/**
 * Database Model Template
 *
 * Usage: Copy this file to create new database models
 * 1. Replace TEMPLATE_NAME with your model name
 * 2. Define the Zod schema for validation
 * 3. Create the Mongoose schema
 * 4. Add methods and statics as needed
 */

import mongoose, { Document, Model } from 'mongoose'
import { z } from 'zod'

// Zod schema for validation
export const TemplateSchema = z.object({
  // Define your fields here
  name: z.string().min(1, 'Name is required').max(100, 'Name too long'),
  description: z.string().optional(),
  category: z.enum(['type1', 'type2', 'type3']).default('type1'),
  tags: z.array(z.string()).optional(),
  isActive: z.boolean().optional().default(true),
  metadata: z.record(z.string(), z.any()).optional(),

  // Relationships
  userId: z.string().min(1, 'User ID is required'),
  parentId: z.string().optional(),

  // Nested objects
  settings: z
    .object({
      visibility: z.enum(['public', 'private', 'unlisted']).default('public'),
      allowComments: z.boolean().default(true),
      featured: z.boolean().default(false),
    })
    .optional(),

  // Arrays of objects
  items: z
    .array(
      z.object({
        title: z.string(),
        value: z.union([z.string(), z.number()]),
        order: z.number().default(0),
      })
    )
    .optional(),
})

// Infer TypeScript type from Zod schema
export type TemplateType = z.infer<typeof TemplateSchema>

// Mongoose document interface
export interface ITemplate extends Document {
  name: string
  description?: string
  category: 'type1' | 'type2' | 'type3'
  tags?: string[]
  isActive: boolean
  metadata?: Record<string, any>

  // Relationships
  userId: string
  parentId?: string

  // Nested objects
  settings?: {
    visibility: 'public' | 'private' | 'unlisted'
    allowComments: boolean
    featured: boolean
  }

  // Arrays of objects
  items?: Array<{
    title: string
    value: string | number
    order: number
  }>

  // Timestamps (added by Mongoose)
  createdAt: Date
  updatedAt: Date

  // Instance methods
  toPublicJSON(): Partial<ITemplate>
  isOwnedBy(userId: string): boolean
  activate(): Promise<ITemplate>
  deactivate(): Promise<ITemplate>
  addTag(tag: string): Promise<ITemplate>
  removeTag(tag: string): Promise<ITemplate>
}

// Mongoose schema
const templateSchema = new mongoose.Schema<ITemplate>(
  {
    name: {
      type: String,
      required: true,
      trim: true,
      maxlength: 100,
    },
    description: {
      type: String,
      trim: true,
      maxlength: 500,
    },
    category: {
      type: String,
      enum: ['type1', 'type2', 'type3'],
      default: 'type1',
    },
    tags: [
      {
        type: String,
        trim: true,
        lowercase: true,
      },
    ],
    isActive: {
      type: Boolean,
      default: true,
    },
    metadata: {
      type: mongoose.Schema.Types.Mixed,
      default: {},
    },

    // Relationships
    userId: {
      type: String,
      required: true,
      index: true,
    },
    parentId: {
      type: String,
      index: true,
    },

    // Nested objects
    settings: {
      visibility: {
        type: String,
        enum: ['public', 'private', 'unlisted'],
        default: 'public',
      },
      allowComments: {
        type: Boolean,
        default: true,
      },
      featured: {
        type: Boolean,
        default: false,
      },
    },

    // Arrays of objects
    items: [
      {
        title: {
          type: String,
          required: true,
        },
        value: {
          type: mongoose.Schema.Types.Mixed,
          required: true,
        },
        order: {
          type: Number,
          default: 0,
        },
      },
    ],
  },
  {
    timestamps: true,
    toJSON: { virtuals: true },
    toObject: { virtuals: true },
  }
)

// Indexes for performance
templateSchema.index({ userId: 1, isActive: 1 })
templateSchema.index({ category: 1, isActive: 1 })
templateSchema.index({ tags: 1 })
templateSchema.index({ createdAt: -1 })
templateSchema.index({ 'settings.featured': 1, isActive: 1 })

// Text search index
templateSchema.index({
  name: 'text',
  description: 'text',
  tags: 'text',
})

// Virtual fields
templateSchema.virtual('itemCount').get(function () {
  return this.items?.length || 0
})

templateSchema.virtual('url').get(function () {
  return `/templates/${this._id}`
})

// Instance methods
templateSchema.methods.toPublicJSON = function (): Partial<ITemplate> {
  const obj = this.toObject()

  // Remove sensitive fields
  delete obj.metadata
  delete obj.__v

  return obj
}

templateSchema.methods.isOwnedBy = function (userId: string): boolean {
  return this.userId === userId
}

templateSchema.methods.activate = async function (): Promise<ITemplate> {
  this.isActive = true
  return this.save()
}

templateSchema.methods.deactivate = async function (): Promise<ITemplate> {
  this.isActive = false
  return this.save()
}

templateSchema.methods.addTag = async function (tag: string): Promise<ITemplate> {
  const normalizedTag = tag.toLowerCase().trim()
  if (!this.tags?.includes(normalizedTag)) {
    if (!this.tags) this.tags = []
    this.tags.push(normalizedTag)
    return this.save()
  }
  return this
}

templateSchema.methods.removeTag = async function (tag: string): Promise<ITemplate> {
  const normalizedTag = tag.toLowerCase().trim()
  if (this.tags?.includes(normalizedTag)) {
    this.tags = this.tags.filter((t) => t !== normalizedTag)
    return this.save()
  }
  return this
}

// Static methods
templateSchema.statics.findByUser = function (userId: string) {
  return this.find({ userId, isActive: true }).sort({ createdAt: -1 })
}

templateSchema.statics.findFeatured = function (limit: number = 10) {
  return this.find({
    'settings.featured': true,
    isActive: true,
    'settings.visibility': 'public',
  })
    .limit(limit)
    .sort({ createdAt: -1 })
}

templateSchema.statics.findByCategory = function (category: string) {
  return this.find({
    category,
    isActive: true,
    'settings.visibility': 'public',
  }).sort({ createdAt: -1 })
}

templateSchema.statics.search = function (query: string, limit: number = 20) {
  return this.find(
    {
      $text: { $search: query },
      isActive: true,
      'settings.visibility': 'public',
    },
    { score: { $meta: 'textScore' } }
  )
    .sort({ score: { $meta: 'textScore' } })
    .limit(limit)
}

// Pre-save middleware
templateSchema.pre('save', function (next) {
  // Normalize tags
  if (this.tags) {
    this.tags = this.tags.map((tag) => tag.toLowerCase().trim()).filter(Boolean)
    // Remove duplicates
    this.tags = [...new Set(this.tags)]
  }

  // Sort items by order
  if (this.items && this.items.length > 0) {
    this.items.sort((a, b) => a.order - b.order)
  }

  next()
})

// Post-save middleware
templateSchema.post('save', function (doc) {
  console.log(`Template saved: ${doc.name} (${doc._id})`)
})

// Model interface with static methods
interface ITemplateModel extends Model<ITemplate> {
  findByUser(userId: string): Promise<ITemplate[]>
  findFeatured(limit?: number): Promise<ITemplate[]>
  findByCategory(category: string): Promise<ITemplate[]>
  search(query: string, limit?: number): Promise<ITemplate[]>
}

// Export the model
export const Template = (mongoose.models.Template ||
  mongoose.model<ITemplate, ITemplateModel>('Template', templateSchema)) as ITemplateModel

/**
 * Usage Examples:
 *
 * 1. Create a new template:
 *    const template = new Template({
 *      name: 'My Template',
 *      userId: 'user123',
 *      category: 'type1',
 *    });
 *    await template.save();
 *
 * 2. Find user's templates:
 *    const templates = await Template.findByUser('user123');
 *
 * 3. Search templates:
 *    const results = await Template.search('react component');
 *
 * 4. Validate data before saving:
 *    try {
 *      const validData = TemplateSchema.parse(inputData);
 *      const template = new Template(validData);
 *      await template.save();
 *    } catch (error) {
 *      // Handle validation error
 *    }
 */