import {z} from 'zod'

export type TokenSequence = {tokens?: (Array<number> | null) | undefined};

export type ResponseFormatJsonSchemaSchema = {schema: {[key: string]: unknown}};

export type ResponseFormatJsonSchema = {type: 'json_schema', json_schema: ResponseFormatJsonSchemaSchema};

export type ResponseFormatJsonObject = {type: 'json_object'};

export type ResponseFormatRegex = {type: 'regex', schema: string};

export type ResponseFormatText = {type: 'text'};

export type ResponseFormat = ResponseFormatJsonSchema | ResponseFormatJsonObject | ResponseFormatRegex | ResponseFormatText;

export type StreamOptions = {include_usage?: (boolean | null) | undefined};

export type CompletionsDedicatedBodyWithPrompt = {model: string, bad_word_tokens?: (Array<TokenSequence> | null) | undefined, bad_words?: (Array<string> | null) | undefined, embedding_to_replace?: (Array<number> | null) | undefined, encoder_no_repeat_ngram?: (number | null) | undefined, encoder_repetition_penalty?: (number | null) | undefined, eos_token?: (Array<number> | null) | undefined, forced_output_tokens?: (Array<number> | null) | undefined, frequency_penalty?: (number | null) | undefined, logprobs?: (number | null) | undefined, max_tokens?: (number | null) | undefined, max_total_tokens?: (number | null) | undefined, min_p?: (number | null) | undefined, min_tokens?: (number | null) | undefined, min_total_tokens?: (number | null) | undefined, n?: (number | null) | undefined, no_repeat_ngram?: (number | null) | undefined, presence_penalty?: (number | null) | undefined, repetition_penalty?: (number | null) | undefined, response_format?: (ResponseFormat | null) | undefined, seed?: (Array<number> | number | null) | undefined, stop?: (Array<string> | null) | undefined, stop_tokens?: (Array<TokenSequence> | null) | undefined, stream?: (boolean | null) | undefined, stream_options?: (StreamOptions | null) | undefined, temperature?: (number | null) | undefined, token_index_to_replace?: (Array<number> | null) | undefined, top_k?: (number | null) | undefined, top_p?: (number | null) | undefined, xtc_threshold?: (number | null) | undefined, xtc_probability?: (number | null) | undefined, prompt: string | Array<string>};

export type CompletionsDedicatedBodyWithTokens = {model: string, bad_word_tokens?: (Array<TokenSequence> | null) | undefined, bad_words?: (Array<string> | null) | undefined, embedding_to_replace?: (Array<number> | null) | undefined, encoder_no_repeat_ngram?: (number | null) | undefined, encoder_repetition_penalty?: (number | null) | undefined, eos_token?: (Array<number> | null) | undefined, forced_output_tokens?: (Array<number> | null) | undefined, frequency_penalty?: (number | null) | undefined, logprobs?: (number | null) | undefined, max_tokens?: (number | null) | undefined, max_total_tokens?: (number | null) | undefined, min_p?: (number | null) | undefined, min_tokens?: (number | null) | undefined, min_total_tokens?: (number | null) | undefined, n?: (number | null) | undefined, no_repeat_ngram?: (number | null) | undefined, presence_penalty?: (number | null) | undefined, repetition_penalty?: (number | null) | undefined, response_format?: (ResponseFormat | null) | undefined, seed?: (Array<number> | number | null) | undefined, stop?: (Array<string> | null) | undefined, stop_tokens?: (Array<TokenSequence> | null) | undefined, stream?: (boolean | null) | undefined, stream_options?: (StreamOptions | null) | undefined, temperature?: (number | null) | undefined, token_index_to_replace?: (Array<number> | null) | undefined, top_k?: (number | null) | undefined, top_p?: (number | null) | undefined, xtc_threshold?: (number | null) | undefined, xtc_probability?: (number | null) | undefined, tokens: Array<number>};

export type DedicatedCompletionsBody = CompletionsDedicatedBodyWithPrompt | CompletionsDedicatedBodyWithTokens;

export type CreateApiDedicatedV1CompletionsArgs = {'X-Friendli-Team'?: (string | null) | undefined, body: DedicatedCompletionsBody};

export type CreateApiDedicatedV1CompletionsOptions = {baseUrl?: string | undefined, token?: string | undefined, fetch?: typeof fetch | undefined};

export const promptTokensDetails = z.object({cached_tokens: z.number().int().nullable().optional()});

export const textUsage = z.object({prompt_tokens: z.number().int(), completion_tokens: z.number().int(), total_tokens: z.number().int(), prompt_tokens_details: promptTokensDetails.nullable().optional()});

export const completionsLogprobs = z.object({text_offset: z.array(z.number().int()), token_logprobs: z.array(z.number()), tokens: z.array(z.string()), top_logprobs: z.array(z.record(z.string(), z.unknown()))});

export const completionsChoice = z.object({index: z.number().int(), text: z.string(), logprobs: completionsLogprobs.nullable().optional(), seed: z.number().int(), finish_reason: z.enum(["stop", "length"]), tokens: z.array(z.number().int())});

export const dedicatedCompletionsSuccess = z.object({id: z.string(), object: z.literal("text_completion"), usage: textUsage, choices: z.array(completionsChoice), model: 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
};

/**
 * Completions
 * 
 * POST /dedicated/v1/completions
 */
export const createApiDedicatedV1Completions = async (args: CreateApiDedicatedV1CompletionsArgs, options?: CreateApiDedicatedV1CompletionsOptions) => {
const {baseUrl = "https://api.friendli.ai", fetch: fetchFn = fetch, token} = options ?? {}

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

if (args['X-Friendli-Team'] != null) headers.set("X-Friendli-Team", String(args['X-Friendli-Team']))
if (token !== undefined) headers.set('authorization', `Bearer ${token}`)

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