import {z} from 'zod'

export type PricingTierDto = {tier: number, amount: number, amountType: 'PER_ITEM' | 'TOTAL_INVOICE', tierMinimum: number};

export type DiscountDto = {type?: ('PERCENTAGE' | 'FIXED') | undefined, amount?: string | undefined, note?: string | undefined};

export type SeatBasedObligationConfigDto = {isMovingMinimum: boolean, minQuantity: number, defaultProrationPolicy: 'NONE' | 'DAY' | 'MONTH' | 'YEAR', defaultTrueUpTiming: 'IMMEDIATE' | 'CO_TERM'};

export type CreateBillingTermDto = {name?: string | undefined, description?: string | undefined, billingStartDate: string, isRecurring: boolean, includeInArr?: boolean | undefined, interval: 'NONE' | 'DAY' | 'MONTH' | 'HOUR' | 'YEAR' | 'QUARTER' | 'SEMI_MONTH' | 'WEEK', intervalFrequency: number, duration?: number | undefined, invoiceDateStrategy: 'FIRST_OF_PERIOD' | 'LAST_OF_PERIOD' | 'ARREARS' | 'ADVANCED_DUE_START', netPaymentTerms: number, quantity: number, billingType: 'UNIT' | 'FLAT', pricingType: 'SIMPLE' | 'TIERED' | 'VOLUME', eventTypeId?: string | undefined, itemId?: string | undefined, productId?: (string | null) | undefined, classId?: string | undefined, departmentId?: string | undefined, projectId?: string | undefined, pricing: Array<PricingTierDto>, discount?: DiscountDto | undefined, billingTermGroupId?: string | undefined, seatConfig?: SeatBasedObligationConfigDto | undefined};

export type CreateApiV3ContractsIdBillingTermsArgs = {id: string, body: CreateBillingTermDto};

export type CreateApiV3ContractsIdBillingTermsOptions = {baseUrl?: string | undefined, customHeader?: string | undefined, fetch?: typeof fetch | undefined};

export const seatBasedObligationConfigDto = z.object({isMovingMinimum: z.boolean(), minQuantity: z.number(), defaultProrationPolicy: z.enum(["NONE", "DAY", "MONTH", "YEAR"]), defaultTrueUpTiming: z.enum(["IMMEDIATE", "CO_TERM"])});

export const integratorsApiError = z.object({code: z.number(), message: z.string(), details: z.object({}).optional()});

export const createApiV3ContractsIdBillingTermsResponse = z.object({payload: z.object({description: z.string().optional(), billingStartDate: z.string(), isRecurring: z.boolean(), includeInArr: z.boolean().optional(), interval: z.enum(["NONE", "DAY", "MONTH", "HOUR", "YEAR", "QUARTER", "SEMI_MONTH", "WEEK"]), intervalFrequency: z.number(), duration: z.number().optional(), netPaymentTerms: z.number(), quantity: z.number(), billingType: z.enum(["UNIT", "FLAT"]), pricingType: z.enum(["SIMPLE", "TIERED", "VOLUME"]), eventTypeId: z.string().optional(), itemId: z.string().optional(), productId: z.string().nullable().optional(), classId: z.string().optional(), departmentId: z.string().optional(), projectId: z.string().optional(), billingTermGroupId: z.string().optional(), seatConfig: seatBasedObligationConfigDto.optional(), id: z.string(), contractId: z.string(), name: z.string(), billingEndDate: z.string(), createdAt: z.string()}), success: z.boolean(), message: z.string(), error: integratorsApiError});

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 contract billing term
 * 
 * POST /v3/contracts/{id}/billing-terms
 */
export const createApiV3ContractsIdBillingTerms = async (args: CreateApiV3ContractsIdBillingTermsArgs, options?: CreateApiV3ContractsIdBillingTermsOptions) => {
const {baseUrl = "https://integrators.prod.api.tabsplatform.com", fetch: fetchFn = fetch, customHeader} = options ?? {}

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

if (customHeader !== undefined) headers.set("Authorization", customHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/v3/contracts/${encodeURIComponent(String(args.id))}/billing-terms${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(createApiV3ContractsIdBillingTermsResponse, await res.json())
};