import { Setting, PluginSettingTab, App, Plugin } from 'obsidian';
import { WaypointSettings, DEFAULT_SETTINGS, PeriodNoteSettings } from 'src/settings';

export class WaypointSettingTab extends PluginSettingTab {
	private plugin: Plugin;
	private settings: WaypointSettings;
	private onSettingsChange: () => void;
	private activeTab: 'calendar' | 'periodic' | 'recent' | 'display' = 'calendar';

	constructor(app: App, plugin: Plugin, settings: WaypointSettings, onSettingsChange: () => void) {
		super(app, plugin);
		this.plugin = plugin;
		this.settings = settings;
		this.onSettingsChange = onSettingsChange;
	}

	display(): void {
		const { containerEl } = this;
		containerEl.empty();

		// ── Tab bar ──
		const tabBar = containerEl.createDiv({ cls: 'waypoint-settings-tabs' });
		const tabs = [
			{ key: 'calendar' as const, label: 'Calendar' },
			{ key: 'periodic' as const, label: 'Periodic Notes' },
			{ key: 'recent' as const, label: 'Recent Files' },
			{ key: 'display' as const, label: 'Display' },
		];

		for (const tab of tabs) {
			const btn = tabBar.createEl('button', {
				cls: `waypoint-settings-tab${this.activeTab === tab.key ? ' is-active' : ''}`,
				text: tab.label,
			});
			btn.addEventListener('click', () => {
				this.activeTab = tab.key;
				this.display();
			});
		}

		const tabContent = containerEl.createDiv({ cls: 'waypoint-settings-content' });

		switch (this.activeTab) {
			case 'calendar':
				this.renderCalendarTab(tabContent);
				break;
			case 'periodic':
				this.renderPeriodicTab(tabContent);
				break;
			case 'recent':
				this.renderRecentTab(tabContent);
				break;
			case 'display':
				this.renderDisplayTab(tabContent);
				break;
		}
	}

	// ═══════════════════════════════
	//  Calendar tab
	// ═══════════════════════════════

	private renderCalendarTab(container: HTMLElement): void {
		new Setting(container)
			.setName('First day of week')
			.setDesc('Which day the calendar week starts on.')
			.addDropdown((dropdown) => {
				dropdown
					.addOption('0', 'Sunday')
					.addOption('1', 'Monday')
					.setValue(String(this.settings.calendar.firstDayOfWeek))
					.onChange((value) => {
						this.settings.calendar.firstDayOfWeek = parseInt(value, 10);
						this.saveAndRefresh();
					});
			});

		new Setting(container)
			.setName('Show note indicators')
			.setDesc('Show a dot on days that have existing notes.')
			.addToggle((toggle) => {
				toggle
					.setValue(this.settings.calendar.showNoteIndicators)
					.onChange((value) => {
						this.settings.calendar.showNoteIndicators = value;
						this.saveAndRefresh();
					});
			});
	}

	// ═══════════════════════════════
	//  Periodic Notes tab
	// ═══════════════════════════════

	private renderPeriodicTab(container: HTMLElement): void {
		this.addPeriodNoteSettings(container, 'Daily', this.settings.daily);
		this.addPeriodNoteSettings(container, 'Weekly', this.settings.weekly);
		this.addPeriodNoteSettings(container, 'Monthly', this.settings.monthly);
		this.addPeriodNoteSettings(container, 'Quarterly', this.settings.quarterly);
		this.addPeriodNoteSettings(container, 'Yearly', this.settings.yearly);
	}

	private addPeriodNoteSettings(container: HTMLElement, label: string, period: PeriodNoteSettings): void {
		new Setting(container).setHeading().setName(label);

		new Setting(container)
			.setName('Folder')
			.setDesc(`Folder path for ${label.toLowerCase()} notes.`)
			.addText((text) => {
				text.setPlaceholder('periodic/daily');
				text.setValue(period.folder);
				text.onChange((value) => {
					period.folder = value;
					this.saveAndRefresh();
				});
			});

		new Setting(container)
			.setName('Name format')
			.setDesc(`Date format for ${label.toLowerCase()} note filenames (moment.js format).`)
			.addText((text) => {
				text.setPlaceholder('yyyy-MM-dd');
				text.setValue(period.nameFormat);
				text.onChange((value) => {
					period.nameFormat = value;
					this.saveAndRefresh();
				});
			});

		new Setting(container)
			.setName('Template file')
			.setDesc(`Path to the template file (without .md extension).`)
			.addText((text) => {
				text.setPlaceholder('Templates/Daily note');
				text.setValue(period.templateFile);
				text.onChange((value) => {
					period.templateFile = value;
					this.saveAndRefresh();
				});
			});

		new Setting(container)
			.setName('Type property')
			.setDesc(`Value for the 'type' frontmatter property.`)
			.addText((text) => {
				text.setPlaceholder('daily-note');
				text.setValue(period.typeProperty);
				text.onChange((value) => {
					period.typeProperty = value;
					this.saveAndRefresh();
				});
			});
	}

	// ═══════════════════════════════
	//  Recent Files tab
	// ═══════════════════════════════

	private renderRecentTab(container: HTMLElement): void {
		new Setting(container)
			.setName('Max items')
			.setDesc('Maximum number of recent files to track.')
			.addText((text) => {
				text.inputEl.setAttr('type', 'number');
				text.inputEl.setAttr('placeholder', '50');
				text.setValue(String(this.settings.recentFiles.maxItems));
				text.inputEl.onblur = () => {
					const val = parseInt(text.getValue(), 10);
					if (!isNaN(val) && val > 0) {
						this.settings.recentFiles.maxItems = val;
						this.saveAndRefresh();
					}
				};
			});

		new Setting(container)
			.setName('Update on')
			.setDesc('When to add a file to the recent list.')
			.addDropdown((dropdown) => {
				dropdown
					.addOption('file-open', 'File opened')
					.addOption('file-edit', 'File changed')
					.setValue(this.settings.recentFiles.updateOn)
					.onChange((value: 'file-open' | 'file-edit') => {
						this.settings.recentFiles.updateOn = value;
						this.saveAndRefresh();
					});
			});

		const pathDesc = new DocumentFragment();
		pathDesc.appendText('Regex patterns for paths to exclude. One per line.');
		new Setting(container)
			.setName('Omitted paths')
			.setDesc(pathDesc)
			.addTextArea((text) => {
				text.inputEl.setAttr('rows', 4);
				text.setPlaceholder('^archives/\n\\.png$');
				text.setValue(this.settings.recentFiles.omittedPaths.join('\n'));
				text.inputEl.onblur = () => {
					this.settings.recentFiles.omittedPaths = text.getValue().split('\n').filter(p => p.trim());
					this.saveAndRefresh();
				};
			});

		const tagDesc = new DocumentFragment();
		tagDesc.appendText('Regex patterns for frontmatter tags to exclude. One per line.');
		new Setting(container)
			.setName('Omitted tags')
			.setDesc(tagDesc)
			.addTextArea((text) => {
				text.inputEl.setAttr('rows', 4);
				text.setPlaceholder('ignore\narchive');
				text.setValue(this.settings.recentFiles.omittedTags.join('\n'));
				text.inputEl.onblur = () => {
					this.settings.recentFiles.omittedTags = text.getValue().split('\n').filter(t => t.trim());
					this.saveAndRefresh();
				};
			});
	}

	// ═══════════════════════════════
	//  Display tab
	// ═══════════════════════════════

	private renderDisplayTab(container: HTMLElement): void {
		new Setting(container).setHeading().setName('Bookmarks');

		this.addSliderSetting(container,
			'Row size', 'Height of bookmark items.',
			this.settings.display, 'rowSize', 18, 40, 1, 'px',
		);
		this.addSliderSetting(container,
			'Row spacing', 'Gap between bookmark items.',
			this.settings.display, 'rowSpacing', 0, 12, 1, 'px',
		);
		this.addSliderSetting(container,
			'Indent size', 'Indent per nesting depth.',
			this.settings.display, 'indentSize', 8, 32, 2, 'px',
		);
		this.addSliderSetting(container,
			'Font size', 'Label font size.',
			this.settings.display, 'fontSize', 10, 18, 1, 'px',
		);
		this.addSliderSetting(container,
			'Icon size', 'Bookmark icon size.',
			this.settings.display, 'iconSize', 12, 24, 1, 'px',
		);

		new Setting(container).setHeading().setName('Calendar');

		this.addSliderSetting(container,
			'Cell size', 'Height of calendar day cells.',
			this.settings.display, 'calendarCellSize', 20, 48, 2, 'px',
		);

		new Setting(container)
			.addButton((btn) =>
				btn
					.setButtonText('Reset to defaults')
					.onClick(() => {
						this.settings.display = { ...DEFAULT_SETTINGS.display };
						this.saveAndRefresh();
						this.display();
					}),
			);
	}

	private addSliderSetting(
		container: HTMLElement,
		name: string,
		desc: string,
		obj: any,
		key: string,
		min: number,
		max: number,
		step: number,
		unit: string,
	): void {
		const setting = new Setting(container)
			.setName(name)
			.setDesc(`${desc} (${obj[key]}${unit})`);

		setting.addSlider((slider) => {
			slider
				.setLimits(min, max, step)
				.setValue(obj[key])
				.setDynamicTooltip()
				.onChange((value) => {
					obj[key] = value;
					setting.setDesc(`${desc} (${value}${unit})`);
					this.saveAndRefresh();
				});
		});
	}

	private async saveAndRefresh(): Promise<void> {
		await this.plugin.saveData(this.settings);
		this.onSettingsChange();
	}
}