import sys
import os
import xml.etree.ElementTree as ET
import requests
import shutil

DEFAULT_SPIGOT_VER = "LATEST"
POM_NAMESPACE = "http://maven.apache.org/POM/4.0.0"
DEV_SERVER_PATH="development_server/"

# Command from: https://maven.apache.org/guides/getting-started/maven-in-five-minutes.html
MVN_CMD = "mvn -B archetype:generate -DgroupId={groupId} -DartifactId={artifactId} -DarchetypeArtifactId=maven-archetype-quickstart"

BUILDTOOLS_URL = "https://hub.spigotmc.org/jenkins/job/BuildTools/lastSuccessfulBuild/artifact/target/BuildTools.jar"
BUILDTOOLS_CMD = "java -jar BuildTools.jar --rev {ver}"
BUILDTOOLS_DIR = "buildtools/"
DEFAULT_SERVER_VER = "latest"
DEFAULT_JVM_DEBUG_PORT = 25577


if sys.version_info.major != 3:
    print("Script requires Python3 to run. You are currently running {0}.".format(sys.version))
    exit(1)

if (os.getcwd().endswith("scripts/")):
    os.chdir("../")

def project_gen() -> int:
    print("Generate Project:")
    print("Step 1) Generate Maven project.")

    groupId = input("groupId (package): xyz.reslate.")
    while (len(groupId) == 0 or (not groupId.islower() and not groupId.isupper()) or (groupId.isupper())):
        print("GroupId cannot be empty and must be all lowercase.")
        groupId = "xyz.reslate." + input("groupId (package): xyz.reslate.")

    artifactId = input("artifactId (name of plugin): ")
    while (len(artifactId) == 0 or (not artifactId.islower() and not artifactId.isupper()) or (artifactId.isupper())):
        print("artifactId cannot be empty and must be all lowercase.")
        artifactId = input("artifactId (name of plugin):")

    print("Executing Maven command: \"{0}\"".format(MVN_CMD.format(groupId = groupId, artifactId = artifactId)))
    if (os.system(MVN_CMD.format(groupId = groupId, artifactId = artifactId)) != 0):
        print("An error occurred while executing Maven step. Stopping.")
        return 1

    print("Step 2) Modify pom.xml")
    spigotver = input("Spigot dependency version (default: \"{0}\"): ".format(DEFAULT_SPIGOT_VER))
    if (len(spigotver) == 0): spigotver = DEFAULT_SPIGOT_VER

    spigotvercheck = input("Using \"{0}\". Is this fine? (Y/n)".format(spigotver))
    if (len(spigotvercheck) == 0): spigotvercheck = "y"
    while (spigotvercheck.lower() != "y"):
        if spigotvercheck.lower() == "n":
            spigotver = input("Spigot dependency version (Maven Dep. Ver.): ")
            spigotvercheck = input("Entered \"{0}\". Is this fine? (Y/n)".format(spigotver))
        else:
            spigotvercheck = input("Please enter \"y\" to continue, or \"n\" to enter version again: ")
    print("Using version: \"{0}\"".format(spigotver))

    pompath = "{0}/pom.xml".format(artifactId);
    ET.register_namespace("", POM_NAMESPACE)
    pomxml = ET.parse(pompath)
    pomroot = pomxml.getroot()

    repositorieselem = ET.Element("repositories")
    repositoryelem = ET.SubElement(repositorieselem, "repository")
    ET.SubElement(repositoryelem, "id").text = "spigot-repo"
    ET.SubElement(repositoryelem, "url").text = "https://hub.spigotmc.org/nexus/content/repositories/public/"

    pomroot.append(repositorieselem)

    spigotdep = ET.Element("dependency")
    ET.SubElement(spigotdep, "groupId").text = "org.spigotmc"
    ET.SubElement(spigotdep, "artifactId").text = "spigot-api"
    ET.SubElement(spigotdep, "version").text = spigotver
    ET.SubElement(spigotdep, "type").text = "jar"
    ET.SubElement(spigotdep, "scope").text = "provided"

    dependencies = pomroot.find("{" + POM_NAMESPACE + "}" + "dependencies")
    dependencies.append(spigotdep)

    pomxml.write(pompath)

    print("Step 3) Validate pom.xml")
    if os.system("mvn -B validate -f {0}".format(pompath)) != 0:
        print("An error has occurred. Please check output and fix issue before running again.")
        return 1
    print("pom.xml validated.")

    print("Step 4) Resolve dependencies")
    if os.system("mvn -B dependency:resolve -f {0}".format(pompath)) != 0:
        print("An error has occurred. Please check output and fix issue before running again.")
        return 1
    print("Project generation complete.")
    return 0

def gen_dev_server() -> int:
    print("Generate Development Server:")
    if not os.path.exists(DEV_SERVER_PATH):
        os.mkdir(DEV_SERVER_PATH)
    os.chdir(DEV_SERVER_PATH)

    print("Step 1) Download BuildTools")
    os.mkdir(BUILDTOOLS_DIR)
    os.chdir(BUILDTOOLS_DIR)

    buildtoolrequest = requests.get(BUILDTOOLS_URL, allow_redirects=True)
    buildtoolsfile = open("BuildTools.jar", "wb")
    buildtoolsfile.write(buildtoolrequest.content)
    buildtoolsfile.close()

    print("Step 2) Generate server JAR with BuildTools.jar")

    spigotver = input("Spigot version to use (buildtools rev.) (default: \"{0}\"): ".format(DEFAULT_SERVER_VER))
    if (len(spigotver) == 0): spigotver = DEFAULT_SERVER_VER
    spigotververify = input("Attempt to use \"{0}\"? (Y/n)".format(spigotver))
    if (len(spigotververify) == 0): spigotververify = "y"
    while spigotververify.lower() != "y":
        if (spigotververify.lower() == "n"):
            spigotver = input("Spigot version to use: ")
            spigotververify = input("Attempt to use \"{0}\"? (Y/n)".format(spigotver))
        else:
            spigotververify = input("Attempt to use \"{0}\"? Please enter \"y\" or \"n\": ".format(spigotver))

    if os.system(BUILDTOOLS_CMD.format(ver = spigotver)) != 0:
        print("Error while running build tools.")
        return 1

    print("Step 3) Moving JARs and cleaning up.")
    
    print("Moving generated JAR file.")
    if spigotver == DEFAULT_SERVER_VER:
        direntries = os.listdir()
        for entry in direntries:
            if (entry.startswith("spigot") and entry.endswith(".jar")):
                shutil.move(entry, "../spigot.jar")
    else:
        shutil.move("spigot-{0}.jar".format(spigotver), "../spigot.jar")

    os.chdir("../")
    print("Deleting \"{0}\".".format(BUILDTOOLS_DIR))
    shutil.rmtree(BUILDTOOLS_DIR)

    os.chdir("../")
    print("Done generating files for development server.")
    return 0

def reset() -> None:
    pomxmldir = find_pomxmldir()
    if len(pomxmldir) != 0:
        shutil.rmtree(pomxmldir)
        print("Deleted Maven project directory.")
    
    if os.path.exists(DEV_SERVER_PATH):
        shutil.rmtree(DEV_SERVER_PATH)
        print("Deleted development server directory.")

def find_pomxml() -> str:
    return find_pomxmldir() + "/pom.xml"

def find_pomxmldir() -> str:
    directories = os.listdir()
    
    for directory in directories:
        if os.path.isdir(directory) and "pom.xml" in os.listdir(directory):
            return directory
    return ""

def __printhelp():
    print("usage: {0} <setup | project | server | reset>".format(sys.argv[0]))

if __name__ == "__main__":
    if len(sys.argv) != 2:
        __printhelp()
        exit(1)
    else:
        if sys.argv[1] == "setup":
            if project_gen() != 0: exit(1)
            if gen_dev_server() != 0: exit(1)
        elif sys.argv[1] == "project":
            if project_gen() != 0: exit(1)
        elif sys.argv[1] == "server":
            if gen_dev_server() != 0: exit(1)
        elif sys.argv[1] == "reset":
            reset()
        else:
            __printhelp()
            exit(1)