import {z} from 'zod'

export type GetApiV1OrgOrgIdBudgetBudgetIdBaselineVarianceArgs = {orgId: string, budgetId: string, start?: string | undefined, end?: string | undefined, interval?: ('DAY' | 'WEEK' | 'MONTH' | 'QUARTER' | 'FISCAL_QUARTER' | 'YEAR' | 'FISCAL_YEAR') | undefined};

export type GetApiV1OrgOrgIdBudgetBudgetIdBaselineVarianceOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const money = z.object({amount: z.number(), currency: z.string(), places: z.number().int().optional()});

export const baselineInterval = z.object({periodStart: z.string(), baselineValue: money.optional(), effectiveSince: z.string().optional()});

export const baselineChange = z.object({date: z.string(), from: money.optional(), to: money.optional(), userId: z.string()});

export const budgetBaselineVarianceResponse = z.object({intervals: z.array(baselineInterval), baselineChanges: z.array(baselineChange)});

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 a budget's baseline value over time (step line + re-baseline markers) for the variance chart
 * 
 * GET /v1/org/{orgId}/budget/{budgetId}/baseline-variance
 */
export const getApiV1OrgOrgIdBudgetBudgetIdBaselineVariance = async (args: GetApiV1OrgOrgIdBudgetBudgetIdBaselineVarianceArgs, options?: GetApiV1OrgOrgIdBudgetBudgetIdBaselineVarianceOptions) => {
const {baseUrl = "https://localhost", fetch: fetchFn = fetch} = options ?? {}

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

if (args.start != null) query.append("start", String(args.start))
if (args.end != null) query.append("end", String(args.end))
if (args.interval != null) query.append("interval", String(args.interval))

const url = `${baseUrl.replace(/\/+$/, '')}/v1/org/${encodeURIComponent(String(args.orgId))}/budget/${encodeURIComponent(String(args.budgetId))}/baseline-variance${query.size > 0 ? `?${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(budgetBaselineVarianceResponse, await res.json())
};