@kody/doordash

import { callMcpTool, TOOLS, type DoorDashMcpAuthInput } from './mcp.ts'

const ACTIONS = ['list', 'apply', 'remove'] as const
export type PromoAction = (typeof ACTIONS)[number]

export type PromoInput = DoorDashMcpAuthInput & {
	action?: PromoAction
	storeId?: string | number
	cartUuid?: string
	promoCode?: string
	addressId?: string
	confirm?: boolean
	dryRun?: boolean
}

function shouldDryRun(input: PromoInput, mutating: boolean) {
	if (input.dryRun === true) return true
	if (mutating && input.confirm !== true && input.dryRun !== false) return true
	return false
}

export default async function promo(input: PromoInput = {}) {
	const action = (input.action ?? 'list') as PromoAction
	if (action === 'list') {
		const storeId = String(input.storeId ?? '').trim()
		if (!storeId) throw new Error('storeId is required for promo list.')
		const args: Record<string, unknown> = { store_id: storeId }
		if (input.addressId) args.address_id = String(input.addressId)
		return callMcpTool({ ...input, name: TOOLS.listPromos, arguments: args })
	}
	const cartUuid = String(input.cartUuid ?? '').trim()
	const promoCode = String(input.promoCode ?? '').trim()
	if (!cartUuid || !promoCode) {
		throw new Error('cartUuid and promoCode are required for apply/remove.')
	}
	return callMcpTool({
		...input,
		name: action === 'apply' ? TOOLS.applyPromo : TOOLS.removePromo,
		arguments: { cart_uuid: cartUuid, promo_code: promoCode },
		dryRun: shouldDryRun(input, true),
	})
}