package main

import (
	"database/sql"
	"fmt"
	"log"
	"net/http"

	"github.com/go-chi/chi/v5"
	_ "modernc.org/sqlite"
)

// InitDB creates tables if they don't exist.
func InitDB(db *sql.DB) {
	_, err := db.Exec(`CREATE TABLE IF NOT EXISTS todos (
		id          INTEGER PRIMARY KEY AUTOINCREMENT,
		title       TEXT NOT NULL,
		description TEXT,
		due_date    TEXT,
		priority    INTEGER NOT NULL DEFAULT 1,
		status      TEXT NOT NULL DEFAULT 'pending'
	)`)
	if err != nil {
		log.Fatal(err)
	}
}

// NewRouter creates a chi router with all routes.
func NewRouter(db *sql.DB) http.Handler {
	r := chi.NewRouter()
	r.Post("/todos", createTodo(db))
	r.Get("/todos", listTodos(db))
	r.Get("/todos/{id}", getTodo(db))
	r.Put("/todos/{id}", updateTodo(db))
	r.Delete("/todos/{id}", deleteTodo(db))
	return r
}

func main() {
	db, err := sql.Open("sqlite", "file:app.db?mode=rwc")
	if err != nil {
		log.Fatal(err)
	}
	defer db.Close()
	InitDB(db)

	fmt.Println("Server running: http://127.0.0.1:3000")
	log.Fatal(http.ListenAndServe("127.0.0.1:3000", NewRouter(db)))
}