import {z} from 'zod'

export type FilesCoverageRequestAttributes = {branch?: string | undefined, changed_only?: boolean | undefined, codeowner?: string | undefined, commit_sha?: string | undefined, flag?: string | undefined, pr_number?: number | undefined, repository_id?: string | undefined, repository_url?: string | undefined, service?: string | undefined};

export type FilesCoverageRequestType = 'ci_app_coverage_files_request';

export type FilesCoverageRequestData = {attributes: FilesCoverageRequestAttributes, type: FilesCoverageRequestType};

export type FilesCoverageRequest = {data: FilesCoverageRequestData};

export type CreateApiApiV2CodeCoverageFilesArgs = {body: FilesCoverageRequest};

export type CreateApiApiV2CodeCoverageFilesOptions = {baseUrl?: string | undefined, apiKeyAuth?: string | undefined, appKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const fileCoverageLines = z.object({added_lines: z.array(z.number().int()).optional(), covered_lines: z.array(z.number().int()).optional(), executable_lines: z.array(z.number().int()).optional()});

export const filesCoverageAttributes = z.object({base_commit_sha: z.string().optional(), event_timestamp: z.number().int().optional(), files: z.record(z.string(), fileCoverageLines).optional(), head_commit_sha: z.string().optional(), report_count: z.number().int().optional()});

export const filesCoverageResponseType = z.literal("ci_app_coverage_files");

export const filesCoverageData = z.object({attributes: filesCoverageAttributes.optional(), id: z.string().optional(), type: filesCoverageResponseType.optional()});

export const filesCoverageResponse = z.object({data: filesCoverageData.optional()});

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 per-file code coverage data
 * 
 * POST /api/v2/code-coverage/files
 * 
 * Also accepts auth: AuthZ
 */
export const createApiApiV2CodeCoverageFiles = async (args: CreateApiApiV2CodeCoverageFilesArgs, options?: CreateApiApiV2CodeCoverageFilesOptions) => {
const {baseUrl = "https://api.datadoghq.com", fetch: fetchFn = fetch, apiKeyAuth, appKeyAuth} = options ?? {}

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

if (apiKeyAuth !== undefined) headers.set("DD-API-KEY", apiKeyAuth)
if (appKeyAuth !== undefined) headers.set("DD-APPLICATION-KEY", appKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v2/code-coverage/files${query.size > 0 ? `?${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(filesCoverageResponse, await res.json())
};