<?php

namespace NoccyLabs\Mercureact;

use Symfony\Component\Yaml\Yaml;

class Configuration
{
    private array $config = [];

    public function __construct(array $config=[])
    {
        $this->config = $config;
    }

    public static function createDefault(): Configuration
    {
        return new Configuration([
            "publish.overwrite_ids" => false,
            "publish.reject_duplicates" => false,
            "server.address" => "127.0.0.1:9000",
            "server.websockets" => false,
            "server.enable_api" => true,
            "server.limits.max_concurrent" => 100,
            "server.limits.max_request_body" => 102400,
            "server.cors.allow_origin" => "*",
            "server.cors.csp" => "default-src * 'self' http: 'unsafe-eval' 'unsafe-inline'; connect-src * 'self'",
            "subscribe.allow_anonymous" => true,
            "security.jwt_secret" => "!ChangeThisMercureHubJWTSecretKey!",
        ]);
    }

    public static function fromFile(string $file): Configuration
    {
        $config = new Configuration();

        $file = realpath($file);
        if (!file_exists($file)) {
            throw new \Exception("Configuration file not found");
        }
        $data = file_get_contents($file);
        $yaml = Yaml::parse($data);

        $unwrap = null; // mute IDE complains about $unwrap not defined
        $unwrap = function (array $array, Configuration $target, array $path=[]) use (&$unwrap) {
            foreach ($array as $key=>$value) {
                if (is_array($value)) {
                    $unwrap($value, $target, [ ...$path, $key ]);
                } else {
                    $key = join(".", [ ...$path, $key ]);
                    $target->config[$key] = $value;
                }
            }
        };
        $unwrap($yaml, $config);

        return $config;
    }

    /**
     * Retrieve a key from the configuration. If the key ends with a dot, all values
     * with keys starting with the requested key are returned. If the key is a single 
     * dot, all keys are matched and all values returned.
     * 
     * @param string $key
     * @param mixed $default Default value
     * @return mixed
     */
    public function get(string $key, $default = null): mixed
    {
        if ($key === '.')
            return $this->config;
        if (str_ends_with($key, "."))
            return array_filter($this->config, fn($k)=>str_starts_with($k,$key), ARRAY_FILTER_USE_KEY);
        return $this->config[$key] ?? $default;
    }

    public function setPublicUrl(string $publicUrl): self
    {
        $this->config['server.public_url'] = $publicUrl;
        return $this;
    }

    public function getPublicUrl(): ?string
    {
        return $this->config['server.public_url']??null;
    }

    public function setJwtSecret(string $secret): self
    {
        $this->config['security.jwt_secret'] = $secret;
        return $this;
    }

    public function getJwtSecret(): ?string
    {
        return $this->config['security.jwt_secret']??null;
    }

	function getAllowAnonymousSubscribe():bool
    {
		return $this->config['subscribe.allow_anonymous']??false;
	}

	function setAllowAnonymousSubscribe(bool $allowAnonymousSubscribe): self
    {
		$this->config['subscribe.allow_anonymous'] = $allowAnonymousSubscribe;
		return $this;
    }

    public function setListenAddress(string $address): self
    {
        $this->config['server.address'] = $address;
        return $this;
    }

    public function getListenAddress(): ?string
    {
        return $this->config['server.address']??null;
    }

    public function setAllowOriginHeader(string $value): self
    {
        $this->config['headers.allow_origin'] = $value;
        return $this;
    }

    public function setContentSecurityPolicyHeader(string $value): self
    {
        $this->config['headers.csp'] = $value;
        return $this;
    }

    public function getEnableWebSockets(): bool
    {
        return (bool)($this->config['server.websockets']??false);
    }

    public function setEnableWebSockets(bool $enable): self
    {
        $this->config['server.websockets'] = $enable;
        return $this;
    }

    public function getOverwriteMessageIds(): bool
    {
        return $this->config['publish.overwrite_ids']??true;
    }

    public function getRejectDuplicateMessages(): bool
    {
        return $this->config['publish.reject_duplicates']??true;
    }

    public function getDuplicateIdHistorySize(): int
    {
        return 50;
    }
}