package main

import (
	"fmt"
	"os"
	"os/exec"
	"path/filepath"
	"time"

	"github.com/theater/picomap/lib/picoserial"
	"github.com/theater/picomap/lib/picotool"
	"github.com/theater/picomap/lib/wire"
)

func main() {
	wd, err := os.Getwd()
	if err != nil {
		fmt.Fprintf(os.Stderr, "error: %v\n", err)
		os.Exit(1)
	}
	buildDir := filepath.Join(wd, "build")

	if err := run(buildDir); err != nil {
		fmt.Fprintf(os.Stderr, "error: %v\n", err)
		os.Exit(1)
	}
}

func run(buildDir string) error {
	fmt.Println("Building...")
	cmd := exec.Command("make", "-C", buildDir)
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	if err := cmd.Run(); err != nil {
		return fmt.Errorf("build failed: %w", err)
	}

	dev, err := picoserial.FindDevice()
	if err != nil {
		return err
	}
	if dev != "" {
		fmt.Printf("Sending bootsel request to %s...\n", dev)
		req, err := wire.EncodeMessage(&wire.RequestBOOTSEL{})
		if err != nil {
			return fmt.Errorf("encoding request: %w", err)
		}
		resp, err := picoserial.SendAndReceive(dev, req, 2*time.Second)
		if err != nil {
			return err
		}
		if len(resp) > 0 {
			msg, err := wire.DecodeMessage(resp)
			if err != nil {
				fmt.Fprintf(os.Stderr, "warning: failed to decode response: %v\n", err)
			} else {
				switch msg.(type) {
				case *wire.ResponseBOOTSEL:
					fmt.Println("Device confirmed reboot into BOOTSEL mode.")
				default:
					fmt.Printf("Unexpected response type: %T\n", msg)
				}
			}
		}
		time.Sleep(2 * time.Second)
	}

	uf2 := filepath.Join(buildDir, "picomap.uf2")
	fmt.Println("Loading firmware...")
	if err := picotool.Load(uf2); err != nil {
		return err
	}

	fmt.Println("Rebooting...")
	_ = picotool.Reboot()

	fmt.Println("Done.")
	return nil
}