package main

import (
	"fmt"
	"image"
	"image/color"
	"image/gif"
	"log"
)

func main() {
	var (
		err        error
		gif        *gif.GIF
		size       image.Point
		pix        color.Color
		r          uint32
		g          uint32
		b          uint32
		hits       uint32
		total_hits uint64
	)
	/*
		err = GrabPascoGif()
		if err != nil {
			log.Panic("GrabPascoGif() >", err)
		}
		err = GrabCentralFloridaGif()
		if err != nil {
			log.Panic("GrabCentralFloridaGif() >", err)
		}
	*/

	gif, err = DecodeGif("pasco.gif")
	if err != nil {
		log.Panic("DecodeGif(\"pasco.gif\") >", err)
	}

	total_hits = 0
	for frame_num, frame := range gif.Image {
		size = frame.Bounds().Size()
		hits = 0
		for y := range make([]byte, size.Y) {
			for x := range make([]byte, size.X) {
				pix = frame.At(x, y)
				r, g, b, _ = pix.RGBA()
				r /= 255
				g /= 255
				b /= 255
				// Now to determine if this pixel is considerable as rain
				if r <= 140 && g >= 120 && b <= 140 {
					//fmt.Printf("{(%d, %d) [%d, %d, %d]} ", x, y, r, g, b)
					frame.Set(x, y, color.RGBA{R: 255, G: 0, B: 0, A: 255})
					hits += 1
				}
			}
		}
		fmt.Printf("%s-%d: %d hits\r\n", "pasco.gif", frame_num, hits)
		total_hits += uint64(hits)
	}
	fmt.Printf("%s: %d total hits\r\n", "pasco.gif", total_hits)

	err = EncodeGif("out", gif)
	if err != nil {
		log.Panic("EncodeGif(\"out\", gif) >", err)
	}
	/*
		err = EncodeGif("out", gif, true)
		if err != nil {
			log.Panic("EncodeGif(\"out\", gif, true) >", err)
		}
	*/
}