#!/usr/bin/env bun

import solidPlugin from "./solid-plugin"
import path from "path"
import { $ } from "bun"
import { fileURLToPath } from "url"
import { createRequire } from "module"

const __filename = fileURLToPath(import.meta.url)
const __dirname = path.dirname(__filename)
const require = createRequire(import.meta.url)
const dir = path.resolve(__dirname, "..")

process.chdir(dir)

import pkg from "../package.json"
import { Script } from "@opencode-ai/script"
import fs from "fs/promises"
import nodefs from "fs"

await $`bun run build:webgui`

const webGuiDir = path.join(dir, "webgui-dist")
const embedOutput = path.join(dir, "src/webgui/embed.generated.ts")

async function listWebGuiFiles(current: string) {
  const entries = await fs.readdir(current, { withFileTypes: true })
  const files: { path: string; data: string }[] = []
  for (const entry of entries) {
    const absolute = path.join(current, entry.name)
    if (entry.isDirectory()) {
      const nested = await listWebGuiFiles(absolute)
      files.push(...nested)
      continue
    }
    const relative = path.relative(webGuiDir, absolute).split(path.sep).join("/")
    const file = Bun.file(absolute)
    const buffer = Buffer.from(await file.arrayBuffer())
    files.push({ path: relative, data: buffer.toString("base64") })
  }
  return files
}

async function generateEmbeddedWebGui() {
  const indexFile = Bun.file(path.join(webGuiDir, "index.html"))
  if (!(await indexFile.exists())) {
    await Bun.write(embedOutput, "export const embeddedWebGui = [] as const\n")
    return
  }
  const items = await listWebGuiFiles(webGuiDir)
  const lines = [
    "export const embeddedWebGui = [",
    ...items.map((item) => `  { path: ${JSON.stringify(item.path)}, data: ${JSON.stringify(item.data)} },`),
    "] as const",
    "",
  ]
  await Bun.write(embedOutput, lines.join("\n"))
}

await generateEmbeddedWebGui()

const modelsUrl = process.env.OPENCODE_MODELS_URL || "https://models.dev"
// Fetch and generate models.dev snapshot
const modelsData = process.env.MODELS_DEV_API_JSON
  ? await Bun.file(process.env.MODELS_DEV_API_JSON).text()
  : await fetch(`${modelsUrl}/api.json`).then((x) => x.text())
await Bun.write(
  path.join(dir, "src/provider/models-snapshot.ts"),
  `// Auto-generated by build.ts - do not edit\nexport const snapshot = ${modelsData} as const\n`,
)
console.log("Generated models-snapshot.ts")

const singleFlag = process.argv.includes("--single")
const baselineFlag = process.argv.includes("--baseline")
const skipInstall = process.argv.includes("--skip-install")

const allTargets: {
  os: string
  arch: "arm64" | "x64"
  abi?: "musl"
  avx2?: false
}[] = [
  {
    os: "linux",
    arch: "arm64",
  },
  {
    os: "linux",
    arch: "x64",
  },
  {
    os: "darwin",
    arch: "arm64",
  },
  {
    os: "darwin",
    arch: "x64",
  },
  {
    os: "win32",
    arch: "x64",
  },
]

const targets = singleFlag
  ? allTargets.filter((item) => {
      if (item.os !== process.platform || item.arch !== process.arch) {
        return false
      }

      // When building for the current platform, prefer a single native binary by default.
      // Baseline binaries require additional Bun artifacts and can be flaky to download.
      if (item.avx2 === false) {
        return baselineFlag
      }

      // also skip abi-specific builds for the same reason
      if (item.abi !== undefined) {
        return false
      }

      return true
    })
  : allTargets

await fs.rm("dist", { recursive: true, force: true })

const binaries: Record<string, string> = {}
if (!skipInstall) {
  await $`bun install --os="*" --cpu="*" @opentui/core@${pkg.dependencies["@opentui/core"]}`
  await $`bun install --os="*" --cpu="*" @parcel/watcher@${pkg.dependencies["@parcel/watcher"]}`
}
for (const item of targets) {
  const name = [
    pkg.name,
    // changing to win32 flags npm for some reason
    item.os === "win32" ? "windows" : item.os,
    item.arch,
    item.avx2 === false ? "baseline" : undefined,
    item.abi === undefined ? undefined : item.abi,
  ]
    .filter(Boolean)
    .join("-")
  console.log(`building ${name}`)
  await fs.mkdir(`dist/${name}/bin`, { recursive: true })

  const opentuiCoreEntry = require.resolve("@opentui/core")
  const parserWorker = nodefs.realpathSync(path.join(path.dirname(opentuiCoreEntry), "parser.worker.js"))
  const workerPath = "./src/cli/cmd/tui/worker.ts"

  // Use platform-specific bunfs root path based on target OS
  const bunfsRoot = item.os === "win32" ? "B:/~BUN/root/" : "/$bunfs/root/"
  const workerRelativePath = path.relative(dir, parserWorker).replaceAll("\\", "/")

  await Bun.build({
    conditions: ["browser"],
    tsconfig: "./tsconfig.json",
    plugins: [solidPlugin],
    sourcemap: "external",
    compile: {
      autoloadBunfig: false,
      autoloadDotenv: false,
      //@ts-ignore (bun types aren't up to date)
      autoloadTsconfig: true,
      autoloadPackageJson: true,
      target: name.replace(pkg.name, "bun") as any,
      outfile: `dist/${name}/bin/opencode`,
      execArgv: [`--user-agent=opencode/${Script.version}`, "--use-system-ca", "--"],
      windows: {},
    },
    entrypoints: ["./src/index.ts", parserWorker, workerPath],
    define: {
      OPENCODE_VERSION: `'${Script.version}'`,
      OTUI_TREE_SITTER_WORKER_PATH: bunfsRoot + workerRelativePath,
      OPENCODE_WORKER_PATH: workerPath,
      OPENCODE_CHANNEL: `'${Script.channel}'`,
      OPENCODE_LIBC: item.os === "linux" ? `'${item.abi ?? "glibc"}'` : "",
    },
  })

  await fs.rm(`./dist/${name}/bin/tui`, { recursive: true, force: true })
  await Bun.file(`dist/${name}/package.json`).write(
    JSON.stringify(
      {
        name,
        version: Script.version,
        os: [item.os],
        cpu: [item.arch],
      },
      null,
      2,
    ),
  )
  binaries[name] = Script.version
}

if (Script.release) {
  for (const key of Object.keys(binaries)) {
    if (key.includes("linux")) {
      await $`tar -czf ../../${key}.tar.gz *`.cwd(`dist/${key}/bin`)
    } else {
      await $`zip -r ../../${key}.zip *`.cwd(`dist/${key}/bin`)
    }
  }
  await $`gh release upload v${Script.version} ./dist/*.zip ./dist/*.tar.gz --clobber`
}

export { binaries }