import {z} from 'zod'

export type PromptMessage = {role: string, content: string};

export type EvaluationModelProvider = 'OPEN_AI' | 'ANTHROPIC';

export type ModelSettings = {provider?: EvaluationModelProvider | undefined, name?: string | undefined, temperature?: number | undefined, maxTokens?: number | undefined, topP?: number | undefined, frequencyPenalty?: number | undefined, presencePenalty?: number | undefined, stopSequence?: Array<string> | undefined, reasoningEffort?: ('MINIMAL' | 'LOW' | 'MEDIUM' | 'HIGH') | undefined, verbosity?: ('LOW' | 'MEDIUM' | 'HIGH') | undefined};

export type OutputSchemaField = {id: string, name: string, type: string, required?: boolean | undefined, parentId?: string | undefined};

export type OutputSchema = {name: string, fields: Array<OutputSchemaField>};

export type Tool = {id?: string | undefined, name: string, description: string, mode: 'STRICT' | 'ADDITIONAL' | 'NO_ADDITIONAL', structuredSchema?: OutputSchema | undefined};

export type CreatePromptRequest = {alias: string, text?: string | undefined, messages?: Array<PromptMessage> | undefined, interpolationType?: ('MUSTACHE' | 'MUSTACHE_WITH_SPACE' | 'FSTRING' | 'DOLLAR_BRACKETS') | undefined, modelSettings?: ModelSettings | undefined, outputType?: ('TEXT' | 'JSON' | 'SCHEMA') | undefined, outputSchema?: OutputSchema | undefined, tools?: Array<Tool> | undefined, branch?: string | undefined};

export type CreateApiV1PromptsArgs = {body: CreatePromptRequest};

export type CreateApiV1PromptsOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const createPromptResponse = z.object({success: z.boolean(), data: z.object({promptId: z.string(), hash: z.string()}), link: z.string(), deprecated: z.boolean()});

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
};

/**
 * Push Prompts
 * 
 * POST /v1/prompts
 */
export const createApiV1Prompts = async (args: CreateApiV1PromptsArgs, options?: CreateApiV1PromptsOptions) => {
const {baseUrl = "https://api.confident-ai.com", fetch: fetchFn = fetch} = options ?? {}

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

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