'use client';

import React, { useState } from 'react';
import { Icon } from '@/components/ui/icon';
import { Spinner } from '@/components/ui/spinner';
import { Separator } from '@/components/ui/separator';
import RichTextEditor from './RichTextEditor';
import type { FieldGroup } from './CollectionFieldSelector';
import FileManagerDialog from './FileManagerDialog';
import { sanitizeSlug, checkDuplicatePageSlug, checkDuplicateFolderSlug, type ValidationResult } from '@/lib/page-utils';
import type { TranslatableItem } from '@/lib/localisation-utils';
import type { Translation, CollectionField, Collection, CreateTranslationData, UpdateTranslationData, Page, PageFolder, Asset } from '@/types';
import { useAsset } from '@/hooks/use-asset';
import { getAssetIcon, isAssetOfType, getAssetCategoryFromMimeType, ASSET_CATEGORIES } from '@/lib/asset-utils';
import { buildAssetFolderPath } from '@/lib/asset-folder-utils';
import { useAssetsStore } from '@/stores/useAssetsStore';
import { toast } from 'sonner';
import type { IconProps } from '@/components/ui/icon';
import type { AssetCategory } from '@/types';

interface TranslationRowProps {
  item: TranslatableItem;
  selectedLocaleId: string | null;
  localInputValues: Record<string, string>;
  onLocalValueChange: (key: string, value: string) => void;
  onLocalValueClear: (key: string) => void;
  getTranslationByKey: (localeId: string, key: string) => Translation | undefined;
  createTranslation: (data: CreateTranslationData) => Promise<Translation | null>;
  updateTranslation: (translation: Translation, data: UpdateTranslationData) => Promise<void>;
  updateTranslationValue: (translation: Translation, contentValue: string) => Promise<void>;
  updateTranslationStatus: (translation: Translation, isCompleted: boolean) => Promise<void>;
  deleteTranslation: (translation: Translation) => Promise<void>;
  // Optional: For pages with CMS fields and inline variables support
  fieldGroups?: FieldGroup[];
  allFields?: Record<string, CollectionField[]>;
  collections?: Collection[];
  // For slug validation
  pages?: Page[];
  folders?: PageFolder[];
  sourceItem?: Page | PageFolder;
}

/**
 * Reusable component for rendering a translation row
 * Uses RichTextEditor for consistent styling across all content types
 */
export default function TranslationRow({
  item,
  selectedLocaleId,
  localInputValues,
  onLocalValueChange,
  onLocalValueClear,
  getTranslationByKey,
  createTranslation,
  updateTranslation,
  updateTranslationValue,
  updateTranslationStatus,
  deleteTranslation,
  fieldGroups,
  allFields,
  collections,
  pages = [],
  folders = [],
  sourceItem,
}: TranslationRowProps) {
  const [validationError, setValidationError] = useState<string | null>(null);
  const [isSaving, setIsSaving] = useState(false);
  const [isSavingStatus, setIsSavingStatus] = useState(false);
  const [isAssetPickerOpen, setIsAssetPickerOpen] = useState(false);
  const [pendingCompletions, setPendingCompletions] = useState<Record<string, boolean | null>>({});
  const [isUpdatingCompletion, setIsUpdatingCompletion] = useState(false);

  // Get translation from store
  const translation = selectedLocaleId
    ? getTranslationByKey(selectedLocaleId, item.key)
    : null;
  const storeValue = translation?.content_value || '';

  // Check if this is rich text content (stored as JSON string)
  const isRichText = item.content_type === 'richtext';

  // Parse original value if it's rich text (JSON string → Tiptap JSON)
  let originalValueForEditor: string | any = item.content_value;
  if (isRichText) {
    if (item.content_value && typeof item.content_value === 'string') {
      try {
        originalValueForEditor = JSON.parse(item.content_value);
      } catch (error) {
        // If parsing fails, use empty Tiptap document
        console.error('Failed to parse original value JSON:', error, item.content_value);
        originalValueForEditor = { type: 'doc', content: [{ type: 'paragraph' }] };
      }
    } else if (!item.content_value) {
      // Empty original value - use empty Tiptap document
      originalValueForEditor = { type: 'doc', content: [{ type: 'paragraph' }] };
    }
  }

  // Use local value if available, otherwise use store value
  const translationValue = localInputValues[item.key] !== undefined
    ? localInputValues[item.key]
    : storeValue;

  // For rich text, parse JSON string to Tiptap JSON object for RichTextEditor
  let translationValueForEditor: string | any = translationValue;
  if (isRichText) {
    if (translationValue && typeof translationValue === 'string') {
      try {
        translationValueForEditor = JSON.parse(translationValue);
      } catch (error) {
        // If parsing fails, use empty Tiptap document
        console.error('Failed to parse translation JSON:', error, translationValue);
        translationValueForEditor = { type: 'doc', content: [{ type: 'paragraph' }] };
      }
    } else if (!translationValue) {
      // Empty translation - use empty Tiptap document structure
      translationValueForEditor = { type: 'doc', content: [{ type: 'paragraph' }] };
    }
  }

  // Check if this is an asset
  const isAsset = item.content_type === 'asset_id';

  // Get asset data for display
  const sourceAsset = useAsset(isAsset ? item.content_value : null);
  const translatedAsset = useAsset(isAsset ? translationValue : null);

  // Determine which asset to display (translated if exists, otherwise source)
  // In asset translation context, we always have at least sourceAsset
  const displayedAsset = translatedAsset || sourceAsset;

  // Get asset category from source asset for filtering
  const assetCategory: AssetCategory | null = sourceAsset
    ? getAssetCategoryFromMimeType(sourceAsset.mime_type)
    : null;

  // Get asset folders from assets store for building folder paths
  const assetFolders = useAssetsStore((state) => state.folders);

  // Check if this is a slug field (supports both old 'slug' format and new 'field:key:slug' format)
  const isSlugField = item.content_key === 'slug' || item.content_key === 'field:key:slug';

  // Update local state on change (immediate UI feedback)
  const handleTranslationChange = (value: string | any) => {
    let processedValue = value;

    // For rich text, stringify Tiptap JSON object to store as string
    if (isRichText && typeof value === 'object') {
      processedValue = JSON.stringify(value);
    } else if (isSlugField && typeof value === 'string') {
      // Slugify if this is a slug field
      processedValue = sanitizeSlug(value, true); // Allow trailing dash for better UX while typing
    }

    onLocalValueChange(item.key, processedValue);

    // Clear validation error when user starts typing
    if (validationError) {
      setValidationError(null);
    }
  };

  // Save to store/API on blur (optimistic update + API call)
  const handleTranslationBlur = (value: string | any) => {
    if (!selectedLocaleId) return;

    let finalValue = value;

    // For rich text, stringify Tiptap JSON object to store as string
    if (isRichText && typeof value === 'object') {
      finalValue = JSON.stringify(value);
    } else if (isSlugField && typeof value === 'string') {
      // Slugify and validate if this is a slug field
      // Finalize slug (remove trailing dashes)
      finalValue = sanitizeSlug(value, false);

      // Validate slug uniqueness
      if (finalValue && sourceItem) {
        let validationResult: ValidationResult = { isValid: true };

        if (item.source_type === 'page') {
          const page = sourceItem as Page;
          validationResult = checkDuplicatePageSlug(
            finalValue,
            pages,
            page.page_folder_id,
            page.is_published,
            page.id
          );
        } else if (item.source_type === 'folder') {
          const folder = sourceItem as PageFolder;
          validationResult = checkDuplicateFolderSlug(
            finalValue,
            folders,
            folder.page_folder_id,
            folder.id
          );
        }

        if (!validationResult.isValid) {
          setValidationError(validationResult.error || 'This slug is already in use');
          // Update local value to show the finalized slug
          onLocalValueChange(item.key, finalValue);
          return; // Don't save if validation fails
        }
      }

      // Update local value to show the finalized slug
      if (finalValue !== value) {
        onLocalValueChange(item.key, finalValue);
      }
    }

    // Clear local value (will use store value after save)
    onLocalValueClear(item.key);

    // Only save if the value actually changed
    if (finalValue === storeValue) {
      return;
    }

    const translationData: CreateTranslationData = {
      locale_id: selectedLocaleId,
      source_type: item.source_type as CreateTranslationData['source_type'],
      source_id: item.source_id,
      content_key: item.content_key,
      content_type: item.content_type as CreateTranslationData['content_type'],
      content_value: finalValue,
    };

    setIsSaving(true);

    const savePromise = translation
      ? updateTranslationValue(translation, finalValue)
      : (() => {
        // Start the creation (which creates optimistic translation synchronously)
        const creationPromise = createTranslation(translationData);

        // Capture temp-id after optimistic translation is created
        const tempTranslation = getTranslationByKey(selectedLocaleId, item.key);
        const tempId = tempTranslation?.id.startsWith('temp-') ? tempTranslation.id : null;

        if (tempId) {
          // Track temp-id with null (no pending completion update)
          setPendingCompletions((prev) => ({
            ...prev,
            [tempId]: null,
          }));
        }

        return creationPromise.then((newTranslation) => {
          if (!newTranslation || !tempId) return;

          // Read the desired completion value and remove from pending list
          let desiredCompletion: boolean | null | undefined;
          setPendingCompletions((prev) => {
            desiredCompletion = prev[tempId];
            const next = { ...prev };
            delete next[tempId];
            return next;
          });

          // Fire update outside of state setter to avoid render issues
          if (desiredCompletion !== null && desiredCompletion !== undefined) {
            setTimeout(() => {
              setIsUpdatingCompletion(true);
              updateTranslationStatus(newTranslation, desiredCompletion!)
                .catch((error) => {
                  console.error('Failed to update completion status after creation:', error);
                })
                .finally(() => {
                  setIsUpdatingCompletion(false);
                });
            }, 0);
          }
        });
      })();

    savePromise
      .catch((error) => {
        console.error('Failed to save translation:', error);
      })
      .finally(() => {
        setIsSaving(false);
      });
  };

  // Reset translation
  const handleReset = () => {
    if (!selectedLocaleId) return;
    const translation = getTranslationByKey(selectedLocaleId, item.key);
    if (translation) {
      deleteTranslation(translation);
    }
  };

  // Toggle completed status
  const handleToggleCompleted = () => {
    if (!selectedLocaleId || isUpdatingCompletion) return;

    const translation = getTranslationByKey(selectedLocaleId, item.key);

    // Fire and forget - don't block UI
    if (translation) {
      // Check if this translation is pending creation
      if (translation.id.startsWith('temp-') && pendingCompletions[translation.id] !== undefined) {
        // Translation is being created - just update the pending completion value
        setPendingCompletions((prev) => ({
          ...prev,
          [translation.id]: !translation.is_completed,
        }));
        return;
      }

      // Translation exists with real ID - toggle completion status
      if (!translation.id.startsWith('temp-')) {
        setIsUpdatingCompletion(true);
        updateTranslationStatus(translation, !translation.is_completed)
          .catch((error) => {
            console.error('Failed to toggle completion status:', error);
          })
          .finally(() => {
            setIsUpdatingCompletion(false);
          });
      }
    } else {
      // Check if there's a translation being created (has temp-id)
      const tempTranslation = getTranslationByKey(selectedLocaleId, item.key);
      const hasPendingCreation = tempTranslation?.id.startsWith('temp-');

      if (hasPendingCreation && tempTranslation) {
        // Translation is being created - track completion for when it's created
        const tempId = tempTranslation.id;
        setPendingCompletions((prev) => ({
          ...prev,
          [tempId]: true,
        }));
        return;
      }

      // No pending creation - create translation with is_completed in single query
      const translationData: CreateTranslationData = {
        locale_id: selectedLocaleId,
        source_type: item.source_type as CreateTranslationData['source_type'],
        source_id: item.source_id,
        content_key: item.content_key,
        content_type: item.content_type as CreateTranslationData['content_type'],
        content_value: '', // Empty string means "use original"
        is_completed: true, // Set completion status directly
      };

      setIsUpdatingCompletion(true);
      createTranslation(translationData)
        .catch((error) => {
          console.error('Failed to create translation:', error);
        })
        .finally(() => {
          setIsUpdatingCompletion(false);
        });
    }
  };

  // Handle asset selection
  const handleAssetSelect = (asset: Asset): void | false => {
    if (!selectedLocaleId) return false;

    // Validate asset type matches source asset category
    if (assetCategory && asset.mime_type) {
      if (!isAssetOfType(asset.mime_type, assetCategory)) {
        const categoryLabels: Record<AssetCategory, string> = {
          images: 'an image',
          videos: 'a video',
          audio: 'an audio file',
          icons: 'an icon',
          documents: 'a document',
        };

        const expectedType = categoryLabels[assetCategory] || 'file with the correct type';

        toast.error('Invalid asset type', {
          description: `Please select ${expectedType}.`,
        });

        return false; // Don't close file manager
      }
    }

    // Update local value with asset ID
    onLocalValueChange(item.key, asset.id);

    // Save immediately
    const translationData: CreateTranslationData = {
      locale_id: selectedLocaleId,
      source_type: item.source_type as CreateTranslationData['source_type'],
      source_id: item.source_id,
      content_key: item.content_key,
      content_type: item.content_type as CreateTranslationData['content_type'],
      content_value: asset.id,
    };

    setIsSaving(true);

    const savePromise = translation
      ? updateTranslationValue(translation, asset.id)
      : createTranslation(translationData);

    savePromise
      .catch((error) => {
        console.error('Failed to save asset translation:', error);
      })
      .finally(() => {
        setIsSaving(false);
        setIsAssetPickerOpen(false);
      });
  };

  // Get folder path for an asset
  const getAssetFolderPath = (asset: Asset | null): string | null => {
    if (!asset) {
      return null;
    }

    // If asset has no folder, show "All files" as root
    if (!asset.asset_folder_id) {
      return 'All files';
    }

    const folder = assetFolders.find((f) => f.id === asset.asset_folder_id);
    if (!folder) {
      return 'All files';
    }

    // Build folder path and prepend "All files / "
    const folderPath = buildAssetFolderPath(folder, assetFolders) as string;
    return `All files / ${folderPath}`;
  };

  // Render asset preview based on type
  const renderAssetPreview = (asset: Asset) => {
    const isIcon = asset.content && isAssetOfType(asset.mime_type, ASSET_CATEGORIES.ICONS);
    const isVideo = isAssetOfType(asset.mime_type, ASSET_CATEGORIES.VIDEOS);
    const isAudio = isAssetOfType(asset.mime_type, ASSET_CATEGORIES.AUDIO);
    const isImage = isAssetOfType(asset.mime_type, ASSET_CATEGORIES.IMAGES) && !isIcon;
    const folderPath = getAssetFolderPath(asset);

    const showCheckerboard = isIcon || isImage;

    return (
      <>
        <div className={`size-8 rounded overflow-hidden flex-shrink-0 flex items-center justify-center relative`}>
          {/* Checkerboard pattern for transparency - only for images and icons */}
          {showCheckerboard
            ? <div className="absolute inset-0 opacity-10 bg-checkerboard" />
            : <div className="absolute inset-0 bg-secondary" />
          }
          {isIcon && asset.content ? (
            // Render SVG icon content
            <div
              data-icon="true"
              className="relative w-full h-full flex items-center justify-center text-foreground p-1 z-10"
              dangerouslySetInnerHTML={{ __html: asset.content }}
            />
          ) : isVideo || isAudio ? (
            // Show icon for video/audio
            <Icon name={getAssetIcon(asset.mime_type) as IconProps['name']} className="size-4 opacity-50 relative z-10" />
          ) : isImage && asset.public_url ? (
            // eslint-disable-next-line @next/next/no-img-element
            <img
              src={asset.public_url}
              alt={asset.filename}
              className="relative w-full h-full object-cover z-10"
            />
          ) : (
            // Fallback icon
            <Icon name={getAssetIcon(asset.mime_type) as IconProps['name']} className="size-4 opacity-50 relative z-10" />
          )}
        </div>

        <div className="flex flex-col min-w-0 flex-1">
          <span className="text-xs truncate text-foreground/80">{asset.filename}</span>
          {folderPath && (
            <span className="text-[11px] text-muted-foreground/70 truncate">{folderPath}</span>
          )}
        </div>
      </>
    );
  };

  return (
    <li key={item.key} className="flex flex-col gap-1.5">
      {/* Item header */}
      <div className="flex items-center gap-1.75">
        <div className="size-5 flex items-center justify-center rounded-[6px] bg-secondary/50">
          <Icon name={item.info.icon} className="shrink-0 size-2.5 opacity-50" />
        </div>

        <span className="text-xs font-medium opacity-60">{item.info.label}</span>

        {item.info.description && (
          <>
            <Separator className="w-3! bg-foreground/8" />
            <div className="text-[11px] text-muted-foreground/70">{item.info.description}</div>
          </>
        )}

        <Separator className="min-w-0 flex-1 bg-foreground/8" />

        {/* Action buttons */}
        <div className="flex items-center gap-1.5">
          <button
            onClick={handleToggleCompleted}
            disabled={isUpdatingCompletion}
            className={`flex items-center justify-center pl-2 pr-2.5 py-0.75 gap-1.25 rounded-sm transition-colors cursor-pointer ${translation?.is_completed === true ? 'bg-green-400/6' : 'bg-secondary/50'} disabled:opacity-50 disabled:cursor-not-allowed`}
            title={isUpdatingCompletion ? 'Updating...' : (translation?.is_completed === true ? 'Mark as not completed' : 'Mark as completed')}
          >
            {isSavingStatus ? (
              <Spinner className="size-3 text-muted-foreground/50" />
            ) : translation?.is_completed === true ? (
              <Icon name="check" className="size-3 text-green-600 dark:text-green-400" />
            ) : (
              <Icon name="block" className="size-2.25 text-muted-foreground/50" />
            )}

            <span className="text-[10px] uppercase font-medium text-muted-foreground">{translation?.is_completed === true ? 'Done' : 'To do'}</span>
          </button>
        </div>
      </div>

      <div className="flex items-center gap-2">
        <div className="w-full grid grid-cols-2 gap-2">
          {/* Left side (default locale value, read-only) */}
          {isAsset && sourceAsset ? (
            <div className="flex items-center gap-2 p-2 border border-border/50 rounded-md bg-secondary/20 opacity-80">
              {renderAssetPreview(sourceAsset)}
            </div>
          ) : (
            <div className="text-sm opacity-50">
              <RichTextEditor
                value={originalValueForEditor}
                onChange={() => {}} // Read-only on left side
                placeholder=""
                fieldGroups={fieldGroups}
                allFields={allFields}
                collections={collections}
                disabled={true}
                withFormatting={isRichText}
              />
            </div>
          )}

          {/* Right side (translation value, editable) */}
          <div className="flex flex-col gap-1">
            {isAsset ? (
              <div
                className="flex items-center gap-2 p-2 border border-border/50 rounded-md bg-secondary/20 cursor-pointer hover:bg-secondary/35 transition-colors"
                onClick={() => setIsAssetPickerOpen(true)}
              >
                {displayedAsset && (
                  <>
                    {renderAssetPreview(displayedAsset)}
                  </>
                )}
              </div>
            ) : (
              <RichTextEditor
                value={translationValueForEditor}
                onChange={handleTranslationChange}
                onBlur={handleTranslationBlur}
                placeholder={
                  translation?.is_completed === true
                    ? '(Using original)'
                    : (isRichText ? 'Enter translation...' : (item.content_value || 'Enter translation...'))
                }
                className={`min-h-[28px] [&_.ProseMirror]:py-1 [&_.ProseMirror]:px-2.5 [&_.ProseMirror]:!bg-transparent ${
                  validationError ? '[&_.ProseMirror]:!border-destructive' : ''
                }`}
                fieldGroups={fieldGroups}
                allFields={allFields}
                collections={collections}
                withFormatting={isRichText}
              />
            )}
            {validationError && (
              <span className="text-[11px] text-destructive">{validationError}</span>
            )}
          </div>
        </div>
      </div>

      {/* Asset Picker Dialog */}
      {isAsset && (
        <FileManagerDialog
          open={isAssetPickerOpen}
          onOpenChange={setIsAssetPickerOpen}
          onAssetSelect={handleAssetSelect}
          assetId={translationValue || item.content_value || null}
          category={assetCategory || undefined}
        />
      )}
    </li>
  );
}
