import {z} from 'zod'

export type ContextLoadRequest = {input: string | Array<string>, inputType?: ('auto' | 'url' | 'urls' | 'query') | undefined, processUncached?: boolean | undefined, search?: ({topK?: number | undefined}) | undefined, processing?: ({maxConcurrent?: number | undefined, strategy?: ('auto' | 'fast' | 'quality') | undefined}) | undefined, return?: ({topK?: number | undefined, format?: ('hqcc' | 'raw' | 'both') | undefined}) | undefined, ranking?: ({preset?: ('cache_first' | 'relevance_first' | 'balanced') | undefined}) | undefined};

export type CreateApiApiContextLoadArgs = {body: ContextLoadRequest};

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

export const contextResult = z.object({url: z.string().optional(), title: z.string().optional(), hqcc: z.string().optional(), raw: z.string().nullable().optional(), cached: z.boolean().optional(), cachedAt: z.string().optional(), processed: z.boolean().optional(), found: z.boolean().optional(), rank: z.number().int().optional(), ranking: z.object({score: z.number().optional(), factors: z.object({cacheBoost: z.number().optional(), relevance: z.number().optional(), freshness: z.number().optional()}).optional()}).optional(), meta: z.object({strategy: z.string().optional(), model: z.string().optional(), source: z.string().optional(), title: z.string().optional(), wordCount: z.number().int().optional(), tokenCount: z.number().int().optional()}).optional()});

export const contextLoadResponse = z.object({success: z.boolean().optional(), requestId: z.string().optional(), mode: z.enum(["single_url", "batch_urls", "query"]).optional(), result: contextResult.optional(), results: z.array(contextResult).optional(), summary: z.object({totalResults: z.number().int().optional(), cachedResults: z.number().int().optional(), newResults: z.number().int().optional(), mode: z.string().optional()}).optional(), cost: z.object({credits: z.number().optional(), cached: z.boolean().optional(), searchCredits: z.number().optional(), compressionCredits: z.number().optional(), totalCredits: z.number().optional(), savedByCache: z.number().optional()}).optional(), processingTime: z.number().int().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
};

/**
 * Smart context loader
 * 
 * POST /api/context/load
 */
export const createApiApiContextLoad = async (args: CreateApiApiContextLoadArgs, options?: CreateApiApiContextLoadOptions) => {
const {baseUrl = "https://prismer.cloud", 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 = `${baseUrl.replace(/\/+$/, '')}/api/context/load${query.size > 0 ? `?${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(contextLoadResponse, await res.json())
};