import {z} from 'zod'

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

export const apiVideoMode = z.enum(["text", "image", "frames", "references", "video_to_video"]);

export const apiResolution = z.enum(["480p", "720p", "1080p", "2k", "4k"]);

export const apiVideoResolutionOption = z.object({resolution: apiResolution, label: z.string(), credits_per_second: z.number()});

export const apiAspectRatio = z.enum(["16:9", "9:16", "1:1"]);

export const apiVideoModel = z.object({id: z.string(), title: z.string(), description: z.string(), modes: z.array(apiVideoMode), resolutions: z.array(apiVideoResolutionOption), default_resolution: apiResolution, durations: z.array(z.number().int()), default_duration: z.number().int(), aspect_ratios: z.array(apiAspectRatio), supports_audio: z.boolean(), max_reference_images: z.number().int().nullable().optional(), max_reference_videos: z.number().int().nullable().optional(), output_duration_follows_source: z.boolean()});

export const listVideoModelsResponse = z.object({models: z.array(apiVideoModel)});

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 video models
 * 
 * GET /video/models
 */
export const getApiVideoModels = async (options?: GetApiVideoModelsOptions) => {
const {baseUrl = "https://api.wondercraft.ai/v1", fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

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

if (APIKeyHeader !== undefined) headers.set("X-API-KEY", APIKeyHeader)

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