import { App, Modal, Notice, Setting } from 'obsidian';
import PromptfirePlugin from './main';
import {
	ContextSource,
	SourceType,
	SourcePosition,
	FreetextConfig,
	FileConfig,
	ShellConfig,
	generateSourceId,
	SourceRegistry,
} from './sources';

export class SourceModal extends Modal {
	plugin: PromptfirePlugin;
	sourceType: SourceType;
	existingSource: ContextSource | null;
	onSave: () => void;

	// Form state
	name: string = '';
	enabled: boolean = true;
	position: SourcePosition = 'prefix';

	// Freetext config
	freetextContent: string = '';

	// File config
	filePath: string = '';
	recursive: boolean = false;
	filePattern: string = '*';

	// Shell config
	shellCommand: string = '';
	shellArgs: string = '';
	shellCwd: string = '';
	shellTimeout: number = 5000;

	constructor(
		app: App,
		plugin: PromptfirePlugin,
		sourceType: SourceType,
		existingSource: ContextSource | null,
		onSave: () => void
	) {
		super(app);
		this.plugin = plugin;
		this.sourceType = sourceType;
		this.existingSource = existingSource;
		this.onSave = onSave;

		// Load existing source data if editing
		if (existingSource) {
			this.name = existingSource.name;
			this.enabled = existingSource.enabled;
			this.position = existingSource.position;

			switch (existingSource.type) {
				case 'freetext':
					this.freetextContent = (existingSource.config as FreetextConfig).content;
					break;
				case 'file':
				case 'folder':
					const fileConfig = existingSource.config as FileConfig;
					this.filePath = fileConfig.path;
					this.recursive = fileConfig.recursive || false;
					this.filePattern = fileConfig.pattern || '*';
					break;
				case 'shell':
					const shellConfig = existingSource.config as ShellConfig;
					this.shellCommand = shellConfig.command;
					this.shellArgs = shellConfig.args.join(' ');
					this.shellCwd = shellConfig.cwd || '';
					this.shellTimeout = shellConfig.timeout || 5000;
					break;
			}
		}
	}

	onOpen() {
		const { contentEl } = this;
		contentEl.empty();
		contentEl.addClass('promptfire-source-modal');

		const title = this.existingSource ? 'Edit Source' : 'Add Source';
		const typeLabel = this.getTypeLabel();
		contentEl.createEl('h2', { text: `${title}: ${typeLabel}` });

		// Common fields
		new Setting(contentEl)
			.setName('Name')
			.setDesc('Display name for this source')
			.addText(text => text
				.setPlaceholder('My Context')
				.setValue(this.name)
				.onChange(v => this.name = v));

		new Setting(contentEl)
			.setName('Position')
			.setDesc('Where to insert this content')
			.addDropdown(dropdown => dropdown
				.addOption('prefix', 'Prefix (before vault content)')
				.addOption('suffix', 'Suffix (after vault content)')
				.setValue(this.position)
				.onChange(v => this.position = v as SourcePosition));

		new Setting(contentEl)
			.setName('Enabled')
			.addToggle(toggle => toggle
				.setValue(this.enabled)
				.onChange(v => this.enabled = v));

		// Type-specific fields
		contentEl.createEl('hr');

		switch (this.sourceType) {
			case 'freetext':
				this.renderFreetextFields(contentEl);
				break;
			case 'file':
			case 'folder':
				this.renderFileFields(contentEl);
				break;
			case 'shell':
				this.renderShellFields(contentEl);
				break;
		}

		// Buttons
		contentEl.createEl('hr');

		const buttonContainer = contentEl.createDiv({ cls: 'button-container' });
		buttonContainer.style.display = 'flex';
		buttonContainer.style.justifyContent = 'flex-end';
		buttonContainer.style.gap = '10px';

		const testBtn = buttonContainer.createEl('button', { text: 'Test' });
		testBtn.addEventListener('click', () => this.testSource());

		const cancelBtn = buttonContainer.createEl('button', { text: 'Cancel' });
		cancelBtn.addEventListener('click', () => this.close());

		const saveBtn = buttonContainer.createEl('button', { text: 'Save', cls: 'mod-cta' });
		saveBtn.addEventListener('click', () => this.save());
	}

	private getTypeLabel(): string {
		switch (this.sourceType) {
			case 'freetext': return 'Freetext';
			case 'file': return 'File';
			case 'folder': return 'Folder';
			case 'shell': return 'Shell Command';
			default: return 'Unknown';
		}
	}

	private renderFreetextFields(container: HTMLElement) {
		new Setting(container)
			.setName('Content')
			.setDesc('Text content to include')
			.addTextArea(text => {
				text.setPlaceholder('Enter your context text here...')
					.setValue(this.freetextContent)
					.onChange(v => this.freetextContent = v);
				text.inputEl.rows = 8;
				text.inputEl.style.width = '100%';
			});
	}

	private renderFileFields(container: HTMLElement) {
		new Setting(container)
			.setName('Path')
			.setDesc('Absolute path to file or folder')
			.addText(text => text
				.setPlaceholder('/home/user/project/README.md')
				.setValue(this.filePath)
				.onChange(v => this.filePath = v));

		new Setting(container)
			.setName('Recursive')
			.setDesc('Read folder contents recursively')
			.addToggle(toggle => toggle
				.setValue(this.recursive)
				.onChange(v => this.recursive = v));

		new Setting(container)
			.setName('Pattern')
			.setDesc('Glob pattern for file matching (e.g. *.md, *.ts)')
			.addText(text => text
				.setPlaceholder('*')
				.setValue(this.filePattern)
				.onChange(v => this.filePattern = v));
	}

	private renderShellFields(container: HTMLElement) {
		new Setting(container)
			.setName('Command')
			.setDesc('Command to execute (e.g. git, ls, cat)')
			.addText(text => text
				.setPlaceholder('git')
				.setValue(this.shellCommand)
				.onChange(v => this.shellCommand = v));

		new Setting(container)
			.setName('Arguments')
			.setDesc('Space-separated arguments')
			.addText(text => text
				.setPlaceholder('log --oneline -10')
				.setValue(this.shellArgs)
				.onChange(v => this.shellArgs = v));

		new Setting(container)
			.setName('Working directory')
			.setDesc('Optional working directory for the command')
			.addText(text => text
				.setPlaceholder('/home/user/project')
				.setValue(this.shellCwd)
				.onChange(v => this.shellCwd = v));

		new Setting(container)
			.setName('Timeout (ms)')
			.setDesc('Maximum execution time')
			.addText(text => text
				.setPlaceholder('5000')
				.setValue(String(this.shellTimeout))
				.onChange(v => {
					const num = parseInt(v, 10);
					if (!isNaN(num) && num > 0) {
						this.shellTimeout = num;
					}
				}));
	}

	private buildSource(): ContextSource {
		let config;
		let type: SourceType = this.sourceType;

		switch (this.sourceType) {
			case 'freetext':
				config = { content: this.freetextContent } as FreetextConfig;
				break;
			case 'file':
			case 'folder':
				config = {
					path: this.filePath,
					recursive: this.recursive,
					pattern: this.filePattern,
				} as FileConfig;
				type = this.recursive ? 'folder' : 'file';
				break;
			case 'shell':
				config = {
					command: this.shellCommand,
					args: this.shellArgs.split(/\s+/).filter(s => s),
					cwd: this.shellCwd || undefined,
					timeout: this.shellTimeout,
				} as ShellConfig;
				break;
			default:
				throw new Error(`Unknown source type: ${this.sourceType}`);
		}

		return {
			id: this.existingSource?.id || generateSourceId(),
			type,
			name: this.name || this.getDefaultName(),
			enabled: this.enabled,
			position: this.position,
			config,
		};
	}

	private getDefaultName(): string {
		switch (this.sourceType) {
			case 'freetext':
				return 'Freetext';
			case 'file':
			case 'folder':
				return this.filePath.split('/').pop() || 'File';
			case 'shell':
				return `${this.shellCommand} ${this.shellArgs}`.trim();
			default:
				return 'Source';
		}
	}

	private async testSource() {
		const source = this.buildSource();
		const registry = new SourceRegistry();

		try {
			const result = await registry.resolveSource(source);

			if (result.error) {
				new Notice(`Error: ${result.error}`);
			} else {
				const preview = result.content.substring(0, 500);
				const suffix = result.content.length > 500 ? '\n\n... (truncated)' : '';
				new Notice(`Success (${result.content.length} chars):\n${preview}${suffix}`, 10000);
			}
		} catch (error) {
			new Notice(`Test failed: ${error instanceof Error ? error.message : String(error)}`);
		}
	}

	private async save() {
		if (!this.validate()) {
			return;
		}

		const source = this.buildSource();

		if (this.existingSource) {
			// Update existing
			const index = this.plugin.settings.sources.findIndex(s => s.id === this.existingSource!.id);
			if (index >= 0) {
				this.plugin.settings.sources[index] = source;
			}
		} else {
			// Add new
			this.plugin.settings.sources.push(source);
		}

		await this.plugin.saveSettings();
		this.onSave();
		this.close();
	}

	private validate(): boolean {
		switch (this.sourceType) {
			case 'freetext':
				if (!this.freetextContent.trim()) {
					new Notice('Content is required');
					return false;
				}
				break;
			case 'file':
			case 'folder':
				if (!this.filePath.trim()) {
					new Notice('Path is required');
					return false;
				}
				break;
			case 'shell':
				if (!this.shellCommand.trim()) {
					new Notice('Command is required');
					return false;
				}
				break;
		}
		return true;
	}

	onClose() {
		const { contentEl } = this;
		contentEl.empty();
	}
}