#!/bin/bash
/**
 * @file generate_docs.sh
 * @brief Generate documentation for Automotive RTOS
 */

set -e

# Script directory
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"

# Color codes
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m'

# Documentation directories
DOCS_DIR="${PROJECT_ROOT}/docs"
BUILD_DOCS_DIR="${PROJECT_ROOT}/build/docs"
DOXYGEN_DIR="${BUILD_DOCS_DIR}/doxygen"
HTML_DIR="${DOXYGEN_DIR}/html"
PDF_DIR="${DOXYGEN_DIR}/pdf"

# Print banner
echo -e "${BLUE}========================================${NC}"
echo -e "${BLUE}  Documentation Generator${NC}"
echo -e "${BLUE}========================================${NC}"
echo ""

# Check for doxygen
check_doxygen() {
    if ! command -v doxygen >/dev/null 2>&1; then
        echo -e "${YELLOW}Doxygen not found. Installing...${NC}"
        sudo apt-get install -y doxygen graphviz
    fi
}

# Check for other tools
check_tools() {
    # LaTeX for PDF generation
    if ! command -v pdflatex >/dev/null 2>&1; then
        echo -e "${YELLOW}LaTeX not found. PDF generation will be skipped.${NC}"
        GENERATE_PDF=false
    else
        GENERATE_PDF=true
    fi

    # Graphviz for diagrams
    if ! command -v dot >/dev/null 2>&1; then
        echo -e "${YELLOW}Graphviz not found. Installing...${NC}"
        sudo apt-get install -y graphviz
    fi
}

# Generate doxygen configuration
generate_doxygen_config() {
    echo -e "${YELLOW}Generating Doxygen configuration...${NC}"

    cat > "${BUILD_DOCS_DIR}/Doxyfile" << EOF
# Doxygen configuration for Automotive RTOS

# Project information
PROJECT_NAME           = "Automotive RTOS"
PROJECT_NUMBER         = "1.0.0"
PROJECT_BRIEF          = "Real-time operating system for automotive applications"
OUTPUT_DIRECTORY       = ${DOXYGEN_DIR}

# Source files
INPUT                  = ${PROJECT_ROOT}/kernel \
                         ${PROJECT_ROOT}/drivers \
                         ${PROJECT_ROOT}/middleware \
                         ${PROJECT_ROOT}/applications \
                         ${PROJECT_ROOT}/config \
                         ${PROJECT_ROOT}/board \
                         ${PROJECT_ROOT}/README.md

# Include paths
INCLUDE_PATH           = ${PROJECT_ROOT}/kernel/include \
                         ${PROJECT_ROOT}/drivers/include \
                         ${PROJECT_ROOT}/middleware \
                         ${PROJECT_ROOT}/config

# File patterns
FILE_PATTERNS          = *.c *.h *.md
RECURSIVE              = YES

# Output formats
GENERATE_HTML          = YES
GENERATE_LATEX         = ${GENERATE_PDF}
GENERATE_RTF           = NO
GENERATE_XML           = YES
GENERATE_MAN           = NO

# HTML output
HTML_OUTPUT            = html
HTML_FILE_EXTENSION    = .html
GENERATE_TREEVIEW      = YES
DISPLAY_GRAPH          = YES

# LaTeX output
LATEX_OUTPUT           = pdf
COMPACT_LATEX          = YES
PDF_HYPERLINKS         = YES
USE_PDFLATEX           = YES

# Diagrams
HAVE_DOT               = YES
DOT_GRAPH_MAX_NODES    = 50
CALL_GRAPH             = YES
CALLER_GRAPH           = YES
CLASS_GRAPH            = YES
COLLABORATION_GRAPH    = YES
INCLUDE_GRAPH          = YES
INCLUDED_BY_GRAPH      = YES

# Code documentation
EXTRACT_ALL            = YES
EXTRACT_PRIVATE        = YES
EXTRACT_STATIC         = YES
EXTRACT_LOCAL_CLASSES  = YES
HIDE_UNDOC_MEMBERS     = NO
HIDE_UNDOC_CLASSES     = NO

# Warnings
WARNINGS               = YES
WARN_IF_UNDOCUMENTED   = YES
WARN_IF_DOC_ERROR      = YES
WARN_NO_PARAMDOC       = YES

# Source browser
SOURCE_BROWSER         = YES
INLINE_SOURCES         = YES
REFERENCED_BY_RELATION = YES
REFERENCES_RELATION    = YES

# Search engine
SEARCHENGINE           = YES
SERVER_BASED_SEARCH    = NO

# Colors
HTML_COLORSTYLE_HUE    = 220
HTML_COLORSTYLE_SAT    = 100
HTML_COLORSTYLE_GAMMA  = 80
EOF

    echo -e "${GREEN}✓ Doxygen configuration generated${NC}"
}

# Generate API documentation
generate_api_docs() {
    echo -e "${YELLOW}Generating API documentation...${NC}"

    mkdir -p "${DOCS_DIR}/api"

    # Extract function documentation from headers
    for header in "${PROJECT_ROOT}"/kernel/include/*.h; do
        if [ -f "$header" ]; then
            basename=$(basename "$header" .h)
            output="${DOCS_DIR}/api/${basename}.md"

            echo "# ${basename} API Documentation" > "$output"
            echo "" >> "$output"
            echo "Auto-generated documentation for ${header}" >> "$output"
            echo "" >> "$output"

            # Extract function prototypes
            grep -E "^(KernelStatus_t|void|uint|int|bool|float|TaskHandle_t)" "$header" | \
                while read -r line; do
                    echo "\`\`\`c" >> "$output"
                    echo "$line" >> "$output"
                    echo "\`\`\`" >> "$output"
                    echo "" >> "$output"
                done
        fi
    done

    echo -e "${GREEN}✓ API documentation generated${NC}"
}

# Generate architecture documentation
generate_architecture_docs() {
    echo -e "${YELLOW}Generating architecture documentation...${NC}"

    mkdir -p "${DOCS_DIR}/architecture"

    cat > "${DOCS_DIR}/architecture/system_overview.md" << 'EOF'
# System Architecture Overview

## Introduction

The Automotive RTOS is designed for safety-critical automotive applications.
It provides deterministic real-time performance with priority-based preemptive scheduling.

## System Layers

1. **Application Layer**
   - Engine Control
   - Brake Control
   - Body Control
   - Dashboard

2. **Middleware Layer**
   - CAN Stack (ISO 15765-2)
   - Network Management
   - Diagnostics (UDS, OBD-II)
   - Safety Features

3. **Driver Layer**
   - CAN Driver
   - UART Driver
   - SPI Driver
   - I2C Driver
   - GPIO Driver
   - ADC Driver
   - PWM Driver

4. **Kernel Layer**
   - Task Management
   - Scheduler
   - Synchronization
   - Memory Management
   - Interrupt Handling

## Design Principles

- Deterministic scheduling
- Priority inheritance
- Memory protection
- Stack overflow detection
- Fault tolerance
- Watchdog integration
- E2E protection

## Safety Features

- ISO 26262 compliance
- ASIL-D ready
- Redundancy support
- Fault detection
- Safe state management
EOF

    echo -e "${GREEN}✓ Architecture documentation generated${NC}"
}

# Generate user guide
generate_user_guide() {
    echo -e "${YELLOW}Generating user guide...${NC}"

    mkdir -p "${DOCS_DIR}/user_guide"

    cat > "${DOCS_DIR}/user_guide/getting_started.md" << 'EOF'
# Getting Started Guide

## Prerequisites

- ARM GCC toolchain
- CMake 3.10+
- Make
- Git

## Installation

1. Clone repository:
   ```bash
   git clone https://github.com/automotive-rtos/rtos.git
   cd rtos