import { sql } from 'drizzle-orm'
import { index, integer, sqliteTable, text } from 'drizzle-orm/sqlite-core'

export const pots = sqliteTable('pots', {
  slug: text('slug').primaryKey(),
  name: text('name').notNull(),
  currency: text('currency').notNull(),
  createdAt: integer('created_at').notNull().default(sql`(unixepoch())`),
})

export const participants = sqliteTable('participants', {
  id: integer('id').primaryKey({ autoIncrement: true }),
  potSlug: text('pot_slug').notNull().references(() => pots.slug),
  name: text('name').notNull(),
  paymentLink: text('payment_link'),
  createdAt: integer('created_at').notNull().default(sql`(unixepoch())`),
}, table => [
  index('participants_pot_slug_idx').on(table.potSlug),
])

export const expenses = sqliteTable('expenses', {
  id: integer('id').primaryKey({ autoIncrement: true }),
  potSlug: text('pot_slug').notNull().references(() => pots.slug),
  // 'payment' rows are settlements: payerId is who paid, and the single row
  // in expenseParticipants is who received it — same shape as a one-person
  // split expense, which is mathematically what a settlement is.
  type: text('type').notNull().default('expense'),
  description: text('description').notNull(),
  amountCents: integer('amount_cents').notNull(),
  payerId: integer('payer_id').notNull().references(() => participants.id),
  createdAt: integer('created_at').notNull().default(sql`(unixepoch())`),
}, table => [
  index('expenses_pot_slug_idx').on(table.potSlug),
])

export const expenseParticipants = sqliteTable('expense_participants', {
  expenseId: integer('expense_id').notNull().references(() => expenses.id),
  participantId: integer('participant_id').notNull().references(() => participants.id),
}, table => [
  index('expense_participants_expense_id_idx').on(table.expenseId),
])