import { invoke } from '@tauri-apps/api/core'

// Types
export interface SessionInfo {
    pid: number;
    port: number;
    model_id: string;
    model_path: string;
    api_key: string;
    mmproj_path?: string;
}

export interface UnloadResult {
    success: boolean;
    error?: string;
}

export interface DeviceInfo {
  id: string
  name: string
  memory: number
}

export interface GgufMetadata {
  version: number
  tensor_count: number
  metadata: Record<string, string>
}

// Cleanup commands
export async function cleanupLlamaProcesses(): Promise<void> {
  return await invoke('plugin:llamacpp|cleanup_llama_processes')
}

// LlamaCpp server commands
export async function loadLlamaModel(
  backendPath: string,
  args: string[],
  envs: Record<string, string>
): Promise<SessionInfo> {
  return await invoke('plugin:llamacpp|load_llama_model', {
    backendPath,
    args,
    envs
  })
}

export async function unloadLlamaModel(pid: number): Promise<UnloadResult> {
  return await invoke('plugin:llamacpp|unload_llama_model', { pid })
}

export async function getDevices(
  backendPath: string,
  libraryPath?: string
): Promise<DeviceInfo[]> {
  return await invoke('plugin:llamacpp|get_devices', {
    backendPath,
    libraryPath,
  })
}

export async function generateApiKey(
  modelId: string,
  apiSecret: string
): Promise<string> {
  return await invoke('plugin:llamacpp|generate_api_key', {
    modelId,
    apiSecret,
  })
}

export async function isProcessRunning(pid: number): Promise<boolean> {
  return await invoke('plugin:llamacpp|is_process_running', { pid })
}

export async function getRandomPort(): Promise<number> {
  return await invoke('plugin:llamacpp|get_random_port')
}

export async function findSessionByModel(
  modelId: string
): Promise<SessionInfo | null> {
  return await invoke('plugin:llamacpp|find_session_by_model', { modelId })
}

export async function getLoadedModels(): Promise<string[]> {
  return await invoke('plugin:llamacpp|get_loaded_models')
}

export async function getAllSessions(): Promise<SessionInfo[]> {
  return await invoke('plugin:llamacpp|get_all_sessions')
}

export async function getSessionByModel(
  modelId: string
): Promise<SessionInfo | null> {
  return await invoke('plugin:llamacpp|get_session_by_model', { modelId })
}

// GGUF commands
export async function readGgufMetadata(path: string): Promise<GgufMetadata> {
  return await invoke('plugin:llamacpp|read_gguf_metadata', { path })
}

export async function estimateKVCacheSize(
  meta: Record<string, string>,
  ctxSize?: number
): Promise<{ size: number; per_token_size: number }> {
  return await invoke('plugin:llamacpp|estimate_kv_cache_size', {
    meta,
    ctxSize,
  })
}

export async function getModelSize(path: string): Promise<number> {
  return await invoke('plugin:llamacpp|get_model_size', { path })
}

export async function isModelSupported(
  path: string,
  ctxSize?: number
): Promise<'RED' | 'YELLOW' | 'GREEN'> {
  return await invoke('plugin:llamacpp|is_model_supported', {
    path,
    ctxSize,
  })
}

export async function planModelLoadInternal(
  path: string,
  memoryMode: string,
  mmprojPath?: string,
  requestedContext?: number
): Promise<{
  gpuLayers: number
  maxContextLength: number
  noOffloadKVCache: boolean
  offloadMmproj?: boolean
  batchSize: number
  mode: 'GPU' | 'Hybrid' | 'CPU' | 'Unsupported'
}> {
  return await invoke('plugin:llamacpp|plan_model_load', {
    path,
    memoryMode,
    mmprojPath,
    requestedContext,
  })
}