#methods.py

#Imports.
import os, json, discord, random, math
from dotenv import load_dotenv

#Load .env file.
load_dotenv()
PREFIX = os.getenv('BOT_PREFIX')

#######################################################################################
### COMMANDS - ALL COMMANDS MUST BE ALL LOWERCASE, NO SPACES, WITH A PREFIX OF CMD_ ###
#######################################################################################

async def cmd_hello(ctx):
    await ctx.send("Hello, World!")

async def cmd_goodbye(ctx):
    await ctx.send("Goodbye!")

async def cmd_whatareyou(ctx):
    await ctx.send("An idiot sandwich.")

#Add points for a user.
async def cmd_addpoints(ctx, member: discord.Member = None, number = None):

    points_data = loadpoints() #Load all point history into a variable.
    member = member or ctx.author #Set the target equal to the user specified OR the sender of the message.
    user_id = str(member.id) #Sets the user ID equal to the ID of the user specified.
    pointAmount = number or 1 #Makes the amount to add either the amount specified, or just 1.
    points_data[user_id] = points_data.get(user_id, 0) + int(pointAmount) #Add the desired amount of points to the user.
    loadpoints(points_data) #Reload the points data.
    await ctx.send(f"{member.mention} now has {points_data[user_id]} points!")

#Checks the current points of a user.
async def cmd_checkpoints(ctx, member: discord.Member = None):

    points_data = loadpoints() #Load all point history into a variable.
    member = member or ctx.author  # Checks either the member specified, or the sender of the message.
    user_id = str(member.id) #Set the user ID equal to the ID of the user specified.
    points = points_data.get(user_id, 0) #Retrieve the points of the user ID.
    await ctx.send(f"{member.mention} has {points} points.")

#Add a custom command to customcommands.json.
async def cmd_addcommand(ctx, command, *message):

    response = (" ".join(message)) #Takes in the custom message.
    commands_temp = loadcommands("commands.json") #Load the built-in commands to a temp variable.
    customcommands_temp = loadcommands("customcommands.json") #Load the custom commands to a temp variable.

    #Checks to see if the command already exists in commands.json.
    if command in commands_temp:
        await ctx.send(f"Command '{command}' already exists in base commands! Not overwriting.")
        return

    #Checks to see if the command already exists in customcommands.json.
    if command in customcommands_temp:
        await ctx.send(f"Command '{command}' already exists in custom commands! Not overwriting.")
        return

    #Takes the response, and adds it to the customcommands.json file.
    customcommands_temp[command] = response
    with open("customcommands.json", "w", encoding="utf-8") as file:
        json.dump(customcommands_temp, file, indent=4)

    await ctx.send(f"Command '{command}' added successfully!")

#Lists all built-in and custom commands currently set up.
async def cmd_listcommands(ctx):

    try:
        #Loads both custom and built-in commands to temp variables.
        commands_dict = loadcommands("commands.json")
        customcommands_dict = loadcommands("customcommands.json")

        #Adds each set of commands into a list variable, then displays it.
        commands_list = "\n".join([f"{PREFIX}**{cmd}**" for cmd, resp in commands_dict.items()])
        await ctx.send(f"**Available Built-In Commands:**\n\n{commands_list}")

        #Checks to see if there are any custom commands, and then lists them if there are any.
        with open ("customcommands.json", 'r') as file:
            data = json.load(file)
            if data != {}:
                customcommands_list = "\n".join([f"{PREFIX}**{cmd}**" for cmd, resp in customcommands_dict.items()])
                await ctx.send(f"\n\n**Available Custom Commands:**\n\n{customcommands_list}\n\n")

    #Exception for failing to load commands. Typically indicates a missing commands.json file.
    except Exception as e:
        await ctx.send(f"Error loading commands: {e}")

#Rolls a dice roll. Supports modifiers as well.
async def cmd_roll(ctx, inputValue, sign = None, addition = None):

    #Initializing variables for the subtotal and total.
    subtotal = 0
    total = 0

    #Rolls the dice.
    try:
        #Splits the input into variables separated by the letter 'd', for number of sides, and how many sides.
        number, sides = map(int, inputValue.lower().split('d'))

        #For however many times you roll, it passes the number of sides to a rolldie function, and adds the result to subtotal.
        for _ in range(number):
            subtotal += rolldie(sides)

        #Checks to see if any modifiers were applied. If so, apply the logic.
        if sign and addition:
            total = subtotal
            addition = int(addition) #Explicitly converts the modifier value to an integer.
            if sign == '+': #Addition.
                total = subtotal + addition
            elif sign == '-': #Subtraction.
                total = subtotal - addition
            elif sign in ('*', 'X', 'x'): #Multiplication.
                total = subtotal * addition
            elif sign == '/': #Division, rounding down.
                total = math.floor(subtotal / addition)
            else:
                await ctx.send("Invalid mathematical sign passed.")
            await ctx.send(f"You rolled a total of {total} ({subtotal} {sign} {addition}).")
        else:
            await ctx.send(f"You rolled a total of {subtotal}.")
    except ValueError as e:
        await ctx.send(f"Invalid input - {e}.")

########################################################
### INTERNAL METHODS - ALL METHODS MUST BE LOWERCASE ###
########################################################

#Loads commands into variable.
def loadcommands(filename):
    if not os.path.exists(filename):
        with open(filename, "w", encoding="utf-8") as file:
            json.dump({}, file)  # Create an empty JSON file

    with open(filename, "r", encoding="utf-8") as file:
        return json.load(file)

#Loads points into variable.
def loadpoints():
    if not os.path.exists("points.json"):
        with open("points.json", "w", encoding="utf-8") as file:
            json.dump({}, file)  # Create an empty JSON file

    with open("points.json", "r", encoding="utf-8") as file:
        return json.load(file)

# Saves points to the points.json file.
def savepoints(points_data):
    with open("points.json", "w", encoding="utf-8") as file:
        json.dump(points_data, file, indent=4)

#Rolls die for cmd_roll
def rolldie(sides):
    return random.randint(1, sides)