var gulp = require('gulp')
var browserify = require('gulp-browserify')

var concat = require('gulp-concat')
var uglify = require('gulp-uglify')
var extReplace = require('gulp-ext-replace')
var rename = require('gulp-rename')
var insert = require('gulp-insert')

/**
 * dist targets
 * * dist - creates everything
 * * mermaidAPI
 * * mermaidAPI.slim
 * * legacy - uses old build creates mermaid.full and mermaid.slim
 * * mermaid - new build creates mermaid.js and mermaid.min.js, mermaid.no-d3.js mermaid.no-d3.min.js
 */

// Basic usage
gulp.task('slimDist', function () {
  // Single entry point to browserify
  return gulp.src('src/main.js')
    .pipe(browserify())
    .pipe(rename('mermaid-legacy.slim.js'))
    .pipe(insert.prepend('(function () { var define = undefined; '))
    .pipe(insert.append(' })();'))
    .pipe(gulp.dest('./dist/'))
    .pipe(uglify())
    .pipe(extReplace('.min.js'))
    .pipe(gulp.dest('./dist/'))
})

// Basic usage
gulp.task('fullDist', ['slimDist'], function () {
  // Single entry point to browserify
  gulp.src(['node_modules/d3/d3.min.js', 'node_modules/dagre-d3/dist/dagre-d3.min.js', 'dist/mermaid.slim.js'])
    .pipe(concat('mermaid-legacy.full.js'))
    .pipe(gulp.dest('./dist/'))
  return gulp.src(['node_modules/d3/d3.min.js', 'node_modules/dagre-d3/dist/dagre-d3.min.js', 'dist/mermaid.slim.min.js'])
    .pipe(concat('mermaid.full.min.js'))
    .pipe(gulp.dest('./dist/'))
})

// Basic usage
gulp.task('mermaid.slim', function () {
  return gulp.src('src/mermaid.js')
    .pipe(browserify({
      external: ['d3'],
      entry: 'src/mermaid.js',
      standalone: 'mermaid'
    }))
    .pipe(rename('mermaid.slim.js'))
    .pipe(gulp.dest('./dist/'))
    .pipe(uglify())
    .pipe(extReplace('.min.js'))
    .pipe(gulp.dest('./dist/'))
})

// Basic usage
gulp.task('mermaid', function () {
  return gulp.src('src/mermaid.js')
    .pipe(browserify({
      entry: 'src/mermaid.js',
      standalone: 'mermaid'
    }))
    .pipe(rename('mermaid.js'))
    .pipe(gulp.dest('./dist/'))
    .pipe(uglify())
    .pipe(extReplace('.min.js'))
    .pipe(gulp.dest('./dist/'))
})

// Basic usage
gulp.task('mermaidAPI', function () {
  return gulp.src('src/mermaidAPI.js')
    .pipe(browserify({
    }))
    .pipe(gulp.dest('./dist/'))
})

// Basic usage
gulp.task('mermaidAPI.slim', function () {
  return gulp.src('src/mermaidAPI.js')
    .pipe(browserify({
      debug: true,
      external: ['d3']
    }))
    .pipe(rename('mermaidAPI.slim.js'))
    .pipe(gulp.dest('./dist/'))
    .pipe(uglify())
    .pipe(extReplace('.min.js'))
    .pipe(gulp.dest('./dist/'))
})

// Build editor
gulp.task('editor', function () {
  return gulp.src(['node_modules/d3/d3.min.js', 'node_modules/dagre-d3/dist/dagre-d3.min.js', 'dist/mermaid.slim.js', 'src/editor.js'])
    .pipe(concat('build.js'))
    .pipe(gulp.dest('./editor/'))
})

gulp.task('legacy', ['slimDist', 'fullDist'])

gulp.task('dist', ['mermaidAPI', 'mermaidAPI.slim', 'mermaid.slim', 'mermaid'])