import { DOMParser } from 'xmldom'

import { Template } from '../elements'

export const resolveTemplateRefs = (
    xml: string,
    templates: Record<string, Template> = {}
): string => {
    const parser = new DOMParser()
    const dom = parser.parseFromString(xml, 'text/xml')

    // replace template nodes with their actual content
    const useTemplateNodes = Array.from(dom.getElementsByTagName('UseTemplate'))

    useTemplateNodes.forEach((node) => {
        const templateName = node.getAttribute('ref')
        if (!templateName) return

        const template = templates[templateName]
        if (!template) return

        // get all the attributes
        const attrs = Array.from(node.attributes).reduce((acc, attr) => {
            if (attr.name === 'ref') return acc
            acc[attr.name] = attr.value
            return acc
        }, {} as Record<string, string>)

        const templateText = template.Text

        // replace the variables in the template text
        // todo: update type 
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        let text = (templateText as any)._ ?? templateText
        Object.entries(attrs).forEach(([key, value]) => {
            text = text.replace(new RegExp(`{${key}}`, 'g'), value)
        })

        const textNode = dom.createTextNode(text)
        node.parentNode?.replaceChild(textNode, node)

    })

    return dom.toString()
}