#!/usr/bin/env bash

# Word tracking trigger - monitors messages and tracks word usage

# shellcheck disable=SC1091
[ -f functions.sh ] && source functions.sh
# shellcheck disable=SC1091
[ -f triggers/wordtrack/categories.sh ] && source triggers/wordtrack/categories.sh

name="$1"
channelName="$2"
shift 2
message="$*"

# Sanitize username (extract just the nickname, max 30 chars per IRC RFC)
# Remove any IRC protocol remnants, hostmask info, etc.
name="${name%%!*}"        # Remove hostmask if present
name="${name%%[[:space:]]*}"  # Remove any trailing data
name="${name//[^a-zA-Z0-9_\[\]\{\}\\|\^-]/}"  # Only allow valid IRC nick chars
name="${name:0:30}"       # Limit to max IRC nickname length

# If name is empty or invalid after sanitization, skip
if [[ -z "$name" ]]; then
    exit 0
fi

# Sanitize channel name (remove any IRC protocol remnants)
channelName="${channelName%%[[:space:]]*}"
channelName="${channelName//[^a-zA-Z0-9#_-]/}"

# Only process if we have a valid channel name starting with #
if [[ ! "$channelName" =~ ^#[a-zA-Z0-9_-]+$ ]]; then
    exit 0
fi

# Convert message to lowercase for case-insensitive matching
messageLower="${message,,}"

# Create data directory for this channel if it doesn't exist
dataDir="triggers/wordtrack/data/${channelName}"
mkdir -p "$dataDir"

# User data file
userDataFile="${dataDir}/${name}.dat"

# Load existing user data
declare -A userCounts
if [[ -f "$userDataFile" ]]; then
    while IFS='=' read -r category count; do
        userCounts["$category"]="$count"
    done < "$userDataFile"
fi

# Track which categories had level-ups
declare -a levelUps

# Process each category
# shellcheck disable=SC2154
for category in "${categories[@]}"; do
    # Get the word array and levels array for this category
    levelsArrayName="${category}Levels"

    # Check if message contains any words from this category
    wordCount=0
    wordsArrayNameClean="${category}Words"
    declare -n wordsRef="$wordsArrayNameClean"

    for word in "${wordsRef[@]}"; do
        # Count all occurrences of this word in the message
        wordLower="${word,,}"
        tempMessage="$messageLower"

        # Parse wildcard markers to determine match type
        # * prefix = allow match at end of larger word (e.g., *game matches endgame)
        # * suffix = allow match at start of larger word (e.g., coffee* matches coffeehouse)
        # both = allow match anywhere (e.g., *play* matches gameplay)
        # none = exact word match only (e.g., tea only matches tea)

        prefixWild=false
        suffixWild=false

        if [[ "$wordLower" == \** ]]; then
            prefixWild=true
            wordLower="${wordLower#\*}"
        fi

        if [[ "$wordLower" == *\* ]]; then
            suffixWild=true
            wordLower="${wordLower%\*}"
        fi

        # Build regex pattern based on wildcard markers
        if $prefixWild && $suffixWild; then
            # Match anywhere in text
            pattern="$wordLower"
        elif $prefixWild; then
            # Match at end of word or standalone
            pattern="$wordLower([[:space:][:punct:]]|$)"
        elif $suffixWild; then
            # Match at start of word or standalone
            pattern="(^|[[:space:][:punct:]])$wordLower"
        else
            # Exact word match only
            pattern="(^|[[:space:][:punct:]])$wordLower([[:space:][:punct:]]|$)"
        fi

        # Use word boundary matching based on pattern
        while [[ "$tempMessage" =~ $pattern ]]; do
            ((wordCount++))
            # Remove the matched word to find more occurrences
            # Use the actual matched portion to avoid removing partial matches
            matchedWord="${BASH_REMATCH[0]}"
            tempMessage="${tempMessage/"$matchedWord"/ }"
        done
    done

    unset -n wordsRef

    # If words were found, update the counter
    if ((wordCount > 0)); then
        oldCount="${userCounts[$category]:-0}"
        newCount=$((oldCount + wordCount))
        userCounts["$category"]="$newCount"

        # Check for level-up
        oldLevel=""
        newLevel=""

        # Get the thresholds for this category using nameref
        declare -n levelsRef="$levelsArrayName"

        # Get old level
        for threshold in $(printf '%s\n' "${!levelsRef[@]}" | sort -n); do
            if ((oldCount >= threshold)); then
                oldLevel="${levelsRef[$threshold]}"
            fi
        done

        # Get new level
        for threshold in $(printf '%s\n' "${!levelsRef[@]}" | sort -n); do
            if ((newCount >= threshold)); then
                newLevel="${levelsRef[$threshold]}"
            fi
        done

        # If level changed, record the level-up
        if [[ -n "$newLevel" && "$newLevel" != "$oldLevel" ]]; then
            levelUps+=("$category:$newLevel:$newCount")
        fi

        # Clean up nameref
        unset -n levelsRef
    fi
done

# Save updated user data
: > "$userDataFile"
for category in "${!userCounts[@]}"; do
    echo "${category}=${userCounts[$category]}" >> "$userDataFile"
done

# Announce level-ups
for levelUp in "${levelUps[@]}"; do
    IFS=':' read -r category level count <<< "$levelUp"
    msg "$channelName" "$name just leveled up in ${category}! You are now a ${level} with ${count} words!"
done