import { writable } from 'svelte/store';
import { invoke } from '@tauri-apps/api/core';

export interface AppSettings {
  ai_provider: string;
  openai_api_key: string;
  anthropic_api_key: string;
  openai_model: string;
  anthropic_model: string;
  litellm_model: string;
  litellm_api_key: string;
  litellm_api_base: string;
  ollama_url: string;
  ollama_model: string;
  transcription_model: string;
  transcription_device: string;
  transcription_language: string;
  skip_diarization: boolean;
  hf_token: string;
  num_speakers: number | null;
  devtools_enabled: boolean;
}

const defaults: AppSettings = {
  ai_provider: 'local',
  openai_api_key: '',
  anthropic_api_key: '',
  openai_model: 'gpt-4o-mini',
  anthropic_model: 'claude-sonnet-4-6',
  litellm_model: 'gpt-4o-mini',
  litellm_api_key: '',
  litellm_api_base: '',
  ollama_url: 'http://localhost:11434',
  ollama_model: 'llama3.2',
  transcription_model: 'base',
  transcription_device: 'cpu',
  transcription_language: '',
  skip_diarization: false,
  hf_token: '',
  num_speakers: null,
  devtools_enabled: false,
};

export const settings = writable<AppSettings>({ ...defaults });

export async function loadSettings(): Promise<void> {
  try {
    const saved = await invoke<Record<string, unknown>>('load_settings');
    settings.update(s => ({ ...s, ...saved } as AppSettings));
  } catch {
    // Use defaults if settings can't be loaded
  }
}

export async function configureAIProvider(s: AppSettings): Promise<void> {
  const configMap: Record<string, Record<string, string>> = {
    openai: { api_key: s.openai_api_key, model: s.openai_model },
    anthropic: { api_key: s.anthropic_api_key, model: s.anthropic_model },
    litellm: { api_key: s.litellm_api_key, api_base: s.litellm_api_base, model: s.litellm_model },
    local: { model: s.ollama_model, base_url: s.ollama_url + '/v1' },
  };
  const config = configMap[s.ai_provider];
  if (config) {
    try {
      await invoke('ai_configure', { provider: s.ai_provider, config });
    } catch {
      // Sidecar may not be running yet
    }
  }
}

export async function saveSettings(s: AppSettings): Promise<void> {
  settings.set(s);
  await invoke('save_settings', { settings: s });

  // Configure the AI provider in the Python sidecar
  await configureAIProvider(s);
}