import {z} from 'zod'

export type GetApiReposRepoIdMergesMergeIdOptions = {baseUrl?: string | undefined, OAuth2?: string | undefined, fetch?: typeof fetch | undefined};

export const tier = z.enum(["EDUCATION", "INDIE", "PROFESSIONAL", "ENTERPRISE", "UNKNOWN"]);

export const user = z.object({image: z.string().max(524288).optional(), email: z.string().optional(), full_name: z.string().optional(), id: z.string(), name: z.string().optional(), tier: tier.optional()});

export const fileMode = z.union([z.literal(16877), z.literal(33188), z.literal(33261), z.literal(40960)]);

export const objectStatus = z.union([z.literal(1), z.literal(2), z.literal(3), z.literal(4)]);

export const conflictIndex = z.object({conflict_index_id: z.enum(["RESULT", "BASE", "OTHER"]), file_mode: fileMode, path: z.string(), prev_path: z.string().optional(), type: objectStatus});

export const conflict = z.object({conflict_id: z.string(), is_resolved: z.boolean(), base: conflictIndex, other: conflictIndex, result: conflictIndex.optional()});

export const detailedMerge = z.object({id: z.string(), repo_id: z.string(), user: user, base_ref: z.string(), base_commit: z.string(), other_ref: z.string(), other_commit: z.string(), ancestor_commit: z.string(), conflicts: z.array(conflict)});

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
};

/**
 * Details of a specific merge in progress
 * 
 * GET /repos/{repo_id}/merges/{merge_id}
 * 
 * Also accepts auth: OAuth2
 */
export const getApiReposRepoIdMergesMergeId = async (options?: GetApiReposRepoIdMergesMergeIdOptions) => {
const {baseUrl = "https://api.diversion.dev/v0", fetch: fetchFn = fetch, OAuth2} = options ?? {}

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

if (OAuth2 !== undefined) headers.set('authorization', `Bearer ${OAuth2}`)

const url = `${baseUrl.replace(/\/+$/, '')}/repos/${encodeURIComponent(String(args.repo_id))}/merges/${encodeURIComponent(String(args.merge_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(detailedMerge, await res.json())
};