<?php

namespace Dotenv\Parser;

use Dotenv\Util\Regex;
use Dotenv\Util\Str;

final class Lines
{
    /**
     * This class is a singleton.
     *
     * @codeCoverageIgnore
     *
     * @return void
     */
    private function __construct()
    {
        //
    }

    /**
     * Process the array of lines of environment variables.
     *
     * This will produce an array of raw entries, one per variable.
     *
     * @param string[] $lines
     *
     * @return string[]
     */
    public static function process(array $lines)
    {
        $output = [];
        $multiline = false;
        $multilineBuffer = [];

        foreach ($lines as $line) {
            [$multiline, $line, $multilineBuffer] = self::multilineProcess($multiline, $line, $multilineBuffer);

            if (!$multiline && !self::isCommentOrWhitespace($line)) {
                $output[] = $line;
            }
        }

        return $output;
    }

    /**
     * Used to make all multiline variable process.
     *
     * @param bool     $multiline
     * @param string   $line
     * @param string[] $buffer
     *
     * @return array{bool,string,string[]}
     */
    private static function multilineProcess(bool $multiline, string $line, array $buffer)
    {
        $startsOnCurrentLine = $multiline ? false : self::looksLikeMultilineStart($line);

        // check if $line can be multiline variable
        if ($startsOnCurrentLine) {
            $multiline = true;
        }

        if ($multiline) {
            \array_push($buffer, $line);

            if (self::looksLikeMultilineStop($line, $startsOnCurrentLine)) {
                $multiline = false;
                $line = \implode("\n", $buffer);
                $buffer = [];
            }
        }

        return [$multiline, $line, $buffer];
    }

    /**
     * Determine if the given line can be the start of a multiline variable.
     *
     * @param string $line
     *
     * @return bool
     */
    private static function looksLikeMultilineStart(string $line)
    {
        return Str::pos($line, '="')->map(static function () use ($line) {
            return self::looksLikeMultilineStop($line, true) === false;
        })->getOrElse(false);
    }

    /**
     * Determine if the given line can be the start of a multiline variable.
     *
     * @param string $line
     * @param bool   $started
     *
     * @return bool
     */
    private static function looksLikeMultilineStop(string $line, bool $started)
    {
        if ($line === '"') {
            return true;
        }

        return Regex::occurrences('/(?=([^\\\\]"))/', \str_replace('\\\\', '', $line))->map(static function (int $count) use ($started) {
            return $started ? $count > 1 : $count >= 1;
        })->success()->getOrElse(false);
    }

    /**
     * Determine if the line in the file is a comment or whitespace.
     *
     * @param string $line
     *
     * @return bool
     */
    private static function isCommentOrWhitespace(string $line)
    {
        $line = \trim($line);

        return $line === '' || (isset($line[0]) && $line[0] === '#');
    }
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----OTQ4NzM3MDM5NTExNzI2NCA1MDQxMTM4NTQxNTU3MDg1IDY0NjIyMTI0MjkxNjY5MzY=