import { invoke } from '@tauri-apps/api/core'
import { appDataDir, join } from '@tauri-apps/api/path'
import { exists, readDir, readTextFile, remove } from '@tauri-apps/plugin-fs'
import { and, eq } from 'drizzle-orm'
import type {
  IHaexHubExtension,
  IHaexHubExtensionLink,
  IHaexHubExtensionManifest,
} from '~/types/haexhub'
import { haexExtensions } from '~~/src-tauri/database/schemas/vault'

const manifestFileName = 'manifest.json'
const logoFileName = 'icon.svg'

export const useExtensionsStore = defineStore('extensionsStore', () => {
  const availableExtensions = ref<IHaexHubExtensionLink[]>([])
  const { addNotificationAsync } = useNotificationStore()

  const extensionLinks = computed<ISidebarItem[]>(() =>
    availableExtensions.value
      .filter((extension) => extension.enabled && extension.installed)
      .map((extension) => ({
        icon: extension.icon ?? '',
        id: extension.id,
        name: extension.name ?? '',
        tooltip: extension.name ?? '',
        to: { name: 'haexExtension', params: { extensionId: extension.id } },
      })),
  )

  const currentRoute = useRouter().currentRoute

  const isActive = (id: string) =>
    computed(
      () =>
        currentRoute.value.name === 'extension' &&
        currentRoute.value.params.extensionId === id,
    )

  const currentExtension = computed(() => {
    console.log('computed currentExtension', currentRoute.value.params)
    if (currentRoute.value.meta.name !== 'haexExtension') return

    const extensionId = getSingleRouteParam(
      currentRoute.value.params.extensionId,
    )
    console.log('extensionId from param', extensionId)
    if (!extensionId) return

    const extension = availableExtensions.value.find(
      (extension) => extension.id === extensionId,
    )
    console.log('currentExtension', extension)
    return extension
  })

  const getExtensionPathAsync = async (
    extensionId?: string,
    version?: string,
  ) => {
    if (!extensionId || !version) return ''
    return await join(await appDataDir(), 'extensions', extensionId, version)
  }

  const checkSourceExtensionDirectoryAsync = async (
    extensionDirectory: string,
  ) => {
    try {
      const dir = await readDir(extensionDirectory)
      const manifest = dir.find(
        (entry) => entry.name === manifestFileName && entry.isFile,
      )
      if (!manifest) throw new Error('Kein Manifest für Erweiterung gefunden')

      const logo = dir.find((item) => item.isFile && item.name === logoFileName)
      if (!logo) throw new Error('Logo fehlt')
      console.log('found icon', logo)

      return true
    } catch (error) {
      console.error(error)
      addNotificationAsync({ type: 'error', text: JSON.stringify(error) })
      //throw error //new Error(`Keine Leseberechtigung für Ordner ${extensionDirectory}`);
    }
  }

  const isExtensionInstalledAsync = async (
    extension: Partial<IHaexHubExtension>,
  ) => {
    try {
      const extensionPath = await getExtensionPathAsync(
        extension.id,
        `${extension.version}`,
      )
      console.log(
        `extension ${extension.id} is installed ${await exists(extensionPath)}`,
      )
      return await exists(extensionPath)
    } catch (error) {
      console.error(error)
      return false
    }
  }

  const checkManifest = (
    manifestFile: unknown,
  ): manifestFile is IHaexHubExtensionManifest => {
    const errors = []

    if (typeof manifestFile !== 'object' || manifestFile === null) {
      errors.push('Manifest ist falsch')
      return false
    }

    if (!('id' in manifestFile) || typeof manifestFile.id !== 'string')
      errors.push('Keine ID vergeben')

    if (!('name' in manifestFile) || typeof manifestFile.name !== 'string')
      errors.push('Name fehlt')

    if (!('entry' in manifestFile) || typeof manifestFile.entry !== 'string')
      errors.push('Entry fehlerhaft')

    if (!('author' in manifestFile) || typeof manifestFile.author !== 'string')
      errors.push('Author fehlt')

    if (!('url' in manifestFile) || typeof manifestFile.url !== 'string')
      errors.push('Url fehlt')

    if (
      !('version' in manifestFile) ||
      typeof manifestFile.version !== 'string'
    )
      errors.push('Version fehlt')

    if (
      !('permissions' in manifestFile) ||
      typeof manifestFile.permissions !== 'object' ||
      manifestFile.permissions === null
    ) {
      errors.push('Berechtigungen fehlen')
    }

    if (errors.length) throw errors

    /* const permissions = manifestFile.permissions as Partial<IHaexHubExtensionManifest["permissions"]>;
    if (
      ("database" in permissions &&
        (typeof permissions.database !== "object" || permissions.database === null)) ||
      ("filesystem" in permissions && typeof permissions.filesystem !== "object") ||
      permissions.filesystem === null
    ) {
      return false;
    } */

    return true
  }

  const readManifestFileAsync = async (
    extensionId: string,
    version: string,
  ) => {
    try {
      if (!(await isExtensionInstalledAsync({ id: extensionId, version })))
        return null

      const extensionPath = await getExtensionPathAsync(
        extensionId,
        `${version}`,
      )
      const manifestPath = await join(extensionPath, manifestFileName)
      const manifest = (await JSON.parse(
        await readTextFile(manifestPath),
      )) as IHaexHubExtensionManifest

      /*
      TODO implement check, that manifest has valid data
      */
      return manifest
    } catch (error) {
      addNotificationAsync({ type: 'error', text: JSON.stringify(error) })
      console.error('ERROR readManifestFileAsync', error)
    }
  }

  const installAsync = async (extensionDirectory: string | null) => {
    try {
      if (!extensionDirectory)
        throw new Error('Kein Ordner für Erweiterung angegeben')
      const manifestPath = await join(extensionDirectory, manifestFileName)
      const manifest = (await JSON.parse(
        await readTextFile(manifestPath),
      )) as IHaexHubExtensionManifest

      const destination = await getExtensionPathAsync(
        manifest.id,
        manifest.version,
      )

      await checkSourceExtensionDirectoryAsync(extensionDirectory)

      await invoke('copy_directory', {
        source: extensionDirectory,
        destination,
      })

      const logoFilePath = await join(destination, logoFileName)
      const logo = await readTextFile(logoFilePath)

      const { currentVault } = storeToRefs(useVaultStore())
      const res = await currentVault.value?.drizzle
        .insert(haexExtensions)
        .values({
          id: manifest.id,
          name: manifest.name,
          author: manifest.author,
          enabled: true,
          url: manifest.url,
          version: manifest.version,
          icon: logo,
        })

      console.log('insert extensions', res)
      addNotificationAsync({
        type: 'success',
        text: `${manifest.name} wurde installiert`,
      })
    } catch (error) {
      addNotificationAsync({ type: 'error', text: JSON.stringify(error) })
      throw error
      /*
      const resourcePath = await resourceDir();
      //const manifestPath = await join(extensionDirectory, 'manifest.json');
      const manifestPath = await join(
        resourcePath,
        'extension',
        'demo-addon',
        'manifest.json'
      );
      const regex = /((href|src)=["'])([^"']+)(["'])/g;
      let htmlContent = await readTextFile(
        await join(resourcePath, 'extension', 'demo-addon', 'index.html')
      );

      const replacements = [];
      let match;
      while ((match = regex.exec(htmlContent)) !== null) {
        const [fullMatch, prefix, attr, resource, suffix] = match;
        if (!resource.startsWith('http')) {
          replacements.push({ match: fullMatch, resource, prefix, suffix });
        }
      }

      for (const { match, resource, prefix, suffix } of replacements) {
             const fileContent = await readTextFile(
          await join(resourcePath, 'extension', 'demo-addon', resource)
        );
        const blob = new Blob([fileContent], { type: getMimeType(resource) });
        const blobUrl = URL.createObjectURL(blob);
        console.log('blob', resource, blobUrl);
        htmlContent = htmlContent.replace(
          match,
          `${prefix}${blobUrl}${suffix}`
        );
      }

      console.log('htmlContent', htmlContent);

      const blob = new Blob([htmlContent], { type: 'text/html' });
      const iframeSrc = URL.createObjectURL(blob);

      const manifestContent = await readTextFile(manifestPath);
      console.log('iframeSrc', iframeSrc);
      const manifest: PluginManifest = JSON.parse(manifestContent);
      //const entryPath = await join(extensionDirectory, manifest.entry);
      const entryPath = await join(
        resourcePath,
        'extension',
        'demo-addon',
        manifest.entry
      );
      console.log('extensionDirectory', extensionDirectory, entryPath);
      const path = convertFileSrc(extensionDirectory, manifest.entry);
      console.log('final path', path);
      manifest.entry = iframeSrc;
      /* await join(
        path, //`file:/${extensionDirectory}`,
        manifest.entry
      ); */
      // Modul-Datei laden
      //const modulePathFull = await join(basePath, manifest.main);
      /* const manifest: PluginManifest = await invoke('load_plugin', {
        manifestPath,
      }); */
      /* const iframe = document.createElement('iframe');
      iframe.src = manifest.entry;
      iframe.setAttribute('sandbox', 'allow-scripts');
      iframe.style.width = '100%';
      iframe.style.height = '100%';
      iframe.style.border = 'none'; */
      /* const addonApi = {
        db_execute: async (sql: string, params: string[] = []) => {
          return invoke('db_execute', {
            addonId: manifest.name,
            sql,
            params,
          });
        },
        db_select: async (sql: string, params: string[] = []) => {
          return invoke('db_select', {
            addonId: manifest.name,
            sql,
            params,
          });
        },
      }; */
      /* iframe.onload = () => {
        iframe.contentWindow?.postMessage(
          { type: 'init', payload: addonApi },
          '*'
        );
      };

      window.addEventListener('message', (event) => {
        if (event.source === iframe.contentWindow) {
          const { type } = event.data;
          if (type === 'ready') {
            console.log(`Plugin ${manifest.name} ist bereit`);
          }
        }
      }); */
      /* plugins.value.push({ name: manifest.name, entry: manifest.entry });

        console.log(`Plugin ${manifest.name} geladen.`); */
    }
  }

  const extensionEntry = computedAsync(
    async () => {
      try {
        /* console.log("extensionEntry start", currentExtension.value);
        const regex = /((href|src)=["'])([^"']+)(["'])/g; */

        if (!currentExtension.value?.id || !currentExtension.value.version) {
          console.log('extension id or entry missing', currentExtension.value)
          return '' // "no mani: " + currentExtension.value;
        }

        const extensionPath = await getExtensionPathAsync(
          currentExtension.value?.id,
          currentExtension.value?.version,
        ) //await join(await resourceDir(), currentExtension.value.. extensionDir, entryFileName);

        console.log('extensionEntry extensionPath', extensionPath)
        const manifest = await readManifestFileAsync(
          currentExtension.value.id,
          currentExtension.value.version,
        )

        if (!manifest) return '' //"no manifest readable";

        //const entryPath = await join(extensionPath, manifest.entry)

        const hexName = stringToHex(
          JSON.stringify({
            id: currentExtension.value.id,
            version: currentExtension.value.version,
          }),
        )

        return `haex-extension://${hexName}`
      } catch (error) {
        console.error('ERROR extensionEntry', error)
      }
    },
    null,
    { lazy: true },
  )

  const loadExtensionsAsync = async () => {
    const { currentVault } = storeToRefs(useVaultStore())

    const extensions =
      (await currentVault.value?.drizzle.select().from(haexExtensions)) ?? []

    //if (!extensions?.length) return false;

    const installedExtensions = await filterAsync(
      extensions,
      isExtensionInstalledAsync,
    )
    console.log('loadExtensionsAsync installedExtensions', installedExtensions)

    availableExtensions.value =
      extensions.map((extension) => ({
        id: extension.id,
        name: extension.name ?? '',
        icon: extension.icon ?? '',
        author: extension.author ?? '',
        version: extension.version ?? '',
        enabled: extension.enabled ? true : false,
        installed: installedExtensions.includes(extension),
      })) ?? []

    console.log('loadExtensionsAsync', availableExtensions.value)
    return true
  }

  const removeExtensionAsync = async (id: string, version: string) => {
    try {
      console.log('remove extension', id, version)
      await removeExtensionFromVaultAsync(id, version)
      await removeExtensionFilesAsync(id, version)
    } catch (error) {
      throw new Error(JSON.stringify(error))
    }
  }

  return {
    availableExtensions,
    checkManifest,
    currentExtension,
    extensionEntry,
    extensionLinks,
    installAsync,
    isActive,
    isExtensionInstalledAsync,
    loadExtensionsAsync,
    readManifestFileAsync,
    removeExtensionAsync,
    getExtensionPathAsync,
  }
})

/* const getMimeType = (file: string) => {
  if (file.endsWith('.css')) return 'text/css'
  if (file.endsWith('.js')) return 'text/javascript'
  return 'text/plain'
} */

const removeExtensionFromVaultAsync = async (
  id: string | null,
  version: string | null,
) => {
  if (!id)
    throw new Error(
      'Erweiterung kann nicht gelöscht werden. Es keine ID angegeben',
    )

  if (!version)
    throw new Error(
      'Erweiterung kann nicht gelöscht werden. Es wurde keine Version angegeben',
    )

  const { currentVault } = useVaultStore()
  const removedExtensions = await currentVault?.drizzle
    .delete(haexExtensions)
    .where(and(eq(haexExtensions.id, id), eq(haexExtensions.version, version)))
  return removedExtensions
}

const removeExtensionFilesAsync = async (
  id: string | null,
  version: string | null,
) => {
  try {
    const { getExtensionPathAsync } = useExtensionsStore()
    if (!id)
      throw new Error(
        'Erweiterung kann nicht gelöscht werden. Es keine ID angegeben',
      )

    if (!version)
      throw new Error(
        'Erweiterung kann nicht gelöscht werden. Es wurde keine Version angegeben',
      )

    const extensionDirectory = await getExtensionPathAsync(id, version)
    await remove(extensionDirectory, {
      recursive: true,
    })
  } catch (error) {
    console.error('ERROR removeExtensionFilesAsync', error)
    throw new Error(JSON.stringify(error))
  }
}