#!/usr/bin/env bash

# Word tracking leaderboard module - shows top users in a category

# 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

category="$1"

# If no category specified, list available categories
# shellcheck disable=SC2154
if [[ -z "$category" ]]; then
    msg "$channelName" "$name: Available categories: ${categories[*]}"
    exit 0
fi

# Validate category exists
categoryValid=0
# shellcheck disable=SC2154
for cat in "${categories[@]}"; do
    if [[ "$cat" == "$category" ]]; then
        categoryValid=1
        break
    fi
done

if ((categoryValid == 0)); then
    msg "$channelName" "$name: Invalid category. Available: ${categories[*]}"
    exit 0
fi

# Data directory for this channel
dataDir="triggers/wordtrack/data/${channelName}"

if [[ ! -d "$dataDir" ]]; then
    msg "$channelName" "$name: No tracking data available yet."
    exit 0
fi

# Collect all users' counts for this category
declare -A leaderboard

for userFile in "$dataDir"/*.dat; do
    [[ -f "$userFile" ]] || continue

    userName=$(basename "$userFile" .dat)

    while IFS='=' read -r cat count; do
        if [[ "$cat" == "$category" ]]; then
            leaderboard["$userName"]="$count"
        fi
    done < "$userFile"
done

# Check if anyone has been tracked
if [[ ${#leaderboard[@]} -eq 0 ]]; then
    msg "$channelName" "$name: No one has been tracked in the ${category} category yet."
    exit 0
fi

# Sort users by count (descending)
sortedUsers=()
while IFS= read -r line; do
    sortedUsers+=("$line")
done < <(for user in "${!leaderboard[@]}"; do
    echo "${leaderboard[$user]} $user"
done | sort -rn | head -5)

# Get level names for this category
levelsArrayName="${category}Levels"
declare -n levelsRef="$levelsArrayName"

# Build leaderboard message
leaderParts=()
position=1

for entry in "${sortedUsers[@]}"; do
    count="${entry%% *}"
    userName="${entry#* }"

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

    leaderParts+=("${position}. ${userName}: ${level} (${count} words)")
    ((position++))
done

unset -n levelsRef

msg "$channelName" "$name: Top ${category} users: $(IFS=' | '; echo "${leaderParts[*]}")"