package worldMap

import (
	"bytes"
	"fmt"
	"image"
	"image/png"
	"os"

	"github.com/veandco/go-sdl2/sdl"
)

const (
	mapWidth  = 24
	mapHeight = 24
	texWidth  = 64
	texHeight = 64
)

var textures [8][]uint32

var level = [mapWidth][mapHeight]int{
	{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},
	{1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
	{1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
	{1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
	{1, 0, 0, 0, 0, 0, 2, 2, 2, 2, 2, 0, 0, 0, 0, 3, 0, 3, 0, 3, 0, 0, 0, 1},
	{1, 0, 0, 0, 0, 0, 2, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
	{1, 0, 0, 0, 0, 0, 2, 0, 0, 0, 2, 0, 0, 0, 0, 3, 0, 0, 0, 3, 0, 0, 0, 1},
	{1, 0, 0, 0, 0, 0, 2, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
	{1, 0, 0, 0, 0, 0, 2, 2, 0, 2, 2, 0, 0, 0, 0, 3, 0, 3, 0, 3, 0, 0, 0, 1},
	{1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
	{1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
	{1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
	{1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
	{1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
	{1, 4, 4, 4, 4, 4, 4, 4, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
	{1, 4, 0, 4, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
	{1, 4, 0, 0, 0, 0, 5, 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
	{1, 4, 0, 4, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
	{1, 4, 0, 4, 4, 4, 4, 4, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
	{1, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
	{1, 4, 4, 4, 4, 4, 4, 4, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
	{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},
}

func loadImage(out *[]uint32, w uint32, h uint32, filename string) error {
	// Read the file content
	file, err := os.ReadFile(filename)
	if err != nil {
		fmt.Println("Error reading file:", err)
		return err
	}

	// Decode the PNG file
	img, err := png.Decode(bytes.NewReader(file))
	fmt.Println(filename)
	if err != nil {
		fmt.Println("Error decoding PNG:", err)
		return err
	}

	// Get the width and height
	w = uint32(img.Bounds().Dx())
	h = uint32(img.Bounds().Dy())

	// Resize the output slice to hold the pixel data
	*out = make([]uint32, w*h)

	// Convert the image to RGBA and extract pixel data
	rgbaImg, ok := img.(*image.RGBA)
	if !ok {
		fmt.Println("Image is not in RGBA format")
		return err
	}

	// Process each pixel and store it in the output slice
	for i := range *out {
		r := rgbaImg.Pix[i*4+0]
		g := rgbaImg.Pix[i*4+1]
		b := rgbaImg.Pix[i*4+2]
		a := rgbaImg.Pix[i*4+3]

		// Pack the ARGB values into a uint32
		(*out)[i] = uint32(a)<<24 | uint32(r)<<16 | uint32(g)<<8 | uint32(b)
	}

	return nil
}

func GetMap() [24][24]int {
	return level
}

func LoadTextures(renderer *sdl.Renderer) ([][]uint32, error) {
	textureFiles := []string{
		"assets/eagle.png", "assets/redbrick.png", "assets/purplestone.png", "assets/greystone.png",
		"assets/bluestone.png", "assets/mossy.png", "assets/wood.png", "assets/colorstone.png",
	}

	textures := make([][]uint32, 8)

	for i, file := range textureFiles {
		var out []uint32
		if err := loadImage(&out, uint32(64), 64, file); err != nil {
			panic(err)
		}

		textures[i] = out
	}

	return textures, nil
}