import {z} from 'zod'

export type NaicVariableRateMappingRequestV1 = {variableRateId: number, returnTypeName: string, returnComponentName: string};

export type NaicGeneratorParametersRequestV1 = {datasetDate: string, scenarioSet?: ('Full10000Scenarios' | 'SubsetScenarios' | 'StochasticExclusionTestScenarios' | null) | undefined, numberOfScenarios?: (number | null) | undefined, scenarioSubsetMethod?: ('SignificanceValue' | 'LargeCapGrowthWealthFactor' | 'FirstN' | null) | undefined, scenarioNumbering?: ('RenumberInAscendingOrder' | 'KeepOriginalScenarioNumbers' | null) | undefined, variableRateMappings?: (Array<NaicVariableRateMappingRequestV1> | null) | undefined};

export type GenerateScenarioTableRequestV1 = {modelId: number, generatorType?: ('NAICGenerator' | null) | undefined, name: string, filePath: string, yearsToProject: number, yieldCurveRateType?: ('BondEquivalent' | 'SpotRate' | null) | undefined, naicGeneratorParameters?: NaicGeneratorParametersRequestV1 | undefined};

export type CreateApiApiV1ScenarioTablesGenerateArgs = {body: GenerateScenarioTableRequestV1};

export type CreateApiApiV1ScenarioTablesGenerateOptions = {baseUrl: string, APIToken?: string | undefined, fetch?: typeof fetch | undefined};

export const generateScenarioTableResponseV1 = z.object({generationId: z.number().int().optional()});

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
};

/**
 * Generate a scenario table from a generator.
 * 
 * POST /api/v1/ScenarioTables/Generate
 */
export const createApiApiV1ScenarioTablesGenerate = async (args: CreateApiApiV1ScenarioTablesGenerateArgs, options: CreateApiApiV1ScenarioTablesGenerateOptions) => {
const {baseUrl, fetch: fetchFn = fetch, APIToken} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/ScenarioTables/Generate${query.size > 0 ? `?${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(generateScenarioTableResponseV1, await res.json())
};