import { FilePath, QUARTZ, joinSegments } from "../../util/path"
import { QuartzEmitterPlugin } from "../types"
import fs from "fs"
import { glob } from "../../util/glob"
import { dirname } from "path"

export const Static: QuartzEmitterPlugin = () => ({
  name: "Static",
  async *emit({ argv, cfg }) {
    // Copy Quartz's own internal static assets (quartz/static/) → output/static/
    const staticPath = joinSegments(QUARTZ, "static")
    const fps = await glob("**", staticPath, cfg.configuration.ignorePatterns)
    const outputStaticPath = joinSegments(argv.output, "static")
    await fs.promises.mkdir(outputStaticPath, { recursive: true })
    for (const fp of fps) {
      const src = joinSegments(staticPath, fp) as FilePath
      const dest = joinSegments(outputStaticPath, fp) as FilePath
      await fs.promises.mkdir(dirname(dest), { recursive: true })
      await fs.promises.copyFile(src, dest)
      yield dest
    }

    // Copy user-facing static assets (static/) → output/ preserving paths.
    // This mirrors Hugo's convention: static/ox-hugo/foo.png is served at /ox-hugo/foo.png,
    // which matches the src="/ox-hugo/..." paths that ox-hugo writes into exported markdown.
    const userStaticPath = "static"
    if (fs.existsSync(userStaticPath)) {
      const userFps = await glob("**", userStaticPath, cfg.configuration.ignorePatterns, false)
      for (const fp of userFps) {
        const src = joinSegments(userStaticPath, fp) as FilePath
        const dest = joinSegments(argv.output, fp) as FilePath
        await fs.promises.mkdir(dirname(dest), { recursive: true })
        await fs.promises.copyFile(src, dest)
        yield dest
      }
    }
  },
  async *partialEmit() {},
})