package main

import (
	"fmt"
	"os"
	"path/filepath"
	"qulay/database"
	"qulay/config"
	"qulay/package"
	"qulay/helpers"
	"slices"
	"strings"
)

var _name string = filepath.Base(os.Args[0])
var _cmds = []string{"h", "+", "-", "g", "s", "p", "u", "r", "q", "v"}
var _root_cmds = []string{"+", "-", "u", "i"}

const _version string = "0.5"
const _help string = `{_name}: command-line interface to the Qulay Package Manager
Usage:
    {_name} h       -> help menu
    {_name} + pkg   -> download and install package
    {_name} - pkg   -> remove package
    {_name} g pkg   -> get package version
    {_name} s pkg   -> search packages by name
    {_name} p repo  -> purge local repo directory
    {_name} u       -> update all repositories
    {_name} r       -> get all repositories URLs
    {_name} q       -> get all installed packages
    {_name} v       -> get {_name} version
Options:
    :v   -> verbose output
    :a   -> ask before doing
    :nl  -> disable recording in databases and logs
    :nd  -> do not download deps
    :r   -> reinstall already installed deps
Vars:
    DESTDIR  -> path where the package will be installed/removed`

func parseArgs(args []string) ([]string, []string, []string) {
	var cmds, oths, opts []string
	for _, arg := range args {
		if strings.HasPrefix(arg, ":") {
			opts = append(opts, arg)
		} else if slices.Contains(_cmds, arg) && len(cmds) < 1 {
			cmds = append(cmds, arg)
		} else {
			oths = append(oths, arg)
		}
	}
	return cmds, oths, opts
}

func printHelp() {
	r := strings.NewReplacer("{_name}", _name)
	fmt.Println(r.Replace(_help))
}

func main() {
	var args []string = os.Args[1:]
	cmds, oths, opts := parseArgs(args)

	destDir := os.Getenv("DESTDIR")
	if destDir == "" {
		destDir = "/"
	}

	if len(args) == 0 || len(cmds) == 0 {
		printHelp()
		os.Exit(1)
	}

	if os.Getuid() != 0 && slices.Contains(_root_cmds, cmds[0]) {
		fmt.Println("!! this command is root-only. run this with root privileges")
		os.Exit(1)
	}

	// fmt.Println(cmds, oths, opts)
	if cmds[0] == "h" {
		printHelp()
	} else if cmds[0] == "+" {
		if len(oths) < 1 {
			fmt.Println("!! no package(s) received")
			os.Exit(1)
		}
		for _, n := range oths {
			err := pkg.Install(n, opts, destDir)
			if err != nil {
				fmt.Println("!!", err)
				os.Exit(1)
			}
		}
	} else if cmds[0] == "-" {
		if len(oths) < 1 {
			fmt.Println("!! no package(s) received")
			os.Exit(1)
		}
		for _, n := range oths {
			err := pkg.Remove(n, opts, destDir) 
			if err != nil {
				fmt.Println("!!", err)
				os.Exit(1)
			}
		}
	} else if cmds[0] == "u" {
		database.DownloadRepos(database.GetReposUrls(), destDir)
	} else if cmds[0] == "g" {
		if len(oths) < 1 {
			fmt.Println("!! no package(s) received")
			os.Exit(1)
		}
		for _, name := range oths {
			fmt.Println(database.GetPackageVersion(name, destDir))
		}
	} else if cmds[0] == "r" {
		for _, url := range database.GetReposUrls() {
			fmt.Println(url)
		}
	} else if cmds[0] == "q" {
		for name, version := range database.ReadInstalled(destDir) {
			fmt.Println(name, "-", version[0])
		}
	} else if cmds[0] == "s" {
		if len(oths) < 1 {
			pkgs := pkg.GetPackages(destDir)
			for _, p := range pkgs {
				if database.IsInstalled(p.Repo + "/" + p.Name, destDir) {
					fmt.Printf("[+] %s/%s - %v - %v\n", p.Repo, p.Name, p.Data[0], p.Data[1])
				} else {
					fmt.Printf("    %s/%s - %v - %v\n", p.Repo, p.Name, p.Data[0], p.Data[1])
				}
			}
		} else {
			for _, n := range oths {
				pkgs := pkg.FindPackages(n, destDir)
				for _, p := range pkgs {
					if database.IsInstalled(p.Repo + "/" + p.Name, destDir) {
						fmt.Printf("[+] %s/%s - %v - %v\n", p.Repo, p.Name, p.Data[0], p.Data[1])
					} else {
						fmt.Printf("    %s/%s - %v - %v\n", p.Repo, p.Name, p.Data[0], p.Data[1])
					}
				}
			}
		}
	} else if cmds[0] == "p" {
		if slices.Contains(opts, ":a") {
			if !helpers.Ask("do you want purge repo(s)?") {
				os.Exit(1)
			}
		}
		if len(oths) >= 1 {
			for _, n := range oths {
				err := database.PurgeRepository(n, destDir)
				if err != nil {
					fmt.Println("!!", err)
					os.Exit(1)
				} else {
					fmt.Println(":: deleted", n, "repository in", paths.ReposDir)
				}
			}
		}
	} else if cmds[0] == "v" {
		fmt.Println(_version)
	} else {
		fmt.Println("w! unknown command:", cmds[0])
		printHelp()
		os.Exit(1)
	}
}