import {z} from 'zod'

export type MergeRequestCreateRequest = {branchFromId: number, branchIntoId: number, title: string, description?: (string | null) | undefined, externalId?: (string | null) | undefined, autoMergeStrategy?: ('immediately' | 'scheduled' | 'none' | null) | undefined, autoMergeAt?: (string | null) | undefined, reviewerIds?: Array<number> | undefined};

export type CreateApiV2StorageMergeRequestArgs = {body: MergeRequestCreateRequest};

export type CreateApiV2StorageMergeRequestOptions = {baseUrl?: string | undefined, StorageKey?: string | undefined, fetch?: typeof fetch | undefined};

export const mergeRequestResponse = z.object({id: z.number().int(), creator: z.object({id: z.number().int(), name: z.string()}), title: z.string(), description: z.string(), state: z.enum(["development", "in_review", "approved", "in_merge", "published", "canceled"]), branches: z.object({branchFromId: z.number().int().nullable(), branchIntoId: z.number().int().nullable()}), merge: z.object({mergedAt: z.string().nullable(), mergerId: z.number().int().nullable(), mergerName: z.string()}), createdAt: z.string(), externalId: z.string(), autoMergeStrategy: z.enum(["immediately", "scheduled", "none"]), autoMergeAt: z.string().nullable(), approvals: z.array(z.object({approverId: z.string(), approverName: z.string(), createdAt: z.string()})), reviewers: z.array(z.object({id: z.number().int(), name: z.string(), email: z.string(), status: z.enum(["approved", "rejected"]).nullable()}))});

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
};

/**
 * Create a merge request
 * 
 * POST /v2/storage/merge-request
 * 
 * Also accepts auth: ManageKey, BearerAuth
 */
export const createApiV2StorageMergeRequest = async (args: CreateApiV2StorageMergeRequestArgs, options?: CreateApiV2StorageMergeRequestOptions) => {
const {baseUrl = "https://connection.keboola.com", fetch: fetchFn = fetch, StorageKey} = options ?? {}

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

if (StorageKey !== undefined) headers.set("X-StorageApi-Token", StorageKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v2/storage/merge-request${query.size > 0 ? `?${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(mergeRequestResponse, await res.json())
};