#!/usr/bin/env bash
# Common functions and variables for all scripts

# Get repository root, with fallback for non-git repositories
get_repo_root() {
    if git rev-parse --show-toplevel >/dev/null 2>&1; then
        git rev-parse --show-toplevel
    else
        # Fall back to script location for non-git repos
        local script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
        cd "$script_dir/../.." && pwd
    fi
}

# Get current branch, with fallback for non-git repositories
get_current_branch() {
    if git rev-parse --abbrev-ref HEAD >/dev/null 2>&1; then
        git rev-parse --abbrev-ref HEAD
    else
        echo "main"  # Default branch name for non-git repos
    fi
}

# Check if we have git available
has_git() {
    git rev-parse --show-toplevel >/dev/null 2>&1
}

check_feature_branch() {
    local branch="$1"
    local has_git_repo="$2"
    
    # For non-git repos, we can't enforce branch naming but still provide output
    if [[ "$has_git_repo" != "true" ]]; then
        echo "[specify] Warning: Git repository not detected; skipped branch validation" >&2
        return 0
    fi
    
    if [[ ! "$branch" =~ ^[0-9]{3}- ]]; then
        echo "ERROR: Not on a feature branch. Current branch: $branch" >&2
        echo "Feature branches should be named like: 001-feature-name" >&2
        return 1
    fi
    
    return 0
}

get_feature_dir() { echo "$1/specs/$2"; }

get_feature_paths() {
    local repo_root=$(get_repo_root)
    local current_branch=$(get_current_branch)
    local has_git_repo="false"
    
    if has_git; then
        has_git_repo="true"
    fi
    
    local feature_dir=$(get_feature_dir "$repo_root" "$current_branch")
    
    cat <<EOF
REPO_ROOT='$repo_root'
CURRENT_BRANCH='$current_branch'
HAS_GIT='$has_git_repo'
FEATURE_DIR='$feature_dir'
FEATURE_SPEC='$feature_dir/spec.md'
IMPL_PLAN='$feature_dir/plan.md'
TASKS='$feature_dir/tasks.md'
RESEARCH='$feature_dir/research.md'
DATA_MODEL='$feature_dir/data-model.md'
QUICKSTART='$feature_dir/quickstart.md'
CONTRACTS_DIR='$feature_dir/contracts'
EOF
}

check_file() { [[ -f "$1" ]] && echo "  ✓ $2" || echo "  ✗ $2"; }
check_dir() { [[ -d "$1" && -n $(ls -A "$1" 2>/dev/null) ]] && echo "  ✓ $2" || echo "  ✗ $2"; }