#!/bin/bash
# disable errors regarding androot.source as
# it is created and loaded at runtime
# shellcheck disable=SC1091
### TOBECHANGED
# disables unreachable code warnings
# shellcheck disable=SC2317
### TOBECHANGED_END

# check for root user
if [ ! "${UID}" == "0" ]; then
  echo ":: Error: Not running as root user"
  exit 1
fi

# determine $TMPDIR
if [ ! -d "${TMPDIR}" ]; then
  if [ -d "/tmp" ]; then
    export "TMPDIR=/tmp/androot"
  elif [ -d "/data/tmp" ]; then
    export "TMPDIR=/data/tmp/androot"
  else
    echo ":: Error: \$TMPDIR could not be determined"
    exit 1
  fi
fi
# ... and create it
mkdir -p "${TMPDIR}"

# write source file
cat << EOF > "${TMPDIR}/androot.source"
# Functions
## Indicate failure
function indicate_fail() {
  echo -e "\r\e[0m[\e[0;31mFAIL\e[0m]"
}
## Indicate success
function indicate_ok() {
  echo -e "\r\e[0m[\e[0;32m OK \e[0m]"
}
## Indicate running execution
function indicate_exec() {
  echo -ne "\e[0m[\e[0;34m....\e[0m] \${*}"
}
## Log diagnostic message to term
function log_diag() {
  if [ "\$DIAG" == "true" ]; then
    echo -e "\e[0m[\e[0;35mDIAG\e[0m] \${*}"
  fi
}
## Log informational message to term
function log_info() {
  echo -e "\r\e[0m[\e[0;32mINFO\e[0m] \${*}"
}
## Log warning message to term
function log_warn() {
  echo -e "\r\e[0m[\e[0;33mWARN\e[0m] \${*}"
}
## Log error message to term
function log_error() {
  echo -e "\r\e[0m[\e[0;31mERR!\e[0m] \${*}"
}
## Log message to log file
function log_write() {
  echo -e "\${*}" &>> "\${TMPDIR}/androot.log"
}
function log_execute() {
  log_write ">>>> \${*}"
  \${*} &>> "\${TMPDIR}/androot.log"
  EXITCODE=\${?}
  log_write "Exited with code \${EXITCODE}"
  return \${EXITCODE}
}
## Ask a question
function log_ask() {
  echo -ne "\e[0m[\e[0;36mASKQ\e[0m] \${*}"
  read -r ANSWER
}
## Ask for password
function log_askpasswd() {
  echo -ne "\e[0m[\e[0;36mASKP\e[0m] \${*}"
  read -rs ANSWER
  echo ""
}
## Ask for yes or no (agreement)
function log_askyn() {
  if [ -z "\${2}" ]; then
    log_error "log_askyn requires at least two arguments"
    exit 1
  fi
  export "ANSWER_FALLBACK=\${1}"
  shift
  echo -ne "\e[0m[\e[0;36mASKA\e[0m] \${*}"
  read -r ANSWER
  if [ "\${ANSWER,,}" == "y" ] || [ "\${ANSWER,,}" == "yes" ] || [ "\${ANSWER,,}" == "true" ] || [ "\${ANSWER}" == "" ]; then
    export "ANSWER=true"
  elif [ "\${ANSWER,,}" == "n" ] || [ "\${ANSWER,,}" == "no" ] || [ "\${ANSWER,,}" == "false" ]; then
    export "ANSWER=false"
  else
    export "ANSWER=\$ANSWER_FALLBACK"
  fi
}

# Language
## set language to C, useful for bug reports
export "LANG=C.UTF-8"
export "LANGUAGE=\${LANG}"
export "LC_ALL=\${LANG}"
export "LC_CTYPE=\${LANG}"
export "LC_NUMERIC=\${LANG}"
export "LC_TIME=\${LANG}"
export "LC_COLLATE=\${LANG}"
export "LC_MONETARY=\${LANG}"
export "LC_MESSAGES=\${LANG}"
export "LC_PAPER=\${LANG}"
export "LC_NAME=\${LANG}"
export "LC_ADDRESS=\${LANG}"
export "LC_TELEPHONE=\${LANG}"
export "LC_MEASUREMENT=\${LANG}"
export "LC_IDENTIFICATION=\${LANG}"

# Variables
## diagnostic mode
export "DIAG=${DIAG}"
## allow /dev/shm setting
export "ALLOW_SHM=${ALLOW_SHM}"
## temporary directory
export "TMPDIR=${TMPDIR}"
## androot installer branch
export "BRANCH=develop"
## unsafe commits list url
export "UNSAFE_COMMITS_LIST=https://fs.staropensource.de/vinf/unsafe/androot-\${BRANCH}"

# Download URLs
## rootfs archives
export "DOWNLOADSERVER_ROOTFS=https://fs.staropensource.de/rootfs/"
## qemu-static archives
export "DOWNLOADSERVER_QEMUSTATIC=https://fs.staropensource.de/qemu-static/"
## bootscripts repository
export "DOWNLOADSERVER_BOOTSCRIPTS=https://git.staropensource.de/StarOpenSource/androot.git"
## installer scripts url
export "DOWNLOADSERVER_RAW=https://git.staropensource.de/StarOpenSource/androot/raw/branch/\${BRANCH}/"

# Function variables
## get architecture
case "$(uname -m)" in
  # 64-bit architectures (supported)
  x86_64|amd64)
    export "ARCH=x86_64" ;;
  aarch64|aarch64_be|armv8b|armv8l)
    export "ARCH=arm64" ;;
  ppc64|ppc64le)
    export "ARCH=powerpc64" ;;
  mips64)
    export "ARCH=mips64" ;;
  
  # 32-bit architectures (unsupported)
  x86|i386|i686)
    export "ARCH=x86" ;;
  arm)
    export "ARCH=arm" ;;
  powerpc|ppc|ppcle)
    export "ARCH=powerpc" ;;
  mips)
    export "ARCH=mips" ;;
  *)
    export "ARCH=unknown" ;;
esac
## check if androot is running on android
if [ -d "/system" ] && [ -d "/data" ] && [ -d "/data/data" ] && [ ! -d "/home" ] && [ ! -d "/root" ]; then
  export "IS_ANDROID=true"
else
  export "IS_ANDROID=false"
fi
EOF

# display banner
echo -e "\e[0;33m ______  __  __  ____    ____    _____   _____   ______"
echo -e "\e[0;33m/\\  _  \\/\\ \\/\\ \\/\\  _\`\\ /\\  _\`\\ /\\  __\`\\/\\  __\`\\/\\__  _\\"
echo -e "\e[0;33m\\ \\ \\L\\ \\ \\ \`\\\\ \\ \\ \\/\\ \\ \\ \\L\\ \\ \\ \\/\\ \\ \\ \\/\\ \\/_/\\ \\/"
echo -e "\e[0;33m \\ \\  __ \\ \\ , \` \\ \\ \\ \\ \\ \\ ,  /\\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\"
echo -e "\e[0;33m  \\ \\ \\/\\ \\ \\ \\\`\\ \\ \\ \\_\\ \\ \\ \\\\ \\\\ \\ \\_\\ \\ \\ \\_\\ \\ \\ \\ \\"
echo -e "\e[0;33m   \\ \\_\\ \\_\\ \\_\\ \\_\\ \\____/\\ \\_\\ \\_\\ \\_____\\ \\_____\\ \\ \\_\\"
echo -e "\e[0;33m    \\/_/\\/_/\\/_/\\/_/\\/___/  \\/_/\\/ /\\/_____/\\/_____/  \\/_/"

# load source file
source "${TMPDIR}/androot.source"

# clear/create log file
## if in diagnostic mode, print newlines
## makes reading the log file much
## easier while using "make log"
if [ "${DIAG}" == "true" ]; then log_write "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"; fi
log_write "#### System information"
log_write "architecture ${ARCH}"
log_write "is_android ${IS_ANDROID}"
log_write "download_server_rootfs ${DOWNLOADSERVER_ROOTFS}"
log_write "download_server_qemustatic ${DOWNLOADSERVER_QEMUSTATIC}"
log_write "download_server_bootscripts ${DOWNLOADSERVER_BOOTSCRIPTS}"
log_write "args ${*}"
log_write "diag ${DIAG}"
log_write "#### System information"

# print diagnostic messages
log_diag "Diagnostic mode enabled"
log_diag "Arguments: ${*}"

# check for supported architecture
case "${ARCH}" in
  "unknown")
    log_error "androot failed to detect your architecture. If you believe this is a bug, create a issue at \"https://git.staropensource.de/StarOpenSource/androot\"."
    exit 1
    ;;
  "x86"|"arm"|"powerpc"|"mips")
    log_error "androot does not support legacy 32-bit systems, please use a 64-bit system instead."
    exit 1
    ;;
esac

# run a androot script and exit if failed
function run_script() {
  # $@ is used intentionally here, so ignore error
  # shellcheck disable=SC2068
  if ! $@; then
    exit 1
  fi
}

case "${1}" in
  "--local")
    # use scripts from cwd
    log_diag "Using local mode"
    run_script ./prepare.sh
    run_script ./rootfsinstall.sh --download
    run_script ./rootfsinstall.sh --decompress
    run_script ./mount.sh --mount
    run_script ./bootscriptdl.sh --download
    run_script ./bootscriptdl.sh --configure
    run_script ./bootscriptdl.sh --install-qemu
    exit 0
    run_script ./installsystem.sh --configure
    run_script ./installsystem.sh --update
    run_script ./patch.sh
    run_script ./mount.sh --unmount
    run_script ./finish.sh
    ;;
  "--download")
    # download scripts from the interwebz and execute them
    log_diag "Using download mode"
    indicate_exec "Downloading files"
    indicate_fail
    log_error "Unimplemented."
    exit 1
    ;;
  "--help"|"-h")
    log_diag "Displaying help"
    log_info "Available arguments:"
    log_info "--local [execute androot from cwd] --download [download androot scripts and execute] --help [display args and vars]"
    log_info "Available environment variables:"
    log_info "DIAG [displays diagnostic messages, true/false] ALLOW_SHM [allows using /dev/shm as a location, true/false]"
    ;;
  *)
    log_diag "i thought putting a little \"advertisement parody\" in here would be funny"
    log_error "StarOpenSource is happy to present the latest and greatest version of --help! --help now uses cutting edge technology to display the most useful help to you, and that for only zero dollars!"
    ;;
esac