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

export const user = sqliteTable('user', {
	id: text('id').primaryKey(),
	firstName: text('first_name'),
	lastName: text('last_name'),
	email: text('email').unique(),
	passwordHash: text('password_hash'),
	appleId: text('apple_id').unique(),
	googleId: text('google_id').unique(),
	isPrivate: integer('is_private', { mode: 'boolean' }).default(false),
	// Additive: existing rows stay NULL ("unknown signup date"). New rows get a
	// timestamp automatically via the client-side default function.
	createdAt: integer('created_at', { mode: 'timestamp' }).$defaultFn(() => new Date())
});

export const session = sqliteTable('session', {
	id: text('id').primaryKey(),
	userId: text('user_id').notNull().references(() => user.id),
	expiresAt: integer('expires_at', { mode: 'timestamp' }).notNull()
});

export type Session = typeof session.$inferSelect;

export type User = typeof user.$inferSelect;

export const dailyVerses = sqliteTable('daily_verses', {
	id: text('id').primaryKey(),
	date: text('date').unique().notNull(),
	bookId: text('book_id').notNull(),
	verseText: text('verse_text').notNull(),
	reference: text('reference').notNull(),
	createdAt: integer('created_at', { mode: 'timestamp' }),
});

export type DailyVerse = typeof dailyVerses.$inferSelect;

export const dailyCompletions = sqliteTable('daily_completions', {
	id: text('id').primaryKey(),
	anonymousId: text('anonymous_id').notNull(),
	date: text('date').notNull(),
	guessCount: integer('guess_count').notNull(),
	guesses: text('guesses'), // nullable; only stored for logged-in users
	completedAt: integer('completed_at', { mode: 'timestamp' }).notNull(),
}, (table) => [
	index('anonymous_id_date_idx').on(table.anonymousId, table.date),
	index('date_idx').on(table.date),
	index('date_guess_idx').on(table.date, table.guessCount),
	// Ensures schema matches the database migration and prevents duplicate submissions
	unique('daily_completions_anonymous_id_date_unique').on(table.anonymousId, table.date),
]);

export type DailyCompletion = typeof dailyCompletions.$inferSelect;

export const verseSubmissions = sqliteTable('verse_submissions', {
	id: text('id').primaryKey(),
	// Nullable so ON DELETE SET NULL can clear attribution when a user is deleted;
	// the scheduled verse still plays out (canonical text lives on daily_verses).
	userId: text('user_id').references(() => user.id, { onDelete: 'set null' }),
	scheduledDate: text('scheduled_date').notNull().unique(),
	selectedBookId: text('selected_book_id').notNull(),
	selectedChapter: integer('selected_chapter').notNull(),
	selectedVerse: integer('selected_verse').notNull(),
	// Raw integer of server UTC milliseconds — drives the 7-day rolling cooldown.
	submittedAt: integer('submitted_at').notNull(),
}, (table) => [
	index('verse_submissions_user_id_idx').on(table.userId),
]);

export type VerseSubmission = typeof verseSubmissions.$inferSelect;

// ── Statistics dashboard (see statistics-plan.md) ────────────────────────────
// One immutable row per "as of" day. Payload/config/playerState are JSON text.
export const statsSnapshot = sqliteTable('stats_snapshot', {
	// as-of date, YYYY-MM-DD
	date: text('date').primaryKey(),
	// build time (server timestamp)
	generatedAt: integer('generated_at', { mode: 'timestamp' }).notNull(),
	// scheduled | lazy | reconstructed
	buildKind: text('build_kind').notNull(),
	// stable hash of the settings used at build time
	configVersion: text('config_version').notNull(),
	// all aggregate series / lab data
	payload: text('payload').notNull(),
	// compact per-player state for render-time segmentation (JSON)
	playerState: text('player_state'),
	// copy of the resolved settings used at build time (JSON)
	config: text('config').notNull()
});

export type StatsSnapshot = typeof statsSnapshot.$inferSelect;

// Generic, extensible event log. Unlocks instrumentation B/D/E/F now; C later.
export const analyticsEvents = sqliteTable('analytics_events', {
	id: text('id').primaryKey(),
	name: text('name').notNull(),
	anonymousId: text('anonymous_id'),
	// Nullable so ON DELETE SET NULL keeps historical events when a user is deleted.
	userId: text('user_id').references(() => user.id, { onDelete: 'set null' }),
	date: text('date'),
	createdAt: integer('created_at', { mode: 'timestamp' }).notNull(),
	metadata: text('metadata')
}, (table) => [
	index('analytics_events_name_date_idx').on(table.name, table.date),
	index('analytics_events_anonymous_id_date_idx').on(table.anonymousId, table.date),
	// Dedupe verse_served per player per day (reloads), without collapsing
	// legitimate repeat events like multiple shares in a day.
	uniqueIndex('analytics_events_serve_unique')
		.on(table.name, table.anonymousId, table.date)
		.where(sql`${table.name} = 'verse_served'`)
]);

export type AnalyticsEvent = typeof analyticsEvents.$inferSelect;

// Simple key/value store for dashboard thresholds (env vars provide defaults).
export const dashboardSettings = sqliteTable('dashboard_settings', {
	key: text('key').primaryKey(),
	value: text('value').notNull(),
	updatedAt: integer('updated_at', { mode: 'timestamp' }).notNull()
});

export type DashboardSetting = typeof dashboardSettings.$inferSelect;