#!/usr/bin/env node
const globby = require('globby')
const lernaConfig = require('../lerna.json')

const DEP_FIELDS = [
  'dependencies',
  'devDependencies',
  'peerDependencies',
  'optionalDependencies',
]

globby(lernaConfig.packages)
  .then(paths => {
    return paths.reduce((packages, path) => {
      try {
        const pkg = require(`../${path}/package.json`)
        pkg.path = path
        packages.push(pkg)
      } catch (error) {
      }
      return packages
    }, [])
  })
  .then(packages => {
    console.log('⏱   checking %d packages...', packages.length)
    const map = new Map()
    const matches = []
    packages.forEach(pkg => map.set(pkg.name, pkg))
    packages.forEach(pkg => {
      DEP_FIELDS
        .filter(field => field in pkg)
        .forEach(field => {
          const deps = pkg[field]
          Object.keys(deps)
            .filter(dep => map.has(dep))
            .forEach(dep => {
              const expected = map.get(dep).version
              const actual = deps[dep]
              if (expected !== actual) {
                throw new Error(
                  `${pkg.name}.${field} has bad version for ${dep}: ${expected} != ${actual}`
                )
              } else {
                matches.push({
                  from: pkg.name,
                  to: dep,
                  field,
                  version: expected
                })
              }
            })
        })
    })
    return matches
  })
  .catch(error => {
    console.error(error.message)
    process.exit(1)
  })
  .then(matches => {
    console.warn('✅   checked %d matching version dependencies', matches.length)
  })