#!/bin/zsh

###
### Set global variables
###

: ${XDG_CONFIG_HOME:=$HOME/.config}
export XDG_CONFIG_HOME


###
### Zsh Configuration
###

# Customize spelling correction prompt.
SPROMPT='zsh: correct %F{red}%R%f to %F{green}%r%f [nyae]? '

# Characters considered part of a word by the line editor
WORDCHARS="*?_-.~$"

# Set the "main" keyboard so `bindkey` without `-M` will change the expected map
bindkey -A viins main


###
### Path
###

setopt nullglob
path=(
  $HOME/bin
  $HOME/dev_local/bin
  $HOME/.local/bin
  $HOME/.local/*/bin
  $HOME/go/bin
  /opt/*/bin
  $path)
setopt nonullglob

fpath=($fpath /usr/share/zsh/site-functions)

# Remove duplicates
typeset -U path fpath


###
### Modules
###

### ASDF & direnv
#
if [[ -e "${XDG_CONFIG_HOME}/asdf-direnv/zshrc" ]]; then
  source "${XDG_CONFIG_HOME}/asdf-direnv/zshrc"
else
  echo "asdf: direnv plugin not set!"
  # asdf plugin add direnv
  # asdf install direnv latest
  # asdf direnv setup --version latest
  # asdf global direnv latest
fi

### b4b4r07/enhancd
#
# See https://github.com/b4b4r07/enhancd
#
# Changes from default behaviour:
# - Use single-dot to show upper tree (default is sub-dir);
#   (use Alt-C (provided by fzf) to go into sub-dir).
ENHANCD_DIR=$HOME/.zim
ENHANCD_ARG_DOUBLE_DOT='.'
ENHANCD_ENABLE_SINGLE_DOT=false

### fzf
#
# Scripts sourced by zvm_after_init()
#
# - https://github.com/junegunn/fzf#key-bindings-for-command-line
# - https://github.com/junegunn/fzf#fuzzy-completion-for-bash-and-zsh

#
# Adapted from https://github.com/zimfw/fzf
#
export FZF_DEFAULT_OPTS='--height 40% --layout=reverse'

if (( ${+commands[fd]} )); then
  export FZF_DEFAULT_COMMAND='command fd --color=always --hidden --no-ignore-vcs --exclude=.git --type=file --strip-cwd-prefix'
  export FZF_ALT_C_COMMAND='command fd --color=always --hidden --no-ignore-vcs --exclude=.git --type=directory --strip-cwd-prefix'

  # Trigger for completion: "**"
  # Commands using _dir: FZF_COMPLETION_DIR_COMMANDS
  _fzf_compgen_path() {
    command fd --color=always --hidden --no-ignore-vcs --exclude=.git --type=file . "${1}"
  }
  _fzf_compgen_dir() {
    command fd --color=always --hidden --no-ignore-vcs --exclude=.git --type=directory . "${1}"
  }
  export FZF_DEFAULT_OPTS="--ansi ${FZF_DEFAULT_OPTS}"
elif (( ${+commands[rg]} )); then
  export FZF_DEFAULT_COMMAND="command rg -uu -g '!.git' --files"
  _fzf_compgen_path() {
    command rg -uu -g '!.git' --files "${1}"
  }
fi
if (( ${+commands[bat]} )); then
  export FZF_CTRL_T_OPTS="\
  --preview='command bat --color=always --line-range :100 --style=plain {}'\
  --preview-window=border-left\
  ${FZF_CTRL_T_OPTS}"
fi

if (( ${+FZF_DEFAULT_COMMAND} )) export FZF_CTRL_T_COMMAND=${FZF_DEFAULT_COMMAND}

# fzf: Debian Specific
#
FZF_CTRL_R_OPTS="--no-sort --exact"

# fzf: Alternate history (Ctrl-Win-R)
#
if [[ -f $ALT_HISTORY_FILE ]]; then
  fzf-alt-history-widget() {
    local selected num
    setopt localoptions noglobsubst noposixbuiltins pipefail no_aliases 2> /dev/null
    selected=( $(cat ${ALT_HISTORY_FILE} |
      FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} $FZF_DEFAULT_OPTS --tiebreak=index --bind=ctrl-r:toggle-sort,ctrl-z:ignore $FZF_CTRL_R_OPTS --query=${(qqq)LBUFFER} +m" $(__fzfcmd)) )
    local ret=$?
    BUFFER=$selected
    zle reset-prompt
    return $ret
  }
  zle -N fzf-alt-history-widget
  bindkey -M vicmd '^[[114;13u' fzf-alt-history-widget
  bindkey -M viins '^[[114;13u' fzf-alt-history-widget
fi

### ZVM — Zsh VI mode
#
# https://github.com/jeffreytse/zsh-vi-mode

function zvm_config() {
  ZVM_LINE_INIT_MODE=$ZVM_MODE_INSERT
}

# bindkey for other modules
function zvm_after_init {
  # fzf
  source /usr/share/doc/fzf/examples/key-bindings.zsh
  source /usr/share/doc/fzf/examples/completion.zsh

  # Automatic expansion of global aliases
  bindkey " " globalias
  bindkey "^ " magic-space           # control-space to bypass completion
  bindkey -M isearch " " magic-space # normal space during searches
}


###
### Zim Framework
###

# Use degit instead of git as the default tool to install and update modules.
zstyle ':zim:zmodule' use 'degit'


ZIM_HOME=${ZDOTDIR:-${HOME}}/.zim
if [[ ! -e ${ZIM_HOME}/zimfw.zsh ]]; then
  # Download zimfw script if missing.
  if (( ${+commands[curl]} )); then
    curl -fsSL --create-dirs -o ${ZIM_HOME}/zimfw.zsh https://github.com/zimfw/zimfw/releases/latest/download/zimfw.zsh
  else
    mkdir -p ${ZIM_HOME} && wget -nv -O ${ZIM_HOME}/zimfw.zsh https://github.com/zimfw/zimfw/releases/latest/download/zimfw.zsh
  fi
fi
if [[ ! ${ZIM_HOME}/init.zsh -nt ${ZDOTDIR:-${HOME}}/.zimrc ]]; then
  # Install missing modules, and update ${ZIM_HOME}/init.zsh if missing or outdated.
  source ${ZIM_HOME}/zimfw.zsh init -q
fi
source ${ZIM_HOME}/init.zsh


###
### Aliases & Small Functions
###
#
# https://www.thorsten-hans.com/5-types-of-zsh-aliases
#
# https://unix.stackexchange.com/questions/250314/whats-the-intended-use-case-for-complete-aliases-in-zsh
# See also the Completion section below

alias cp='cp --interactive'
alias mv='mv --interactive'
alias rm='rm -I'

mkcd() { command mkdir -p "$@" && builtin cd "$@" }

autoload -U zmv
alias mmv='noglob zmv -W'

# https://github.com/lsd-rs/lsd
# ~/.config/lsd/config.yaml
alias ls='lsd'

alias  l='lsd --total-size -l'
alias ll='lsd --total-size -lA'

alias  lt='lsd -ltr'
alias llt='lsd -ltrA'

alias  lx='lsd -l --blocks=permission,user,group,context,size,date,name'
alias llx='lx -A'

alias t='lsd --long --tree --depth=2 --no-symlink'

# Dev
#
alias make='colormake-short'
compdef colormake=make
compdef colormake-short=make

# Git
#
alias dotfiles='/usr/bin/git --git-dir=$HOME/.dotfiles --work-tree=$HOME'

lg()
{
  export LAZYGIT_NEW_DIR_FILE="${XDG_CONFIG_HOME}/lazygit/cd-on-quit_$$"
  lazygit "$@"
  if [ -f $LAZYGIT_NEW_DIR_FILE ]; then
    cd "$(cat $LAZYGIT_NEW_DIR_FILE)"
    rm -f $LAZYGIT_NEW_DIR_FILE > /dev/null
  fi
}

# Kitty
#
hg () { kitten hyperlinked_grep "$@" }
compdef hg=rg

# Neovim — nvim
#
# To choose an existing instance for nvr, use:
#   `export NVIM=$(nvr --serverlist | fzf --exit-0 --select-1) && echo $NVIM`


# nnn - n³
#

local nnn_plug=(
  'b:-!bat --paging=always "$nnn"*'
  'd:fzcd'
  'z:fzopen'
  'm:mimelist'
  'o:-!mimeopen "$nnn"*'
  'O:-!mimeopen --ask "$nnn"*'
  'U:umounttree'
  ';:-!clear*'

  # TODO Dump trash
)

n()
{
  if [ ${NNNLVL:-0} -gt 0 ]; then
    echo 'nnn is already running'
    return
  fi

  local -x LESS=${LESS/F}
  local -x PATH=$HOME/.config/nnn/plugins:$PATH

  # See https://github.com/jarun/nnn/wiki/Usage#configuration
  local -x GUI=1  # plugins: nuke, xdgdefault
  local -x NNN_ARCHIVE='\.(7z|bz2|cbz|cbr|gz|tar|tbz|tgz|xz|zip|zst)$'
  local -x NNN_BMS="d:~/Downloads;q:~/QubesIncoming"
  local -x NNN_OPENER="${XDG_CONFIG_HOME}/nnn/plugins/nuke"
  local -x NNN_OPTS='ABeGo'
  local -x NNN_ORDER="t:$HOME/Downloads"
  local -x NNN_PLUG=${(j:;:)nnn_plug}
  local -x NNN_TMPFILE="${XDG_CONFIG_HOME}/nnn/cd-on-quit"

  if (( ${+commands[fuse-archive]} )); then
    local -x NNN_ARCHMNT='fuse-archive'
  fi
  if (( ${+commands[trash-put]} )); then
    local -x NNN_TRASH=1
  elif (( ${+commands[gio]} )); then
    local -x NNN_TRASH=2
  fi

  command nnn "$@"

  if [ -f $NNN_TMPFILE ]; then
    # Tmp file contains a `cd` directive that will
    # behave like a `pushd`, ignoring duplicates.
    setopt autopushd pushdignoredups
    . $NNN_TMPFILE
    rm -f $NNN_TMPFILE > /dev/null
    dirs -v
  fi
}
compdef n=nnn

nnn-file-widget() {
  # Extract "shell word" at cursor position (respecting quotes)
  local _cursor=$CURSOR
  zle .select-a-shell-word -N

  # Helper
  nnn-pick()
  {
    IFS=$'\n'
    local items=( $(command nnn -p- $1 < "$TTY") )
    if (( #items > 0 )); then
      items=( ${(q-)items} )
      print -n "${(j: :)items} "
    fi
  }

  # Adapt behaviour to buffer content
  if (($CURSOR < _cursor)); then
    # Nothing at cursor, restore state before calling nnn
    CURSOR=${_cursor}
    REGION_ACTIVE=0
    zle -U "$(nnn-pick)"
  else
    # Provide content under cursor to nnn
    zle .kill-region
    local result="$(nnn-pick ${CUTBUFFER## })"
    if (( #result == 0 )); then
      # Nothing selected, restore content
      zle .yank
    else
      # Replace content with what nnn returned
      zle -U " $result"
    fi
  fi

  # TODO single-op undo
  # TODO Handle vicmd properly
  zle .redisplay
}
zle -N nnn-file-widget
bindkey -M vicmd '\en' nnn-file-widget
bindkey -M viins '\en' nnn-file-widget


# Whiptail helper
#
# see https://stackoverflow.com/questions/1970180/whiptail-how-to-redirect-output-to-environment-variable

whiptail_checklist() {
  autoload zmathfunc; zmathfunc  # min, max, sum
  eval $(resize)  # COLUMNS, LINES

  local res title="$1" text="$2"
  (( width=max(30, $#text) ))
  shift 2

  # Make tags compatible with whiptail
  local -a tags
  for tag; do
    tags+=($tag $tag 0)
    (( width=max(width, $#tag) ))
  done

  # Compute "best" width & height
  (( list_height=min(20, ${#*}, LINES * .5) ))
  (( height=min(list_height+8, LINES) ))
  (( width=min(width + 9, COLUMNS * .75) ))

  tag=$(whiptail --title $title \
          --checklist $text $height $width $list_height $tags \
          --separate-output --notags 3>&1 1>&2 2>&3 3>&-)
  res=$?

  # Use res=${(f)"$(whiptail_checklist...)"} to ignore spaces
  echo $tag
  return $res
}

whiptail_menu() {
  autoload zmathfunc; zmathfunc  # min, max, sum
  eval $(resize)  # COLUMNS, LINES

  local res title="$1" text="$2"
  (( width=max(30, $#text) ))
  shift 2

  # Make tags compatible with whiptail
  local -a tags
  for tag; do
    tags+=($tag $tag)
    (( width=max(width, $#tag) ))
  done

  # Compute "best" width & height
  (( menu_height=min(20, ${#*}, LINES * .5) ))
  (( height=min(menu_height+8, LINES) ))
  (( width=min(width + 5, COLUMNS * .75) ))

  tag=$(whiptail --title $title \
          --menu $text $height $width $menu_height $tags \
          --notags 3>&1 1>&2 2>&3 3>&-)
  res=$?

  echo $tag
  return $res
}


###
### Aliases -- Global & automatic expansion
###

alias -g D='$(date +%Y-%m-%d_%H-%M-%S)'
alias -g E='2> /dev/null'
alias -g G='|& grep -i'
alias -g H='| head'
alias -g HL='--help |& less -r'
alias -g L='| less'
alias -g N='&> /dev/null'
alias -g P='| peco'
alias -g S='| sort'
alias -g T='| tail'

# Expand aliases inline - see http://blog.patshead.com/2012/11/automatically-expaning-zsh-global-aliases---simplified.html
globalias() {
   if [[ $LBUFFER =~ ' [A-Z0-9]+$' ]]; then
     zle _expand_alias
     # If you want the content of the alias to be also expanded:
     # zle expand-word
     # (otherwise, <BS><Tab> do the job...)
   fi
   zle self-insert
}
zle -N globalias


###
### Colors
###

if [[ -r /etc/grc.zsh ]]; then
  # ! Incompatible with P10K Transient
  source /etc/grc.zsh

  # I want the default behaviour for:
  unset -f journalctl
  unset -f ls
fi


###
### Exports
###

export BROWSER=firefox
export EDITOR=vi
export LESS=-iFRS
export SYSTEMD_LESS='iFRSXMK'
export VISUAL=bat

# KeePassXC SSH Agent
[[ -v SSH_AUTH_SOCK ]] || export SSH_AUTH_SOCK=$(echo /tmp/ssh-*/agent.*(U))


###
### History
###

setopt hist_ignore_all_dups
setopt hist_ignore_space
setopt hist_no_functions
setopt hist_reduce_blanks
setopt hist_save_no_dups
setopt hist_verify
setopt inc_append_history

HISTFILE=${ZDOTDIR:-${HOME}}/.zhistory
HISTSIZE=4000
SAVEHIST=3000
HISTORY_IGNORE="(?|??|???|cd [a-zA-Z]*|* --help|#*|builtin *|run-help *)"


###
### Key Binding
###

# `bindkey | grep -v self-insert` to print existing bindings
# `showkey -a` to print keys

# Undo (useful to cancel completion -- borrowed from emacs keymap)
bindkey -M vicmd "^_" undo
bindkey -M viins "^_" undo


###
### Zsh Options
###

## Changing Directories
setopt no_auto_cd

## Expansion and Globbing
setopt equals

## Input/Output
setopt no_clobber
setopt correct
setopt interactive_comments
setopt no_print_exit_value

## Job control
setopt auto_continue
setopt no_bg_nice
setopt check_jobs
setopt no_hup


# Remove path duplicates
typeset -U path fpath


###
### Completion Late Definitions
###

compdef locate=glocate

# Hide "parameters" (i.e. environment variables)  when looking for a "command"
zstyle ':completion:*:-command-:*' tag-order '!parameters'