import {z} from 'zod'

export type FootageRulesDTO = {source?: ('prefer_library' | 'fallback' | 'library_only' | 'never') | undefined, roll?: ('a_first' | 'b_first' | 'mix') | undefined, generate_missing?: boolean | undefined, threshold?: number | undefined, character?: ('strict' | 'loose') | undefined, instructions?: string | undefined};

export type MomentRefDTO = {item_id: string, moment_id: string};

export type EditPlanDTO = {text: string, mode?: ('idea' | 'script') | undefined, duration_seconds?: number | undefined, footage_rules?: FootageRulesDTO | undefined, item_ids?: Array<string> | undefined, picks?: Array<MomentRefDTO> | undefined, picks_only?: boolean | undefined, presenter?: (string | null) | undefined, domain_id?: (string | null) | undefined};

export type CreateApiApiV1VideoLibraryGeneratePlanArgs = {body: EditPlanDTO};

export type CreateApiApiV1VideoLibraryGeneratePlanOptions = {baseUrl: string, JWTBearer?: string | undefined, fetch?: typeof fetch | undefined};

export const createApiApiV1VideoLibraryGeneratePlanResponse = z.unknown();

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
};

/**
 * Plan a video from a script or idea: beats, and the library footage an LLM picks for each
 * 
 * POST /api/v1/video-library/generate/plan
 */
export const createApiApiV1VideoLibraryGeneratePlan = async (args: CreateApiApiV1VideoLibraryGeneratePlanArgs, options: CreateApiApiV1VideoLibraryGeneratePlanOptions) => {
const {baseUrl, fetch: fetchFn = fetch, JWTBearer} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/video-library/generate/plan${query.size > 0 ? `?${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(createApiApiV1VideoLibraryGeneratePlanResponse, await res.json())
};