import {z} from 'zod'

export type ResourceView = 'basic' | 'full';

export type GetApiConnectionsArgs = {page_size?: number | undefined, page_token?: string | undefined, view?: ResourceView | undefined};

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

export const resourceId = z.string();

export const recordSchema = z.array(z.object({name: z.string().optional(), type: z.string().optional()}));

export const physicalField = z.object({kind: z.literal("physical"), name: z.string().optional(), type: z.string().optional()});

export const computedField = z.object({kind: z.literal("computed"), name: z.string().optional(), expression: z.string().optional()});

export const metadataField = z.object({kind: z.literal("metadata"), name: z.string().optional(), type: z.string().optional(), key: z.string().optional()});

export const schemaV2 = z.object({fields: z.array(z.discriminatedUnion("kind", [physicalField, computedField, metadataField])).optional(), watermarks: z.array(z.object({name: z.string().optional(), expression: z.string().optional()})).optional(), constraints: z.object({primary_key: z.array(z.string()).optional()}).optional()});

export const autoscaleConfiguration = z.object({pause_conditions: z.record(z.string(), z.string().nullable()).nullable().optional(), resume_conditions: z.record(z.string(), z.string().nullable()).nullable().optional()}).nullable();

export const runtimeError = z.object({message: z.string().optional(), raw_exception: z.string().optional(), timestamp: z.string().optional()});

export const requestedTasks = z.number().int();

export const actualTasks = z.number().int();

export const requestedTaskSize = z.string().nullable();

export const actualTaskSize = z.string().nullable();

export const connection = z.union([z.object({id: resourceId.optional(), name: z.string().optional(), description: z.string().optional(), connector: z.enum(["astra-streaming", "clickhouse", "confluent-cloud", "datadog", "datagen", "delta-lake", "druid", "dynamodb-cdc", "elasticsearch", "gcp-pubsub", "hudi", "influxdb", "kafka", "kinesis", "mongodb", "mongodb-cdc", "ms-sql", "mysql-cdc", "oracle", "oracle-cdc", "pinot", "polaris", "postgres", "postgres-cdc", "pulsar", "redis", "redpanda", "redshift", "rest", "rockset", "s3", "s3-lambda", "s3-v2", "singlestore-db", "snowflake", "startree", "streamnative", "timescale"]).optional(), type: z.enum(["source", "sink"]).optional(), stream_mappings: z.array(z.object({stream_id: resourceId.optional(), external_resource_specifier: z.unknown()})).optional(), stream_id: resourceId.optional(), schema: recordSchema, schema_v2: schemaV2.optional(), properties: z.record(z.string(), z.string().nullable()).optional(), autoscale_configuration: autoscaleConfiguration.optional(), last_runtime_error: runtimeError.optional(), last_activated_time: z.string().optional(), target_state: z.enum(["RUNNING", "STOPPED"]).optional(), actual_state: z.enum(["UNKNOWN", "STARTING", "RUNNING", "FAILED", "FINISHED", "STOPPED", "PAUSING", "PAUSED"]).optional(), requested_tasks: requestedTasks.optional(), actual_tasks: actualTasks.optional(), requested_task_size: requestedTaskSize.optional(), actual_task_size: actualTaskSize.optional(), create_time: z.string().optional(), update_time: z.string().optional()}).and(z.record(z.string(), z.string().nullable())).nullable(), z.object({id: resourceId.optional(), name: z.string().optional(), description: z.string().optional(), connector: z.enum(["astra-streaming", "clickhouse", "confluent-cloud", "datadog", "datagen", "delta-lake", "druid", "dynamodb-cdc", "elasticsearch", "gcp-pubsub", "hudi", "influxdb", "kafka", "kinesis", "mongodb", "mongodb-cdc", "ms-sql", "mysql-cdc", "oracle", "oracle-cdc", "pinot", "polaris", "postgres", "postgres-cdc", "pulsar", "redis", "redpanda", "redshift", "rest", "rockset", "s3", "s3-lambda", "s3-v2", "singlestore-db", "snowflake", "startree", "streamnative", "timescale"]).optional(), type: z.enum(["source", "sink"]).optional(), stream_mappings: z.array(z.object({stream_id: resourceId.optional(), external_resource_specifier: z.unknown()})).optional(), stream_id: resourceId.optional(), schema: recordSchema.optional(), schema_v2: schemaV2, properties: z.record(z.string(), z.string().nullable()).optional(), autoscale_configuration: autoscaleConfiguration.optional(), last_runtime_error: runtimeError.optional(), last_activated_time: z.string().optional(), target_state: z.enum(["RUNNING", "STOPPED"]).optional(), actual_state: z.enum(["UNKNOWN", "STARTING", "RUNNING", "FAILED", "FINISHED", "STOPPED", "PAUSING", "PAUSED"]).optional(), requested_tasks: requestedTasks.optional(), actual_tasks: actualTasks.optional(), requested_task_size: requestedTaskSize.optional(), actual_task_size: actualTaskSize.optional(), create_time: z.string().optional(), update_time: z.string().optional()}).and(z.record(z.string(), z.string().nullable())).nullable()]);

export const getApiConnectionsResponse = z.object({next_page_token: z.string().optional(), items: z.array(connection)});

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 list of connections.
 * 
 * GET /connections
 * 
 * Also accepts auth: oauth2
 */
export const getApiConnections = async (args: GetApiConnectionsArgs, options?: GetApiConnectionsOptions) => {
const {baseUrl = "https://replace-with-account.api.decodable.co/v1alpha2", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (args.page_size != null) query.append("page_size", String(args.page_size))
if (args.page_token != null) query.append("page_token", String(args.page_token))
if (args.view != null) query.append("view", String(args.view))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

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