import { App, Modal, Notice, Setting } from 'obsidian';
import PromptfirePlugin from './main';
import { HistoryEntry, formatRelativeTime } from './history';
import { ContextSnapshot, SnapshotManager, generateSnapshotId } from './snapshots';

export class SaveSnapshotModal extends Modal {
	private plugin: PromptfirePlugin;
	private entry: HistoryEntry;
	private snapshotManager: SnapshotManager;
	private name = '';
	private description = '';

	constructor(app: App, plugin: PromptfirePlugin, entry: HistoryEntry) {
		super(app);
		this.plugin = plugin;
		this.entry = entry;
		this.snapshotManager = plugin.snapshotManager;
	}

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

		contentEl.createEl('h2', { text: 'Save as Snapshot' });

		// Summary
		const summary = contentEl.createDiv();
		summary.style.marginBottom = '15px';
		summary.style.padding = '10px';
		summary.style.backgroundColor = 'var(--background-secondary)';
		summary.style.borderRadius = '4px';
		summary.style.fontSize = '12px';

		const fileCount = this.entry.metadata.includedFiles.length;
		const templateName = this.entry.metadata.templateName || 'None';
		const activeNote = this.entry.metadata.activeNote || 'None';

		summary.createEl('div', { text: `Files: ${fileCount}` });
		summary.createEl('div', { text: `Template: ${templateName}` });
		summary.createEl('div', { text: `Active note: ${activeNote}` });

		// Name field
		let nameInput: HTMLInputElement;
		new Setting(contentEl)
			.setName('Name')
			.setDesc('A short name for this snapshot (required)')
			.addText(text => {
				nameInput = text.inputEl;
				text.setPlaceholder('e.g., "Auth refactor context"')
					.onChange(value => { this.name = value; });
			});

		// Description field
		new Setting(contentEl)
			.setName('Description')
			.setDesc('Optional notes about when to use this snapshot')
			.addTextArea(text => {
				text.setPlaceholder('e.g., "Use when working on auth module"')
					.onChange(value => { this.description = value; });
				text.inputEl.rows = 2;
				text.inputEl.style.width = '100%';
			});

		// Buttons
		const buttonContainer = contentEl.createDiv();
		buttonContainer.style.display = 'flex';
		buttonContainer.style.justifyContent = 'flex-end';
		buttonContainer.style.gap = '10px';
		buttonContainer.style.marginTop = '20px';

		const saveBtn = buttonContainer.createEl('button', { text: 'Save Snapshot', cls: 'mod-cta' });
		saveBtn.addEventListener('click', async () => {
			if (!this.name.trim()) {
				new Notice('Name is required');
				return;
			}

			const snapshot: ContextSnapshot = {
				id: generateSnapshotId(),
				name: this.name.trim(),
				description: this.description.trim() || undefined,
				createdAt: Date.now(),
				notePaths: this.entry.metadata.includedFiles,
				activeNotePath: this.entry.metadata.activeNote,
				templateId: this.entry.metadata.templateId,
				includeFilenames: this.plugin.settings.includeFilenames,
				separator: this.plugin.settings.separator,
			};

			const success = await this.snapshotManager.saveSnapshot(snapshot);
			if (success) {
				new Notice(`Snapshot saved: ${snapshot.name}`);
				this.close();
			} else {
				new Notice('Failed to save snapshot');
			}
		});

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

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

export class SnapshotListModal extends Modal {
	private plugin: PromptfirePlugin;
	private snapshotManager: SnapshotManager;

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

	async onOpen() {
		await this.loadAndRender();
	}

	async loadAndRender() {
		const { contentEl } = this;
		contentEl.empty();
		contentEl.addClass('promptfire-snapshot-list');

		contentEl.createEl('h2', { text: 'Context Snapshots' });

		const snapshots = await this.snapshotManager.loadSnapshots();

		if (snapshots.length === 0) {
			const notice = contentEl.createEl('p', {
				text: 'No snapshots yet. Open a history entry and click "Save as Snapshot" to create one.'
			});
			notice.style.fontStyle = 'italic';
			notice.style.color = 'var(--text-muted)';
			return;
		}

		const countInfo = contentEl.createEl('p', {
			text: `${snapshots.length} snapshot${snapshots.length !== 1 ? 's' : ''}`
		});
		countInfo.style.color = 'var(--text-muted)';
		countInfo.style.marginBottom = '10px';

		const list = contentEl.createDiv({ cls: 'snapshot-list' });
		list.style.maxHeight = '400px';
		list.style.overflow = 'auto';
		list.style.border = '1px solid var(--background-modifier-border)';
		list.style.borderRadius = '4px';

		for (const snapshot of snapshots) {
			const row = list.createDiv({ cls: 'snapshot-row' });
			row.style.display = 'flex';
			row.style.alignItems = 'center';
			row.style.padding = '10px 12px';
			row.style.borderBottom = '1px solid var(--background-modifier-border)';
			row.style.gap = '10px';

			// Info
			const infoContainer = row.createDiv();
			infoContainer.style.flex = '1';

			const header = infoContainer.createDiv();
			header.style.display = 'flex';
			header.style.alignItems = 'center';
			header.style.gap = '8px';

			const nameEl = header.createEl('span', { text: snapshot.name });
			nameEl.style.fontWeight = '500';

			const timeEl = header.createEl('span', { text: formatRelativeTime(snapshot.createdAt) });
			timeEl.style.color = 'var(--text-muted)';
			timeEl.style.fontSize = '12px';

			// Stats
			const stats = infoContainer.createDiv();
			stats.style.fontSize = '12px';
			stats.style.color = 'var(--text-muted)';
			stats.style.marginTop = '4px';

			const fileCount = snapshot.notePaths.length;
			const templateName = snapshot.templateId
				? (this.plugin.settings.promptTemplates.find(t => t.id === snapshot.templateId)?.name || 'Unknown template')
				: 'No template';
			stats.setText(`${fileCount} files · ${templateName}`);

			// Description
			if (snapshot.description) {
				const desc = infoContainer.createDiv({ text: snapshot.description });
				desc.style.fontSize = '12px';
				desc.style.fontStyle = 'italic';
				desc.style.marginTop = '4px';
			}

			// Actions
			const actions = row.createDiv();
			actions.style.display = 'flex';
			actions.style.gap = '4px';

			const replayBtn = actions.createEl('button', { text: '\u25B6' });
			replayBtn.title = 'Replay snapshot';
			replayBtn.style.padding = '4px 8px';
			replayBtn.addEventListener('click', async () => {
				this.close();
				await this.plugin.replaySnapshot(snapshot);
			});

			const deleteBtn = actions.createEl('button', { text: '\u2715' });
			deleteBtn.title = 'Delete snapshot';
			deleteBtn.style.padding = '4px 8px';
			deleteBtn.addEventListener('click', async () => {
				await this.snapshotManager.deleteSnapshot(snapshot.id);
				new Notice('Snapshot deleted');
				await this.loadAndRender();
			});
		}

		// Remove bottom border from last row
		const lastRow = list.lastElementChild as HTMLElement;
		if (lastRow) {
			lastRow.style.borderBottom = 'none';
		}
	}

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