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

func generateAudio(seed int64, length int64, sampleRate int64, functionLength int64, number int64) error {
    rand.Seed(seed)
    dir := fmt.Sprintf("autoaudio%v", seed)
    err := os.MkdirAll(dir, 0700)
    if err != nil { return err }
    err = autoutils.RunInBatches(number, "Generating audio...", func (n int64, errs chan<- error) {
        filename := fmt.Sprintf("%v/%09d.wav", dir, n)
        file, err := os.Create(filename)
        if err != nil {
            errs <- err
            return
        }
        err = autoart.GenerateAudio(file, float64(length), int32(sampleRate), int(functionLength), autoart.MOD)
        if err != nil {
            errs <- err
            return
        }
        errs <- file.Close()
    })
    if err != nil { return err }
    fmt.Println("Done. Your audio is in this directory:", dir)
    return nil
}

func autoAudio(reader *bufio.Reader) error {
    prompt := `How many options do you want?
1. None - Just make some audio
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
    }
    t := time.Now().UTC().UnixNano()
    if option == 1 {
        filename := fmt.Sprintf("autoaudio%v.wav", t)
        rand.Seed(t)
        file, err := os.Create(filename)
        if err != nil { return err }
        err = autoart.GenerateAudio(file, 60, 44100, 80, autoart.MOD)
        if err != nil { return err }
        fmt.Println("Generated audio:", filename)
        return nil
    }
    positive := func (i int64) bool { return i > 0 }
    length, err := readInt64(reader, "Length in seconds (default: 60)? ", positive, 60)
    if err != nil { return err }
    number, err := readInt64(reader, "Number (default: 1)? ", positive, 1)
    if err != nil { return err }
    if option == 2 {
        return generateAudio(t, length, 44100, 80, number)
    }
    sampleRate, err := readInt64(reader, "Sample rate (default: 44100)? ", positive, 44100)
    if err != nil { return err }
    functionLength, err := readInt64(reader, "Function length (default: 80)? ", positive, 80)
    if err != nil { return err }
    seed, err := readInt64(reader, "Random seed (default: current time)? ", positive, t)
    if err != nil { return err }
    return generateAudio(seed, length, sampleRate, functionLength, number)

}