#!/usr/bin/env bash
#
# SPDX-License-Identifier: GPL-2.0
#
# Copyright (c) 2026 AMLOGIC
#
# OPTEE video firmware build script for AMLbian
# This script builds OPTEE video firmware components package

set -e

# Get script directory
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
AMLBIAN_DIR="$(dirname "${SCRIPT_DIR}")"
AMLBIAN_DIR="$(dirname "${AMLBIAN_DIR}")"  # Go up one more level from multimedia/tee
AMLBIAN_DIR="$(dirname "${AMLBIAN_DIR}")"  # Go up one more level from scripts
BUILD_DIR="${AMLBIAN_DIR}/../build"
MODULE_BUILD_DIR="${SRC}/output/.tmp"


# ==============================================================================
# Section 2: Default Configuration
# ==============================================================================

PLATFORM_TDK_VERSION="${PLATFORM_TDK_VERSION:-v3.18.0}"
TDK_VERSION="${TDK_VERSION:-v3.8/dev/S905D5}"
ARCH="${ARCH:-arm64}"
BOARD="${BOARD:-s6-bq201}"

# ==============================================================================
# Section 4: OPTEE Video Firmware Build Functions
# ==============================================================================

# Map architecture to ARM_TARGET for OPTEE video firmware
function __get_optee_video_arm_target() {
    local arch="${1}"
    case "${arch}" in
        "arm"|"armhf")
            echo "arm.aapcs-linux.hard"
            ;;
        "arm64"|"aarch64")
            echo "aarch64.lp64."
            ;;
        *)
            aml_log error "OPTEE-VIDEO-FIRMWARE" "Unsupported architecture: ${arch}"
            exit 1
            ;;
    esac
}

# Validate TDK version
function __validate_tdk_version() {
    local platform_tdk_version="${1}"
    local tdk_version="${2}"
    
    case "${platform_tdk_version}" in
        "v2.4.4"|"v3.8.0"|"v3.18.0"|"v4.4.0")
            ;;
        *)
            aml_log error "OPTEE-VIDEO-FIRMWARE" "Unsupported platform TDK version: ${platform_tdk_version}"
            aml_log info "OPTEE-VIDEO-FIRMWARE" "Supported versions: v2.4.4, v3.8.0, v3.18.0, v4.4.0"
            exit 1
            ;;
    esac

    case "${tdk_version}" in
        "v2.4"|"v3.8"|"v3.8/dev/S905D5"|v3.8/dev/A311Y3)
            ;;
        *)
            aml_log error "OPTEE-VIDEO-FIRMWARE" "Unsupported TDK version: ${tdk_version}"
            aml_log info "OPTEE-VIDEO-FIRMWARE" "Supported versions: v2.4 v3.8 v3.8/dev/S905D5"
            exit 1
            ;;
    esac
}

# Get video firmware source path
function __get_video_firmware_source_path() {
    
    # Try to find TDK in aml-comp
    local aml_comp_path="$(amlbian_get_aml_comp_dir)"
    if [[ -z "${aml_comp_path}" ]] || [[ ! -d "${aml_comp_path}" ]]; then
        aml_log error "OPTEE-VIDEO-FIRMWARE" "aml-comp not found"
        exit 1
    fi
    
    # Based on Yocto recipe: S = "${WORKDIR}/git/secfirmload/secloadbin"
    local firmware_path="${aml_comp_path}/multimedia/secfirmload/secloadbin"
    
    # Fallback: check if files are in ca_export directories
    if [[ ! -d "${firmware_path}" ]]; then
        aml_log error "OPTEE-VIDEO-FIRMWARE" "Video firmware directory not found: ${firmware_path}"
        exit 1
    fi
    
    echo "${firmware_path}"
}

# Helper: Map architecture to ca_export directory name
function __get_arm_export_target() {
    local arch="${1}"
    case "${arch}" in
        "arm"|"armhf")
            echo "ca_export_arm"
            ;;
        "arm64"|"aarch64")
            echo "ca_export_arm64"
            ;;
        *)
            echo ""
            ;;
    esac
}

# Main Installation Function
function __optee_video_firmware_install() {
    local install_dir="${1}"
    local platform_tdk_version="${PLATFORM_TDK_VERSION}"
    local tdk_version="${TDK_VERSION}"
    local arch="${ARCH}"

    #__validate_tdk_version "${platform_tdk_version}" "${tdk_version}"
    
    # Determine ARM_TARGET for video firmware
    local arm_target="$(__get_optee_video_arm_target "${arch}")"

    aml_log info "OPTEE-VIDEO-FIRMWARE" "Installing OPTEE video firmware from TDK ${platform_tdk_version} ${tdk_version} (${arm_target})"
    
    # Get video firmware source path
    local firmware_source="$(__get_video_firmware_source_path)"
    aml_log info "OPTEE-VIDEO-FIRMWARE" "Firmware source: ${firmware_source}"
    
    # Create directory structure
    mkdir -p "${install_dir}/usr/bin"
    mkdir -p "${install_dir}/usr/lib"
    mkdir -p "${install_dir}/lib/optee_armtz"
    mkdir -p "${install_dir}/usr/share/optee-video-firmware"
    
    # TA target is always "noarch" for video firmware
    local ta_target="noarch"
    
    aml_log info "OPTEE-VIDEO-FIRMWARE" "Installing TA files..."
    
    # Install TA files
    local ta_dir="${firmware_source}/${ta_target}/ta/${tdk_version}"
    if [[ -d "${ta_dir}" ]]; then
        find "${ta_dir}" -name "*.ta" -type f -exec install -m 0644 {} "${install_dir}/lib/optee_armtz/" \;
        local ta_count=$(find "${ta_dir}" -name "*.ta" -type f | wc -l)
        aml_log debug "OPTEE-VIDEO-FIRMWARE" "Installed ${ta_count} TA files from ${ta_dir}"
    else
        aml_log warn "OPTEE-VIDEO-FIRMWARE" "TA directory not found: ${ta_dir}"
    fi
    
    aml_log info "OPTEE-VIDEO-FIRMWARE" "Installing library..."
    
    # Install library file
    local lib_file="${firmware_source}/${platform_tdk_version}/${arm_target}/libtee_preload_fw.so"
    if [[ -f "${lib_file}" ]]; then
        install -m 0644 "${lib_file}" "${install_dir}/usr/lib/"
        aml_log debug "OPTEE-VIDEO-FIRMWARE" "Installed libtee_preload_fw.so"
    else
        aml_log warn "OPTEE-VIDEO-FIRMWARE" "Library file not found: ${lib_file}"
    fi
    
    aml_log info "OPTEE-VIDEO-FIRMWARE" "Installing binary..."
    
    # Install binary file
    local bin_file="${firmware_source}/${platform_tdk_version}/${arm_target}/tee_preload_fw"
    if [[ -f "${bin_file}" ]]; then
        install -m 0755 "${bin_file}" "${install_dir}/usr/bin/"
        aml_log debug "OPTEE-VIDEO-FIRMWARE" "Installed tee_preload_fw"
    else
        aml_log warn "OPTEE-VIDEO-FIRMWARE" "Binary file not found: ${bin_file}"
    fi
    
    aml_log info "OPTEE-VIDEO-FIRMWARE RT_LINUX=${RT_LINUX}" "Installing system service files..."
    
    # Install systemd service file (if available)
    local service_file="${SCRIPT_DIR}/optee-video-firmware/videoFirmwarePreload.service"
    if [[ -f "${service_file}" ]]; then
        mkdir -p "${install_dir}/usr/lib/systemd/system"
        install -m 0644 "${service_file}" "${install_dir}/usr/lib/systemd/system/"
        if [ "${RT_LINUX}" = "yes" ]; then
            sed -i "/^ExecStart=\/usr\/bin\/tee_preload_fw/a ExecStart=/bin/sh -c 'echo 1 > /sys/class/firmware_codec/reload'" \
                "${install_dir}/usr/lib/systemd/system/videoFirmwarePreload.service"
        fi
        aml_log debug "OPTEE-VIDEO-FIRMWARE" "Installed systemd service file"
    else
        aml_log info "OPTEE-VIDEO-FIRMWARE" "Systemd service file not found, skipping"
    fi
    
    display_alert "OPTEE-VIDEO-FIRMWARE" "Installation completed" "success"
    return 0
}

# Debian Package Creation
function __optee_video_firmware_create_deb() {
    local build_dir="${1}"
    local install_dir="${2}"
    local platform_tdk_version="${PLATFORM_TDK_VERSION}"
    local arch="${ARCH}"
    local pkg_arch="${arch}"
    
    # Package details
    local pkg_name="optee-video-firmware"
    local pkg_version="${platform_tdk_version#v}"  # Remove 'v' prefix
    local pkg_maintainer="Amlbian Builder <build@amlbian.com>"
    local pkg_description="OPTEE video firmware components (TA files, preload library)"
    local pkg_description_long="This package provides OPTEE (Open Portable Trusted Execution Environment) video firmware components including Trusted Applications (TA), preload library, and system service for video firmware loading."
    
    aml_log info "OPTEE-VIDEO-FIRMWARE" "Creating Debian package ${pkg_name}_${pkg_version}_${pkg_arch}.deb"
    
    # Create package directory structure
    local deb_dir="${build_dir}/deb/${pkg_name}-${pkg_version}"
    local debian_dir="${deb_dir}/DEBIAN"
    
    mkdir -p "${debian_dir}"
    
    # Copy installed files to package directory
    if [[ -d "${install_dir}" ]] && [[ "$(ls -A "${install_dir}")" ]]; then
        cp -r "${install_dir}"/* "${deb_dir}/" 2>/dev/null || true
        aml_log debug "OPTEE-VIDEO-FIRMWARE" "Copied installed files to package directory"
    else
        aml_log error "OPTEE-VIDEO-FIRMWARE" "No installed files found in ${install_dir}"
        return 1
    fi
    
    # Create control file with dependency on optee-userspace
    cat > "${debian_dir}/control" <<EOF
Package: ${pkg_name}
Version: ${pkg_version}
Architecture: ${pkg_arch}
Maintainer: ${pkg_maintainer}
Depends: optee-userspace, libbz2-1.0
Description: ${pkg_description}
 ${pkg_description_long}
Section: libs
Priority: optional
EOF
    
    # Create postinst script for systemd service
    cat > "${debian_dir}/postinst" << 'EOF'
#!/bin/sh
set -e

case "$1" in
    configure)
        # Update ldconfig cache
        if command -v ldconfig >/dev/null 2>&1; then
            ldconfig
        fi
        
        # Enable systemd service if systemd is available
        if command -v systemctl >/dev/null 2>&1 && [ -f /usr/lib/systemd/system/videoFirmwarePreload.service ]; then
            systemctl daemon-reload >/dev/null 2>&1 || true
            systemctl enable videoFirmwarePreload.service >/dev/null 2>&1 || true
        fi
        ;;
    *)
        ;;
esac

exit 0
EOF
    chmod 755 "${debian_dir}/postinst"
    
    # Create prerm script
    cat > "${debian_dir}/prerm" << 'EOF'
#!/bin/sh
set -e

case "$1" in
    remove|deconfigure)
        if command -v systemctl >/dev/null 2>&1 && [ -f /usr/lib/systemd/system/videoFirmwarePreload.service ]; then
            systemctl stop videoFirmwarePreload.service >/dev/null 2>&1 || true
            systemctl disable videoFirmwarePreload.service >/dev/null 2>&1 || true
        fi
        ;;
    *)
        ;;
esac

exit 0
EOF
    chmod 755 "${debian_dir}/prerm"
    
    # Create postrm script
    cat > "${debian_dir}/postrm" << 'EOF'
#!/bin/sh
set -e

case "$1" in
    purge|remove)
        # Update ldconfig
        if command -v ldconfig >/dev/null 2>&1; then
            ldconfig
        fi
        
        # Clean up systemd service
        if [ -f /usr/lib/systemd/system/videoFirmwarePreload.service ]; then
            rm -f /usr/lib/systemd/system/videoFirmwarePreload.service
            systemctl daemon-reload >/dev/null 2>&1 || true
        fi
        ;;
    *)
        ;;
esac

exit 0
EOF
    chmod 755 "${debian_dir}/postrm"
    
    # Build Debian package
    cd "${build_dir}/deb"
    dpkg-deb --build "${pkg_name}-${pkg_version}" >/dev/null 2>&1
    
    local deb_file="${pkg_name}-${pkg_version}.deb"
    if [[ -f "${deb_file}" ]]; then
        # Move to output directory
        local output_dir="${BUILD_DIR}/output"
        mkdir -p "${output_dir}"
        mv "${deb_file}" "${output_dir}/linux-${pkg_name}-${BOARD}-amlbian_${pkg_version}_${pkg_arch}.deb"
        display_alert "OPTEE-VIDEO-FIRMWARE" "Package created: ${output_dir}/linux-${pkg_name}-${BOARD}-amlbian_${pkg_version}_${pkg_arch}.deb" "success"
        return 0
    else
        aml_log error "OPTEE-VIDEO-FIRMWARE" "Failed to build Debian package"
        return 1
    fi
}

function amlbian_build_optee_video_firmware() {
    # Check if optee-video-firmware is enabled
    if ! is_unit_enabled "optee-video-firmware" && ! is_unit_enabled "optee"; then
        aml_log info "[SKIP] >> optee-video-firmware disabled (optee not enabled)"
        return
    fi
    
    aml_log info "AMLOGIC: Building OPTEE video firmware package ${PLATFORM_TDK_VERSION} ${ARCH} ${BOARD}"
    
    # Create build directory structure
    local build_root="${MODULE_BUILD_DIR}/optee-video-firmware-build-${ARCH}"
    local build_dir="${build_root}/build"
    local install_dir="${build_root}/install"

    rm -rf "${build_root}"

    # Create directories
    mkdir -p "${build_dir}" "${install_dir}"

    aml_log info "AMLOGIC: Build directory: ${build_dir}"
    aml_log info "AMLOGIC: Install directory: ${install_dir}"
    aml_log info "AMLOGIC: output_dir  ${BUILD_DIR}/output"
    
    # Install OPTEE video firmware components
    if ! __optee_video_firmware_install "${install_dir}"; then
        aml_log error "AMLOGIC: OPTEE video firmware installation failed"
        return 1
    fi
    
    # Create Debian package
    if ! __optee_video_firmware_create_deb "${build_dir}" "${install_dir}"; then
        aml_log error "AMLOGIC: Package creation failed"
        return 1
    fi
    
    display_alert "AMLOGIC: OPTEE video firmware package build completed successfully" "success"
    return 0
}

# ==============================================================================
# Section 5: Main
# ==============================================================================

aml_log info "AMLIbian OPTEE Video Firmware Build Script" "TDK Version: ${PLATFORM_TDK_VERSION}, Arch: ${ARCH}, Board: ${BOARD}"

amlbian_build_optee_video_firmware

aml_log info "AMLOGIC: OPTEE video firmware build completed" "${BUILD_DIR}/output"

# ==============================================================================
# End of build-optee-video-firmware.sh
# ==============================================================================