// Prevents reinitialization of compiler and renderer options during HMR (Hot Module Replacement).
// Use prepareUseOnce flag ensures initialization occurs only once to avoid duplicate calls to setXXXInitOptions.
// From https://github.com/Myriad-Dreamin/typst.ts/blob/main/packages/typst.svelte/src/lib/set-init-options-typst.ts
import { $typst, loadFonts } from '@myriaddreamin/typst.ts'

let inited = false

const rendererWasmUrl = 'https://cdn.jsdelivr.net/npm/@myriaddreamin/typst-ts-renderer@v0.8.0-rc3/pkg/typst_ts_renderer_bg.wasm'
const compilerWasmUrl = 'https://cdn.jsdelivr.net/npm/@myriaddreamin/typst-ts-web-compiler@v0.8.0-rc3/pkg/typst_ts_web_compiler_bg.wasm'

export default async () => {
    if (!inited) {
        const font = await import('$lib/assets/GoogleSansFlex/GoogleSansFlex-VariableFont.ttf?url').then(font => font.default)

        const fonts = loadFonts([font])

        $typst.setCompilerInitOptions({
            getModule: () =>
                compilerWasmUrl,
            beforeBuild: [
                fonts,
            ],
        })

        $typst.setRendererInitOptions({
            getModule: () => rendererWasmUrl,
            beforeBuild: [
                fonts,
            ],
        })

        inited = true
    }
    return $typst
}