import {z} from 'zod'

export type GetApiPullRequestsOnboardingSignalsArgs = {teamId: string, repositoryIds: Array<string>, limit?: number | undefined};

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

export const pullRequestOnboardingMetricsDto = z.object({hotfixPct: z.number(), bugfixPct: z.number(), securityPct: z.number(), perfPct: z.number(), sensitiveTouchPct: z.number(), medianLines: z.number(), p90Lines: z.number(), mergesPerWeek: z.number(), commentsPerPR: z.number(), qualityPct: z.number(), nitPct: z.number()});

export const pullRequestOnboardingRecommendationDto = z.object({mode: z.string(), reasons: z.array(z.string())});

export const pullRequestOnboardingSignalDto = z.object({repositoryId: z.string(), sampleSize: z.number(), metrics: pullRequestOnboardingMetricsDto, recommendation: pullRequestOnboardingRecommendationDto});

export const pullRequestOnboardingSignalsResponseDto = z.object({statusCode: z.number(), type: z.string(), data: z.array(pullRequestOnboardingSignalDto)});

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 onboarding review signals
 * 
 * GET /pull-requests/onboarding-signals
 */
export const getApiPullRequestsOnboardingSignals = async (args: GetApiPullRequestsOnboardingSignalsArgs, options?: GetApiPullRequestsOnboardingSignalsOptions) => {
const {baseUrl = "http://localhost:3001", fetch: fetchFn = fetch, jwt} = options ?? {}

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

if (args.teamId != null) query.append("teamId", String(args.teamId))
for (const item of args.repositoryIds ?? []) query.append("repositoryIds", String(item))
if (args.limit != null) query.append("limit", String(args.limit))
if (jwt !== undefined) headers.set('authorization', `Bearer ${jwt}`)

const url = `${baseUrl.replace(/\/+$/, '')}/pull-requests/onboarding-signals${query.size > 0 ? `?${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(pullRequestOnboardingSignalsResponseDto, await res.json())
};