#!/bin/zsh
#cache=~/.cache/dmenu_run
freq="$HOME/.cache/dmenu_history_test"
alias_file="$HOME/.config/aliasrc"
dmenucmd='dmenu -i '

source $alias_file

#pull our previously run commands in
history=$(<$freq)
#for ones that have arguments, condense them down to an asterisk
history=$(sed "s/[[:space:]].*/*/" <<< "$history")

#generate list of commands including functions and alias'
#tail command gets rid of a few of the weird bash builtins
#at the beginning of the list
cache=$(compgen -a; compgen -c | grep -vxF "$(compgen -a)" | sort | tail -n +10)

# sort history by frequency of use
sorted=$(sort <<< "$history" | uniq -c | sort -hr | colrm 1 8)
filter=$(sed 's/[*;]*$//' <<< "$sorted")

echo "$filter"
# grep removes the duplicates from the unsorted list
cache_deduped=$(grep -vxF "$filter" <<< "$cache")

# run the actual dmenu and let the user choose a command
cmd="$(echo "$sorted"$'\n'"$cache_deduped" | $dmenucmd)"

# To remove a file from history:
# Trail the selected item with ;remove
if [[ $cmd == *";remove" ]]; then
    cmd=${cmd/;remove/}
    grep -vx "$cmd" $freq > temp
    mv temp $freq
    exit 0
fi

# expand an asterisked command to include argument history
regex='.+[*]$'
if [[ "$cmd" =~ $regex ]]; then
    history=$(grep "${cmd/[*]/}" $freq)
    sorted=$(sort <<< "$history" | uniq -c | sort -hr | colrm 1 8)
    # remove trailing whitespace and asterisks from arguments
    cmd=$(sed 's/[[:space:]*]*$//' <<< "$@")
    dmenucmd+=' -l 17'
    (sleep .1; xdotool key Tab) &
    cmd="$(echo "$sorted"$'\n'"$cache" | $dmenucmd)"
    if [[ $cmd == *";remove" ]]; then
        cmd=${cmd/;remove/}
        egrep -vx "$cmd" $freq > temp
        mv temp $freq
        exit 0
    fi
fi

if ! [ "$cmd" == "" ]; then
    # remember which commands have been run
    echo "$cmd" >> $freq
    cmdexec=$(alias | grep "${cmd/;/}=" | cut -f2 -d "'" | tr -d "'")
    if [ -z "$cmdexec" ]; then
        cmdexec=${cmd/;/}
    fi

    # open a command up in a terminal
    # a second semicolon holds the xterm open
    if [[ $cmd == *";;" ]]; then
        cmdexec="xterm -hold -e $cmdexec"
    elif [[ $cmd == *";" ]]; then
        cmdexec="xterm -e $cmdexec"
    fi

    # Workaround to run functions...
    echo "$cmdexec" | compgen -F "$cmdexec" | zsh -i
    # ...and aliases
    echo "$cmdexec" | zsh -i
fi