import {z} from 'zod'

export type RunRetryPolicy = {max_retries: number, retry_delay_seconds: number, use_exponential_backoff: boolean};

export type AppTag = {name: string, value: string};

export type CreateAppParams = {$schema?: string | undefined, is_externally_accessible?: boolean | undefined, max_concurrent_runs?: (number | null) | undefined, name: string, pending_timeout?: (number | null) | undefined, retry_policy?: RunRetryPolicy | undefined, running_timeout?: (number | null) | undefined, short_description?: string | undefined, slug?: string | undefined, subdomain?: (string | null) | undefined, tags?: Array<AppTag> | undefined};

export type CreateApiAppsArgs = {body: CreateAppParams};

export type CreateApiAppsOptions = {baseUrl?: string | undefined, AccessTokenAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const runAttempt = z.object({ended_at: z.string().nullable(), exit_code: z.number().int().nullable(), seq: z.number().int(), started_at: z.string().nullable(), starting_at: z.string().nullable(), status: z.string()});

export const runCreator = z.object({name: z.string(), type: z.enum(["user", "service_account"])});

export const runInitiator = z.object({details: z.union([z.object({schedule_name: z.string().optional()}), z.object({run_app_name: z.string().optional(), run_number: z.number().int().optional()})]), type: z.string().nullable()});

export const runParameter = z.object({hidden: z.boolean().optional(), is_override: z.boolean().nullable().optional(), name: z.string(), value: z.string()});

export const runRetryPolicy = z.object({max_retries: z.number().int(), retry_delay_seconds: z.number().int(), use_exponential_backoff: z.boolean()});

export const run = z.object({$link: z.string(), app_name: z.string(), app_slug: z.string().optional(), app_version: z.string(), attempts: z.array(runAttempt).optional(), cancelled_at: z.string().nullable(), created_at: z.string(), created_by: runCreator.optional(), ended_at: z.string().nullable(), environment: z.string(), exit_code: z.number().int().nullable(), hostname: z.string().optional(), initiator: runInitiator, is_scheduled: z.boolean(), num_attempts: z.number().int(), number: z.number().int(), parameters: z.array(runParameter), pending_timeout: z.number().int().nullable(), retry_policy: runRetryPolicy.optional(), run_id: z.string(), run_size: z.string(), running_timeout: z.number().int().nullable(), scheduled_at: z.string(), started_at: z.string().nullable(), starting_at: z.string().nullable(), status: z.enum(["scheduled", "retrying", "pending", "starting", "running", "crashed", "errored", "exited", "cancelled"]), status_group: z.enum(["successful", "failed", ""]), subdomain: z.string().nullable().optional()});

export const runResults = z.object({cancelled: z.number().int(), crashed: z.number().int(), errored: z.number().int(), exited: z.number().int(), pending: z.number().int(), retrying: z.number().int(), running: z.number().int(), starting: z.number().int()});

export const appTag = z.object({name: z.string(), value: z.string()});

export const app = z.object({created_at: z.string(), health_status: z.enum(["healthy", "warning"]), is_example: z.boolean(), is_externally_accessible: z.boolean(), last_run: run.optional(), max_concurrent_runs: z.number().int(), name: z.string(), next_run_at: z.string().nullable(), owner: z.string(), pending_timeout: z.number().int(), retry_policy: runRetryPolicy.optional(), run_results: runResults.optional(), running_timeout: z.number().int(), schedule: z.string().nullable(), short_description: z.string(), slug: z.string().optional(), status: z.enum(["active", "disabled"]).optional(), subdomain: z.string().optional(), tags: z.array(appTag).optional(), version: z.string().nullable()});

export const createAppResponse = z.object({$schema: z.string().optional(), app: app});

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
};

/**
 * Create app
 * 
 * POST /apps
 * 
 * Also accepts auth: APIKeyAuth
 */
export const createApiApps = async (args: CreateApiAppsArgs, options?: CreateApiAppsOptions) => {
const {baseUrl = "https://api.tower.dev/v1", fetch: fetchFn = fetch, AccessTokenAuth} = options ?? {}

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

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

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