### EXPORT ###
export TERM="xterm-256color"                      # getting proper colors
export HISTCONTROL=ignoredups:erasedups           # no duplicate entries

### "bat" as manpager
export MANPAGER="sh -c 'sed -u -e \"s/\\x1B\[[0-9;]*m//g; s/.\\x08//g\" | bat -p -lman'"

# use bash-completion, if available
[[ $PS1 && -f /usr/share/bash-completion/bash_completion ]] && \
    . /usr/share/bash-completion/bash_completion

# if not running interactively, don't do anything
[[ $- != *i* ]] && return

### SET VI MODE ###
# Comment this line out to enable default emacs-like bindings
set -o vi
bind -m vi-command 'Control-l: clear-screen'
bind -m vi-insert 'Control-l: clear-screen'

### CHANGE TITLE OF TERMINALS ###
case ${TERM} in
    xterm*|rxvt*|Eterm*|aterm|kterm|gnome*|alacritty|st|konsole*)
        PROMPT_COMMAND='echo -ne "\033]0;${USER}@${HOSTNAME%%.*}:${PWD/#$HOME/\~}\007"'
        ;;
    screen*)
        PROMPT_COMMAND='echo -ne "\033_${USER}@${HOSTNAME%%.*}:${PWD/#$HOME/\~}\033\\"'
    ;;
esac

### SHOPT ###
shopt -s autocd # change to named directory
shopt -s cdspell # autocorrects cd misspellings
shopt -s cmdhist # save multi-line commands in history as single line
shopt -s dotglob
shopt -s histappend # do not overwrite history
shopt -s expand_aliases # expand aliases
shopt -s checkwinsize # checks term size when bash regains control

# ignore upper and lowercase when TAB completion
bind "set completion-ignore-case on"

# sudo not required for some system commands
for command in cryptsetup mount umount poweroff reboot ; do
alias $command="sudo $command"
done; unset command

### ARCHIVE EXTRACTION ###
# usage: ex <file>
function ex() {
    if [ -f "$1" ] ; then
        case $1 in
            *.tar.bz2)   tar xjf "$1"   ;;
            *.tar.gz)    tar xzf "$1"   ;;
            *.bz2)       bunzip2 "$1"   ;;
            *.rar)       unrar x "$1"   ;;
            *.gz)        gunzip "$1"    ;;
            *.tar)       tar xf "$1"    ;;
            *.tbz2)      tar xjf "$1"   ;;
            *.tgz)       tar xzf "$1"   ;;
            *.zip)       unzip "$1"     ;;
            *.Z)         uncompress "$1";;
            *.7z)        7zz x "$1"     ;;
            *.deb)       ar x "$1"      ;;
            *.tar.xz)    tar xf "$1"    ;;
            *.tar.zst)   unzstd "$1"    ;;
            *)           echo "'$1' cannot be extracted via ex()" ;;
        esac
    else
        echo "'$1' is not a valid file"
    fi
}

### ALIASES ###
# navigation
function up () {
    local d=""
    local limit="$1"

    # Default to limit of 1
    if [ -z "$limit" ] || [ "$limit" -le 0 ]; then
        limit=1
    fi

    for ((i=1;i<=limit;i++)); do
        d="../$d"
    done

    # perform cd. Show error if cd fails
    if ! cd "$d"; then
        echo "Couldn't go up $limit dirs.";
    fi
}

# unlock ssh keys
function unlock() {
    ssh-add "$HOME/.ssh/$1"
}

# cd
alias \
    ..="cd .." \
    .2="cd ../.." \
    .3="cd ../../.." \
    .4="cd ../../../.." \
    .5="cd ../../../../.."

# bat as cat
[ -x "$(command -v bat)" ] && alias cat="bat"

# fastfetch as neofetch
[ -x "$(command -v fastfetch)" ] && alias neofetch="fastfetch"

# use lunarvim or neovim for vim if present.
if [ -x "$(command -v $HOME/.local/bin/lvim)" ]; then
    alias vim="$HOME/.local/bin/lvim"
elif [ -x "$(command -v nvim)" ]; then
    alias vim="nvim"
fi

# Changing "ls" to "eza"
[ -x "$(command -v eza)" ] && alias \
    ls="eza --icons -al --color=always --group-directories-first" \
    la="eza --icons -a --color=always --group-directories-first" \
    ll="eza --icons -l --color=always --group-directories-first" \
    lt="eza --icons -aT --color=always --group-directories-first" \
    l.='eza --icons -a | grep -E "^\."'

# function to detect os and assign aliases to package managers
alias \
    pkg-update="paru -Syyu" \
    pkg-install="paru -S" \
    pkg-remove="paru -Rcns" \
    pkg-remove-sec="paru -R" \
    pkg-autoremove="paru -Scc && paru -Rns (pacman -Qtdq)" \
    pkg-search="paru -Ss"

# colorize grep output (good for log files)
alias \
    grep="grep --color=auto" \
    egrep="egrep --color=auto" \
    fgrep="fgrep --color=auto"

# git
alias \
    git-adu="git add -u" \
    git-adl="git add ." \
    git-brn="git branch" \
    git-chk="git checkout" \
    git-cln="git clone" \
    git-cmt="git commit -m" \
    git-fth="git fetch" \
    git-pll="git pull origin" \
    git-psh="git push origin" \
    git-sts="git status" \
    git-tag="git tag" \
    git-ntg="git tag -a"

# adding flags
alias \
    df="df -h" \
    free="free -m"

# multimedia scripts
alias \
    fli="flix-cli" \
    ani="ani-cli" \
    aniq="ani-cli -q"

# audio
alias \
    mx="pulsemixer" \
    mk="cmus" \
    ms="cmus" \
    music="cmus"

# power management
alias \
    po="systemctl poweroff" \
    sp="systemctl suspend" \
    rb="systemctl reboot"

# file management
alias \
    fm="yazi" \
    flm="yazi" \
    rm="rm -vI" \
    mv="mv -iv" \
    cp="cp -iv" \
    mkd="mkdir -pv"

# ps
alias \
    psa="ps auxf" \
    psgrep="ps aux | grep -v grep | grep -i -e VSZ -e" \
    psmem="ps auxf | sort -nr -k 4" \
    pscpu="ps auxf | sort -nr -k 3"

# youtube
alias \
    yta-aac="yt-dlp --extract-audio --audio-format aac" \
    yta-best="yt-dlp --extract-audio --audio-format best" \
    yta-flac="yt-dlp --extract-audio --audio-format flac" \
    yta-m4a="yt-dlp --extract-audio --audio-format m4a" \
    yta-mp3="yt-dlp --extract-audio --audio-format mp3" \
    yta-opus="yt-dlp --extract-audio --audio-format opus" \
    yta-vorbis="yt-dlp --extract-audio --audio-format vorbis" \
    yta-wav="yt-dlp --extract-audio --audio-format wav" \
    ytv-best="yt-dlp -f bestvideo+bestaudio" \
    yt="ytfzf -ftsl" \
    ytm="ytfzf -mtsl"

# network and bluetooth
alias \
    netstats="nmcli dev" \
    wfi="nmtui-connect" \
    wfi-scan="nmcli dev wifi rescan && nmcli dev wifi list" \
    wfi-edit="nmtui-edit" \
    wfi-on="nmcli radio wifi on" \
    wfi-off="nmcli radio wifi off" \
    blt="bluetoothctl"

# Automatically add completion for all aliases to commands having completion functions
# this currently slows startup a bit, but it isn't terrible
function alias_completion {
    local namespace="alias_completion"

    # parse function based completion definitions, where capture group 2 => function and 3 => trigger
    local compl_regex='complete( +[^ ]+)* -F ([^ ]+) ("[^"]+"|[^ ]+)'
    # parse alias definitions, where capture group 1 => trigger, 2 => command, 3 => command arguments
    local alias_regex="alias ([^=]+)='(\"[^\"]+\"|[^ ]+)(( +[^ ]+)*)'"

    # create array of function completion triggers, keeping multi-word triggers together
    eval "local completions=($(complete -p | sed -Ene "/$compl_regex/s//'\3'/p"))"
    (( ${#completions[@]} == 0 )) && return 0

    # create temporary file for wrapper functions and completions
    command rm -f "/tmp/${namespace}-*.tmp" &> /dev/null # preliminary cleanup
    local tmp_file; tmp_file="$(mktemp "/tmp/${namespace}-${RANDOM}XXX.tmp")" || return 1

    local completion_loader; completion_loader="$(complete -p -D 2>/dev/null | sed -Ene 's/.* -F ([^ ]*).*/\1/p')"

    # read in "<alias> '<aliased command>' '<command args>'" lines from defined aliases
    local line; while read line; do
        eval "local alias_tokens; alias_tokens=($line)" 2>/dev/null || continue # some alias arg patterns cause an eval parse error
        local alias_name="${alias_tokens[0]}" alias_cmd="${alias_tokens[1]}" alias_args="${alias_tokens[2]# }"

        # skip aliases to pipes, boolean control structures and other command lists
        # (leveraging that eval errs out if $alias_args contains unquoted shell metacharacters)
        eval "local alias_arg_words; alias_arg_words=($alias_args)" 2>/dev/null || continue
        # avoid expanding wildcards
        read -a alias_arg_words <<< "$alias_args"

        # skip alias if there is no completion function triggered by the aliased command
        if [[ ! " ${completions[*]} " =~ " $alias_cmd " ]]; then
            if [[ -n "$completion_loader" ]]; then
                # force loading of completions for the aliased command
                eval "$completion_loader $alias_cmd"
                # 124 means completion loader was successful
                [[ $? -eq 124 ]] || continue
                completions+=($alias_cmd)
            else
                continue
            fi
        fi
        local new_completion="$(complete -p "$alias_cmd")"

        # create a wrapper inserting the alias arguments if any
        if [[ -n $alias_args ]]; then
            local compl_func="${new_completion/#* -F /}"; compl_func="${compl_func%% *}"
            # avoid recursive call loops by ignoring our own functions
            if [[ "${compl_func#_$namespace::}" == $compl_func ]]; then
                local compl_wrapper="_${namespace}::${alias_name}"
                    echo "function $compl_wrapper {
                        (( COMP_CWORD += ${#alias_arg_words[@]} ))
                        COMP_WORDS=($alias_cmd $alias_args \${COMP_WORDS[@]:1})
                        (( COMP_POINT -= \${#COMP_LINE} ))
                        COMP_LINE=\${COMP_LINE/$alias_name/$alias_cmd $alias_args}
                        (( COMP_POINT += \${#COMP_LINE} ))
                        $compl_func
                    }" >> "$tmp_file"
                    new_completion="${new_completion/ -F $compl_func / -F $compl_wrapper }"
            fi
        fi

        # replace completion trigger by alias
        new_completion="${new_completion% *} $alias_name"
        echo "$new_completion" >> "$tmp_file"
    done < <(alias -p | sed -Ene "s/$alias_regex/\1 '\2' '\3'/p")
    source "$tmp_file" && command rm -f "$tmp_file" &> /dev/null
}; alias_completion

# starship prompt
eval "$(starship init bash)"
eval "$(zoxide init bash)"