// Copyright © 2026 NAME HERE

package cmd

import (
	"encoding/json"
	"fmt"
	"net/http"
	"os"
	"os/exec"
	"path/filepath"
	"strings"
	"time"

	"github.com/spf13/cobra"
)

// updateCmd represents the update command
var updateCmd = &cobra.Command{
	Use:   "update",
	Short: "Updates all AUR packages.",
	Long:  `Just run apac update.`,
	Run: func(cmd *cobra.Command, args []string) {
		aurRPC := "https://aur.archlinux.org/rpc/v5/info?arg="
		out, err := exec.Command("pacman", "-Qm").Output()
		if err != nil {
			fmt.Fprintln(os.Stderr, err)
			return
		}
		lines := strings.Split(strings.TrimSpace(string(out)), "\n")
		if len(lines) == 0 || (len(lines) == 1 && lines[0] == "") {
			fmt.Println("no aur packages found")
			return
		}

		var toUpdate []string
		for _, l := range lines {
			if l == "" {
				continue
			}
			pkg := strings.Fields(l)[0]

			// fetch AUR version
			aurV := ""
			{
				client := &http.Client{Timeout: 10 * time.Second}
				resp, err := client.Get(aurRPC + pkg)
				if err == nil && resp != nil {
					var m map[string]interface{}
					if err := json.NewDecoder(resp.Body).Decode(&m); err == nil {
						if r, ok := m["results"].([]interface{}); ok && len(r) > 0 {
							if first, ok := r[0].(map[string]interface{}); ok {
								if v, ok := first["Version"].(string); ok {
									aurV = v
								}
							}
						}
					}
					resp.Body.Close()
				}
			}

			// local version
			localV := ""
			{
				out2, err := exec.Command("pacman", "-Qi", pkg).Output()
				if err == nil {
					for _, line := range strings.Split(string(out2), "\n") {
						if strings.HasPrefix(line, "Version") {
							parts := strings.SplitN(line, ":", 2)
							if len(parts) > 1 {
								localV = strings.TrimSpace(parts[1])
							}
							break
						}
					}
				}
			}

			if aurV == "" {
				fmt.Printf("%s: not found in AUR\n", pkg)
			} else if aurV == localV {
				fmt.Printf("%s: up-to-date (%s)\n", pkg, aurV)
			} else if aurV > localV {
				fmt.Printf("%s: update available (AUR=%s local=%s)\n", pkg, aurV, localV)
				toUpdate = append(toUpdate, pkg)
			} else {
				fmt.Printf("%s: local newer (AUR=%s local=%s)\n", pkg, aurV, localV)
			}

			time.Sleep(150 * time.Millisecond) // small delay to be polite to AUR
		}

		if len(toUpdate) == 0 {
			fmt.Println("no updates found")
			return
		}

		// create a temporary work dir under current directory: ./apac-aur-builds-<ts>
		workDir := filepath.Join(".", fmt.Sprintf("apac-aur-builds-%d", time.Now().Unix()))
		if err := os.MkdirAll(workDir, 0o755); err != nil {
			fmt.Fprintln(os.Stderr, "failed to create work dir:", err)
			return
		}
		defer func() {
			// don't remove automatically — user might want to inspect builds
			fmt.Fprintln(os.Stderr, "builds kept in", workDir)
		}()

		// clone, makepkg -si for each package
		for _, p := range toUpdate {
			tarURL := fmt.Sprintf("https://aur.archlinux.org/%s.git", p)
			cloneDir := filepath.Join(workDir, p)

			fmt.Println("cloning", tarURL)
			cloneCmd := exec.Command("git", "clone", "--depth", "1", tarURL, cloneDir)
			cloneCmd.Stdin = os.Stdin
			cloneCmd.Stdout = os.Stdout
			cloneCmd.Stderr = os.Stderr
			if err := cloneCmd.Run(); err != nil {
				fmt.Fprintln(os.Stderr, "git clone failed for", p, ":", err)
				continue
			}

			// run makepkg -si in cloneDir
			fmt.Println("building", p)
			makeCmd := exec.Command("makepkg", "-si", "--noconfirm")
			makeCmd.Dir = cloneDir
			makeCmd.Stdin = os.Stdin
			makeCmd.Stdout = os.Stdout
			makeCmd.Stderr = os.Stderr
			if err := makeCmd.Run(); err != nil {
				fmt.Fprintln(os.Stderr, "makepkg failed for", p, ":", err)
				continue
			}
		}
	},
}

func init() {
	rootCmd.AddCommand(updateCmd)
}