#!/usr/bin/env bash

echo "Repository name:      $DRONE_REPO_NAME"
echo "Repository owner:     $DRONE_REPO_OWNER"
echo
echo "Generator:            $GENERATOR"
echo "Documentation place:  $DOCUMENTATION_PLACE"
echo "Destination:          $DESTINATION"
echo "Remove mode:          $REMOVE_MODE"
echo
echo "Generating and deploying documentation for user $DRONE_REPO_OWNER and repository $DRONE_REPO_NAME"
echo

help() {
  cat <<EOF
usage: $0
environment variables:
  GENERATOR="[docusaurus|doxygen|mdbook|swagger]" -- generator to use.  - required
  DOCUMENTATION_PLACE="[dir]" -- location of the documentation sources root  - required
  DESTINATION="[dir]" -- path to where to put the documentation outputs in your repository's CodeDoc space  - optional, cannot be absolute !!
  REMOVE_MODE=[0|1|2] -- 0: disable, 1: for this type of documentation only, 2: all your documentations (/!\ use this command with caution!)  - optional
EOF
  exit 1
}


if [ ! "$GENERATOR" ] || [ ! "$DOCUMENTATION_PLACE" ] || echo "$DESTINATION" | grep -E -q "^[\/].*"; then
  echo "$0: bad usage" >&2
  help
fi


export GENERATION_PATH="/docs/$GENERATOR"
export RELATIVE_DOC_PATH=$(echo "$DRONE_REPO_OWNER/$DRONE_REPO_NAME/$DESTINATION/" | tr -s "/")



update_nginx_server() {
  local SERVER_TARGET="/usr/share/nginx/html/$RELATIVE_DOC_PATH"

  # launches rsync in archive, verbose and compression mode
  # creates target directory ($SERVER_TARGET) on server
  # then sends generated files into the server directory
  # rsync -avz -I \
  #   --rsync-path="mkdir -p \"$SERVER_TARGET\" && rsync" \
  #   -e "ssh -o StrictHostKeyChecking=no" \
  #   --delete "$GENERATION_PATH" root@nginx:"$SERVER_TARGET"
  echo
  echo "GENERATION_PATH: $GENERATION_PATH"
  echo "RELATIVE_DOC_PATH: $RELATIVE_DOC_PATH"
  echo "SERVER_TARGET: $SERVER_TARGET"
}


compute_remove() {

  [ $REMOVE_MODE -eq 0 ] || [ -z $REMOVE_MODE ] && return

  [ $REMOVE_MODE -eq 1 ] && (rm -Rf "$GENERATION_PATH"; mkdir -p "$GENERATION_PATH")
  [ $REMOVE_MODE -eq 2 ] && (rm -Rf "/docs"; mkdir -p "/docs")

  [ $REMOVE_MODE -lt 0 ] || [ $REMOVE_MODE -gt 2 ] && \
    (echo "unknown remove mode '$REMOVE_MODE', exiting..." >&2; exit 2)

  update_nginx_server
  echo "remove ok"
  exit 0
}


compute_doc_generation() {
  local GENERATOR_SCRIPT="/generators/$GENERATOR.sh"

  if [ ! -f "$GENERATOR_SCRIPT" ]; then
    echo "unknown generator type, please enter a valid generator ($(ls /generators | cut -d "." -f1 | tr "\n" " "))" >&2
    exit 1
  fi

  . "$GENERATOR_SCRIPT"
  generate "$DOCUMENTATION_PLACE"

  update_nginx_server
  echo "documentation generated and deployed at https://codefirst.iut.uca.fr/documentation/${RELATIVE_DOC_PATH}${GENERATOR}/"
  exit 0
}


compute_remove
compute_doc_generation