid) {
            return $this->error('FID is required');
        }

        $response = $this->http()
            ->withHeaders(['api_key' => $this->apiKey])
            ->get(self::NEYNAR_API.'/feed/user/casts', [
                'fid' => $fid,
                'limit' => $params['limit'] ?? 25,
                'cursor' => $params['cursor'] ?? null,
                'include_replies' => $params['include_replies'] ?? false,
            ]);

        return $this->fromHttp($response, fn ($data) => [
            'casts' => array_map(fn ($cast) => [
                'hash' => $cast['hash'],
                'text' => $cast['text'],
                'timestamp' => $cast['timestamp'],
                'likes_count' => $cast['reactions']['likes_count'] ?? 0,
                'recasts_count' => $cast['reactions']['recasts_count'] ?? 0,
                'replies_count' => $cast['replies']['count'] ?? 0,
            ], $data['casts'] ?? []),
            'cursor' => $data['next']['cursor'] ?? null,
        ]);
    }

    /**
     * Get channel feed.
     */
    public function channel(string $channelId, array $params = []): Response
    {
        $response = $this->http()
            ->withHeaders(['api_key' => $this->apiKey])
            ->get(self::NEYNAR_API.'/feed/channel', [
                'channel_ids' => $channelId,
                'limit' => $params['limit'] ?? 25,
                'cursor' => $params['cursor'] ?? null,
            ]);

        return $this->fromHttp($response, fn ($data) => [
            'casts' => array_map(fn ($cast) => [
                'hash' => $cast['hash'],
                'text' => $cast['text'],
                'author' => [
                    'fid' => $cast['author']['fid'],
                    'username' => $cast['author']['username'],
                ],
                'timestamp' => $cast['timestamp'],
            ], $data['casts'] ?? []),
            'cursor' => $data['next']['cursor'] ?? null,
        ]);
    }
}