package main

import (
	"errors"
	"log"
	"os"

	"github.com/gin-gonic/gin"
	"github.com/joho/godotenv"
	"gorm.io/driver/postgres"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
	"stereo.cat/backend/internal/api"
	"stereo.cat/backend/internal/auth"
	"stereo.cat/backend/internal/auth/client"
	"stereo.cat/backend/internal/types"
)

func getEnv(key, fallback string) string {
	if value, ok := os.LookupEnv(key); ok {
		return value
	}
	return fallback
}

func main() {
	_ = godotenv.Load()

	databaseType := getEnv("DATABASE_TYPE", "sqlite")
	sqliteFile := getEnv("SQLITE_FILE", "stereo.db")
	imagePath := getEnv("IMAGE_PATH", os.TempDir())

	if _, err := os.Stat(imagePath); err != nil {
		if os.IsNotExist(err) {
			if err := os.MkdirAll(imagePath, os.ModePerm); err != nil {
				log.Fatal(err)
			}
		}
	}

	c := types.StereoConfig{
		Router:    gin.Default(),
		ImagePath: imagePath,
		Client: client.New(
			os.Getenv("REDIRECT_URI"),
			os.Getenv("CLIENT_ID"),
			os.Getenv("CLIENT_SECRET"),
		),
	}

	switch databaseType {
        case "sqlite":
            db, err := gorm.Open(sqlite.Open(sqliteFile), &gorm.Config{})

            c.Database = db

            if err != nil {
                panic(err)
            }

            break

        case "postgres":
            db, err := gorm.Open(postgres.Open(os.Getenv("POSTGRES_DSN")), &gorm.Config{})

            c.Database = db

            if err != nil {
                panic(err)
            }

            break
        default:
            panic(errors.New("Invalid database type was specified."))
	}

    c.Database.AutoMigrate(&auth.User{})

	api.Register(&c)

	c.Router.Run()
}