import {z} from 'zod'

export type GetApiApiOrgIdSlosSloIdArgs = {org_id: string, slo_id: string};

export type GetApiApiOrgIdSlosSloIdOptions = {baseUrl: string, Authorization?: string | undefined, fetch?: typeof fetch | undefined};

export const countQuery = z.object({sql: z.string(), stream: z.string(), stream_type: z.string()});

export const countSource = z.union([z.object({mode: z.literal("single_query"), query: z.object({good_expr: z.string(), scope: z.string().nullable().optional(), stream: z.string(), stream_type: z.string()})}), z.object({mode: z.literal("dual_query"), query: z.object({good: countQuery, total: countQuery})}), z.object({mode: z.literal("prom_ql"), query: z.object({good: z.string(), total: z.string()})})]);

export const downtimeStatus = z.enum(["scheduled", "active", "ended", "cancelled", "ended_early"]);

export const correctionRef = z.object({applies: z.boolean().optional(), downtime_id: z.string(), name: z.string(), status: downtimeStatus});

export const sloStatusView = z.object({burn_rate: z.number().nullable().optional(), computed_at: z.number().int().nullable().optional(), corrections: z.array(correctionRef).optional(), coverage: z.number(), covered_slices: z.number().int(), error_budget_remaining: z.number().nullable().optional(), good: z.number(), group_key: z.string(), measuring_since: z.number().int().nullable().optional(), no_data: z.boolean(), sli: z.number().nullable().optional(), stale_watermark: z.boolean().optional(), time_to_exhaust_secs: z.number().int().nullable().optional(), total: z.number(), watermark_end: z.number().int().nullable().optional()});

export const operator = z.enum(["=", "!=", ">", ">=", "<", "<=", "contains", "not_contains", "is_null", "is_not_null", "is_empty", "is_not_empty"]);

export const queryLanguage = z.enum(["sql", "prom_ql"]);

export const sloListItem = z.union([z.object({config: z.object({source: countSource}), sli_type: z.literal("count"), group_by: z.array(z.string()).nullable().optional(), slice_interval_secs: z.number().int(), window_secs: z.number().int(), definition_generation: z.number().int().optional(), description: z.string().optional(), enabled: z.boolean().optional(), folder_id: z.string().optional(), groups_estimate: z.number().int().nullable().optional(), groups_reserved: z.number().int().optional(), id: z.string().optional(), name: z.string(), org: z.string().optional(), owner: z.string().nullable().optional(), tags: z.array(z.string()).optional(), target: z.number(), status: sloStatusView.nullable().optional()}), z.object({config: z.object({absent_is_bad: z.boolean().optional(), comparator: operator, query: z.string(), query_language: queryLanguage, scope: z.string().nullable().optional(), stream: z.string(), stream_type: z.string(), threshold: z.number()}), sli_type: z.literal("time_slice"), group_by: z.array(z.string()).nullable().optional(), slice_interval_secs: z.number().int(), window_secs: z.number().int(), definition_generation: z.number().int().optional(), description: z.string().optional(), enabled: z.boolean().optional(), folder_id: z.string().optional(), groups_estimate: z.number().int().nullable().optional(), groups_reserved: z.number().int().optional(), id: z.string().optional(), name: z.string(), org: z.string().optional(), owner: z.string().nullable().optional(), tags: z.array(z.string()).optional(), target: z.number(), status: sloStatusView.nullable().optional()}), z.object({config: z.object({alert_id: z.string()}), sli_type: z.literal("alert"), group_by: z.array(z.string()).nullable().optional(), slice_interval_secs: z.number().int(), window_secs: z.number().int(), definition_generation: z.number().int().optional(), description: z.string().optional(), enabled: z.boolean().optional(), folder_id: z.string().optional(), groups_estimate: z.number().int().nullable().optional(), groups_reserved: z.number().int().optional(), id: z.string().optional(), name: z.string(), org: z.string().optional(), owner: z.string().nullable().optional(), tags: z.array(z.string()).optional(), target: z.number(), status: sloStatusView.nullable().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 an SLO
 * 
 * GET /api/{org_id}/slos/{slo_id}
 */
export const getApiApiOrgIdSlosSloId = async (args: GetApiApiOrgIdSlosSloIdArgs, options: GetApiApiOrgIdSlosSloIdOptions) => {
const {baseUrl, fetch: fetchFn = fetch, Authorization} = options ?? {}

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

if (Authorization !== undefined) headers.set("Authorization", Authorization)

const url = `${baseUrl.replace(/\/+$/, '')}/api/${encodeURIComponent(String(args.org_id))}/slos/${encodeURIComponent(String(args.slo_id))}${query.size > 0 ? `?${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(sloListItem, await res.json())
};