import {z} from 'zod'

export type GetApiServiceOwnerUsernameReposRepoNameCompareArgs = {base?: string | undefined, head?: string | undefined, owner_username: string, pullid?: number | undefined, repo_name: string, service: 'bitbucket' | 'bitbucket_server' | 'github' | 'github_enterprise' | 'gitlab' | 'gitlab_enterprise'};

export type GetApiServiceOwnerUsernameReposRepoNameCompareOptions = {baseUrl?: string | undefined, tokenAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const reportTotals = z.object({files: z.number().int(), lines: z.number().int(), hits: z.number().int(), misses: z.number().int(), partials: z.number().int(), coverage: z.number(), branches: z.number().int(), methods: z.number().int(), messages: z.number().int(), sessions: z.number().int(), complexity: z.number(), complexity_total: z.number(), complexity_ratio: z.number(), diff: z.unknown()});

export const totalsComparison = z.object({base: reportTotals, head: reportTotals, patch: reportTotals});

export const serviceEnum = z.enum(["github", "gitlab", "bitbucket", "github_enterprise", "gitlab_enterprise", "bitbucket_server"]);

export const owner = z.object({service: serviceEnum, username: z.string().nullable(), name: z.string().nullable()});

export const commitTotals = z.object({files: z.number().int(), lines: z.number().int(), hits: z.number().int(), misses: z.number().int(), partials: z.number().int(), coverage: z.number(), branches: z.number().int(), methods: z.number().int(), sessions: z.number().int(), complexity: z.number(), complexity_total: z.number(), complexity_ratio: z.number(), diff: z.number().int()});

export const stateB73Enum = z.enum(["complete", "pending", "error", "skipped"]);

export const commit = z.object({commitid: z.string(), message: z.string(), timestamp: z.string(), ci_passed: z.boolean(), author: owner, branch: z.string(), totals: commitTotals, state: stateB73Enum, parent: z.string()});

export const comparison = z.object({base_commit: z.string(), head_commit: z.string(), totals: totalsComparison, commit_uploads: z.array(commit), diff: z.record(z.string(), z.unknown()), files: z.array(z.record(z.string(), z.unknown())), untracked: z.array(z.string())});

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
};

/**
 * Comparison
 * 
 * GET /{service}/{owner_username}/repos/{repo_name}/compare/
 */
export const getApiServiceOwnerUsernameReposRepoNameCompare = async (args: GetApiServiceOwnerUsernameReposRepoNameCompareArgs, options?: GetApiServiceOwnerUsernameReposRepoNameCompareOptions) => {
const {baseUrl = "https://api.codecov.io/api/v2", fetch: fetchFn = fetch, tokenAuth} = options ?? {}

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

if (args.base != null) query.append("base", String(args.base))
if (args.head != null) query.append("head", String(args.head))
if (args.pullid != null) query.append("pullid", String(args.pullid))
if (tokenAuth !== undefined) headers.set('authorization', `Bearer ${tokenAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/${encodeURIComponent(String(args.service))}/${encodeURIComponent(String(args.owner_username))}/repos/${encodeURIComponent(String(args.repo_name))}/compare/${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(comparison, await res.json())
};