'use server';

import { revalidatePath } from 'next/cache';
import { requireStaff } from '@/lib/admin/guard';
import { prisma } from '@/lib/prisma';
import { logStaffActivity } from '@/lib/services/staff-activity';

// AutoDJ playlist CRUD (radio_auto_dj_playlist). CMS-owned table backing the
// fallback playlist the radio rotates through when no live DJ is streaming.
// Faithful to AtomCMS: a flat list of tracks ordered by sort_order then title.

// ── Helpers ──────────────────────────────────────────────────────────────

/** Parse a FormData field into a positive BigInt id, or null when invalid. */
function parseId(raw: FormDataEntryValue | null): bigint | null {
  if (typeof raw !== 'string' || raw.trim() === '') return null;
  try {
    const id = BigInt(raw.trim());
    return id > 0n ? id : null;
  } catch {
    return null;
  }
}

function str(raw: FormDataEntryValue | null): string {
  return typeof raw === 'string' ? raw : '';
}

/** Checkbox/select truthiness: '1', 'true', 'on' → true. */
function bool(raw: FormDataEntryValue | null): boolean {
  const v = str(raw).trim().toLowerCase();
  return v === '1' || v === 'true' || v === 'on';
}

/** Parse a non-negative UnsignedInt, falling back to 0. */
function reqUInt(raw: FormDataEntryValue | null): number {
  const n = Number(str(raw).trim());
  if (!Number.isFinite(n) || n < 0) return 0;
  return Math.trunc(n);
}

/** Parse an optional non-negative UnsignedInt; blank/invalid/negative → null. */
function optUInt(raw: FormDataEntryValue | null): number | null {
  const s = str(raw).trim();
  if (s === '') return null;
  const n = Number(s);
  if (!Number.isFinite(n) || n < 0) return null;
  return Math.trunc(n);
}

// ── AutoDJ playlist CRUD (radio_auto_dj_playlist) ────────────────────────

export async function createTrack(formData: FormData): Promise<void> {
  const staff = await requireStaff();
  const title = str(formData.get('title')).trim().slice(0, 255);
  if (!title) return;

  const artist = str(formData.get('artist')).trim().slice(0, 255);
  const album = str(formData.get('album')).trim().slice(0, 255);
  const artworkUrl = str(formData.get('artworkUrl')).trim().slice(0, 255);
  const duration = optUInt(formData.get('duration'));
  const sortOrder = reqUInt(formData.get('sortOrder'));
  const isActive = bool(formData.get('isActive'));
  const now = new Date();

  try {
    const created = await prisma.radioAutoDjPlaylist.create({
      data: {
        title,
        artist: artist || null,
        album: album || null,
        artworkUrl: artworkUrl || null,
        duration,
        sortOrder,
        isActive,
        createdAt: now,
        updatedAt: now,
      },
    });
    await logStaffActivity({
      staffId: staff.id,
      action: 'radio_autodj_create',
      description: `Created AutoDJ track "${title}"${artist ? ` by ${artist}` : ''}`,
      targetType: 'radio_auto_dj_track',
      targetId: Number(created.id),
    });
  } catch {
    // Fail soft — DB unavailable; re-render without throwing.
  }
  revalidatePath('/admin/radio/autodj');
}

export async function toggleTrack(formData: FormData): Promise<void> {
  const staff = await requireStaff();
  const id = parseId(formData.get('id'));
  if (id === null) return;

  // The form posts the desired next state so the toggle is idempotent.
  const isActive = bool(formData.get('isActive'));

  try {
    await prisma.radioAutoDjPlaylist.update({
      where: { id },
      data: { isActive, updatedAt: new Date() },
    });
    await logStaffActivity({
      staffId: staff.id,
      action: 'radio_autodj_toggle',
      description: `${isActive ? 'Activated' : 'Deactivated'} AutoDJ track #${id}`,
      targetType: 'radio_auto_dj_track',
      targetId: Number(id),
    });
  } catch {
    // Row may be gone; ignore.
  }
  revalidatePath('/admin/radio/autodj');
}

export async function deleteTrack(formData: FormData): Promise<void> {
  const staff = await requireStaff();
  const id = parseId(formData.get('id'));
  if (id === null) return;

  try {
    await prisma.radioAutoDjPlaylist.delete({ where: { id } });
    await logStaffActivity({
      staffId: staff.id,
      action: 'radio_autodj_delete',
      description: `Deleted AutoDJ track #${id}`,
      targetType: 'radio_auto_dj_track',
      targetId: Number(id),
    });
  } catch {
    // Already deleted; ignore.
  }
  revalidatePath('/admin/radio/autodj');
}