/**
 * useSasquatchActions — publish the actions Sasquatch drafts (Pro).
 * ─────────────────────────────────────────────────────────────────────────────
 * Sasquatch never publishes on its own. The AI proposes a structured DRAFT; the
 * user reviews it in a confirmation card; only on confirm do we sign & publish
 * here. All actions reuse the app's existing event schemas.
 *
 * Supported drafts:
 *   • post_status  — NIP-38 skating status (kind 30315), optional expiry
 *   • list_gear    — NIP-99 marketplace listing (kind 30402), skateboarding-tagged
 */

import { useCallback } from 'react';
import { useCurrentUser } from '@/hooks/useCurrentUser';
import { useNostrPublish } from '@/hooks/useNostrPublish';
import { MARKETPLACE_ITEM_KIND } from '@/lib/types';
import { USER_STATUS_KIND } from '@/hooks/useUserStatus';

// ─── Draft shapes ─────────────────────────────────────────────────────────────

export interface PostStatusDraft {
  type: 'post_status';
  /** Freeform status text, e.g. "🛹 Skating Southbank". */
  text: string;
  /** Minutes until it auto-expires (default 120). */
  expiresInMinutes?: number;
}

export interface ListGearDraft {
  type: 'list_gear';
  title: string;
  description?: string;
  /** Price in the given currency (default sats). Omit for "make offer". */
  price?: number;
  currency?: string;
  /** deck | trucks | wheels | bearings | shoes | clothing | other */
  category?: string;
  condition?: string;
  size?: string;
}

export type SasquatchDraft = PostStatusDraft | ListGearDraft;

// ─── Human-readable summary for the confirmation card ────────────────────────

export function summarizeDraft(d: SasquatchDraft): { title: string; lines: string[]; cta: string } {
  if (d.type === 'post_status') {
    const mins = d.expiresInMinutes ?? 120;
    return {
      title: 'Post a skating status',
      lines: [`"${d.text}"`, `Auto-expires in ${mins} min`],
      cta: 'Post status',
    };
  }
  const lines: string[] = [];
  if (d.category) lines.push(`Category: ${d.category}`);
  if (d.condition) lines.push(`Condition: ${d.condition}`);
  if (d.size) lines.push(`Size: ${d.size}`);
  lines.push(d.price ? `Price: ${d.price.toLocaleString()} ${d.currency ?? 'sats'}` : 'Price: make offer');
  if (d.description) lines.push(d.description);
  return { title: `List "${d.title}" for sale`, lines, cta: 'Publish listing' };
}

// ─── The hook ─────────────────────────────────────────────────────────────────

export function useSasquatchActions() {
  const { user } = useCurrentUser();
  const { mutateAsync: publishEvent } = useNostrPublish();

  const publishDraft = useCallback(
    async (draft: SasquatchDraft): Promise<{ ok: true; label: string }> => {
      if (!user) throw new Error('You must be logged in.');

      if (draft.type === 'post_status') {
        const tags: string[][] = [['d', 'general']];
        const mins = draft.expiresInMinutes ?? 120;
        tags.push(['expiration', String(Math.floor(Date.now() / 1000) + mins * 60)]);
        await publishEvent({ kind: USER_STATUS_KIND, content: draft.text.slice(0, 140), tags });
        return { ok: true, label: 'Status posted 🛹' };
      }

      // list_gear
      const now = Math.floor(Date.now() / 1000);
      const identifier = `gear-${now}-${Math.random().toString(36).slice(2, 8)}`;
      const currency = draft.currency ?? 'sats';
      const tags: string[][] = [
        ['d', identifier],
        ['title', draft.title.slice(0, 120)],
        ['t', 'skateboarding'],
        ['listing_type', 'sell'],
        ['status', 'active'],
        ['published_at', String(now)],
        ['alt', `Gear listing: ${draft.title}`],
      ];
      if (draft.category) tags.push(['t', draft.category]);
      if (typeof draft.price === 'number' && draft.price > 0) {
        tags.push(['price_type', 'fixed']);
        tags.push(['price', String(draft.price), currency]);
      } else {
        tags.push(['price_type', 'offer']);
      }
      if (draft.condition) tags.push(['condition', draft.condition]);
      if (draft.size) tags.push(['size', draft.size]);

      await publishEvent({
        kind: MARKETPLACE_ITEM_KIND,
        content: (draft.description ?? '').slice(0, 2000),
        tags,
      });
      return { ok: true, label: 'Listing published 💸' };
    },
    [user, publishEvent],
  );

  return { publishDraft };
}