#!/bin/bash

source /etc/hysteria/core/scripts/utils.sh
source /etc/hysteria/core/scripts/path.sh

# Function to validate all user input fields
validate_inputs() {
    local new_username=$1
    local new_password=$2
    local new_traffic_limit=$3
    local new_expiration_days=$4
    local new_creation_date=$5
    local new_blocked=$6

    # Validate username
    if [ -n "$new_username" ]; then
        if ! [[ "$new_username" =~ ^[a-zA-Z0-9]+$ ]]; then
            echo -e "${red}Error:${NC} Username can only contain letters and numbers."
            exit 1
        fi
    fi

    # Validate traffic limit
    if [ -n "$new_traffic_limit" ]; then
        if ! [[ "$new_traffic_limit" =~ ^[0-9]+$ ]]; then
            echo -e "${red}Error:${NC} Traffic limit must be a valid integer."
            exit 1
        fi
    fi

    # Validate expiration days
    if [ -n "$new_expiration_days" ]; then
        if ! [[ "$new_expiration_days" =~ ^[0-9]+$ ]]; then
            echo -e "${red}Error:${NC} Expiration days must be a valid integer."
            exit 1
        fi
    fi

    # Validate date format
    if [ -n "$new_creation_date" ]; then
        if ! [[ "$new_creation_date" =~ ^[0-9]{4}-[0-9]{2}-[0-9]{2}$ ]]; then
            echo "Invalid date format. Expected YYYY-MM-DD."
            exit 1
        elif ! date -d "$new_creation_date" >/dev/null 2>&1; then
            echo "Invalid date. Please provide a valid date in YYYY-MM-DD format."
            exit 1
        fi
    fi

    # Validate blocked status
    if [ -n "$new_blocked" ]; then
        if [ "$new_blocked" != "true" ] && [ "$new_blocked" != "false" ] && [ "$new_blocked" != "y" ] && [ "$new_blocked" != "n" ]; then
            echo -e "${red}Error:${NC} Blocked status must be 'true', 'false', 'y', or 'n'."
            exit 1
        fi
    fi
}

# Convert 'y'/'n' to 'true'/'false'
convert_blocked_status() {
    local status=$1
    case "$status" in
        y|Y) echo "true" ;;
        n|N) echo "false" ;;
        true|false) echo "$status" ;;
        *) echo "false" ;;  # Default to false if something unexpected
    esac
}

# Function to get user info from users.json
get_user_info() {
    local username=$1
    python3 $CLI_PATH get-user -u "$username"
}

# Function to update user info in users.json
update_user_info() {
    local old_username=$1
    local new_username=$2
    local new_password=$3
    local new_max_download_bytes=$4
    local new_expiration_days=$5
    local new_account_creation_date=$6
    local new_blocked=$7

    if [ ! -f "$USERS_FILE" ]; then
        echo "Error: File '$USERS_FILE' not found."
        return 1
    fi

    echo "Checking if user exists"
    user_exists=$(jq -e --arg username "$old_username" '.[$username]' "$USERS_FILE")
    if [ $? -ne 0 ]; then
        echo "Error: User '$old_username' not found."
        return 1
    fi
    echo "User exists."

    # Get existing user data
    existing_user_data=$(jq --arg username "$old_username" '.[$username]' "$USERS_FILE")
    upload_bytes=$(echo "$existing_user_data" | jq -r '.upload_bytes // 0')
    download_bytes=$(echo "$existing_user_data" | jq -r '.download_bytes // 0')
    status=$(echo "$existing_user_data" | jq -r '.status // "Offline"')

    # Debugging output
    echo "Updating user:"
    echo "Username: $new_username"
    echo "Password: $new_password"
    echo "Max Download Bytes: $new_max_download_bytes"
    echo "Expiration Days: $new_expiration_days"
    echo "Creation Date: $new_account_creation_date"
    echo "Blocked: $new_blocked"

    # Update user fields, only if new values are provided
    jq --arg old_username "$old_username" \
    --arg new_username "$new_username" \
    --arg password "${new_password:-null}" \
    --argjson max_download_bytes "${new_max_download_bytes:-null}" \
    --argjson expiration_days "${new_expiration_days:-null}" \
    --arg account_creation_date "${new_creation_date:-null}" \
    --argjson blocked "$(convert_blocked_status "${new_blocked:-false}")" \
    --argjson upload_bytes "$upload_bytes" \
    --argjson download_bytes "$download_bytes" \
    --arg status "$status" \
    '
    .[$new_username] = .[$old_username] |
    del(.[$old_username]) |
    .[$new_username] |= (
        .password = ($password // .password) |
        .max_download_bytes = ($max_download_bytes // .max_download_bytes) |
        .expiration_days = ($expiration_days // .expiration_days) |
        .account_creation_date = ($account_creation_date // .account_creation_date) |
        .blocked = $blocked |
        .upload_bytes = $upload_bytes |
        .download_bytes = $download_bytes |
        .status = $status
    )' "$USERS_FILE" > tmp.$$.json && mv tmp.$$.json "$USERS_FILE"

    if [ $? -ne 0 ]; then
        echo "Error: Failed to update user '$old_username' in '$USERS_FILE'."
        return 1
    fi

    python3 $CLI_PATH restart-hysteria2

    if [ $? -ne 0 ]; then
        echo "Error: Failed to restart Hysteria service."
        exit 1
    fi
}

# Main function to edit user
edit_user() {
    local username=$1
    local new_username=$2
    local new_traffic_limit=$3
    local new_expiration_days=$4
    local new_password=$5
    local new_creation_date=$6
    local new_blocked=$7

    # Get user info
    user_info=$(get_user_info "$username")
    if [ $? -ne 0 ] || [ -z "$user_info" ]; then
        echo -e "${red}Error:${NC} User '$username' not found."
        exit 1
    fi

    # Extract user info
    local password=$(echo "$user_info" | jq -r '.password')
    local traffic_limit=$(echo "$user_info" | jq -r '.max_download_bytes')
    local expiration_days=$(echo "$user_info" | jq -r '.expiration_days')
    local creation_date=$(echo "$user_info" | jq -r '.account_creation_date')
    local blocked=$(echo "$user_info" | jq -r '.blocked')

    # Validate all inputs
    validate_inputs "$new_username" "$new_password" "$new_traffic_limit" "$new_expiration_days" "$new_creation_date" "$new_blocked"

    # Set new values with validation
    new_username=${new_username:-$username}
    new_password=${new_password:-$password}

    # Convert traffic limit to bytes if provided, otherwise keep existing
    if [ -n "$new_traffic_limit" ]; then
        new_traffic_limit=$(echo "$new_traffic_limit * 1073741824" | bc)
    else
        new_traffic_limit=$traffic_limit
    fi

    new_expiration_days=${new_expiration_days:-$expiration_days}
    new_creation_date=${new_creation_date:-$creation_date}
    new_blocked=$(convert_blocked_status "${new_blocked:-$blocked}")

    # Update user info in JSON file
    update_user_info "$username" "$new_username" "$new_password" "$new_traffic_limit" "$new_expiration_days" "$new_creation_date" "$new_blocked"

    python3 $CLI_PATH restart-hysteria2

    if [ $? -ne 0 ]; then
        echo "Error: Failed to restart Hysteria service."
        exit 1
    fi

    echo "Hysteria service restarted successfully."
}

# Run the script
edit_user "$1" "$2" "$3" "$4" "$5" "$6" "$7"