import {availableSpeedProviders, currentSpeedProvider, getDefaultSpeedProvider, updateSpeedProvider} from "./api.js";
import {SpeedProvider} from "./speed_provider.js"

export const settingsKey = "drag-ruler";

export function registerSettings() {
	game.settings.register(settingsKey, "dataVersion", {
		scope: "world",
		config: false,
		type: String,
		default: "fresh install"
	})

	game.settings.register(settingsKey, "swapSpacebarRightClick", {
		name: "drag-ruler.settings.swapSpacebarRightClick.name",
		hint: "drag-ruler.settings.swapSpacebarRightClick.hint",
		scope: "client",
		config: true,
		type: Boolean,
		default: false,
	})

	game.settings.register(settingsKey, "alwaysShowSpeedForPCs", {
		name: "drag-ruler.settings.alwaysShowSpeedForPCs.name",
		hint: "drag-ruler.settings.alwaysShowSpeedForPCs.hint",
		scope: "world",
		config: true,
		type: Boolean,
		default: true,
	})

	game.settings.register(settingsKey, "showGMRulerToPlayers", {
		name: "drag-ruler.settings.showGMRulerToPlayers.name",
		hint: "drag-ruler.settings.showGMRulerToPlayers.hint",
		scope: "world",
		config: true,
		type: Boolean,
		default: true,
	})

	game.settings.register(settingsKey, "enableMovementHistory", {
		name: "drag-ruler.settings.enableMovementHistory.name",
		hint: "drag-ruler.settings.enableMovementHistory.hint",
		scope: "world",
		config: true,
		type: Boolean,
		default: true,
	});

	game.settings.register(settingsKey, "lastTerrainRulerHintTime", {
		config: false,
		type: Number,
		default: 0,
	});

	game.settings.register(settingsKey, "neverShowTerrainRulerHint", {
		config: false,
		type: Boolean,
		default: false,
	});

	// This setting will be modified by the api if modules register to it
	game.settings.register(settingsKey, "speedProvider", {
		scope: "world",
		config: false,
		type: String,
		default: getDefaultSpeedProvider(),
		onChange: updateSpeedProvider,
	})

	game.settings.registerMenu(settingsKey, "speedProviderSettings", {
		name: "drag-ruler.settings.speedProviderSettings.name",
		hint: "drag-ruler.settings.speedProviderSettings.hint",
		label: "drag-ruler.settings.speedProviderSettings.button",
		icon: "fas fa-tachometer-alt",
		type: SpeedProviderSettings,
		restricted: false,
	})
}

class SpeedProviderSettings extends FormApplication {
	static get defaultOptions() {
		return mergeObject(super.defaultOptions, {
			id: "drag-ruler-speed-provider-settings",
			title: game.i18n.localize("drag-ruler.settings.speedProviderSettings.windowTitle"),
			template: "modules/drag-ruler/templates/speed_provider_settings.html",
			width: 600,
		})
	}

	getData(options={}) {
		const data = {}
		data.isGM = game.user.isGM
		const selectedProvider = currentSpeedProvider.id

		// Insert all speed providers into the template data
		data.providers = Object.values(availableSpeedProviders).map(speedProvider => {
			const provider = {}
			provider.id = speedProvider.id
			provider.hasSettings = speedProvider instanceof SpeedProvider
			if (provider.hasSettings)
				provider.settings = enumerateProviderSettings(speedProvider)
			let dotPosition = provider.id.indexOf(".")
			if (dotPosition === -1)
				dotPosition = provider.id.length
			const type = provider.id.substring(0, dotPosition)
			const id = provider.id.substring(dotPosition + 1)
			if (type === "native") {
				provider.selectTitle = game.i18n.localize("drag-ruler.settings.speedProviderSettings.speedProvider.choices.native")
			}
			else {
				let name
				if (type === "module") {
					name = game.modules.get(id).data.title
				}
				else {
					name = game.system.data.title
				}
				provider.selectTitle = game.i18n.format(`drag-ruler.settings.speedProviderSettings.speedProvider.choices.${type}`, {name})
			}
			provider.isSelected = provider.id === selectedProvider
			return provider
		})
		data.selectedProviderName = data.providers.find(provider => provider.isSelected).selectTitle

		data.providerSelection = {
			id: "speedProvider",
			name: game.i18n.localize("drag-ruler.settings.speedProviderSettings.speedProvider.name"),
			hint: game.i18n.localize("drag-ruler.settings.speedProviderSettings.speedProvider.hint"),
			type: String,
			choices: data.providers.reduce((choices, provider) => {
				choices[provider.id] = provider.selectTitle
				return choices
			}, {}),
			value: selectedProvider,
			isCheckbox: false,
			isSelect: true,
			isRange: false,
		}
		return data
	}

	async _updateObject(event, formData) {
		const selectedSpeedProvider = game.user.isGM ? formData.speedProvider : game.settings.get(settingsKey, "speedProvider")
		for (let [key, value] of Object.entries(formData)) {
			// Check if this is color, convert the value to an integer
			const splitKey = key.split(".", 3)
			if (splitKey[0] !== "native")
				splitKey.shift()
			if (splitKey.length >= 2 && splitKey[1] == "color") {
				value = parseInt(value.substring(1), 16)
			}

			// Don't change settings for speed providers that aren't currently active
			if (key !== "speedProvider" && !key.startsWith(selectedSpeedProvider))
				continue

			// Get the key for the current setting
			let setting
			if (key === "speedProvider")
				setting = "speedProvider"
			else
				setting = `speedProviders.${key}`

			// Get the old setting value
			const oldValue = game.settings.get(settingsKey, setting)

			// Only update the setting if it has been changed (this leaves the default in place if it hasn't been touched)
			if (value !== oldValue)
				game.settings.set(settingsKey, setting, value)
		}

		// Activate the configured speed provider
		updateSpeedProvider()
	}

	activateListeners(html) {
		super.activateListeners(html)
		html.find("select[name=speedProvider]").change(this.onSpeedProviderChange.bind(this))
	}

	onSpeedProviderChange(event) {
		// Hide all module settings
		document.querySelectorAll(".drag-ruler-provider-settings").forEach(element => element.style.display = "none")
		// Show the settings block for the currently selected module
		document.getElementById(`drag-ruler.provider.${event.currentTarget.value}`).style.display = ""

		// Recalculate window height
		this.element[0].style.height = null
		this.position.height = undefined
	}
}

function toDomHex(value) {
	const hex = value.toString(16)
	return "#" + "0".repeat(Math.max(0, 6 - hex.length)) + hex
}

function enumerateProviderSettings(provider) {
	const colorSettings = []
	const unreachableColor = {id: "unreachable", name: "drag-ruler.settings.speedProviderSettings.color.unreachable.name"}

	// Resolve settings for the colors
	for (const color of provider.colors.concat([unreachableColor])) {
		// Localize the name, if avaliable. If no name is available use the id as name
		const colorName = color.name ? game.i18n.localize(color.name) : color.id
		let hint
		if (color === unreachableColor)
			hint = game.i18n.localize("drag-ruler.settings.speedProviderSettings.color.unreachable.hint")
		else
			hint = game.i18n.format("drag-ruler.settings.speedProviderSettings.color.hint", {colorName})
		colorSettings.push({
			id: `${provider.id}.color.${color.id}`,
			name: game.i18n.format("drag-ruler.settings.speedProviderSettings.color.name", {colorName}),
			hint: hint,
			type: Number,
			value: toDomHex(game.settings.get(settingsKey, `speedProviders.${provider.id}.color.${color.id}`)),
			isCheckbox: false,
			isSelect: false,
			isRange: false,
			isColor: true,
		})
	}

	// Prepare regular settings
	const settings = []
	for (const setting of provider.settings) {
		try {
			if (setting.scope === "world" && !game.user.isGM)
				continue
			const s = duplicate(setting)
			s.id = `${provider.id}.setting.${s.id}`
			s.name = game.i18n.localize(s.name)
			s.hint = game.i18n.localize(s.hint)
			s.value = provider.getSetting(setting.id)
			s.type = setting.type instanceof Function ? setting.type.name : "String"
			s.isCheckbox = setting.type === Boolean
			s.isSelect = s.choices !== undefined
			s.isRange = (setting.type === Number) && s.range
			s.isColor = false
			settings.push(s)
		}
		catch (e) {
			console.warn(`Drag Ruler | The following error occured while rendering setting "${setting.id}" of module/system "${this.id}. It won't be displayed.`)
			console.error(e)
		}
	}

	return settings.concat(colorSettings)
}
