import {z} from 'zod'

export type GetApiApiOrgIdOncallTeamsTeamIdPolicyArgs = {org_id: string, team_id: string};

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

export const l0Mode = z.enum(["parallel", "gate", "only", "off"]);

export const l0Modes = z.object({P1: l0Mode, P2: l0Mode, P3: l0Mode, P4: l0Mode});

export const l0Policy = z.object({allow_downgrade: z.boolean(), allow_promotion: z.boolean(), allow_suppress: z.boolean(), max_promotion_steps: z.number().int().gte(0), mode: l0Modes, triage_budget_seconds: z.number().int()});

export const channel = z.enum(["email", "webhook", "sms", "voice", "slack"]);

export const rotationMode = z.enum(["on_call", "all"]);

export const escalationTarget = z.union([z.object({kind: z.literal("rotation"), mode: rotationMode.optional(), rotation_id: z.string()}), z.object({email: z.string(), kind: z.literal("user")}), z.object({kind: z.literal("whole_team")})]);

export const ladderStep = z.object({after_micros: z.number().int(), targets: z.array(escalationTarget)});

export const priorityRung = z.object({channels: z.array(channel), priority: z.number().int().gte(0), steps: z.array(ladderStep)});

export const policyView = z.object({destinations: z.array(z.string()).optional(), id: z.string(), l0: l0Policy.optional(), org_id: z.string(), rungs: z.array(priorityRung), team_id: z.string(), template: z.string().nullable().optional(), ladder_is_generated: z.boolean()});

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 a team's escalation policy
 * 
 * GET /api/{org_id}/oncall/teams/{team_id}/policy
 */
export const getApiApiOrgIdOncallTeamsTeamIdPolicy = async (args: GetApiApiOrgIdOncallTeamsTeamIdPolicyArgs, options: GetApiApiOrgIdOncallTeamsTeamIdPolicyOptions) => {
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/${encodeURIComponent(String(args.org_id))}/oncall/teams/${encodeURIComponent(String(args.team_id))}/policy${query.size > 0 ? `?${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(policyView, await res.json())
};