import {z} from 'zod'

export type ReleasePair = {old: string, new: string};

export type DiffReleasesRequest = {account: number, borders: {[key: string]: Array<ReleasePair>}};

export type CreateApiDiffReleasesArgs = {body: DiffReleasesRequest};

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

export const includedNativeUser = z.object({avatar: z.string()});

export const linkedJIRAIssue = z.object({id: z.string(), title: z.string(), epic: z.string().optional(), labels: z.array(z.string()).optional(), type: z.string()});

export const developerID = z.string();

export const releasedPullRequest = z.object({additions: z.number().int(), author: z.union([developerID, z.string().nullable()]), created: z.string(), deletions: z.number().int(), jira: z.array(z.string()).optional(), number: z.number().int(), title: z.string()});

export const filteredRelease = z.object({added_lines: z.number().int().gte(0), age: z.string(), commits: z.number().int().gte(0), commit_authors: z.array(developerID), deleted_lines: z.number().int().gte(0), deployments: z.array(z.string()).optional(), name: z.string(), prs: z.array(releasedPullRequest), published: z.string(), publisher: z.string().nullable(), repository: z.string(), sha: z.string().min(40).max(40), url: z.string()});

export const releaseDiff = z.object({old: z.string(), new: z.string(), releases: z.array(filteredRelease)});

export const diffedReleases = z.object({include: z.object({users: z.record(z.string(), includedNativeUser), jira: z.record(z.string(), linkedJIRAIssue).optional()}), data: z.record(z.string(), z.array(releaseDiff))});

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
};

/**
 * Find releases between the two given ones per repository.
 * 
 * POST /diff/releases
 * 
 * Also accepts auth: apiKeyAuth
 */
export const createApiDiffReleases = async (args: CreateApiDiffReleasesArgs, options: CreateApiDiffReleasesOptions) => {
const {baseUrl, fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

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

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