module.exports = publish

var npm = require("../npm")
  , registry = require("./utils/npm-registry-client")
  , log = require("./utils/log")
  , tar = require("./utils/tar")
  , sha = require("./utils/sha")
  , path = require("path")
  , readJson = require("./utils/read-json")
  , fs = require("fs")

publish.usage = "npm publish <tarball>"
              + "\nnpm publish <folder>"
              + "\n\nPublishes '.' if no argument supplied"

publish.completion = function (opts, cb) {
  // publish can complete to a folder with a package.json
  // or a tarball, or a tarball url.
  // for now, not yet implemented.
  return cb()
}

function publish (args, isRetry, cb) {
  if (typeof cb !== "function") cb = isRetry, isRetry = false
  if (args.length === 0) args = ["."]
  log.verbose(args, "publish")
  npm.commands.cache.add(args[0], args[1], true, function (er, data) {
    if (er) return cb(er)
    log.silly(data, "publish")
    if (!data) return cb(new Error("no package.json file found"))
    delete data.modules
    if (data.private) return cb(new Error
      ("This package has been marked as private\n"
      +"Remove the 'private' field from the package.json to publish it."))

    // pre-build
    var bd = data.scripts
             && ( data.scripts.preinstall
               || data.scripts.install
               || data.scripts.postinstall )
             && npm.config.get("bindist")
    preBuild(data, bd, function (er, tb) {
      if (er) return cb(er)
      return regPublish(data, tb, isRetry, args, cb)
    })
  })
}

function preBuild (data, bd, cb) {
  if (!bd) return cb()
  // unpack to cache/n/v/build
  // build there
  // pack to cache/package-<bd>.tgz
  var cf = path.resolve(npm.cache, data.name, data.version)
  var pb = path.resolve(cf, "build")
    , buildTarget = path.resolve(pb, "node_modules", data.name)
    , tb = path.resolve(cf, "package-"+bd+".tgz")
    , sourceBall = path.resolve(cf, "package.tgz")

  log.verbose("about to cache unpack")
  log.warn(sourceBall, "the tarball")
  npm.commands.install(pb, sourceBall, function (er) {
    log.info(data._id, "prebuild done")
    // build failure just means that we can't prebuild
    if (er) {
      log.warn(er.message, "prebuild failed "+bd)
      return cb()
    }
    // now strip the preinstall/install scripts
    // they've already been run.
    var pbj = path.resolve(buildTarget, "package.json")
    readJson(pbj, function (er, pbo) {
      if (er) return cb(er)
      if (pbo.scripts) {
        delete pbo.scripts.preinstall
        delete pbo.scripts.install
        delete pbo.scripts.postinstall
      }
      pbo.prebuilt = bd
      pbo.files = pbo.files || []
      pbo.files.push("build")
      fs.writeFile(pbj, JSON.stringify(pbo, null, 2), function (er) {
        if (er) return cb(er)
        tar.pack(tb, buildTarget, pbo, true, function (er) {
          if (er) return cb(er)
          // try to validate the shasum, too
          sha.get(tb, function (er, shasum) {
            if (er) return cb(er)
            // binary distribution requires shasum checking.
            if (!shasum) return cb()
            data.dist.bin = data.dist.bin || {}
            data.dist.bin[bd] = data.dist.bin[bd] || {}
            data.dist.bin[bd].shasum = shasum
            return cb(null, tb)
          })
        })
      })
    })
  })
}

function regPublish (data, prebuilt, isRetry, args, cb) {
  registry.publish(data, prebuilt, function (er) {
    if (er && er.errno === npm.EPUBLISHCONFLICT
        && npm.config.get("force") && !isRetry) {
      log.warn("Forced publish over "+data._id, "publish")
      return npm.commands.unpublish([data._id], function (er) {
        // ignore errors.  Use the force.  Reach out with your feelings.
        publish(args, true, cb)
      })
    }
    cb(er)
  })
}