/**
 * Declarative settings schema. Each `SettingsField` describes a single setting
 * that renders as a labeled form control in the Settings panel. Keep this
 * independent of Svelte so the same schema can drive future serializers
 * (export/import settings, URL state, etc.).
 */

export type FieldKind = 'boolean' | 'select' | 'number' | 'string';

export interface BaseField<K extends FieldKind> {
	kind: K;
	/** Dot-separated path into AppSettings (e.g. `'map.baseLayer'`). */
	path: string;
	labelKey: string;
	descriptionKey?: string;
}

export interface BooleanField extends BaseField<'boolean'> {}

export interface NumberField extends BaseField<'number'> {
	min?: number;
	max?: number;
	step?: number;
}

export interface StringField extends BaseField<'string'> {
	placeholder?: string;
}

export interface SelectField extends BaseField<'select'> {
	options: { value: string; labelKey: string }[];
}

export type SettingsField = BooleanField | NumberField | StringField | SelectField;

export interface SettingsSection {
	titleKey: string;
	fields: SettingsField[];
}

export const SETTINGS_SCHEMA: SettingsSection[] = [
	{
		titleKey: 'settings.language',
		fields: [
			{
				kind: 'select',
				path: 'locale',
				labelKey: 'settings.language',
				options: [
					{ value: 'ru', labelKey: 'common.yes' },
					{ value: 'en', labelKey: 'common.yes' },
				],
			},
		],
	},
	{
		titleKey: 'settings.map',
		fields: [
			{
				kind: 'select',
				path: 'map.baseLayer',
				labelKey: 'settings.baseLayer',
				options: [
					{ value: 'osm', labelKey: 'settings.baseLayer' },
					{ value: 'satellite', labelKey: 'settings.baseLayer' },
				],
			},
			{ kind: 'boolean', path: 'map.showScale', labelKey: 'settings.showScale' },
			{ kind: 'boolean', path: 'map.showNavigation', labelKey: 'settings.showNavigation' },
		],
	},
	{
		titleKey: 'settings.units',
		fields: [
			{
				kind: 'select',
				path: 'units.system',
				labelKey: 'settings.units',
				options: [
					{ value: 'metric', labelKey: 'settings.metric' },
					{ value: 'imperial', labelKey: 'settings.imperial' },
				],
			},
		],
	},
	{
		titleKey: 'settings.wind',
		fields: [
			{ kind: 'boolean', path: 'wind.enabled', labelKey: 'settings.windEnabled' },
			{
				kind: 'number',
				path: 'wind.step',
				labelKey: 'settings.windStep',
				min: 0.25,
				max: 10,
				step: 0.25,
			},
			{
				kind: 'number',
				path: 'wind.trajectoryStep',
				labelKey: 'settings.windTrajectoryStep',
				min: 0.25,
				max: 5,
				step: 0.25,
			},
			{
				kind: 'number',
				path: 'wind.prefetchIntervalMinutes',
				labelKey: 'settings.windPrefetchInterval',
				min: 5,
				max: 60,
				step: 5,
			},
			{
				kind: 'number',
				path: 'wind.maxFlightDurationHours',
				labelKey: 'settings.windMaxDuration',
				min: 1,
				max: 8,
				step: 0.5,
			},
			{
				kind: 'number',
				path: 'wind.maxRegionDegrees',
				labelKey: 'settings.windMaxRegion',
				min: 5,
				max: 60,
				step: 5,
			},
			{
				kind: 'number',
				path: 'wind.trajectoryMarginDegrees',
				labelKey: 'settings.windMargin',
				min: 0.5,
				max: 5,
				step: 0.5,
			},
			{
				kind: 'number',
				path: 'wind.particleDensity',
				labelKey: 'settings.windParticleDensity',
				min: 0.25,
				max: 3,
				step: 0.25,
			},
			{
				kind: 'number',
				path: 'wind.particleSpeed',
				labelKey: 'settings.windParticleSpeed',
				min: 0.25,
				max: 4,
				step: 0.25,
			},
			{
				kind: 'number',
				path: 'wind.trailPersistence',
				labelKey: 'settings.windTrailPersistence',
				min: 0.7,
				max: 0.98,
				step: 0.02,
			},
			{
				kind: 'number',
				path: 'wind.maxVelocity',
				labelKey: 'settings.windMaxVelocity',
				min: 10,
				max: 80,
				step: 5,
			},
		],
	},
];