import * as q from 'q'
import { ProjectinfoNpm } from 'projectinfo'

import * as paths from '../npmts.paths'
import { npmtsOra } from '../npmts.log'

import * as plugins from './mod00.plugins'

export let projectInfo: ProjectinfoNpm

let checkProjectTypings = (configArg) => {
    let done = q.defer()
    npmtsOra.text('Check Module: Check Project Typings...')
    projectInfo =  new ProjectinfoNpm(paths.cwd)
    if (typeof projectInfo.packageJson.typings === 'undefined') {
        plugins.beautylog.error(`please add typings field to package.json`)
        process.exit(1)
    };
    done.resolve(configArg)
    return done.promise
}

const depcheckOptions = {
    ignoreBinPackage: false, // ignore the packages with bin entry
    parsers: { // the target parsers
        '*.ts': plugins.depcheck.parser.typescript
    },
    detectors: [ // the target detectors
        plugins.depcheck.detector.requireCallExpression,
        plugins.depcheck.detector.importDeclaration
    ],
    specials: [ // the target special parsers
        plugins.depcheck.special.eslint,
        plugins.depcheck.special.webpack
    ]
}

let checkDependencies = (configArg) => {
    let done = q.defer()
    npmtsOra.text('Check Module: Check Dependencies...')
    let depcheckOptionsMerged = plugins.lodash.merge(depcheckOptions, {
        ignoreDirs: [ // folder with these names will be ignored
            'test',
            'dist',
            'bower_components'
        ],
        ignoreMatches: [ // ignore dependencies that matches these globs
            '@types/*',
            'babel-preset-*'
        ]
    })
    plugins.depcheck(paths.cwd, depcheckOptionsMerged, (unused) => {
        for (let item of unused.dependencies) {
            plugins.beautylog.warn(`Watch out: unused dependency "${item}"`)
        }
        for (let item in unused.missing) {
            plugins.beautylog.error(`missing dependency "${item}" in package.json`)
        }
        if (unused.missing.length > 0) {
            plugins.beautylog.info('exiting due to missing dependencies in package.json')
            process.exit(1)
        }
        for (let item in unused.invalidFiles) {
            plugins.beautylog.warn(`Watch out: could not parse file ${item.red}`)
        };
        for (let item in unused.invalidDirs) {
            plugins.beautylog.warn(`Watch out: could not parse directory ${item.red}`)
        }
        done.resolve(configArg)
    })
    return done.promise
}

let checkDevDependencies = (configArg) => {
    let done = q.defer()
    npmtsOra.text('Check Module: Check devDependencies...')
    let depcheckOptionsMerged = plugins.lodash.merge(depcheckOptions, {
        ignoreDirs: [ // folder with these names will be ignored
            'ts',
            'dist',
            'bower_components'
        ],
        ignoreMatches: [ // ignore dependencies that matches these globs
            '@types/*',
            'babel-preset-*'
        ]
    })
    plugins.depcheck(paths.cwd, depcheckOptionsMerged, (unused) => {
        for (let item of unused.devDependencies) {
            plugins.beautylog.log(`unused devDependency ${item.red}`)
        }
        for (let item in unused.missing) {
            plugins.beautylog.error(`unused devDependency ${item.red}`)
        }
        if (unused.missing.length > 0) {
            plugins.beautylog.info('exiting due to missing dependencies in package.json')
            process.exit(1)
        }
        for (let item in unused.invalidFiles) {
            plugins.beautylog.warn(`Watch out: could not parse file ${item.red}`)
        }
        for (let item in unused.invalidDirs) {
            plugins.beautylog.warn(`Watch out: could not parse directory ${item.red}`)
        }
        done.resolve(configArg)
    })
    return done.promise
}

let checkNodeVersion = (configArg) => {
    let done = q.defer()
    npmtsOra.text('checking node version')
    done.resolve(configArg)
    return done.promise
}

export let run = (configArg) => {
    let done = q.defer()
    npmtsOra.text('Check Module: ...')
    checkProjectTypings(configArg)
        .then(checkDependencies)
        .then(checkDevDependencies)
        .then(checkNodeVersion)
        .then(done.resolve)
        .catch((err) => { console.log(err) })
    return done.promise
}