<?php declare(strict_types=1);

namespace Phan\PluginV2;

use Phan\CodeBase;
use Phan\Issue;
use Phan\IssueInstance;
use Phan\Language\Context;
use Phan\Language\Element\TypedElement;
use Phan\Language\Element\UnaddressableTypedElement;
use Phan\Language\FQSEN;
use Phan\Language\Type;
use Phan\Language\UnionType;
use Phan\Suggestion;

/**
 * A trait which allows plugins to emit issues with custom error messages
 */
trait IssueEmitter
{
    /**
     * Emit an issue if it is not suppressed
     *
     * @param CodeBase $code_base
     * The code base in which the issue was found
     *
     * @param Context $context
     * The context in which the issue was found
     *
     * @param string $issue_type
     * A name for the type of issue such as 'PhanPluginMyIssue'
     *
     * @param string $issue_message_fmt
     * The complete issue message format string to emit such as
     * 'class with fqsen {CLASS} is broken in some fashion' (preferred)
     * or 'class with fqsen %s is broken in some fashion'
     * The list of placeholders for between braces can be found
     * in \Phan\Issue::UNCOLORED_FORMAT_STRING_FOR_TEMPLATE.
     *
     * @param array<int,string|int|float|Type|UnionType|FQSEN|TypedElement|UnaddressableTypedElement> $issue_message_args
     * The arguments for this issue format.
     * If this array is empty, $issue_message_args is kept in place
     *
     * @param int $severity
     * A value from the set {Issue::SEVERITY_LOW,
     * Issue::SEVERITY_NORMAL, Issue::SEVERITY_HIGH}.
     *
     * @param int $remediation_difficulty
     * A guess at how hard the issue will be to fix from the
     * set {Issue:REMEDIATION_A, Issue:REMEDIATION_B, ...
     * Issue::REMEDIATION_F} with F being the hardest.
     *
     * @param int $issue_type_id An issue id for pylint
     *
     * @param ?Suggestion $suggestion
     * If this plugin has suggestions on how to fix the issue,
     * this can be added separately from the issue text.
     *
     * @return void
     */
    public static function emitPluginIssue(
        CodeBase $code_base,
        Context $context,
        string $issue_type,
        string $issue_message_fmt,
        array $issue_message_args = [],
        int $severity = Issue::SEVERITY_NORMAL,
        int $remediation_difficulty = Issue::REMEDIATION_B,
        int $issue_type_id = Issue::TYPE_ID_UNKNOWN,
        Suggestion $suggestion = null
    ) {
        $issue = new Issue(
            $issue_type,
            Issue::CATEGORY_PLUGIN,
            $severity,
            $issue_message_fmt,
            $remediation_difficulty,
            $issue_type_id
        );

        $issue_instance = new IssueInstance(
            $issue,
            $context->getFile(),
            $context->getLineNumberStart(),
            $issue_message_args,
            $suggestion
        );

        Issue::maybeEmitInstance(
            $code_base,
            $context,
            $issue_instance
        );
    }
}
