import {z} from 'zod'

export type OrderBy = 'asc' | 'desc';

export type GetApiConstraintsArgs = {include_absolute_costs?: boolean | undefined, include_timestamps?: boolean | undefined, include_dataset_metadata?: boolean | undefined, absolute_cost_start_time?: (string | null) | undefined, absolute_cost_end_time?: (string | null) | undefined, api_key?: (string | null) | undefined, isos?: (string | null) | undefined, active_after?: (string | null) | undefined, limit?: (number | null) | undefined, sort_order?: (OrderBy | null) | undefined, search?: (string | null) | undefined, sort_column?: ('constraint_name' | 'market_id' | 'earliest_seen_utc' | 'latest_seen_utc' | null) | undefined, 'x-api-key'?: (string | null) | undefined};

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

export const constraintResponse = z.object({gs_entity_id: z.string(), constraint_name: z.string(), market_id: z.string(), earliest_seen_utc: z.string().nullable(), latest_seen_utc: z.string().nullable(), available_datasets: z.array(z.string()).nullable(), rt_absolute_cost: z.number().nullable().optional(), da_absolute_cost: z.number().nullable().optional(), gs_created_at_utc: z.string().nullable().optional(), gs_updated_at_utc: z.string().nullable().optional()});

export const constraintPricingDatasetSpecResponse = z.object({dataset_id: z.string(), shadow_price_column: z.string()});

export const constraintsListResponse = z.object({data: z.array(constraintResponse), dataset_metadata: z.record(z.string(), z.record(z.string(), z.array(constraintPricingDatasetSpecResponse))).nullable().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
};

/**
 * List Constraints
 * 
 * GET /constraints
 */
export const getApiConstraints = async (args: GetApiConstraintsArgs, options?: GetApiConstraintsOptions) => {
const {baseUrl = "https://api.gridstatus.io/v1", fetch: fetchFn = fetch} = options ?? {}

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

if (args.include_absolute_costs != null) query.append("include_absolute_costs", String(args.include_absolute_costs))
if (args.include_timestamps != null) query.append("include_timestamps", String(args.include_timestamps))
if (args.include_dataset_metadata != null) query.append("include_dataset_metadata", String(args.include_dataset_metadata))
if (args.absolute_cost_start_time != null) query.append("absolute_cost_start_time", String(args.absolute_cost_start_time))
if (args.absolute_cost_end_time != null) query.append("absolute_cost_end_time", String(args.absolute_cost_end_time))
if (args.api_key != null) query.append("api_key", String(args.api_key))
if (args.isos != null) query.append("isos", String(args.isos))
if (args.active_after != null) query.append("active_after", String(args.active_after))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.sort_order != null) query.append("sort_order", String(args.sort_order))
if (args.search != null) query.append("search", String(args.search))
if (args.sort_column != null) query.append("sort_column", String(args.sort_column))
if (args['x-api-key'] != null) headers.set("x-api-key", String(args['x-api-key']))

const url = `${baseUrl.replace(/\/+$/, '')}/constraints${query.size > 0 ? `?${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(constraintsListResponse, await res.json())
};