// Baut aus einem Gitea-Push ein hübsches Embed und postet es in den Commit-Kanal
import { EmbedBuilder } from 'discord.js';
import { config } from '../config.js';

const GITEA_GREEN = 0x609926;
const MAX_COMMITS_SHOWN = 10;

/** Erste Zeile der Commit-Message, auf maxLen gekürzt */
function firstLine(message, maxLen = 72) {
    const line = message.split('\n')[0].trim();
    return line.length > maxLen ? `${line.slice(0, maxLen - 1)}…` : line;
}

/**
 * Push-Embed in den Commit-Kanal posten.
 * @param {import('discord.js').Client} client
 * @param {{ repo: string, repoUrl: string, branch: string, compareUrl: string|null,
 *           pusherName: string, pusherAvatar: string|null,
 *           commits: Array<{sha: string, message: string, url: string, author_name: string}> }} push
 */
export async function postPushEmbed(client, push) {
    const channel = await client.channels.fetch(config.commitChannelId);
    if (!channel?.isTextBased()) {
        throw new Error(`Commit-Kanal ${config.commitChannelId} nicht gefunden oder kein Textkanal`);
    }

    const count = push.commits.length;
    const lines = push.commits.slice(0, MAX_COMMITS_SHOWN).map(
        (c) => `[\`${c.sha.slice(0, 7)}\`](${c.url}) ${firstLine(c.message)} — ${c.author_name}`
    );
    if (count > MAX_COMMITS_SHOWN) {
        lines.push(`… und ${count - MAX_COMMITS_SHOWN} weitere`);
    }

    const embed = new EmbedBuilder()
        .setColor(GITEA_GREEN)
        .setAuthor({ name: push.pusherName, iconURL: push.pusherAvatar ?? undefined })
        .setTitle(`📦 ${count} ${count === 1 ? 'neuer Commit' : 'neue Commits'} in ${push.repo}`)
        .setURL(push.compareUrl || push.repoUrl)
        .setDescription(lines.join('\n'))
        .setFooter({ text: `Branch: ${push.branch}` })
        .setTimestamp();

    await channel.send({ embeds: [embed] });
}