import { useEffect, useState } from 'react'
import { categoriesApi } from '@/api/categories'
import { useTreeEditorStore } from '@/store/treeEditorStore'
import { TagInput } from '@/components/common/TagInput'
import type { CategoryListItem } from '@/types'
import { cn } from '@/lib/utils'
import { Globe, Lock } from 'lucide-react'

export function TreeMetadataForm() {
  const {
    name,
    description,
    category,
    categoryId,
    tags,
    isPublic,
    setName,
    setDescription,
    setCategory,
    setCategoryId,
    setTags,
    setIsPublic,
    validationErrors,
  } = useTreeEditorStore()

  const [categories, setCategories] = useState<CategoryListItem[]>([])
  const [customCategory, setCustomCategory] = useState(false)

  // Load categories
  useEffect(() => {
    categoriesApi.list().then(setCategories).catch(console.error)
  }, [])

  const handleCategoryChange = (value: string) => {
    if (value === '__custom__') {
      setCustomCategory(true)
      setCategory('')
      setCategoryId(null)
    } else if (value === '') {
      setCustomCategory(false)
      setCategory('')
      setCategoryId(null)
    } else {
      setCustomCategory(false)
      setCategoryId(value)
      // Find category name for display
      const cat = categories.find((c) => c.id === value)
      if (cat) {
        setCategory(cat.name)
      }
    }
  }

  const nameError = validationErrors.find(
    (e) => !e.nodeId && e.message.toLowerCase().includes('name')
  )

  return (
    <div className="space-y-4 bg-card border border-border rounded-2xl p-4">
      <h2 className="text-sm font-semibold text-foreground">Tree Details</h2>

      {/* Name */}
      <div>
        <label htmlFor="tree-name" className="block text-sm font-medium text-foreground">
          Name <span className="text-red-400">*</span>
        </label>
        <input
          id="tree-name"
          type="text"
          value={name}
          onChange={(e) => setName(e.target.value)}
          placeholder="e.g., VDA Registration Troubleshooting"
          className={cn(
            'mt-1 block w-full rounded-md border px-3 py-2 text-sm',
            'bg-card text-foreground placeholder:text-muted-foreground',
            'focus:border-primary focus:outline-none focus:ring-1 focus:ring-primary/20',
            nameError ? 'border-red-400' : 'border-border'
          )}
        />
        {nameError && <p className="mt-1 text-xs text-red-400">{nameError.message}</p>}
      </div>

      {/* Description */}
      <div>
        <label htmlFor="tree-description" className="block text-sm font-medium text-foreground">
          Description
        </label>
        <textarea
          id="tree-description"
          value={description}
          onChange={(e) => setDescription(e.target.value)}
          placeholder="Brief description of what this tree troubleshoots..."
          rows={2}
          className={cn(
            'mt-1 block w-full rounded-md border border-border px-3 py-2 text-sm',
            'bg-card text-foreground placeholder:text-muted-foreground',
            'focus:border-primary focus:outline-none focus:ring-1 focus:ring-primary/20'
          )}
        />
      </div>

      {/* Category */}
      <div>
        <label htmlFor="tree-category" className="block text-sm font-medium text-foreground">
          Category
        </label>
        {!customCategory ? (
          <select
            id="tree-category"
            value={categoryId || ''}
            onChange={(e) => handleCategoryChange(e.target.value)}
            className={cn(
              'mt-1 block w-full rounded-md border border-border px-3 py-2 text-sm',
              'bg-card text-foreground',
              'focus:border-primary focus:outline-none focus:ring-1 focus:ring-primary/20'
            )}
          >
            <option value="">No category</option>
            {categories.map((cat) => (
              <option key={cat.id} value={cat.id}>
                {cat.name}
                {cat.account_id ? ' (Account)' : ''}
              </option>
            ))}
            <option value="__custom__">+ Add custom category</option>
          </select>
        ) : (
          <div className="mt-1 flex gap-2">
            <input
              type="text"
              value={category}
              onChange={(e) => setCategory(e.target.value)}
              placeholder="Enter new category"
              className={cn(
                'block min-w-0 flex-1 rounded-md border border-border px-3 py-2 text-sm',
                'bg-card text-foreground placeholder:text-muted-foreground',
                'focus:border-primary focus:outline-none focus:ring-1 focus:ring-primary/20'
              )}
              autoFocus
            />
            <button
              type="button"
              onClick={() => {
                setCustomCategory(false)
                setCategory('')
                setCategoryId(null)
              }}
              className="shrink-0 rounded-md border border-border px-2.5 py-2 text-xs text-muted-foreground hover:bg-accent hover:text-foreground"
            >
              Cancel
            </button>
          </div>
        )}
      </div>

      {/* Tags */}
      <div>
        <label className="block text-sm font-medium text-foreground">Tags</label>
        <div className="mt-1">
          <TagInput tags={tags} onChange={setTags} maxTags={10} placeholder="Add tags..." />
        </div>
      </div>

      {/* Visibility */}
      <div>
        <label className="block text-sm font-medium text-foreground">Visibility</label>
        <div className="mt-2 flex gap-4">
          <label
            className={cn(
              'flex cursor-pointer items-center gap-2 rounded-md border px-4 py-2',
              'transition-colors',
              !isPublic ? 'border-primary/30 bg-accent text-foreground' : 'border-border text-muted-foreground hover:bg-accent/50'
            )}
          >
            <input
              type="radio"
              name="visibility"
              checked={!isPublic}
              onChange={() => setIsPublic(false)}
              className="sr-only"
            />
            <Lock className="h-4 w-4" />
            <span className="text-sm">Private</span>
          </label>
          <label
            className={cn(
              'flex cursor-pointer items-center gap-2 rounded-md border px-4 py-2',
              'transition-colors',
              isPublic ? 'border-primary/30 bg-accent text-foreground' : 'border-border text-muted-foreground hover:bg-accent/50'
            )}
          >
            <input
              type="radio"
              name="visibility"
              checked={isPublic}
              onChange={() => setIsPublic(true)}
              className="sr-only"
            />
            <Globe className="h-4 w-4" />
            <span className="text-sm">Public</span>
          </label>
        </div>
        <p className="mt-1 text-xs text-muted-foreground">
          {isPublic
            ? 'Anyone can view this tree'
            : 'Only you and your team can view this tree'}
        </p>
      </div>
    </div>
  )
}

export default TreeMetadataForm
