import {z} from 'zod'

export type GetApiApiV1DashboardPortfolioArgs = {portfolioId: string, asOf?: string | undefined, productIds?: (Array<string> | null) | undefined, productVersionIds?: (Array<string> | null) | undefined, bucketCode?: ('current' | '1_30' | '31_60' | '61_90' | '91_plus' | 'par30' | 'par60' | 'par90') | undefined};

export type GetApiApiV1DashboardPortfolioOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const dashboardBucketHumaBody = z.object({bucketCode: z.string(), bucketLabel: z.string(), exposureAmount: z.string(), loanCount: z.number().int()});

export const dashboardDrillDownRow = z.object({assignedOfficerId: z.string(), assignedOfficerName: z.string(), borrowerId: z.string(), bucketCode: z.string(), daysOverdue: z.number().int(), earliestUnpaidDueDate: z.string(), exposureAmount: z.string(), loanId: z.string(), productId: z.string(), productVersionId: z.string()});

export const dashboardFreshnessHuma = z.object({generatedAt: z.string(), isStale: z.boolean(), liveFallbackUsed: z.boolean(), policyCode: z.string(), policyPersistedAt: z.string(), snapshotAsOfDate: z.string(), snapshotId: z.string(), source: z.string(), stalenessReason: z.string().optional()});

export const dashboardSummaryHumaBody = z.object({activeLoanCount: z.number().int(), currentExposure: z.string(), delinquentExposure: z.string(), delinquentLoanCount: z.number().int(), disbursementVolume: z.string(), outstandingExposure: z.string(), par30: z.string(), par60: z.string(), par90: z.string(), repaymentVolume: z.string()});

export const dashboardTrendPointHuma = z.object({asOfDate: z.string(), delinquentExposure: z.string(), delinquentLoanCount: z.number().int(), disbursementVolume: z.string(), month: z.string(), outstandingExposure: z.string(), par30: z.string(), par60: z.string(), par90: z.string(), repaymentVolume: z.string()});

export const portfolioDashboardHumaBody = z.object({asOfDate: z.string(), delinquencyDistribution: z.array(dashboardBucketHumaBody).nullable(), drillDown: z.array(dashboardDrillDownRow).nullable(), freshness: dashboardFreshnessHuma, portfolioId: z.string(), summary: dashboardSummaryHumaBody, trend: z.array(dashboardTrendPointHuma).nullable()});

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
};

/**
 * Get portfolio dashboard
 * 
 * GET /api/v1/dashboard/portfolio
 */
export const getApiApiV1DashboardPortfolio = async (args: GetApiApiV1DashboardPortfolioArgs, options?: GetApiApiV1DashboardPortfolioOptions) => {
const {baseUrl = "https://identity.sandbox.lerian.net", fetch: fetchFn = fetch} = options ?? {}

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

if (args.portfolioId != null) query.append("portfolioId", String(args.portfolioId))
if (args.asOf != null) query.append("asOf", String(args.asOf))
for (const item of args.productIds ?? []) query.append("productIds", String(item))
for (const item of args.productVersionIds ?? []) query.append("productVersionIds", String(item))
if (args.bucketCode != null) query.append("bucketCode", String(args.bucketCode))

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/dashboard/portfolio${query.size > 0 ? `?${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(portfolioDashboardHumaBody, await res.json())
};