#! /bin/bash

function main() {
   set -e
   set -u
   local from_addr="$1"
   local to_addr="$2"
   log migrating $from_addr to $to_addr
   for list in $(get_lists "$from_addr"); do
      migrate_tasks "$from_addr" "$to_addr" "$list"
   done
}

function log() {
   echo "> $@" >&2
}

function CURL() {
   curl "$@" 2> /dev/null
}

function get_lists() {
   local addr="$1"
   CURL "$addr/ajax.php?loadLists" \
      | jq -r .list[].id 
}

function migrate_tasks() {
   local from_addr="$1"
   local to_addr="$2"
   local from_list="$3"
   local to_list=$(lookup_list "$from_addr" "$from_list" "$to_addr")
   local has_tasks="$(list_tasks "$to_addr" "$to_list" | base64 --decode | jq .title)"
   for task in $(list_tasks "$from_addr" "$from_list"); do
      add_task "$to_addr" "$to_list" "$task" "$has_tasks"
   done
}

function lookup_list() {
   local from_addr="$1"
   local from_list="$2"
   local to_addr="$3"
   local name=$(CURL "$from_addr/ajax.php?loadLists" \
      | jq -c .list[] \
      | grep "\"$from_list\"" \
      | jq -r .name)
   if ! CURL "$to_addr/ajax.php?loadLists" \
      | jq -c .list[] \
      | grep "\"$name\"" \
      | jq -r .id \
      | grep .; then
      CURL \
         -X POST \
         "$to_addr/ajax.php?addList" \
         --data-urlencode "name=$name" \
         | jq -r .list[0].id 
   fi
}

function list_tasks() {
   local addr="$1"
   local list="$2"
   CURL "$addr/ajax.php?loadTasks&list=$list&compl=1" \
      | jq -c .list[] | while read -r task; do
      printf "%s }\n" "${task%\}}" | base64 | tr -d ' ' | tr -d '\n'
      echo ""
   done
}

function add_task() {
   local addr="$1"
   local list="$2"
   local task="$(echo -n "$3" | base64 --decode | jq "del(.id, .listId)")"
   local has_tasks="$4"
   local title="$(echo "$task" | jq -r .title)"
   local tags="$(echo "$task" | jq -r .tags)"
   if echo "$has_tasks" | grep "\"$title\"" > /dev/null; then
      return
   fi
   log migrating title=$title
   local id="$(CURL \
      -X POST \
      "$addr/ajax.php?newTask" \
      --data-urlencode "list=$list" \
      --data-urlencode "title=$title /$tags/" \
      2> /dev/null \
      | jq -r .list[0].id
   )"
   if echo "$task" | jq -r .compl | grep 1 > /dev/null; then
      CURL \
         -X POST \
         "$addr/ajax.php?completeTask=$id" \
         -d "id=$id" \
         -d "compl=1" \
         > /dev/null
   fi
   if echo "$task" | jq -r .noteText | grep . > /dev/null; then
      local text="$(printf "$task" | jq -r .noteText)"
      CURL \
         -X POST \
         "$addr/ajax.php?editNote=$id" \
         -d "id=$id" \
         --data-urlencode "note=$text" \
         > /dev/null
   fi
}

if [ "$0" == "$BASH_SOURCE" ]; then
   time main "$@"
fi