import {z} from 'zod'

export type UpdateModelRequest = {name?: (string | null) | undefined, description?: (string | null) | undefined};

export type PatchApiV1FineTuningModelsModelIdArgs = {model_id: string, body: UpdateModelRequest};

export type PatchApiV1FineTuningModelsModelIdOptions = {baseUrl?: string | undefined, ApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const fineTunedModelCapabilities = z.object({completion_chat: z.boolean().optional(), completion_fim: z.boolean().optional(), function_calling: z.boolean().optional(), fine_tuning: z.boolean().optional(), classification: z.boolean().optional()});

export const completionFineTunedModel = z.object({id: z.string(), object: z.literal("model").optional(), created: z.number().int(), owned_by: z.string(), workspace_id: z.string(), root: z.string(), root_version: z.string(), archived: z.boolean(), name: z.string().nullable().optional(), description: z.string().nullable().optional(), capabilities: fineTunedModelCapabilities, max_context_length: z.number().int().optional(), aliases: z.array(z.string()).optional(), job: z.string().nullable().optional(), model_type: z.literal("completion").optional()});

export const fTClassifierLossFunction = z.enum(["single_class", "multi_class"]);

export const classifierTargetResult = z.object({name: z.string(), labels: z.array(z.string()), weight: z.number(), loss_function: fTClassifierLossFunction});

export const classifierFineTunedModel = z.object({id: z.string(), object: z.literal("model").optional(), created: z.number().int(), owned_by: z.string(), workspace_id: z.string(), root: z.string(), root_version: z.string(), archived: z.boolean(), name: z.string().nullable().optional(), description: z.string().nullable().optional(), capabilities: fineTunedModelCapabilities, max_context_length: z.number().int().optional(), aliases: z.array(z.string()).optional(), job: z.string().nullable().optional(), classifier_targets: z.array(classifierTargetResult), model_type: z.literal("classifier").optional()});

export const patchApiV1FineTuningModelsModelIdResponse = z.discriminatedUnion("model_type", [completionFineTunedModel, classifierFineTunedModel]);

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
};

/**
 * Update Fine Tuned Model
 * 
 * PATCH /v1/fine_tuning/models/{model_id}
 */
export const patchApiV1FineTuningModelsModelId = async (args: PatchApiV1FineTuningModelsModelIdArgs, options?: PatchApiV1FineTuningModelsModelIdOptions) => {
const {baseUrl = "https://api.mistral.ai", fetch: fetchFn = fetch, ApiKey} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/v1/fine_tuning/models/${encodeURIComponent(String(args.model_id))}${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "PATCH", 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(patchApiV1FineTuningModelsModelIdResponse, await res.json())
};