import {z} from 'zod'

export type GetApiV1TicketsIdSuggestionsArgs = {id: number};

export type GetApiV1TicketsIdSuggestionsOptions = {baseUrl: string, Bearer?: string | undefined, fetch?: typeof fetch | undefined};

export const copilotSuggestionArticle = z.object({title: z.string().nullable().optional(), articleId: z.string().nullable().optional(), slug: z.string().nullable().optional(), language: z.string().nullable().optional(), deskId: z.string().nullable().optional(), updatedAt: z.string().nullable().optional()});

export const copilotSuggestionSources = z.object({articles: z.array(copilotSuggestionArticle).nullable().optional(), pastConversationUsed: z.boolean().optional(), pastSuggestionUsed: z.boolean().optional(), contactInfoUsed: z.boolean().optional()});

export const copilotSuggestionItem = z.object({title: z.string().nullable().optional(), text: z.string().nullable().optional(), confidence: z.number().int().optional(), sources: copilotSuggestionSources.optional(), suggestionId: z.number().int().nullable().optional(), feedback: z.string().nullable().optional()});

export const roomSuggestionsDto = z.object({suggestions: z.array(copilotSuggestionItem).nullable().optional(), generatedAt: z.string().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
};

/**
 * Get the current copilot suggestion snapshot for a ticket, proxied from
 * copilot-service. Ticket analog of `GET /v1/chat/rooms/{roomId}/suggestions`.
 * Returns the raw DTO — NOT wrapped in `ApiResponse` — to mirror the chat
 * suggestions endpoint and the shape the ticket FE hook consumes (reads
 * `.suggestions` off the body directly).
 * FAIL-OPEN: copilot-service being unconfigured, slow or down yields an empty
 * snapshot (200 with an empty list), never an error.
 * 
 * GET /v1/tickets/{id}/suggestions
 * 
 * Also accepts auth: API Key
 */
export const getApiV1TicketsIdSuggestions = async (args: GetApiV1TicketsIdSuggestionsArgs, options: GetApiV1TicketsIdSuggestionsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, Bearer} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/v1/tickets/${encodeURIComponent(String(args.id))}/suggestions${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(roomSuggestionsDto, await res.json())
};