import {z} from 'zod'

export type PageLimit = number;

export type PageCursor = string;

export type CurrencyCode = string;

export type ProductType = 'PRODUCT' | 'BUNDLE';

export type GetApiProductsArgs = {status?: string | undefined, limit?: PageLimit | undefined, cursor?: PageCursor | undefined, currency?: CurrencyCode | undefined, type?: Array<ProductType> | undefined};

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

export const productType = z.enum(["PRODUCT", "BUNDLE"]);

export const currencyCode = z.string();

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

export const fixedRecurringPrice = z.object({amount: monetaryAmount, interval_months: z.number().int().gte(1).lte(12), type: z.string()});

export const oneTimePrice = z.object({amount: monetaryAmount, type: z.string()});

export const perUnitBilling = z.object({type: z.string(), amount: monetaryAmount, units: z.number().int().gte(1)});

export const tier = z.object({up_to: z.number().int().gte(1), flat_price: monetaryAmount.optional(), per_unit_price: monetaryAmount.optional()});

export const tieredBilling = z.object({type: z.string(), mode: z.enum(["GRADUATED", "METERED"]), tiers: z.array(tier)});

export const billingScheme = z.discriminatedUnion("type", [perUnitBilling, tieredBilling]);

export const usagePrice = z.object({interval_months: z.number().int().gte(1).lte(12), type: z.string(), billing_scheme: billingScheme});

export const price = z.discriminatedUnion("type", [fixedRecurringPrice, oneTimePrice, usagePrice]);

export const revenuePattern = z.enum(["DAILY", "EVEN_PERIOD", "PROGRESS"]);

export const progressMeasure = z.literal("MILESTONES");

export const milestoneValueMode = z.enum(["PERCENTAGE", "AMOUNT"]);

export const milestoneExpectedOffset = z.object({count: z.number().int().gte(0), unit: z.enum(["DAYS", "MONTHS", "YEARS"])});

export const milestoneTemplate = z.object({key: z.string(), name: z.string().min(1), sequence: z.number().int().gte(1), value: z.string(), expected_offset: milestoneExpectedOffset.nullable().optional(), id: z.string()});

export const progressPlanTemplate = z.object({measure: progressMeasure, value_mode: milestoneValueMode, milestones: z.array(milestoneTemplate)});

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

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

export const accountCode = z.string();

export const bundleInvoiceDisplay = z.enum(["BUNDLE_AND_COMPONENTS", "BUNDLE_LINE_ONLY"]);

export const bundleComponent = z.object({product_id: z.string(), quantity: z.string()});

export const bundleDetails = z.object({invoice_display: bundleInvoiceDisplay, components: z.array(bundleComponent)});

export const product = z.object({id: z.string(), type: productType, name: z.string(), description: z.string(), price: price, include_in_arr_mrr: z.boolean(), include_in_ssp: z.boolean().optional(), revenue_pattern: revenuePattern.optional(), progress_plan_template: progressPlanTemplate.nullable().optional(), external_references: z.array(externalReference).optional(), fields: fieldAssignments, status: z.enum(["ACTIVE", "INACTIVE"]), account_code: accountCode.optional(), bundle: bundleDetails.optional()});

export const pageCursor = z.string();

export const pagination = z.object({next_cursor: pageCursor.optional()});

export const getApiProductsResponse = z.object({products: z.array(product), pagination: pagination});

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
};

/**
 * Lists all products
 * 
 * GET /products
 */
export const getApiProducts = async (args: GetApiProductsArgs, options?: GetApiProductsOptions) => {
const {baseUrl = "https://api.rillet.com", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (args.status != null) query.append("status", String(args.status))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.cursor != null) query.append("cursor", String(args.cursor))
if (args.currency != null) query.append("currency", String(args.currency))
if (args.type != null) query.append("type", args.type.join(','))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

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

const res = await fetchFn(url, {method: "GET", headers})

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

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