import { Plugin, WorkspaceLeaf, App, Setting, Notice, PluginSettingTab } from 'obsidian';
import { ChatView } from './src/chat-view';
import { PluginSettings } from './src/types';
import {
  isValidHttpUrl,
  validatePluginSettings,
  validateOllamaUrl,
  validateModelName,
  Logger,
} from './src/utils';

export default class OllamaPlugin extends Plugin {
  settings: PluginSettings = {
    ollamaUrl: 'http://localhost:11434',
    model: 'llama3',
    lastIndexTime: 0,
  };

  async onload() {
    // Initialize logging
    Logger.info('Ollama Plugin loading...', 'plugin');

    await this.loadSettings();
    Logger.info('Plugin loaded successfully', 'plugin');

    this.registerView(
      'ollama-chat-view',
      (leaf: WorkspaceLeaf) => new ChatView(leaf, this.settings)
    );

    this.addRibbonIcon('message-square', 'Ollama Chat', async () => {
      const leaf = this.app.workspace.getLeaf();
      await leaf.setViewState({
        type: 'ollama-chat-view',
        active: true,
      });
      this.app.workspace.revealLeaf(leaf);
    });

    this.addSettingTab(new OllamaSettingTab(this.app, this));
  }

  async loadSettings() {
    try {
      const data = await this.loadData();
      if (data) {
        Logger.debug('Loading saved settings', 'settings');
        this.settings = Object.assign({}, this.settings, data);
      }
    } catch (error) {
      // Use centralized error handling
      const { ErrorHandler } = await import('./src/error-handler');
      ErrorHandler.handleError(error, 'settings load');
    }
  }

  async saveSettings() {
    try {
      // Validate settings before saving
      const validationErrors = validatePluginSettings(this.settings);
      if (validationErrors.length > 0) {
        Logger.error(
          'Validation errors prevented saving settings: ' + validationErrors.join('; '),
          'settings'
        );
        new Notice(`Cannot save settings: ${validationErrors[0]}`);
        return false;
      }

      Logger.debug('Saving settings: ' + JSON.stringify(this.settings), 'settings');
      await this.saveData(this.settings);
      Logger.info('Settings saved successfully', 'settings');
      return true;
    } catch (error) {
      // Use centralized error handling
      const { ErrorHandler } = await import('./src/error-handler');
      ErrorHandler.handleError(error, 'settings save');
      return false;
    }
  }
}

class OllamaSettingTab extends PluginSettingTab {
  private plugin: OllamaPlugin;

  constructor(app: App, plugin: OllamaPlugin) {
    super(app, plugin);
    this.plugin = plugin;
  }

  display(): void {
    const container = this.containerEl.createDiv() as HTMLElement;
    container.empty();

    new Setting(container)
      .setName('Ollama URL')
      .setDesc('URL of your Ollama instance')
      .addText((text) =>
        text.setValue(this.plugin.settings.ollamaUrl).onChange(async (value) => {
          const urlValidation = validateOllamaUrl(value);
          if (urlValidation.valid) {
            Logger.debug('URL changed to: ' + value, 'settings');
            this.plugin.settings.ollamaUrl = value;
            await this.plugin.saveSettings();
          } else {
            Logger.warn('Invalid URL format: ' + urlValidation.error, 'settings');
            new Notice(urlValidation.error || 'Invalid Ollama URL format.');
          }
        })
      );

    new Setting(container)
      .setName('Model')
      .setDesc('Model to use for chat')
      .addText((text) =>
        text.setValue(this.plugin.settings.model).onChange(async (value) => {
          const modelValidation = validateModelName(value);
          if (modelValidation.valid) {
            Logger.debug('Model changed to: ' + value, 'settings');
            this.plugin.settings.model = value;
            await this.plugin.saveSettings();
          } else {
            Logger.warn('Invalid model name format: ' + modelValidation.error, 'settings');
            new Notice(modelValidation.error || 'Invalid model name format.');
          }
        })
      );
  }

  hide(): void {
    this.containerEl.empty();
  }
}