package main

import (
	"encoding/json"
	"errors"
	"io"
	"net"
	"os"
	"os/exec"
	"path/filepath"
)

func runMap(conn net.Conn, instance string, objmap map[string]interface{}) (int, error) {
	program, has := objmap["package"]
	if !has {
		return 0, errors.New("a package is required")
	}
	arguments, has := objmap["arguments"]
	if !has {
		arguments = ""
	}
	target, has := objmap["target"]
	if !has {
		target = "run"
	}
	workdir, has := objmap["workdir"]
	if !has {
		return 0, errors.New("a workdir is required")
	}
	return run(conn, instance, program.(string), arguments.(string), target.(string), workdir.(string))
}

func run(conn net.Conn, instance string, program string, arguments string, target string, workdir string) (int, error) {
	package_path, err := filepath.Abs(filepath.Join(instance, "apps", program))
	if err != nil {
		return 0, err
	}

	var_path, err := filepath.Abs(filepath.Join(instance, "var", program))
	if err != nil {
		return 0, err
	}

	info_path, err := filepath.Abs(filepath.Join(package_path, "boundaries.json"))
	if err != nil {
		return 0, err
	}
	if exists, err := path_exists(info_path); !exists || err != nil {
		return 0, errors.New("package " + program + " not found")
	}

	working_dir, err := filepath.Abs(workdir)
	if err != nil {
		return 0, err
	}

	infofile_content, err := os.ReadFile(info_path)
	if err != nil {
		return 0, err
	}

	var info map[string]interface{}
	err = json.Unmarshal(infofile_content, &info)
	if err != nil {
		return 0, err
	}

	_, has := info["name"]
	if !has {
		return 0, errors.New("invalid boundaries.json file. name field not found")
	}

	command_interface, has := info["command"]
	if !has {
		return 0, errors.New("invalid boundaries.json file. command field not found")
	}

	commands := command_interface.(map[string]interface{})

	command, has := commands[target]
	if !has {
		return 0, errors.New("target " + target + " not found")
	}

	command, err = filepath.Abs(filepath.Join(package_path, command.(string)))
	if err != nil {
		return 0, err
	}
	cmd := exec.Command("sh", "-c", command.(string)+" "+arguments)
	cmd.Dir = working_dir
	cmd.Env = append(cmd.Environ(), "APP_DIR="+package_path, "VAR_DIR="+var_path)
	cmd.Stdout = io.MultiWriter(conn, os.Stdout)
	cmd.Stderr = io.MultiWriter(conn, os.Stderr)
	cmd.Stdin = conn
	err = cmd.Run()
	if err != nil {
		return 0, err
	}

	return 0, nil
}