<script lang="ts" module>
	const lastMetaUsed = writable<Meta | undefined>(undefined)
</script>

<script lang="ts">
	import { pathToMeta, type Meta } from '$lib/common'

	import { copyToClipboard, localeConcatAnd, pluralize } from '$lib/utils'
	import {
		AppService,
		FlowService,
		FolderService,
		ResourceService,
		ScheduleService,
		ScriptService,
		HttpTriggerService,
		VariableService,
		WebsocketTriggerService,
		KafkaTriggerService,
		PostgresTriggerService,
		NatsTriggerService,
		MqttTriggerService,
		SqsTriggerService,
		GcpTriggerService,
		AzureTriggerService,
		EmailTriggerService
	} from '$lib/gen'
	import { superadmin, userStore, workspaceStore } from '$lib/stores'
	import { createEventDispatcher, getContext, untrack } from 'svelte'
	import { writable } from 'svelte/store'
	import { Alert, Button } from './common'
	import { random_adj } from './random_positive_adjetive'
	import { ChevronDown, Copy, SearchCode } from 'lucide-svelte'
	import Tooltip from './Tooltip.svelte'
	import { tick } from 'svelte'
	import FolderPicker from './FolderPicker.svelte'
	import PathNameAutocomplete from './PathNameAutocomplete.svelte'
	import TextInput, {
		inputBaseClass,
		inputBorderClass,
		inputSizeClasses
	} from './text_input/TextInput.svelte'
	import Select from './select/Select.svelte'
	import { twMerge } from 'tailwind-merge'
	import InputError from './InputError.svelte'

	type PathKind =
		| 'resource'
		| 'script'
		| 'variable'
		| 'flow'
		| 'schedule'
		| 'app'
		| 'raw_app'
		| 'http_trigger'
		| 'websocket_trigger'
		| 'kafka_trigger'
		| 'postgres_trigger'
		| 'nats_trigger'
		| 'mqtt_trigger'
		| 'sqs_trigger'
		| 'gcp_trigger'
		| 'azure_trigger'
		| 'email_trigger'
	let meta: Meta | undefined = $state(undefined)
	interface Props {
		fullNamePlaceholder?: string | undefined
		namePlaceholder?: string
		initialPath: string
		path?: string
		error?: string
		disabled?: boolean
		checkInitialPathExistence?: boolean
		autofocus?: boolean
		dirty?: boolean
		kind: PathKind
		hideUser?: boolean
		disableEditing?: boolean
		size?: 'sm' | 'md'
		drawerOffset?: number
		/** Workspace the folder list and path-existence checks run against.
		 *  Defaults to the navigation `$workspaceStore`; pass the session's acting
		 *  workspace when the editor operates on a workspace other than the one the
		 *  top nav points at (see the sessions preview / dev-workspace flows). */
		workspaceOverride?: string
	}

	let {
		fullNamePlaceholder = undefined,
		namePlaceholder = '',
		initialPath,
		path = $bindable(undefined),
		error = $bindable(undefined),
		disabled = $bindable(false),
		checkInitialPathExistence = false,
		autofocus = true,
		dirty = $bindable(false),
		kind,
		hideUser = false,
		disableEditing = false,
		size = 'md',
		drawerOffset = 0,
		workspaceOverride = undefined
	}: Props = $props()

	let ws = $derived(workspaceOverride ?? $workspaceStore)

	$effect.pre(() => {
		if (path == undefined) {
			path = ''
		}
		if (error == undefined) {
			error = ''
		}
	})

	let inputP: PathNameAutocomplete | undefined = $state(undefined)

	const dispatch = createEventDispatcher()

	let folders: { name: string; write: boolean }[] = $state([])

	function onMetaChange() {
		if (meta) {
			path = metaToPath(meta)
			validate(meta, path, kind)
			$lastMetaUsed = {
				...meta,
				name: ''
			}
		}
	}

	function metaToPath(meta: Meta): string {
		return [meta.ownerKind?.charAt(0) ?? '', meta.owner, meta.name].join('/')
	}

	export function focus() {
		inputP?.focus()
	}

	function handleKeyUp(event: KeyboardEvent) {
		setDirty()
		const key = event.key

		if (key === 'Enter') {
			event.preventDefault()
			dispatch('enter')
		}
	}

	export function setName(x: string) {
		if (meta) {
			meta.name = x
			onMetaChange()
		}
	}

	export async function reset() {
		if (path == '' || path == 'u//' || path?.startsWith('tmp/') || path?.startsWith('hub/')) {
			if ($lastMetaUsed == undefined || $lastMetaUsed.owner != $userStore?.username) {
				meta = {
					ownerKind: hideUser ? 'folder' : 'user',
					name: fullNamePlaceholder ?? random_adj() + '_' + namePlaceholder,
					owner: ''
				}
				if (!hideUser) {
					if ($userStore?.username?.includes('@')) {
						meta.owner = $userStore!.username.split('@')[0].replace(/[^a-zA-Z0-9_]/g, '')
					} else {
						meta.owner = $userStore!.username!
					}
				}
			} else {
				if ($lastMetaUsed.ownerKind == 'user' && hideUser) {
					meta = {
						ownerKind: 'folder',
						owner: '',
						name: fullNamePlaceholder ?? random_adj() + '_' + namePlaceholder
					}
				} else {
					meta = {
						...$lastMetaUsed,
						name: fullNamePlaceholder ?? random_adj() + '_' + namePlaceholder
					}
				}
			}
			let newMeta = { ...meta }
			while (await pathExists(metaToPath(newMeta), kind)) {
				disabled = true
				error = 'finding an available name...'
				newMeta.name = random_adj() + '_' + (fullNamePlaceholder ?? namePlaceholder)
			}
			error = ''
			disabled = false
			meta = newMeta
			path = metaToPath(meta)
		} else {
			meta = pathToMeta(path ?? '', hideUser)
		}
	}

	async function loadFolders(): Promise<void> {
		let initialFolders: { name: string; write: boolean }[] = []
		let initialFolder = ''
		if (initialPath?.split('/')?.[0] == 'f') {
			initialFolder = initialPath?.split('/')?.[1]
			initialFolders.push({ name: initialFolder, write: true })
		}
		const excludedFolders = [initialFolder, 'app_groups', 'app_custom', 'app_themes']
		folders = initialFolders.concat(
			(
				await FolderService.listFolderNames({
					workspace: ws!
				})
			)
				.filter((x) => !excludedFolders.includes(x))
				.map((x) => ({
					name: x,
					write:
						$userStore?.folders?.includes(x) == true ||
						($userStore?.is_admin ?? false) ||
						($userStore?.is_super_admin ?? false)
				}))
		)
	}

	async function validate(meta: Meta, path: string, kind: PathKind) {
		error = ''
		validateName(meta) && validatePath(path, kind)
	}

	let validateTimeout: number | undefined = undefined

	async function validatePath(path: string, kind: PathKind): Promise<void> {
		if (validateTimeout) {
			clearTimeout(validateTimeout)
		}
		validateTimeout = setTimeout(async () => {
			if (
				(path == '' || checkInitialPathExistence || path != initialPath) &&
				(await pathExists(path, kind))
			) {
				error = 'path already used'
			} else if (meta && validateName(meta)) {
				error = ''
			}
			validateTimeout = undefined
		}, 500)
	}

	async function pathExists(path: string, kind: PathKind): Promise<boolean> {
		if (!path.length) return false
		if (kind == 'flow') {
			return await FlowService.existsFlowByPath({ workspace: ws!, path: path })
		} else if (kind == 'script') {
			return await ScriptService.existsScriptByPath({
				workspace: ws!,
				path: path
			})
		} else if (kind == 'resource') {
			return await ResourceService.existsResource({
				workspace: ws!,
				path: path
			})
		} else if (kind == 'variable') {
			return await VariableService.existsVariable({
				workspace: ws!,
				path: path
			})
		} else if (kind == 'schedule') {
			return await ScheduleService.existsSchedule({ workspace: ws!, path: path })
		} else if (kind == 'app') {
			return await AppService.existsApp({ workspace: ws!, path: path })
		} else if (kind == 'http_trigger') {
			return await HttpTriggerService.existsHttpTrigger({
				workspace: ws!,
				path: path
			})
		} else if (kind == 'websocket_trigger') {
			return await WebsocketTriggerService.existsWebsocketTrigger({
				workspace: ws!,
				path: path
			})
		} else if (kind == 'kafka_trigger') {
			return await KafkaTriggerService.existsKafkaTrigger({
				workspace: ws!,
				path: path
			})
		} else if (kind == 'postgres_trigger') {
			return await PostgresTriggerService.existsPostgresTrigger({
				workspace: ws!,
				path: path
			})
		} else if (kind == 'nats_trigger') {
			return await NatsTriggerService.existsNatsTrigger({
				workspace: ws!,
				path: path
			})
		} else if (kind === 'mqtt_trigger') {
			return await MqttTriggerService.existsMqttTrigger({
				workspace: ws!,
				path: path
			})
		} else if (kind == 'sqs_trigger') {
			return await SqsTriggerService.existsSqsTrigger({
				workspace: ws!,
				path: path
			})
		} else if (kind === 'gcp_trigger') {
			return await GcpTriggerService.existsGcpTrigger({
				workspace: ws!,
				path: path
			})
		} else if (kind === 'azure_trigger') {
			return await AzureTriggerService.existsAzureTrigger({
				workspace: ws!,
				path: path
			})
		} else if (kind === 'email_trigger') {
			return await EmailTriggerService.existsEmailTrigger({
				workspace: ws!,
				path: path
			})
		} else {
			return false
		}
	}

	function validateName(meta: Meta): boolean {
		if (meta.name == undefined || meta.name == '') {
			error = 'Choose a name'
			return false
		} else if (!/^[\w-]+(\/[\w-]+)*$/.test(meta.name)) {
			error = 'This name is not valid'
			return false
		} else if (meta.owner == '' && meta.ownerKind == 'folder') {
			error = 'Folder needs to be chosen'
			return false
		} else if (meta.owner == '' && meta.ownerKind == 'group') {
			error = 'Group needs to be chosen'
			return false
		} else {
			return true
		}
	}

	async function initPath() {
		await tick()
		if (path != undefined && path != '' && !path?.startsWith('tmp/') && !path?.startsWith('hub/')) {
			meta = pathToMeta(path, hideUser)
			onMetaChange()
			return
		}
		if (initialPath == undefined || initialPath == '' || initialPath?.startsWith('tmp/')) {
			reset()
		} else {
			meta = pathToMeta(initialPath, hideUser)
			onMetaChange()
			path = initialPath
		}
	}

	function setDirty() {
		!dirty && (dirty = true)
	}

	$effect(() => {
		if (
			path !== undefined &&
			path !== '' &&
			initialPath &&
			!initialPath.startsWith('tmp/') &&
			path !== initialPath &&
			!dirty
		) {
			dirty = true
		}
	})

	const openSearchWithPrefilledText: (t?: string) => void = getContext(
		'openSearchWithPrefilledText'
	)

	$effect.pre(() => {
		;[meta?.name, meta?.owner, meta?.ownerKind]
		meta && untrack(() => onMetaChange())
	})
	// Reflect an EXTERNAL `path` change back into `meta` (which drives the
	// owner/name inputs). The effect above is one-way meta→path; without
	// this counterpart, a parent that reassigns `path` — e.g. "Discard"
	// reverting a draft to the deployed value — leaves the inputs showing
	// the stale value until a remount. Guard against a meta↔path loop: skip
	// when `path` already matches what `meta` produces (the meta→path write),
	// and only adopt a derivation that round-trips cleanly (so a malformed
	// path left to `initPath`/`reset` can't oscillate).
	$effect.pre(() => {
		const p = path
		untrack(() => {
			if (p == undefined || p == '' || p.startsWith('tmp/') || p.startsWith('hub/')) return
			if (!meta || metaToPath(meta) === p) return
			const next = pathToMeta(p, hideUser)
			if (metaToPath(next) === p) {
				meta = next
			}
		})
	})
	$effect.pre(() => {
		if (ws && $userStore) {
			untrack(() => {
				loadFolders()
				initPath()
			})
		}
	})
	let displayPathChangedWarning = $derived(
		(['flow', 'script', 'resource', 'variable'] as PathKind[]).includes(kind) &&
			initialPath &&
			initialPath !== path
	)
	let pathUsageInFlowsPromise = $derived(
		(kind == 'script' || kind == 'flow') &&
			ws &&
			initialPath &&
			FlowService.listFlowPathsFromWorkspaceRunnable({
				workspace: ws,
				path: initialPath,
				runnableKind: kind
			})
	)
	let pathUsageInAppsPromise = $derived(
		(kind == 'script' || kind == 'flow') &&
			ws &&
			initialPath &&
			AppService.listAppPathsFromWorkspaceRunnable({
				workspace: ws,
				path: initialPath,
				runnableKind: kind
			})
	)
	let pathUsageInScriptsPromise = $derived(
		kind == 'script' &&
			ws &&
			initialPath &&
			ScriptService.listScriptPathsFromWorkspaceRunnable({
				workspace: ws,
				path: initialPath
			})
	)
</script>

<div>
	<div
		class={twMerge(
			inputBaseClass,
			inputBorderClass({ error: !!error }),
			inputSizeClasses[size],
			'relative flex gap-0 pb-0 mb-1 flex-wrap flex-row items-center',
			disabled && '!bg-surface-disabled cursor-not-allowed border-none'
		)}
	>
		{#if meta != undefined}
			{@const nameDisabled = disabled || disableEditing}
			<!-- svelte-ignore a11y_label_has_associated_control -->
			{#if !hideUser}
				<div class="block">
					<Select
						items={[
							{ value: 'user', label: 'User' },
							{ value: 'folder', label: 'Folder' }
						]}
						RightIcon={ChevronDown}
						transformInputSelectedText={(t) => t.substring(0, 1).toLowerCase()}
						inputClass={twMerge('border-none', disabled && '!bg-transparent')}
						useContentEditable
						bind:value={
							() => meta?.ownerKind,
							(v) => {
								if (!meta || !v) return
								setDirty()
								meta.ownerKind = v
								if (v === 'folder') {
									meta.owner = folders?.[0]?.name ?? ''
								} else {
									// 'group' is unreachable here (Select only offers user/folder)
									// but validateName still accepts it for forward-compat.
									meta.owner = $userStore?.username?.split('@')[0] ?? ''
								}
							}
						}
						disabled={nameDisabled}
					/>
				</div>
			{/if}
			{#if !hideUser}
				<div class="text-sm text-secondary">/</div>
			{/if}
			<div>
				{#if meta.ownerKind === 'user'}
					{@const userOwnerDisabled =
						disabled || !($superadmin || ($userStore?.is_admin ?? false)) || disableEditing}
					<label class="block shrink min-w-0">
						<TextInput
							class={twMerge('!border-none', userOwnerDisabled && '!bg-transparent')}
							{size}
							underlyingInputEl="div"
							bind:value={meta.owner}
							inputProps={{
								placeholder: $userStore?.username ?? '',
								onkeydown: setDirty,
								disabled: userOwnerDisabled
							}}
						/>
					</label>
				{:else if meta.ownerKind === 'folder'}
					<label class="block grow">
						<FolderPicker
							bind:folderName={meta.owner}
							{initialPath}
							{disabled}
							{disableEditing}
							{size}
							{drawerOffset}
							selectInputClass={twMerge('!border-none', disabled && '!bg-transparent')}
						/>
					</label>
				{/if}
			</div>
			<div class="text-sm text-secondary">/</div>
			<label class="block grow mr-3">
				<!-- svelte-ignore a11y_autofocus -->
				<PathNameAutocomplete
					bind:this={inputP}
					bind:value={meta.name}
					prefix={`${meta.ownerKind?.charAt(0) ?? ''}/${meta.owner ?? ''}/`}
					workspace={ws}
					{size}
					{error}
					{autofocus}
					id="path"
					placeholder={namePlaceholder}
					disabled={nameDisabled}
					onkeyup={handleKeyUp}
					textInputClass={twMerge(
						'border-none',
						nameDisabled && '!bg-transparent disabled:!bg-transparent'
					)}
				/>
			</label>
			<Button
				iconOnly
				size="xs2"
				variant="subtle"
				startIcon={{ icon: Copy }}
				title="Copy path"
				wrapperClasses="absolute right-1 top-1/2 -translate-y-1/2"
				on:click={() => copyToClipboard(path)}
			/>
		{/if}
	</div>

	<InputError {error} />

	{#if pathUsageInFlowsPromise || pathUsageInAppsPromise || pathUsageInScriptsPromise}
		{#await Promise.all( [pathUsageInAppsPromise, pathUsageInFlowsPromise, pathUsageInScriptsPromise] ) then [apps, flows, scripts]}
			{#if (apps && apps.length) || (flows && flows.length) || (scripts && scripts.length)}
				<p class="text-xs">
					Used by {localeConcatAnd([
						...(scripts && scripts.length ? [pluralize(scripts.length, 'script')] : []),
						...(flows && flows.length ? [pluralize(flows.length, 'flow')] : []),
						...(apps && apps.length ? [pluralize(apps.length, 'app')] : [])
					])}
					<Tooltip>
						<ul>
							{#each scripts || [] as path}
								<li><a target="_blank" href="/scripts/edit/{path}">{path}</a></li>
							{/each}
							{#each flows || [] as path}
								<li><a target="_blank" href="/flows/edit/{path}">{path}</a></li>
							{/each}
							{#each apps || [] as path}
								<li><a target="_blank" href="/apps/edit/{path}">{path}</a></li>
							{/each}
						</ul>
					</Tooltip>
				</p>
				{#if displayPathChangedWarning}
					<Alert
						type="warning"
						class="mt-4"
						title="Moving this item will break the following referencing it:"
					>
						<ul class="list-disc">
							{#each scripts || [] as scriptPath}
								<li>
									<a href={`/scripts/edit/${scriptPath}`} class="text-blue-400" target="_blank">
										{scriptPath}
									</a>
								</li>
							{/each}
							{#each flows || [] as flowPath}
								<li>
									<a href={`/flows/edit/${flowPath}`} class="text-blue-400" target="_blank">
										{flowPath}
									</a>
								</li>
							{/each}
							{#each apps || [] as appPath}
								<li>
									<a href={`/apps/edit/${appPath}`} class="text-blue-400" target="_blank">
										{appPath}
									</a>
								</li>
							{/each}
						</ul>
					</Alert>
				{/if}
			{/if}
		{/await}
	{:else if displayPathChangedWarning}
		<Alert type="warning" class="mt-4" title="Moving may break other items relying on it">
			You are renaming an item that may be depended upon by other items. This may break apps, flows
			or resources. Find if it used elsewhere using the content search. Note that linked variables
			and resources (having the same path) are automatically moved together.
			<div class="flex pt-2">
				<Button
					variant="default"
					on:click={() => {
						openSearchWithPrefilledText('#')
					}}
					startIcon={{ icon: SearchCode }}
				>
					Search
				</Button>
			</div>
		</Alert>
	{/if}
</div>
