import { App } from "../app/app"
import { BunProc } from "../bun"
import { Config } from "../config/config"
import { Log } from "../util/log"
import path from "path"

export namespace Format {
  const log = Log.create({ service: "format" })

  const state = App.state("format", async () => {
    const hooks: Record<string, Hook[]> = {}
    for (const item of FORMATTERS) {
      if (await item.enabled()) {
        for (const ext of item.extensions) {
          const list = hooks[ext] ?? []
          list.push({
            command: item.command,
            environment: item.environment,
          })
          hooks[ext] = list
        }
      }
    }

    const cfg = await Config.get()
    for (const [file, items] of Object.entries(
      cfg.experimental?.hook?.file_edited ?? {},
    )) {
      for (const item of items) {
        const list = hooks[file] ?? []
        list.push({
          command: item.command,
          environment: item.environment,
        })
        hooks[file] = list
      }
    }

    return {
      hooks,
    }
  })

  export async function run(file: string) {
    log.info("formatting", { file })
    const { hooks } = await state()
    const ext = path.extname(file)
    const match = hooks[ext]
    if (!match) return

    for (const item of match) {
      log.info("running", { command: item.command })
      const proc = Bun.spawn({
        cmd: item.command.map((x) => x.replace("$FILE", file)),
        cwd: App.info().path.cwd,
        env: item.environment,
        stdout: "ignore",
        stderr: "ignore",
      })
      const exit = await proc.exited
      if (exit !== 0)
        log.error("failed", {
          command: item.command,
          ...item.environment,
        })
    }
  }

  interface Hook {
    command: string[]
    environment?: Record<string, string>
  }

  interface Native {
    name: string
    command: string[]
    environment?: Record<string, string>
    extensions: string[]
    enabled(): Promise<boolean>
  }

  const FORMATTERS: Native[] = [
    {
      name: "prettier",
      command: [BunProc.which(), "run", "prettier", "--write", "$FILE"],
      environment: {
        BUN_BE_BUN: "1",
      },
      extensions: [
        ".js",
        ".jsx",
        ".mjs",
        ".cjs",
        ".ts",
        ".tsx",
        ".mts",
        ".cts",
        ".html",
        ".htm",
        ".css",
        ".scss",
        ".sass",
        ".less",
        ".vue",
        ".svelte",
        ".json",
        ".jsonc",
        ".yaml",
        ".yml",
        ".toml",
        ".xml",
        ".md",
        ".mdx",
        ".graphql",
        ".gql",
      ],
      async enabled() {
        try {
          const proc = Bun.spawn({
            cmd: [BunProc.which(), "run", "prettier", "--version"],
            cwd: App.info().path.cwd,
            env: {
              BUN_BE_BUN: "1",
            },
            stdout: "ignore",
            stderr: "ignore",
          })
          const exit = await proc.exited
          return exit === 0
        } catch {
          return false
        }
      },
    },
  ]
}