import {z} from 'zod'

export type GetApiApiReposNamespaceRepositoryIssuesIndexArgs = {namespace: string, repository: string, index: number};

export type GetApiApiReposNamespaceRepositoryIssuesIndexOptions = {baseUrl: string, cookieAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const reactionGroup = z.object({count: z.number().int(), emoji: z.string(), reacted: z.boolean()});

export const commentResponse = z.object({author_id: z.string(), author_username: z.string(), body: z.string(), edited_at: z.string().nullable().optional(), id: z.string(), reactions: z.array(reactionGroup)});

export const milestoneBrief = z.object({closed: z.boolean(), due_date: z.string().nullable().optional(), id: z.string(), title: z.string()});

export const issueStatus = z.enum(["open", "in_progress", "completed", "not_planned"]);

export const issueResponse = z.object({assignee_ids: z.array(z.string()), assignees: z.array(z.string()), author_id: z.string(), author_username: z.string(), body: z.string(), comment_count: z.number().int(), git_bug_id: z.string(), id: z.string(), index: z.number().int(), labels: z.array(z.string()), milestone: milestoneBrief.nullable().optional(), priority: z.string(), reactions: z.array(reactionGroup), status: issueStatus, title: z.string(), updated_at: z.string()});

export const issueDetailResponse = z.object({comments: z.array(commentResponse), issue: issueResponse});

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 Issue
 * 
 * GET /api/repos/{namespace}/{repository}/issues/{index}
 */
export const getApiApiReposNamespaceRepositoryIssuesIndex = async (args: GetApiApiReposNamespaceRepositoryIssuesIndexArgs, options: GetApiApiReposNamespaceRepositoryIssuesIndexOptions) => {
const {baseUrl, fetch: fetchFn = fetch, cookieAuth} = options ?? {}

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

if (cookieAuth !== undefined) cookies.push("gitarena-session=" + encodeURIComponent(cookieAuth))

const url = `${baseUrl.replace(/\/+$/, '')}/api/repos/${encodeURIComponent(String(args.namespace))}/${encodeURIComponent(String(args.repository))}/issues/${encodeURIComponent(String(args.index))}${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(issueDetailResponse, await res.json())
};