# Pure
# by Sindre Sorhus
# https://github.com/sindresorhus/pure
# MIT License

# For my own and others sanity
# git:
# %b => current branch
# %a => current action (rebase/merge)
# prompt:
# %F => color dict
# %f => reset color
# %~ => current path
# %* => time
# %n => username
# %m => shortname host
# %(?..) => prompt conditional - %(condition.true.false)


# turns seconds into human readable time
# 165392 => 1d 21h 56m 32s
prompt_pure_human_time() {
  local tmp=$1
    local days=$(( tmp / 60 / 60 / 24 ))
    local hours=$(( tmp / 60 / 60 % 24 ))
    local minutes=$(( tmp / 60 % 60 ))
    local seconds=$(( tmp % 60 ))
    (( $days > 0 )) && echo -n "${days}d "
    (( $hours > 0 )) && echo -n "${hours}h "
    (( $minutes > 0 )) && echo -n "${minutes}m "
    echo "${seconds}s"
}

# fastest possible way to check if repo is dirty
prompt_pure_git_dirty() {
# check if we're in a git repo
  command git rev-parse --is-inside-work-tree &>/dev/null || return
# check if it's dirty
    [[ "$PURE_GIT_UNTRACKED_DIRTY" == 0 ]] && local umode="-uno" || local umode="-unormal"
    command test -n "$(git status --porcelain --ignore-submodules ${umode})"

    (($? == 0)) && echo '*'
}

# displays the exec time of the last command if set threshold was exceeded
prompt_pure_cmd_exec_time() {
  local stop=$EPOCHSECONDS
    local start=${cmd_timestamp:-$stop}
  integer elapsed=$stop-$start
    (($elapsed > ${PURE_CMD_MAX_EXEC_TIME:=5})) && prompt_pure_human_time $elapsed
}

prompt_pure_preexec() {
  cmd_timestamp=$EPOCHSECONDS

# shows the current dir and executed command in the title when a process is active
    print -Pn "\e]0;"
    echo -nE "$PWD:t: $2"
    print -Pn "\a"
}

# string length ignoring ansi escapes
prompt_pure_string_length() {
  echo ${#${(S%%)1//(\%([KF1]|)\{*\}|\%[Bbkf])}}
}

prompt_pure_precmd() {
# shows the full path in the title
  print -Pn '\e]0;%~\a'

# git info
    vcs_info

    local prompt_pure_preprompt="\n%F{blue}%~%F{242}$vcs_info_msg_0_`prompt_pure_git_dirty` $prompt_pure_username%f %F{yellow}`prompt_pure_cmd_exec_time`%f"
    print -P $prompt_pure_preprompt

# check async if there is anything to pull
    (( ${PURE_GIT_PULL:-1} )) && {
# check if we're in a git repo
      command git rev-parse --is-inside-work-tree &>/dev/null &&
# make sure working tree is not $HOME
        [[ "$(command git rev-parse --show-toplevel)" != "$HOME" ]] &&
# check check if there is anything to pull
        command git fetch &>/dev/null &&
# check if there is an upstream configured for this branch
        command git rev-parse --abbrev-ref @'{u}' &>/dev/null && {
          local arrows=''
            (( $(command git rev-list --right-only --count HEAD...@'{u}' 2>/dev/null) > 0 )) && arrows='⇣'
            (( $(command git rev-list --left-only --count HEAD...@'{u}' 2>/dev/null) > 0 )) && arrows+='⇡'
            print -Pn "\e7\e[A\e[1G\e[`prompt_pure_string_length $prompt_pure_preprompt`C%F{cyan}${arrows}%f\e8"
        }
    } &!

# reset value since `preexec` isn't always triggered
  unset cmd_timestamp
}


prompt_pure_setup() {
# prevent percentage showing up
# if output doesn't end with a newline
  export PROMPT_EOL_MARK=''

    prompt_opts=(cr subst percent)

    zmodload zsh/datetime
    autoload -Uz add-zsh-hook
    autoload -Uz vcs_info

    add-zsh-hook precmd prompt_pure_precmd
    add-zsh-hook preexec prompt_pure_preexec

    zstyle ':vcs_info:*' enable git
    zstyle ':vcs_info:git*' formats ' %b'
    zstyle ':vcs_info:git*' actionformats ' %b|%a'

# show username@host if logged in through SSH
    [[ "$SSH_CONNECTION" != '' ]] && prompt_pure_username='%n@%m '

# prompt turns red if the previous command didn't exit with 0
    PROMPT='%(?.%F{magenta}.%F{red})❯%f '
}

prompt_pure_setup "$@"