#!/bin/bash
#
# activity-scan.sh - Scan repos and output activity feed JSON
# Usage: ./activity-scan.sh [REPOS_DIR]
#
# Output format matches activity-feed.json spec for maicivy CV
#

set -e

REPOS_DIR="${1:-/home/debian}"

# Repos to showcase on CV
SHOWCASE_REPOS="maicivy vba-mcp-server vba-mcp-monorepo groveengine confluent seogeneratorserver civjdr videotoMP3Transcriptor freelance-dashboard freelance-notify timetrack-pro CTPL"

# GitHub URLs mapping (repo_name -> github_url)
declare -A GITHUB_URLS=(
    ["maicivy"]="https://github.com/AlexisTrouve/maicivy"
    ["confluent"]="https://github.com/AlexisTrouve/confluent"
    ["groveengine"]="https://github.com/AlexisTrouve/GroveEngine"
    ["vba-mcp-server"]="https://github.com/AlexisTrouve/vba-mcp-server"
    ["vba-mcp-monorepo"]="https://github.com/AlexisTrouve/vba-mcp-server"
    ["timetrack-pro"]="https://github.com/AlexisTrouve/timetrack-pro"
    ["freelance-dashboard"]="https://github.com/AlexisTrouve/freelance-dashboard"
    ["freelance-notify"]="https://github.com/AlexisTrouve/freelance-notify"
    ["RedditSaveSaver"]="https://github.com/AlexisTrouve/RedditSaveSaver"
    ["CTPL"]="https://github.com/AlexisTrouve/CTPL"
)

# Category mapping
declare -A CATEGORIES=(
    ["maicivy"]="WIP"
    ["vba-mcp-server"]="WIP"
    ["vba-mcp-monorepo"]="WIP"
    ["groveengine"]="WIP"
    ["confluent"]="WIP"
    ["seogeneratorserver"]="WIP"
    ["civjdr"]="CONSTANT"
    ["videotoMP3Transcriptor"]="DONE"
    ["freelance-dashboard"]="WIP"
    ["freelance-notify"]="WIP"
    ["timetrack-pro"]="WIP"
    ["CTPL"]="DONE"
)

# Escape JSON string
json_escape() {
    printf '%s' "$1" | python3 -c 'import json,sys; print(json.dumps(sys.stdin.read())[1:-1])'
}

# Get languages from file extensions
get_languages() {
    local repo_dir="$1"
    cd "$repo_dir" 2>/dev/null || return

    git ls-files 2>/dev/null | sed 's/.*\.//' | sort | uniq -c | sort -rn | head -5 | while read count ext; do
        case "$ext" in
            go) echo "Go" ;;
            ts|tsx) echo "TypeScript" ;;
            js|jsx) echo "JavaScript" ;;
            py) echo "Python" ;;
            rs) echo "Rust" ;;
            cpp|cc|cxx|hpp) echo "C++" ;;
            c|h) echo "C" ;;
            rb) echo "Ruby" ;;
            java) echo "Java" ;;
            sh|bash) echo "Shell" ;;
            sql) echo "SQL" ;;
            *) ;;
        esac
    done | sort -u | head -4 | tr '\n' ',' | sed 's/,$//'
}

# Start JSON output
echo '{'
echo '  "last_updated": "'$(date -Iseconds)'",'
echo '  "projects": ['

first=true
total_commits_30d=0
active_count=0

for repo_path in "$REPOS_DIR"/*/; do
    [ -d "$repo_path/.git" ] || continue

    name=$(basename "$repo_path")
    cd "$repo_path" 2>/dev/null || continue

    # Get commit counts
    commits_7d=$(git log --since="7 days ago" --oneline 2>/dev/null | wc -l | tr -d ' ')
    commits_30d=$(git log --since="30 days ago" --oneline 2>/dev/null | wc -l | tr -d ' ')
    total_commits_30d=$((total_commits_30d + commits_30d))

    [ "$commits_30d" -gt 0 ] && active_count=$((active_count + 1))

    # Check if showcase
    showcase="false"
    [[ " $SHOWCASE_REPOS " =~ " $name " ]] && showcase="true"

    # Get category
    category="${CATEGORIES[$name]:-WIP}"

    # Get URLs
    github_url="${GITHUB_URLS[$name]:-null}"
    [ "$github_url" != "null" ] && github_url="\"$github_url\""

    gitea_remote=$(git remote get-url origin 2>/dev/null || echo "")
    if [[ "$gitea_remote" == *"git.etheryale.com"* ]]; then
        repo_url="\"https://git.etheryale.com/StillHammer/$name\""
    else
        repo_url="null"
    fi

    # Get description from README or empty
    description=""
    if [ -f "README.md" ]; then
        description=$(head -20 README.md | grep -E "^[A-Za-z]" | head -1 | cut -c1-150)
    fi
    description=$(json_escape "$description")

    # Get languages
    languages=$(get_languages "$repo_path")

    # Get recent commits (last 3)
    recent_commits=""
    while IFS='|' read -r sha msg date author; do
        [ -z "$sha" ] && continue
        msg=$(json_escape "$msg")
        [ -n "$recent_commits" ] && recent_commits="$recent_commits,"
        recent_commits="$recent_commits{\"sha\":\"$sha\",\"message\":\"$msg\",\"date\":\"$date\",\"author\":\"$author\"}"
    done < <(git log -3 --format="%h|%s|%aI|%an" 2>/dev/null)

    # Output JSON
    $first || echo ','
    first=false

    cat <<EOJSON
    {
      "name": "$name",
      "description": "$description",
      "repo_url": $repo_url,
      "github_url": $github_url,
      "category": "$category",
      "showcase": $showcase,
      "languages": [$(echo "$languages" | sed 's/\([^,]*\)/"\1"/g')],
      "commits_7d": $commits_7d,
      "commits_30d": $commits_30d,
      "recent_commits": [$recent_commits]
    }
EOJSON
done

echo '  ],'
echo '  "stats": {'
echo '    "total_commits_30d": '$total_commits_30d','
echo '    "active_projects": '$active_count','
echo '    "showcase_count": '$(echo "$SHOWCASE_REPOS" | wc -w)
echo '  }'
echo '}'