import { relations, sql } from 'drizzle-orm';
import { index, pgTable, text, timestamp, uuid } from 'drizzle-orm/pg-core';
import { users } from './auth';
import { matches } from './matching';

export const messages = pgTable(
  'messages',
  {
    id: uuid('id').primaryKey().defaultRandom(),
    matchId: uuid('match_id')
      .notNull()
      .references(() => matches.id, { onDelete: 'cascade' }),
    senderId: uuid('sender_id')
      .notNull()
      .references(() => users.id, { onDelete: 'cascade' }),
    body: text('body').notNull(),
    attachments: text('attachments').array().notNull().default(sql`'{}'::text[]`),
    readAt: timestamp('read_at', { withTimezone: true }),
    createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
  },
  (t) => [
    // Chat history is always "this match, newest last".
    index('messages_match_idx').on(t.matchId, t.createdAt),
    // Unread badge count.
    index('messages_unread_idx').on(t.matchId, t.senderId).where(sql`${t.readAt} IS NULL`),
  ],
);

export const messagesRelations = relations(messages, ({ one }) => ({
  match: one(matches, { fields: [messages.matchId], references: [matches.id] }),
  sender: one(users, { fields: [messages.senderId], references: [users.id] }),
}));