// Arcadia storage configs API helpers.
//
// `GET /api/v1/storage_configs` and `POST /api/v1/storage_configs` are the
// only operations with full OpenAPI coverage today. Update/delete and the
// state-transition actions (activate, deactivate, mark-degraded,
// mark-maintenance, set-default, validate) are listed in the spec but their
// operations are still stubbed as `never`, so we hand-roll types and use the
// generic `arcadia.GET<T>` / `arcadia.POST<T>` / etc. — same pattern as
// `tenants.ts`. Switch to `arcadia.typed.*` when the spec gains coverage.

import type { ArcadiaClient } from "@crema/arcadia-core-client"

export type StorageBackend = "s3" | "local" | "gcs"
export type StorageStatus = "active" | "inactive" | "degraded" | "maintenance"

export interface StorageConfig {
  id: string
  tenant_id: string
  name: string
  backend_type: StorageBackend
  status: StorageStatus
  is_default: boolean
  max_file_size_bytes: number | null
  allowed_content_types: string[] | null
  // Backend-specific fields. Secret fields are returned as "***" by the API.
  config: Record<string, unknown>
  inserted_at: string
  updated_at: string
}

export interface StorageConfigInput {
  name: string
  backend_type: StorageBackend
  config: Record<string, unknown>
  is_default?: boolean
  max_file_size_bytes?: number | null
  allowed_content_types?: string[]
}

export interface StorageStats {
  total_objects: number
  total_size_bytes: number
  by_backend: Record<string, unknown>
  by_user: Record<string, unknown>
}

export interface StorageProvidersResponse {
  data: Record<StorageBackend, { required_fields: string[]; optional_fields?: string[] }>
}

export async function listStorageConfigs(arcadia: ArcadiaClient): Promise<StorageConfig[]> {
  const res = await arcadia.GET<{ data: StorageConfig[] }>("/api/v1/storage_configs")
  return res.data
}

export async function getStorageConfig(arcadia: ArcadiaClient, id: string): Promise<StorageConfig> {
  const res = await arcadia.GET<{ data: StorageConfig }>(`/api/v1/storage_configs/${id}`)
  return res.data
}

export async function createStorageConfig(
  arcadia: ArcadiaClient,
  input: StorageConfigInput,
): Promise<StorageConfig> {
  const res = await arcadia.POST<{ data: StorageConfig }>("/api/v1/storage_configs", {
    body: { storage_config: input },
  })
  return res.data
}

export async function updateStorageConfig(
  arcadia: ArcadiaClient,
  id: string,
  input: Partial<StorageConfigInput>,
): Promise<StorageConfig> {
  const res = await arcadia.PATCH<{ data: StorageConfig }>(`/api/v1/storage_configs/${id}`, {
    body: { storage_config: input },
  })
  return res.data
}

export async function deleteStorageConfig(arcadia: ArcadiaClient, id: string): Promise<void> {
  await arcadia.DELETE(`/api/v1/storage_configs/${id}`)
}

export async function activateStorageConfig(arcadia: ArcadiaClient, id: string): Promise<StorageConfig> {
  const res = await arcadia.POST<{ data: StorageConfig }>(`/api/v1/storage_configs/${id}/activate`)
  return res.data
}

export async function deactivateStorageConfig(arcadia: ArcadiaClient, id: string): Promise<StorageConfig> {
  const res = await arcadia.POST<{ data: StorageConfig }>(`/api/v1/storage_configs/${id}/deactivate`)
  return res.data
}

export async function markStorageConfigDegraded(
  arcadia: ArcadiaClient,
  id: string,
): Promise<StorageConfig> {
  const res = await arcadia.POST<{ data: StorageConfig }>(`/api/v1/storage_configs/${id}/mark-degraded`)
  return res.data
}

export async function markStorageConfigMaintenance(
  arcadia: ArcadiaClient,
  id: string,
): Promise<StorageConfig> {
  const res = await arcadia.POST<{ data: StorageConfig }>(
    `/api/v1/storage_configs/${id}/mark-maintenance`,
  )
  return res.data
}

export async function setDefaultStorageConfig(
  arcadia: ArcadiaClient,
  id: string,
): Promise<StorageConfig> {
  const res = await arcadia.POST<{ data: StorageConfig }>(`/api/v1/storage_configs/${id}/set-default`)
  return res.data
}

export interface ValidateResult {
  ok: boolean
  message?: string
  details?: unknown
}

export async function validateStorageConfig(
  arcadia: ArcadiaClient,
  id: string,
): Promise<ValidateResult> {
  return arcadia.POST<ValidateResult>(`/api/v1/storage_configs/${id}/validate`)
}

export async function getStorageStats(arcadia: ArcadiaClient): Promise<StorageStats> {
  const res = await arcadia.GET<{ data: StorageStats }>("/api/v1/storage_configs/stats")
  return res.data
}

// Backend-specific config field schemas. Secret fields appear as "***" on
// reads — the form treats them as write-only and only sends a value when the
// user has typed a fresh one.
export const SECRET_FIELDS: Record<StorageBackend, readonly string[]> = {
  s3: ["secret_access_key"],
  gcs: ["service_account_json"],
  local: [],
}

export const REQUIRED_FIELDS: Record<StorageBackend, readonly string[]> = {
  s3: ["bucket", "region", "access_key_id", "secret_access_key"],
  gcs: ["bucket", "service_account_json"],
  // Local backend's filesystem root. Backend changeset rejects "path" — must
  // be `base_path`. Keep this in sync with `Arcadia.Storage.Adapters.Local`.
  local: ["base_path"],
}

export const OPTIONAL_FIELDS: Record<StorageBackend, readonly string[]> = {
  s3: ["endpoint", "prefix"],
  gcs: ["prefix"],
  local: [],
}

export function isSecretField(backend: StorageBackend, field: string): boolean {
  return SECRET_FIELDS[backend].includes(field)
}

export function isMaskedSecret(value: unknown): boolean {
  return typeof value === "string" && value === "***"
}