#!/usr/bin/env bash

# spec-kit-extensions branch utilities
# Provides a local implementation of generate_branch_name used by create-* workflows.
# If spec-kit's common.sh already defines it, we don't override.

if ! declare -f generate_branch_name > /dev/null; then
generate_branch_name() {
    local description="$1"

    # Common stop words to filter out
    local stop_words="^(i|a|an|the|to|for|of|in|on|at|by|with|from|is|are|was|were|be|been|being|have|has|had|do|does|did|will|would|should|could|can|may|might|must|shall|this|that|these|those|my|your|our|their|want|need|add|get|set)$"

    # Convert to lowercase and split into words
    local clean_name=$(echo "$description" | tr '[:upper:]' '[:lower:]' | sed 's/[^a-z0-9]/ /g')

    # Filter words: remove stop words and words shorter than 3 chars (unless uppercase acronym in original)
    local meaningful_words=()
    for word in $clean_name; do
        [ -z "$word" ] && continue
        if ! echo "$word" | grep -qiE "$stop_words"; then
            if [ ${#word} -ge 3 ]; then
                meaningful_words+=("$word")
            elif echo "$description" | grep -q "\b${word^^}\b"; then
                meaningful_words+=("$word")
            fi
        fi
    done

    if [ ${#meaningful_words[@]} -gt 0 ]; then
        local max_words=3
        if [ ${#meaningful_words[@]} -eq 4 ]; then max_words=4; fi
        local result=""
        local count=0
        for word in "${meaningful_words[@]}"; do
            if [ $count -ge $max_words ]; then break; fi
            if [ -n "$result" ]; then result="$result-"; fi
            result="$result$word"
            count=$((count + 1))
        done
        echo "$result"
    else
        # Fallback to a simple normalized hyphenated slug of first 3 words
        local cleaned=$(echo "$description" | tr '[:upper:]' '[:lower:]' | sed 's/[^a-z0-9]/-/g' | sed 's/-\+/-/g' | sed 's/^-//' | sed 's/-$//')
        echo "$cleaned" | tr '-' '\n' | grep -v '^$' | head -3 | tr '\n' '-' | sed 's/-$//'
    fi
}
fi