import {z} from 'zod'

export type GetApiApiV2LlmObsV1PromptsPromptIdArgs = {prompt_id: string, label?: string | undefined};

export type GetApiApiV2LlmObsV1PromptsPromptIdOptions = {baseUrl?: string | undefined, apiKeyAuth?: string | undefined, appKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const lLMObsPromptChatMessage = z.object({content: z.string(), role: z.string()});

export const lLMObsPromptMessagePlaceholderType = z.literal("placeholder");

export const lLMObsPromptMessagePlaceholder = z.object({name: z.string().min(1), type: lLMObsPromptMessagePlaceholderType});

export const lLMObsPromptChatTemplateItem = z.union([lLMObsPromptChatMessage, lLMObsPromptMessagePlaceholder]);

export const lLMObsPromptConfig = z.record(z.string(), z.unknown());

export const lLMObsPromptSDKDataAttributes = z.object({chat_template: z.array(lLMObsPromptChatTemplateItem).optional(), config: lLMObsPromptConfig.optional(), labels: z.array(z.string()).optional(), prompt_id: z.string().optional(), prompt_version_uuid: z.string().optional(), template: z.string().optional(), version: z.string().optional()});

export const lLMObsPromptType = z.literal("prompt-templates");

export const lLMObsPromptSDKData = z.object({attributes: lLMObsPromptSDKDataAttributes, id: z.string(), type: lLMObsPromptType});

export const lLMObsPromptSDKResponse = z.object({data: lLMObsPromptSDKData});

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 an Agent Observability prompt
 * 
 * GET /api/v2/llm-obs/v1/prompts/{prompt_id}
 * 
 * Also accepts auth: AuthZ
 */
export const getApiApiV2LlmObsV1PromptsPromptId = async (args: GetApiApiV2LlmObsV1PromptsPromptIdArgs, options?: GetApiApiV2LlmObsV1PromptsPromptIdOptions) => {
const {baseUrl = "https://api.datadoghq.com", fetch: fetchFn = fetch, apiKeyAuth, appKeyAuth} = options ?? {}

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

if (args.label != null) query.append("label", String(args.label))
if (apiKeyAuth !== undefined) headers.set("DD-API-KEY", apiKeyAuth)
if (appKeyAuth !== undefined) headers.set("DD-APPLICATION-KEY", appKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v2/llm-obs/v1/prompts/${encodeURIComponent(String(args.prompt_id))}${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(lLMObsPromptSDKResponse, await res.json())
};