package main

import (
	"bytes"
	"encoding/json"
	"flag"
	"fmt"
	"os"
	"os/exec"
	"path/filepath"
	"sort"
	"strings"

	"amadan.net/oficina/estilo.git/credits"
	"amadan.net/oficina/estilo.git/credits/catalog"
)

func main() {
	entry := flag.String("package", "", "production Go package")
	excludes := flag.String("exclude", "", "comma-separated first-party module paths")
	lucide := flag.Bool("lucide", false, "include vendored Lucide and Feather notices")
	onest := flag.Bool("onest", false, "include the Onest font notice (apps that mount theme.FontHandler)")
	flag.Parse()
	if *entry == "" || flag.NArg() != 0 {
		fmt.Fprintln(os.Stderr, "oficina-notices: -package is required")
		os.Exit(2)
	}
	command := exec.Command("go", "list", "-deps", "-json", *entry)
	command.Stderr = os.Stderr
	raw, err := command.Output()
	if err != nil {
		fmt.Fprintln(os.Stderr, "oficina-notices: go list failed")
		os.Exit(1)
	}
	excluded := map[string]bool{}
	for _, name := range strings.Split(*excludes, ",") {
		if name = strings.TrimSpace(name); name != "" {
			excluded[name] = true
		}
	}
	inventory, err := catalog.Collect(bytes.NewReader(raw), excluded)
	if err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
	env, err := exec.Command("go", "env", "-json", "GOROOT", "GOVERSION").Output()
	if err != nil {
		fmt.Fprintln(os.Stderr, "oficina-notices: Go provenance unavailable")
		os.Exit(1)
	}
	var toolchain struct{ GOROOT, GOVERSION string }
	if json.Unmarshal(env, &toolchain) != nil || toolchain.GOROOT == "" || toolchain.GOVERSION == "" {
		fmt.Fprintln(os.Stderr, "oficina-notices: invalid Go provenance")
		os.Exit(1)
	}
	license, err := os.ReadFile(filepath.Join(toolchain.GOROOT, "LICENSE"))
	if err != nil {
		fmt.Fprintln(os.Stderr, "oficina-notices: Go license unavailable")
		os.Exit(1)
	}
	inventory.Components = append(inventory.Components, credits.Component{Name: "Go", Version: toolchain.GOVERSION, SourceURL: "https://go.dev/LICENSE", Notices: []credits.Notice{{Name: "LICENSE", Text: string(license)}}})
	if *lucide {
		inventory.Components = append(inventory.Components, credits.Lucide())
	}
	if *onest {
		inventory.Components = append(inventory.Components, credits.Onest())
	}
	sort.Slice(inventory.Components, func(i, j int) bool { return inventory.Components[i].Name < inventory.Components[j].Name })
	encoder := json.NewEncoder(os.Stdout)
	encoder.SetIndent("", "  ")
	if err := encoder.Encode(inventory); err != nil {
		os.Exit(1)
	}
}