/*
Copyright (C) 2019 Leo Tenenbaum

This file is part of AutoArt.

AutoArt is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

AutoArt is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with AutoArt.  If not, see <https://www.gnu.org/licenses/>.
*/

package main

import (
    "fmt"
    "bufio"
    "github.com/pommicket/autoart/autoart"
    "github.com/pommicket/autoart/autoutils"
    "os"
    "image/png"
    "math/rand"
    "time"
	"image"
)

// AutoImages client

func genImage(width int, height int, paletted bool, conf *autoart.Config, pconf *autoart.PaletteConfig, filename string) error {
	var img image.Image
	if paletted {
		img = autoart.GenerateImagePalette(width, height, *pconf)
	} else {
		img = autoart.GenerateImage(width, height, *conf)
	}
    file, err := os.Create(filename)
    if err != nil { return err }
    err = png.Encode(file, img)
    if err != nil {
        file.Close()
        return err
    }
    return file.Close()
}

func batchedImages(seed int64, width int, height int, paletted bool, conf *autoart.Config, pconf *autoart.PaletteConfig, number int64) error {
    // Create a directory for the images
	rand.Seed(seed)
	dir := fmt.Sprintf("autoimages%v", seed)
    err := os.MkdirAll(dir, 0700)
    if err != nil { return err }
    err = autoutils.RunInBatches(number, "Generating images...", func (n int64, errs chan<- error) {
        filename := fmt.Sprintf("%v/%09d.png", dir, n)
        errs <- genImage(width, height, paletted, conf, pconf, filename)
    })

    if err != nil { return err }
    fmt.Println("Done! Your images are in this directory:", dir)
    return nil
}

func autoImages(reader *bufio.Reader) error {
    prompt := `How many options do you want?
1. None - Just make an image
2. Some - Basic options
3. All  - Advanced options
Please enter 1, 2, or 3 (default: 1): `
    option, err := readInt64(reader, prompt, func (i int64) bool {
        return i >= 1 && i <= 3
    }, 1)
    if err != nil {
        return err
    }
    var conf autoart.Config
	var pconf autoart.PaletteConfig
    t := time.Now().UTC().UnixNano()
    if option == 1 {
        rand.Seed(t)
        fmt.Println("Generating image...")
        filename := fmt.Sprintf("autoimages%d.png", t)
        err = genImage(1920, 1080, false, &conf, &pconf, filename)
        if err != nil {
            // We're done!
            fmt.Println("Generated an image:", filename)
        }
        return err
    }
    // Basic options
    positive := func (i int64) bool { return i > 0 }
    width, err := readInt64(reader, "Width (default: 1920)? ", positive, 1920)
    if err != nil { return err }
    height, err := readInt64(reader, "Height (default: 1080)? ", positive, 1080)
    if err != nil { return err }
    number, err := readInt64(reader, "How many (default: 1)? ", positive, 1)
    if err != nil { return err }
    if option == 2 {
        return batchedImages(t, int(width), int(height), false, &conf, &pconf, number)
    }

	paletted, err := readBool(reader, "Should a palette be used (y/n, default: n)? ", false)
	if err != nil { return err }


    // Advanced options
	if paletted {
		err = readPaletteConf(reader, &pconf)
		if err != nil { return err }
	} else {
		err = readConf(reader, &conf)
		if err != nil { return err }
	}
	seed, err := readInt64(reader, "Random seed (default: current time)? ", func (i int64) bool {
        return true
    }, t)

    return batchedImages(seed, int(width), int(height), paletted, &conf, &pconf, number)
}