import {z} from 'zod'

export type JIRAComment = {author: string, created: string, rendered_body: string};

export type JIRAEpicChild = {id: string, title: string, created: string, updated: string, work_began?: string | undefined, resolved?: string | undefined, acknowledge_time: string, lead_time?: string | undefined, life_time: string, reporter: string, assignee?: string | undefined, comments: number, comment_list?: Array<JIRAComment> | undefined, priority: string | null, rendered_description?: string | undefined, status: string, story_points?: number | undefined, type: string, url: string, subtasks: number, prs: number};

export type JIRAEpic = {id: string, title: string, created: string, updated: string, work_began?: string | undefined, resolved?: string | undefined, acknowledge_time: string, lead_time?: string | undefined, life_time: string, reporter: string, assignee?: string | undefined, comments: number, comment_list?: Array<JIRAComment> | undefined, priority: string | null, rendered_description?: string | undefined, status: string, story_points?: number | undefined, type: string, url: string, project: string, children?: Array<JIRAEpicChild> | undefined, prs: number};

export type JIRAFilterWith = {assignees?: (Array<string | null>) | undefined, reporters?: Array<string> | undefined, commenters?: Array<string> | undefined};

export type JIRAMetricID = 'jira-open' | 'jira-resolved' | 'jira-raised' | 'jira-acknowledged' | 'jira-acknowledged-q' | 'jira-life-time' | 'jira-life-time-below-threshold-ratio' | 'jira-lead-time' | 'jira-lead-time-below-threshold-ratio' | 'jira-acknowledge-time' | 'jira-acknowledge-time-below-threshold-ratio' | 'jira-pr-lag-time' | 'jira-backlog-time' | 'jira-resolution-rate';

export type TimeDuration = string;

export type JIRAHistogramDefinition = {metric: JIRAMetricID, scale?: ('linear' | 'log') | undefined, bins?: number | undefined, ticks?: (Array<number | TimeDuration>) | undefined};

export type TimeZone = number;

export type Quantiles = Array<number>;

export type JIRAHistogramsRequest = {priorities?: Array<string> | undefined, types?: Array<string> | undefined, epics?: Array<JIRAEpic> | undefined, labels_include?: Array<string> | undefined, labels_exclude?: Array<string> | undefined, with?: Array<JIRAFilterWith> | undefined, projects?: Array<string> | undefined, histograms: Array<JIRAHistogramDefinition>, date_from: string, date_to: string, timezone?: TimeZone | undefined, exclude_inactive: boolean, quantiles?: Quantiles | undefined, account: number};

export type CreateApiHistogramsJiraArgs = {body: JIRAHistogramsRequest};

export type CreateApiHistogramsJiraOptions = {baseUrl: string, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const jIRAFilterWith = z.object({assignees: z.array(z.string().nullable()).optional(), reporters: z.array(z.string()).optional(), commenters: z.array(z.string()).optional()});

export const jIRAMetricID = z.enum(["jira-open", "jira-resolved", "jira-raised", "jira-acknowledged", "jira-acknowledged-q", "jira-life-time", "jira-life-time-below-threshold-ratio", "jira-lead-time", "jira-lead-time-below-threshold-ratio", "jira-acknowledge-time", "jira-acknowledge-time-below-threshold-ratio", "jira-pr-lag-time", "jira-backlog-time", "jira-resolution-rate"]);

export const histogramScale = z.enum(["linear", "log"]);

export const timeDuration = z.string();

export const interquartile = z.object({left: z.union([z.number(), timeDuration]), right: z.union([z.number(), timeDuration])});

export const calculatedJIRAHistogram = z.object({with: jIRAFilterWith.optional(), metric: jIRAMetricID, scale: histogramScale, ticks: z.array(z.union([z.number(), timeDuration])), frequencies: z.array(z.number().int().gte(0)), interquartile: interquartile});

export const calculatedJIRAHistograms = z.array(calculatedJIRAHistogram);

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
};

/**
 * Calculate histograms over JIRA issue activities.
 * 
 * POST /histograms/jira
 * 
 * Also accepts auth: apiKeyAuth
 */
export const createApiHistogramsJira = async (args: CreateApiHistogramsJiraArgs, options: CreateApiHistogramsJiraOptions) => {
const {baseUrl, fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/histograms/jira${query.size > 0 ? `?${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(calculatedJIRAHistograms, await res.json())
};