package main

import (
	"context"
	"fmt"
	"log"
	"net/http"
	"os"

	"git.unsupervised.ca/walkies/internal/db"
	"git.unsupervised.ca/walkies/internal/server"
)

func main() {
	// Build MySQL DSN from environment variables
	dbHost := getenv("DB_HOST", "localhost")
	dbPort := getenv("DB_PORT", "3306")
	dbUser := getenv("DB_USER", "root")
	dbPassword := getenv("DB_PASSWORD", "")
	dbName := getenv("DB_NAME", "walkies")
	dsn := fmt.Sprintf("%s:%s@tcp(%s:%s)/%s?parseTime=true", dbUser, dbPassword, dbHost, dbPort, dbName)

	jwtSecret := getenv("JWT_SECRET", "change-me-in-production")
	staticDir := getenv("STATIC_DIR", "./web/dist")
	port := getenv("PORT", "8080")

	database, err := db.Open(dsn)
	if err != nil {
		log.Fatalf("open database: %v", err)
	}
	defer database.Close()

	if err := db.Migrate(context.Background(), database); err != nil {
		log.Fatalf("migrate database: %v", err)
	}

	handler := server.New(database, jwtSecret, staticDir)

	addr := fmt.Sprintf(":%s", port)
	log.Printf("server listening on %s", addr)
	if err := http.ListenAndServe(addr, handler); err != nil {
		log.Fatalf("server error: %v", err)
	}
}

func getenv(key, fallback string) string {
	if v := os.Getenv(key); v != "" {
		return v
	}
	return fallback
}