import {z} from 'zod'

export type CreateApiExplorationMapArgs = {body: {sources: Array<{type: 'channel', channelId: string} | {type: 'query', query: string} | {type: 'brand', brandId: string} | {type: 'audience', audienceId: string, preset?: boolean | undefined} | {type: 'channels', channelIds: Array<string>, label: string, of?: Array<string> | undefined} | {type: 'topic', topic: string, kind: 'conversation' | 'content'} | {type: 'campaign', campaignId: string} | {type: 'link', url: string} | {type: 'inclusion_list', listId: string} | {type: 'project', projectId: string, selection?: string | undefined, channelIds?: Array<string> | undefined}>, size?: number | undefined}};

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

export const createApiExplorationMapResponse = z.object({title: z.string(), url: z.string(), builtAt: z.string(), canExpand: z.boolean(), notes: z.array(z.string()), audience: z.object({corePeople: z.number(), totalPeople: z.number(), totalComments: z.number()}).nullable(), groups: z.array(z.object({id: z.number(), name: z.string(), kind: z.enum(["core", "adjacent", "unconnected"]), description: z.string(), themes: z.array(z.string()), relevance: z.number().nullable(), channelIds: z.array(z.string()), expand: z.object({type: z.literal("channels"), channelIds: z.array(z.string()), label: z.string()}), people: z.number().nullable(), reach: z.number().nullable(), concentration: z.number().nullable(), fanDensity: z.number().nullable()})), channels: z.array(z.object({channelId: z.string(), title: z.string(), handle: z.string().nullable(), imageUrl: z.string(), subscribers: z.number(), country: z.string().nullable(), groupId: z.number(), seed: z.boolean(), relevance: z.number().nullable(), sharedCommenters: z.number(), audienceThemes: z.array(z.string()), contentThemes: z.array(z.string()), people: z.number().nullable(), reach: z.number().nullable(), concentration: z.number().nullable(), fanDensity: z.number().nullable()}))});

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
};

/**
 * Map an audience
 * 
 * POST /exploration/map
 */
export const createApiExplorationMap = async (args: CreateApiExplorationMapArgs, options?: CreateApiExplorationMapOptions) => {
const {baseUrl = "https://www.fandom.ai/api/v1", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

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

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