const VersionedModel = require('../VersionedModel')
const uuid = require('uuid/v4')

/*
 * Node Model
 * -------------------------------------------------------------
 * Put some description here!
 */
class Node extends VersionedModel {
	static get services() {
		return [...super.services, 'models']
	}

	static get schema() {
		// Return a flitter-orm schema here.
		return {
			...super.schema,
			UUID: { type: String, default: () => uuid() },
			Type: String,
			Value: {
				Mode: {type: String, default: 'norm'},
				Value: String,
			},
			PageId: String,
			CreatedAt: { type: Date, default: () => new Date },
			UpdatedAt: { type: Date, default: () => new Date },
			CreatedUserId: String,
			UpdateUserId: String
		};
	}

	// Static and instance methods can go here
	get page() {
		const Page = this.models.get('api:Page')
		return this.belongs_to_one(Page, "PageId", "UUID")
	}

	to_html() {
		switch(this.Type){
			case 'paragraph':
				return '<p>' + this.Value.Value + '</p>'
			case 'header1':
				return '<h1>' + this.Value.Value + '</h1>'
			case 'header2':
				return '<h2>' + this.Value.Value + '</h2>'
			case 'header3':
				return '<h3>' + this.Value.Value + '</h3>'
			case 'header4':
				return '<h4>' + this.Value.Value + '</h4>'
			case 'block_code':
				return '<pre><code>' + this.Value.Value + '</code></pre>'
			case 'click_link':
				return '<a href="' + this.Value.Value + '">' + this.Value.Value + '</a>'
		}
	}

	update_from_raw(data) {
		if ( data.Type ) this.Type = data.Type
		if ( data.Value ) this.Value = data.Value
	}

	async cast_to_version_data() {
		const data = await super.cast_to_version_data()

		// If supported, fetch the current version of the node item
		if ( this.Type === 'code_ref' && this.Value?.Value ) {
			const Codium = this.models.get('api:Codium')
			const code = await Codium.findOne({ UUID: this.Value?.Value, Active: true })
			if ( code ) {
				data.associated_type_version_num = code.version_num
			}
		} else if ( this.Type === 'file_ref' && this.Value?.Value ) {
			const FileGroup = this.models.get('api:FileGroup')
			const group = await FileGroup.findOne({ UUID: this.Value?.Value })
			if ( group ) {
				data.associated_type_version_num = group.version_num
			}
		} else if ( this.Type === 'database_ref' && this.Value?.Value ) {
			const Database = this.models.get('api:db:Database')
			const db = await Database.findOne({ Active: true, UUID: this.Value?.Value })
			if ( db ) {
				data.associated_type_version_num = db.version_num
			}
		}

		return data
	}

	async revert_to_version(version_num, user_id = undefined) {
		const reverted = await super.revert_to_version(version_num, user_id)
		const data = await this.get_version_data(version_num)

		if ( !data.associated_type_version_num ) return reverted

		// If supported, revert the version of the node item
		if ( this.Type === 'code_ref' && this.Value?.Value ) {
			const Codium = this.models.get('api:Codium')
			const code = await Codium.findOne({ UUID: this.Value?.Value, Active: true })
			if ( code ) {
				await code.revert_to_version(data.associated_type_version_num)
			}
		} else if ( this.Type === 'file_ref' && this.Value?.Value ) {
			const FileGroup = this.models.get('api:FileGroup')
			const group = await FileGroup.findOne({ UUID: this.Value?.Value })
			if ( group ) {
				await group.revert_to_version(data.associated_type_version_num)
			}
		} else if ( this.Type === 'database_ref' && this.Value?.Value ) {
			const Database = this.models.get('api:db:Database')
			const db = await Database.findOne({ Active: true, UUID: this.Value?.Value })
			if ( db ) {
				await db.revert_to_version(data.associated_type_version_num)
			}
		}

		return reverted
	}
}

module.exports = exports = Node;