import {z} from 'zod'

export type BackgroundScope = 'personal' | 'workspace' | 'default';

export type GetApiV1BackgroundsArgs = {scope?: BackgroundScope | undefined, categoryId?: string | undefined};

export type GetApiV1BackgroundsOptions = {baseUrl?: string | undefined, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const clipBackgroundOutput = z.object({color: z.string().nullable().optional(), gradientAngle: z.number().int().gte(-9007199254740991).lte(9007199254740991).nullable().optional(), gradientColor1: z.string().nullable().optional(), gradientColor2: z.string().nullable().optional(), imageUrl: z.string().nullable().optional(), shaderGradientPreset: z.string().nullable().optional(), sourceId: z.string().nullable().optional(), type: z.enum(["solid", "gradient", "image", "video", "shaderGradient", "ambient"]), videoDurationSeconds: z.number().gte(0).nullable().optional(), videoUrl: z.string().nullable().optional()});

export const backgroundItem = z.object({background: clipBackgroundOutput, name: z.string(), thumbnailUrl: z.string()});

export const backgroundScope = z.enum(["personal", "workspace", "default"]);

export const backgroundCategory = z.object({backgrounds: z.array(backgroundItem), id: z.string(), name: z.string(), scope: backgroundScope});

export const listBackgroundsResponse = z.object({categories: z.array(backgroundCategory)});

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 available backgrounds
 * 
 * GET /v1/backgrounds
 */
export const getApiV1Backgrounds = async (args: GetApiV1BackgroundsArgs, options?: GetApiV1BackgroundsOptions) => {
const {baseUrl = "https://api.tella.com", fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

if (args.scope != null) query.append("scope", String(args.scope))
if (args.categoryId != null) query.append("categoryId", String(args.categoryId))
if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

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