package main

import (
	"context"
	"encoding/base64"
	_ "image/jpeg"
	_ "image/png"
	"os"

	"github.com/wailsapp/wails/v2/pkg/runtime"
	"gitnet.fr/deblan/go-imager/pkg/img"
)

type OpenFileResult struct {
	Path   string `json:"path"`
	Type   string `json:"type"`
	Base64 string `json:"base64"`
	Error  bool   `json:"error"`
}

type App struct {
	ctx context.Context
}

func NewApp() *App {
	return &App{}
}

func (a *App) startup(ctx context.Context) {
	a.ctx = ctx
}

func (a *App) OpenImageFile() *img.ImageInfo {
	file, err := runtime.OpenFileDialog(a.ctx, runtime.OpenDialogOptions{
		Filters: []runtime.FileFilter{
			runtime.FileFilter{
				Pattern:     "*.jpg;*.png;*.jpeg;*.JPG;*.PNG;*.JPEG",
				DisplayName: "Images",
			},
		},
	})

	if err != nil {
		return nil
	}

	return img.GetImageInfo(file)
}

func (a *App) SaveImageFile(src img.ImageInfo) error {
	file, err := runtime.SaveFileDialog(a.ctx, runtime.SaveDialogOptions{
		DefaultFilename: "result." + src.Type,
	})

	if err != nil {
		return err
	}

	content, err := base64.StdEncoding.DecodeString(src.Base64)

	if err != nil {
		return err
	}

	writer, err := os.Create(file)

	if err != nil {
		return err
	}

	defer writer.Close()

	if _, err := writer.Write(content); err != nil {
		return err
	}

	if err := writer.Sync(); err != nil {
		return err
	}

	return nil
}

func (a *App) ApplyEffects(src img.ImageInfo, effects []img.ImageEffect) *img.ImageInfo {
	return img.ApplyFilters(&src, effects)
}