import { json, error } from '@sveltejs/kit';
import { db } from '$lib/server/db/index.js';

export async function GET({ params }: { params: { id: string } }) {
    const dep = db()
        .prepare('SELECT * FROM deployments WHERE id = ?')
        .get(params.id) as Record<string, unknown> | undefined;
    if (!dep) throw error(404, 'deployment not found');

    const servers = db()
        .prepare('SELECT * FROM deployment_servers WHERE deployment_id = ? ORDER BY server')
        .all(params.id);

    // Don't ship blobs in the summary — the client asks for a single file when
    // it opens the diff viewer.
    const files = db()
        .prepare(
            `SELECT id, server, verb, rel_path, sha256_before, sha256_after, snapshot_pending,
                    LENGTH(content_before) AS size_before,
                    LENGTH(content_after)  AS size_after,
                    COALESCE((SELECT state FROM staged_file_changes WHERE deployment_file_id = deployment_files.id), 'applied') AS apply_state
             FROM deployment_files
             WHERE deployment_id = ?
             ORDER BY server, rel_path`
        )
        .all(params.id);

    const scripts = db()
        .prepare(
            `SELECT ds.script_id, s.name AS script_name, s.target_rel_path,
                    ds.script_version_id, sv.version AS script_version,
                    ds.prior_version_id, pv.version AS prior_version
             FROM deployment_scripts ds
             LEFT JOIN scripts s ON s.id = ds.script_id
             LEFT JOIN script_versions sv ON sv.id = ds.script_version_id
             LEFT JOIN script_versions pv ON pv.id = ds.prior_version_id
             WHERE ds.deployment_id = ?
             ORDER BY ds.script_id`
        )
        .all(params.id);

    const events = db().prepare('SELECT id, created_at, message FROM campaign_events WHERE deployment_id = ? ORDER BY id').all(params.id);
    const watchdog = db().prepare('SELECT incident_id FROM watchdog_actions WHERE campaign_id = ? LIMIT 1').get(params.id) as { incident_id: string } | undefined;
    const fileContentsExpired = !!db().prepare("SELECT 1 FROM retention_expirations WHERE category='file-content' AND record_id=?").get(params.id);
    return json({ fileContentsExpired, deployment: dep, servers, files, scripts, events, watchdogIncidentId: watchdog?.incident_id ?? null });
}