import {z} from 'zod'

export type PRCoverageSummaryRequestAttributes = {pr_number: number, repository_url: string};

export type PRCoverageSummaryRequestType = 'ci_app_coverage_pr_summary_request';

export type PRCoverageSummaryRequestData = {attributes: PRCoverageSummaryRequestAttributes, type: PRCoverageSummaryRequestType};

export type PRCoverageSummaryRequest = {data: PRCoverageSummaryRequestData};

export type CreateApiApiV2CodeCoveragePrSummaryArgs = {body: PRCoverageSummaryRequest};

export type CreateApiApiV2CodeCoveragePrSummaryOptions = {baseUrl?: string | undefined, apiKeyAuth?: string | undefined, appKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const coverageSummaryCodeownerStats = z.object({evaluated_flags_count: z.number().int().optional(), evaluated_reports_count: z.number().int().optional(), patch_coverage: z.number().nullable().optional(), total_coverage: z.number().nullable().optional()});

export const coverageSummaryServiceStats = z.object({evaluated_flags_count: z.number().int().optional(), evaluated_reports_count: z.number().int().optional(), patch_coverage: z.number().nullable().optional(), total_coverage: z.number().nullable().optional()});

export const coverageSummaryAttributes = z.object({codeowners: z.record(z.string(), coverageSummaryCodeownerStats).nullable().optional(), evaluated_flags_count: z.number().int().optional(), evaluated_reports_count: z.number().int().optional(), patch_coverage: z.number().nullable().optional(), services: z.record(z.string(), coverageSummaryServiceStats).nullable().optional(), total_coverage: z.number().nullable().optional()});

export const coverageSummaryType = z.literal("ci_app_coverage_summary");

export const coverageSummaryData = z.object({attributes: coverageSummaryAttributes.optional(), id: z.string().optional(), type: coverageSummaryType.optional()});

export const coverageSummaryResponse = z.object({data: coverageSummaryData.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 code coverage summary for a pull request
 * 
 * POST /api/v2/code-coverage/pr/summary
 * 
 * Also accepts auth: AuthZ
 */
export const createApiApiV2CodeCoveragePrSummary = async (args: CreateApiApiV2CodeCoveragePrSummaryArgs, options?: CreateApiApiV2CodeCoveragePrSummaryOptions) => {
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/pr/summary${query.size > 0 ? `?${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(coverageSummaryResponse, await res.json())
};