// Dagger pipeline for multi-platform builds.
// Requires: go install dagger.io/dagger@latest && go mod tidy
package main

import (
	"context"
	"fmt"
	"os"

	"dagger.io/dagger"
)

func main() {
	ctx := context.Background()
	client, err := dagger.Connect(ctx, dagger.WithLogOutput(os.Stdout))
	if err != nil {
		panic(err)
	}
	defer client.Close()

	platforms := []struct {
		OS   string
		Arch string
	}{
		{"darwin", "arm64"},
		{"darwin", "amd64"},
		{"windows", "amd64"},
		{"linux", "amd64"},
	}

	src := client.Host().Directory(".")

	for _, p := range platforms {
		binName := fmt.Sprintf("valhallir-deconvolver-%s-%s", p.OS, p.Arch)
		if p.OS == "windows" {
			binName += ".exe"
		}

		ctr := client.Container().From("golang:1.24.5").
			WithMountedDirectory("/src", src).
			WithWorkdir("/src").
			WithEnvVariable("GOOS", p.OS).
			WithEnvVariable("GOARCH", p.Arch).
			WithExec([]string{"go", "build", "-o", binName, "."})

		// Export the binary from the container to the host's dist/ directory
		outPath := fmt.Sprintf("dist/%s", binName)
		_, err := ctr.File(binName).Export(ctx, outPath)
		if err != nil {
			panic(fmt.Sprintf("export failed for %s/%s: %v", p.OS, p.Arch, err))
		}
		fmt.Printf("Built and exported %s\n", outPath)
	}
}