#!/usr/bin/env bash
# Shared Path Utilities
# Sprint: CI/CD Enhancement - Script Consolidation
#
# Purpose: Path manipulation and file operations for CI/CD scripts
# Usage: source "$(dirname "${BASH_SOURCE[0]}")/lib/path-utils.sh"

# Prevent multiple sourcing
if [[ -n "${__STELLAOPS_PATH_UTILS_LOADED:-}" ]]; then
    return 0
fi
export __STELLAOPS_PATH_UTILS_LOADED=1

# Source dependencies
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "${SCRIPT_DIR}/logging.sh" 2>/dev/null || true
source "${SCRIPT_DIR}/exit-codes.sh" 2>/dev/null || true

# ============================================================================
# Path Normalization
# ============================================================================

# Normalize path (resolve .., ., symlinks)
normalize_path() {
    local path="$1"

    # Handle empty path
    if [[ -z "$path" ]]; then
        echo "."
        return 0
    fi

    # Try realpath first (most reliable)
    if command -v realpath >/dev/null 2>&1; then
        realpath -m "$path" 2>/dev/null && return 0
    fi

    # Fallback to Python
    if command -v python3 >/dev/null 2>&1; then
        python3 -c "import os; print(os.path.normpath('$path'))" 2>/dev/null && return 0
    fi

    # Manual normalization (basic)
    echo "$path" | sed 's|/\./|/|g' | sed 's|/[^/]*/\.\./|/|g' | sed 's|//|/|g'
}

# Get absolute path
absolute_path() {
    local path="$1"

    if [[ "$path" == /* ]]; then
        normalize_path "$path"
    else
        normalize_path "$(pwd)/$path"
    fi
}

# Get relative path from one path to another
relative_path() {
    local from="$1"
    local to="$2"

    if command -v realpath >/dev/null 2>&1; then
        realpath --relative-to="$from" "$to" 2>/dev/null && return 0
    fi

    if command -v python3 >/dev/null 2>&1; then
        python3 -c "import os.path; print(os.path.relpath('$to', '$from'))" 2>/dev/null && return 0
    fi

    # Fallback: just return absolute path
    absolute_path "$to"
}

# ============================================================================
# Path Components
# ============================================================================

# Get directory name
dir_name() {
    dirname "$1"
}

# Get base name
base_name() {
    basename "$1"
}

# Get file extension
file_extension() {
    local path="$1"
    local base
    base=$(basename "$path")

    if [[ "$base" == *.* ]]; then
        echo "${base##*.}"
    else
        echo ""
    fi
}

# Get file name without extension
file_stem() {
    local path="$1"
    local base
    base=$(basename "$path")

    if [[ "$base" == *.* ]]; then
        echo "${base%.*}"
    else
        echo "$base"
    fi
}

# ============================================================================
# Directory Operations
# ============================================================================

# Ensure directory exists
ensure_directory() {
    local dir="$1"
    if [[ ! -d "$dir" ]]; then
        mkdir -p "$dir"
    fi
}

# Create temporary directory
create_temp_dir() {
    local prefix="${1:-stellaops}"
    mktemp -d "${TMPDIR:-/tmp}/${prefix}.XXXXXX"
}

# Create temporary file
create_temp_file() {
    local prefix="${1:-stellaops}"
    local suffix="${2:-}"
    mktemp "${TMPDIR:-/tmp}/${prefix}.XXXXXX${suffix}"
}

# Clean temporary directory
clean_temp() {
    local path="$1"
    if [[ -d "$path" ]] && [[ "$path" == *stellaops* ]]; then
        rm -rf "$path"
    fi
}

# ============================================================================
# File Existence Checks
# ============================================================================

# Check if file exists
file_exists() {
    [[ -f "$1" ]]
}

# Check if directory exists
dir_exists() {
    [[ -d "$1" ]]
}

# Check if path exists (file or directory)
path_exists() {
    [[ -e "$1" ]]
}

# Check if file is readable
file_readable() {
    [[ -r "$1" ]]
}

# Check if file is writable
file_writable() {
    [[ -w "$1" ]]
}

# Check if file is executable
file_executable() {
    [[ -x "$1" ]]
}

# ============================================================================
# File Discovery
# ============================================================================

# Find files by pattern
find_files() {
    local dir="${1:-.}"
    local pattern="${2:-*}"
    find "$dir" -type f -name "$pattern" 2>/dev/null
}

# Find files by extension
find_by_extension() {
    local dir="${1:-.}"
    local ext="${2:-}"
    find "$dir" -type f -name "*.${ext}" 2>/dev/null
}

# Find project files (csproj, package.json, etc.)
find_project_files() {
    local dir="${1:-.}"
    find "$dir" -type f \( \
        -name "*.csproj" -o \
        -name "*.fsproj" -o \
        -name "package.json" -o \
        -name "Cargo.toml" -o \
        -name "go.mod" -o \
        -name "pom.xml" -o \
        -name "build.gradle" \
    \) 2>/dev/null | grep -v node_modules | grep -v bin | grep -v obj
}

# Find test projects
find_test_projects() {
    local dir="${1:-.}"
    find "$dir" -type f -name "*.Tests.csproj" 2>/dev/null | grep -v bin | grep -v obj
}

# ============================================================================
# Path Validation
# ============================================================================

# Check if path is under directory
path_under() {
    local path="$1"
    local dir="$2"

    local abs_path abs_dir
    abs_path=$(absolute_path "$path")
    abs_dir=$(absolute_path "$dir")

    [[ "$abs_path" == "$abs_dir"* ]]
}

# Validate path is safe (no directory traversal)
path_is_safe() {
    local path="$1"
    local base="${2:-.}"

    # Check for obvious traversal attempts
    if [[ "$path" == *".."* ]] || [[ "$path" == "/*" ]]; then
        return 1
    fi

    # Verify resolved path is under base
    path_under "$path" "$base"
}

# ============================================================================
# CI/CD Helpers
# ============================================================================

# Get artifact output directory
get_artifact_dir() {
    local name="${1:-artifacts}"
    local base="${GITHUB_WORKSPACE:-$(pwd)}"
    echo "${base}/out/${name}"
}

# Get test results directory
get_test_results_dir() {
    local base="${GITHUB_WORKSPACE:-$(pwd)}"
    echo "${base}/TestResults"
}

# Ensure artifact directory exists and return path
ensure_artifact_dir() {
    local name="${1:-artifacts}"
    local dir
    dir=$(get_artifact_dir "$name")
    ensure_directory "$dir"
    echo "$dir"
}