#!/usr/bin/env nuxsh

nux.use nux/fs
@prefix fs nux.fs.
@prefix check nux.check.

MARK_DIR_NAME="${MARK_DIR_NAME:-.by}"
MARK_PREFIX=""


## Manages symlinks in closest mark (**.by**) directory, provides functionality to batch create
## them with relative paths.
##
## #Available tasks:
##   tag:: <task> <task arguments...>
##     Performs specified task in tag namespace (marks prefixed with **tag/**)
@command tag task {
  MARK_PREFIX="tag/"
  nuxr.run "$task" "$@"
}

##   this:: <mark> [marks...]
##     Marks **current folder** with specific markers.
##     This creates symlinks in **mark** folder pointing to **current folder**.
@command this mark {
  nux.log debug "Args $#"
  item=$(pwd)
  mark_root=$(mark.dir "$item")
  mark.mark "$mark_root" "$item" "$MARK_PREFIX$mark"
  while [ "$#" -gt 0 ]; do
    mark="$1"; shift;
    mark.mark "$mark_root" "$item" "$MARK_PREFIX$mark"
  done
}

##   file:: <file> <marks...>
##     Marks **files** with specific **mark**.
##     This creates symlinks for files in **mark** folder.
@command file file {
  mark_root=$(mark.dir "$pwd")
  while [ "$#" -gt 0 ]; do
    mark="$1"; shift;
    mark.mark "$mark_root" "$file" "$MARK_PREFIX$mark"
  done
}

##   multiple:: <mark> <files...>
##     Marks **files** with specific **mark**.
##     This creates symlinks for files in **mark** folder.
@command multiple mark {
  pwd=$(pwd)
  mark_root=$(mark.dir "$pwd")
  while [ "$#" -gt 0 ]; do
    item="$1"; shift;
    mark.mark "$mark_root" "$pwd/$item" "$MARK_PREFIX$mark"
  done
}

##   display:: [mark]
##     Displays path to current mark folder and displays available marks.
##     If **mark** is provided list nested marks.
@command display mark {
  mark_root=$(mark.dir $pwd)
  prefix="$MARK_PREFIX"
  if [ -n "$mark" ]; then
    prefix="$MARK_PREFIX$mark/";
  fi
  echo $mark_root:
  (
    cd "$mark_root";
    for mark in  "$prefix"* ; do
      echo ${mark#$MARK_PREFIX};
    done;
    )
}
##   mark-to-target:: mark target [suffix]
##     Moves non-symlinks to *target* and creates symlinks in mark folder
##     This also applies to submarks
@command mark-to-target mark target {
  suffix="$1";
  nux.log info "Suffix is $suffix"
  mark=$(mark.dir $pwd)/$mark
  nux.log debug $(mark.dir $pwd) $mark;
  find "$mark" -type f | while read file; do
    if ! nux.check.file.symlink "$file"; then
      name=$(nux.fs.name "$file")
      file_mark=$(nux.fs.dirname "$file")
      fs:info "$file" Moving to $target/$name
      fs:move "$target" "$file"
      fs:info "$target/$name" Creating symlink in $file_mark
      fs:symlink "$target/$name" "$file_mark" "$name"
    fi
  done
}

##   visual:: [image+]
##     Display images using feh and allows adding marks using 1-9 key.
##     The list of marks is speficied by environment variable *MARK_TAGS*
##
@command visual {
  nux.require feh
  marks=${MARK_TAGS:-person woman man selfie}
  mark_root="$(nux.fs.path.relative.pwd $(mark.dir "$pwd"))"
  #mark_root=$(mark.dir $pwd)
  nux.log debug "Mark Root:" $mark_root
  actions="";
  for mark in $marks; do
    ((i++))
    mark=$MARK_PREFIX$mark
    if [ $i -gt 9 ]; then
      break;
    fi
    action="--action$i '[$mark] mkdir -p $mark_root/$mark; ln -svft $mark_root/$mark \$(realpath -Lms --relative-to=$mark_root/$mark %F)'";
    actions="$actions $action";

  done;
  nux.log debug Feh actions "$actions"
  nux.eval feh \
    --zoom max \
    --scale-down \
    -g 900x1000 \
    -G \
    "--action '[keep]echo %F: Next file.'" \
    "$actions" \
    "--info 'echo %n: %wx%h'" \
    --draw-tinted  "$@"
}


@namespace mark. {
  function :dir item {
    if  [ -n "$MARK_DIR" ]; then
      echo $MARK_DIR;
    else
      fs:closest "$MARK_DIR_NAME" "$item"
    fi
  }

  function :mark root item mark {
    name=""
    if [ -e "$root/.path-names" ]; then
      rel_path=$(nux.fs.path.relative "$root/.." "$item");
      name=${rel_path//\//-}
      fs:info "$item" Creating symlink: $(nux.fs.path.display "$root/$mark/$name")
    else
      fs:info "$item" Creating symlink in $(nux.fs.path.display "$root/$mark")
    fi
    fs:symlink "$item" "$root/$mark" "$name"
  }

}