import {z} from 'zod'

export type AccountCode = string;

export type CurrencyCode = string;

export type RoundedMonetaryAmount = {amount: string, currency: CurrencyCode};

export type CountryCode = string;

export type ExpenseTaxRate = {percentage: unknown, tax_amount: RoundedMonetaryAmount, country: CountryCode, type: 'VAT' | 'SALES_TAX', description: string, tax_code?: string | undefined, coverage: 'INCLUSIVE' | 'EXCLUSIVE'};

export type CalendarPeriod = {start: string, end: string};

export type FieldAssignments = Array<{field_id: string, field_value_id: string}>;

export type CreateReimbursementItemRequest = {description?: string | undefined, account_code: AccountCode, amount: RoundedMonetaryAmount, tax_rate?: ExpenseTaxRate | undefined, service_period?: CalendarPeriod | undefined, fields?: FieldAssignments | undefined};

export type ExternalReference = {type: string, id: string, url?: string | undefined};

export type ExchangeRate = {base: CurrencyCode, target: CurrencyCode, rate: string, date: string};

export type CreateReimbursementRequest = {vendor_id: string, items: Array<CreateReimbursementItemRequest>, reimbursement_date: string, payable_account_code: AccountCode, impact_date?: string | undefined, subsidiary_id?: string | undefined, external_references?: Array<ExternalReference> | undefined, exchange_rate?: ExchangeRate | undefined};

export type CreateApiReimbursementsArgs = {body: CreateReimbursementRequest};

export type CreateApiReimbursementsOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const accountCode = z.string();

export const currencyCode = z.string();

export const roundedMonetaryAmount = z.object({amount: z.string(), currency: currencyCode});

export const countryCode = z.string();

export const expenseTaxRate = z.object({percentage: z.string(), tax_amount: roundedMonetaryAmount, country: countryCode, type: z.enum(["VAT", "SALES_TAX"]), description: z.string(), tax_code: z.string().optional(), coverage: z.enum(["INCLUSIVE", "EXCLUSIVE"])});

export const calendarPeriod = z.object({start: z.string(), end: z.string()});

export const fieldAssignments = z.array(z.object({field_id: z.string(), field_value_id: z.string()}));

export const externalReference = z.object({type: z.string(), id: z.string(), url: z.string().optional()});

export const exchangeRate = z.object({base: currencyCode, target: currencyCode, rate: z.string(), date: z.string()});

export const reimbursementStatus = z.enum(["DRAFT", "UNPAID", "PAID", "PARTIALLY_PAID"]);

export const pendingApprovalRequest = z.object({id: z.string(), workflow_id: z.string(), operation: z.enum(["CREATE", "UPDATE", "DELETE"]), status: z.literal("PENDING")});

export const reimbursement = z.object({vendor_id: z.string(), items: z.array(z.object({description: z.string().optional(), account_code: accountCode, amount: roundedMonetaryAmount, tax_rate: expenseTaxRate.optional(), service_period: calendarPeriod.optional(), fields: fieldAssignments.optional(), id: z.string()})), reimbursement_date: z.string().optional(), impact_date: z.string().optional(), subsidiary_id: z.string().optional(), external_references: z.array(externalReference).optional(), exchange_rate: exchangeRate.optional(), id: z.string(), status: reimbursementStatus, pending_approval_request: pendingApprovalRequest.nullable().optional(), updated_at: z.string()});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * Create a reimbursement
 * 
 * POST /reimbursements
 */
export const createApiReimbursements = async (args: CreateApiReimbursementsArgs, options?: CreateApiReimbursementsOptions) => {
const {baseUrl = "https://api.rillet.com", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('content-type', "application/json")
headers.set('accept', "application/json")

if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/reimbursements${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(reimbursement, await res.json())
};