import {
	pgTable,
	varchar,
	text,
	integer,
	uuid,
	index,
	uniqueIndex
} from 'drizzle-orm/pg-core';
import { companies, users } from './tenancy';
import { wikiScopeEnum, pk, fk, createdAt, updatedAt, deletedAt, slugCol } from './_shared';

// One wiki page per (company, scope, slug). scope_id is null for global pages.
// Unique-with-NULLS-NOT-DISTINCT on (company_id, scope_type, scope_id, slug)
// is added in the follow-up SQL migration (Drizzle can't express it).
export const wikiPages = pgTable(
	'wiki_pages',
	{
		id: pk(),
		companyId: fk('company_id')
			.notNull()
			.references(() => companies.id, { onDelete: 'cascade' }),
		scopeType: wikiScopeEnum('scope_type').notNull(),
		scopeId: uuid('scope_id'), // null for global
		slug: slugCol(),
		title: varchar('title', { length: 255 }).notNull(),
		// Pointer to the latest wiki_revisions row. Set after first revision is written.
		currentRevisionId: fk('current_revision_id'),
		createdBy: fk('created_by').references(() => users.id, { onDelete: 'set null' }),
		createdAt: createdAt(),
		updatedAt: updatedAt(),
		deletedAt: deletedAt()
	},
	(t) => ({
		byScope: index('wiki_by_scope').on(t.scopeType, t.scopeId)
		// (company_id, scope_type, scope_id, slug) unique with NULLS NOT DISTINCT
		// is created in the follow-up SQL migration.
	})
);

export const wikiRevisions = pgTable(
	'wiki_revisions',
	{
		id: pk(),
		pageId: fk('page_id')
			.notNull()
			.references(() => wikiPages.id, { onDelete: 'cascade' }),
		revision: integer('revision').notNull(),
		title: varchar('title', { length: 255 }).notNull(),
		bodyMd: text('body_md').notNull(),
		// Maintained by trigger (declared as text, ALTERed to tsvector in follow-up).
		bodyTsv: text('body_tsv'),
		editedBy: fk('edited_by').references(() => users.id, { onDelete: 'set null' }),
		editedAt: createdAt(),
		comment: varchar('comment', { length: 500 })
	},
	(t) => ({
		pageRevUq: uniqueIndex('wiki_rev_page_rev_uq').on(t.pageId, t.revision),
		byPage: index('wiki_rev_by_page').on(t.pageId, t.revision)
	})
);

export type WikiPage = typeof wikiPages.$inferSelect;
export type WikiRevision = typeof wikiRevisions.$inferSelect;