import {
	bigint,
	boolean,
	check,
	index,
	integer,
	jsonb,
	text,
	timestamp,
	unique
} from 'drizzle-orm/pg-core';
import { sql } from 'drizzle-orm';
import { metaSchema } from './schemas';

// Registry of GUI-visible tables. Runtime lists live in schema `lists` (one real
// table per list, created through meta.create_list()); that schema is excluded
// from drizzle-kit via schemaFilter. Structure truth is pg_catalog; these rows are
// presentation. See src/lib/server/lists.ts for the list engine.
const ts = (name: string) => timestamp(name, { withTimezone: true });

export const metaTables = metaSchema.table(
	'tables',
	{
		id: integer('id').primaryKey().generatedByDefaultAsIdentity(),
		schemaName: text('schema_name').notNull(),
		tableName: text('table_name').notNull(),
		slug: text('slug').notNull().unique('tables_slug_key'),
		displayName: text('display_name').notNull(),
		description: text('description'),
		icon: text('icon'),
		pictureUrl: text('picture_url'),
		kind: text('kind', { enum: ['list', 'core', 'ref'] }).notNull(),
		editable: boolean('editable').notNull().default(true),
		hasDone: boolean('has_done').notNull().default(false),
		defaultSort: text('default_sort'),
		sortOrder: integer('sort_order').notNull().default(0),
		archivedAt: ts('archived_at'),
		createdAt: ts('created_at').notNull().defaultNow(),
		updatedAt: ts('updated_at').notNull().defaultNow()
	},
	(t) => [
		unique('tables_schema_name_table_name_key').on(t.schemaName, t.tableName),
		check('tables_slug_check', sql`slug ~ '^[a-z0-9][a-z0-9-]{0,62}$'`),
		check('tables_kind_check', sql`kind IN ('list','core','ref')`)
	]
);

export const uiTypes = [
	'text',
	'longtext',
	'url',
	'image',
	'number',
	'cents',
	'date',
	'datetime',
	'bool',
	'select',
	'multiselect',
	'fk',
	'json'
] as const;
export type UiType = (typeof uiTypes)[number];

export const metaColumns = metaSchema.table(
	'columns',
	{
		id: integer('id').primaryKey().generatedByDefaultAsIdentity(),
		tableId: integer('table_id')
			.notNull()
			.references(() => metaTables.id, { onDelete: 'cascade' }),
		columnName: text('column_name').notNull(),
		label: text('label'),
		uiType: text('ui_type', { enum: uiTypes }).notNull(),
		options: jsonb('options').$type<{ values?: string[] }>().notNull().default({}),
		position: integer('position').notNull().default(0),
		hidden: boolean('hidden').notNull().default(false),
		helpText: text('help_text'),
		createdAt: ts('created_at').notNull().defaultNow(),
		updatedAt: ts('updated_at').notNull().defaultNow()
	},
	(t) => [
		unique('columns_table_id_column_name_key').on(t.tableId, t.columnName),
		index('columns_table_id_index').on(t.tableId),
		check(
			'columns_ui_type_check',
			sql`ui_type IN ('text','longtext','url','image','number','cents','date','datetime','bool','select','multiselect','fk','json')`
		)
	]
);

/** Audit trail of every write made through the database browser (/lists/db). */
export const metaEditLog = metaSchema.table(
	'edit_log',
	{
		id: bigint('id', { mode: 'number' }).primaryKey().generatedAlwaysAsIdentity(),
		at: ts('at').notNull().defaultNow(),
		userId: text('user_id'),
		userEmail: text('user_email'),
		schemaName: text('schema_name').notNull(),
		tableName: text('table_name').notNull(),
		action: text('action').notNull(),
		pk: jsonb('pk'),
		before: jsonb('before'),
		after: jsonb('after')
	},
	(t) => [
		index('edit_log_table_at_index').on(t.schemaName, t.tableName, t.at),
		check(
			'edit_log_action_check',
			sql`action IN ('insert','update','delete','import','add_column')`
		)
	]
);

export type MetaTable = typeof metaTables.$inferSelect;
export type MetaColumn = typeof metaColumns.$inferSelect;