#!/usr/bin/env fish

abbr -a g --position command git

################################################################################
#                                  Functions                                   # 
################################################################################

function git_develop_branch
  command git rev-parse --git-dir &>/dev/null || return
  set -l branch
  
  for branch in dev devel develop development
    if command git show-ref -q --verify refs/heads/$branch
      echo $branch
      return 0
    end
  end

  echo develop
  return 1
end

function git_main_branch
  command git rev-parse --git-dir &>/dev/null || return
  set -l ref

  for ref in
    refs/{heads,remotes/{origin,upstream}}/{main,trunk,mainline,default,master}
    if command git show-ref -q --verify $ref
      echo (basename $ref)
      return 0
    end
  end

  echo main
  return 1
end

function git_current_branch
  set -l ref (git symbolic-ref --quiet HEAD 2>/dev/null)
  set -l ret $status

  if [ $ret -ne 0 ]
    [ $ret -eq 128 ] && return # no git repo
    set ref (git rev-parse --short HEAD 2>/dev/null) || return
  end

  echo (string replace "refs/heads/" "" $ref)
end

################################################################################
#                                   Staging                                    #
################################################################################

abbr -a ga   --position command "git add"
abbr -a gaa  --position command "git add --all"

# Interactively stage parts of a file.
abbr -a gapa --position command "git add --patch"

abbr -a gd   --position command "git diff"
abbr -a gds  --position command "git diff --staged"
abbr -a gdw  --position command "git diff --word-diff" # show diff by word
abbr -a gdsw --position command "git diff --staged --word-diff"

function gdnolock --wraps "git diff"
  git diff $argv ":(exclude)package-lock.json" ":(exclude)*.lock"
end

abbr -a gst  --position command "git status"
abbr -a gsts --position command "git status --short"

################################################################################
#                                  Committing                                  #
################################################################################

abbr -a gc      --position command "git commit"
abbr -a "gc!"   --position command "git commit --amend"
abbr -a "gcn!"  --position command "git commit --no-edit --amend"
abbr -a gca     --position command "git commit -a"
abbr -a "gca!"  --position command "git commit -a --amend"
abbr -a "gcan!" --position command "git commit -a --no-edit --amend"
abbr -a gcam    --position command "git commit -a -m"
abbr -a gcmsg   --position command "git commit -m"

abbr -a grev    --position command "git revert"

################################################################################
#                       Working Dir & Index Manipulation                       #
################################################################################

abbr -a gco   --position command "git checkout"

abbr -a grt   --position command "git reset"
# grt <commit> -- [<path>] - undo <commit> but keep changes in working dir.

abbr -a grts  --position command "git reset --soft"
# Undo commits and stage their changes.

abbr -a grs   --position command "git restore --worktree"
# grs <unstaged-path> - revert local changes for <unstaged-path>.
# (--worktree is the default behavior, but included here for clarity).

abbr -a grss  --position command "git restore --worktree --source"
# grss <commit> <unstaged-path> - revert <unstaged-path> to <commit>"s version.

abbr -a grst  --position command "git restore --staged"
# grst <staged-path> - unstage <staged-path>

abbr -a grsts --position command "git restore --staged --source"
# See grss, but for <staged-path>s.

abbr -a grsa  --position command "git restore --worktree --staged"
# grsa <path> - discard all changes for <path>, both staged and unstaged.

abbr -a grsas --position command "git restore --worktree --staged --source"

abbr -a grm   --position command "git rm"
# Remove paths from index & working dir.

abbr -a grmc  --position command "git rm --cached"
# Unstage & remove only from index; leave in working dir.
# grmc <path> - where <path> is already tracked: stages the removal of <path>

abbr -a gsta  --position command "git stash push"
# Save changes; add --message <message> to label stash.

abbr -a gstaa --position command "git stash push --include-untracked"
abbr -a gstap --position command "git stash pop" # retrieve changes
abbr -a gstal --position command "git stash list" # list stashes

abbr -a gstas --position command "git stash show --text"
# --text treats all files as text.

function gwip
  git add -A
  git rm (git ls-files --deleted) 2> /dev/null
  git commit -- -no-verify --no-gpg-sign --message "🚧 --wip-- [skip ci]"
end

function unwip
  git rev-list --max-count=1 --format="%s" HEAD | \
    grep -q "🚧 --wip-- [skip ci]" \
    && git reset HEAD~1
end

abbr -a gcl   --position command "git clean -f"
# Remove unknown (untracked and unignored) files.

abbr -a gcldr --position command "git clean --dry-run"

################################################################################
#                                   Branches                                   #
################################################################################

abbr -a gb   --position command "git branch"
abbr -a gcb  --position command "git checkout -b"
abbr -a gcm  --position command "git checkout $(git_main_branch)"
abbr -a gcd  --position command "git checkout $(git_develop_branch)"

abbr -a gm   --position command "git merge"
abbr -a gmtl --position command "git mergetool --no-prompt"
abbr -a gma  --position command "git merge --abort"

################################################################################
#                             History Manipulation                             #
################################################################################

abbr -a gbs  --position command "git bisect"
abbr -a gbsb --position command "git bisect bad"
abbr -a gbsg --position command "git bisect good"
abbr -a gbsr --position command "git bisect reset"
abbr -a gbss --position command "git bisect start"

################################################################################
#                           Interaction with Remote                            #
################################################################################

abbr -a gp      --position command "git push"
abbr -a gpv     --position command "git push -v"
abbr -a gpd     --position command "git push --dry-run"
abbr -a gpf     --position command "git push --force-with-lease --force-if-includes"
abbr -a gpfv    --position command "git push --force-with-lease --force-if-includes -v"
abbr -a "gpf!"  --position command "git push --force"
abbr -a "gpfv!" --position command "git push --force -v"

abbr -a gf      --position command "git fetch"

abbr -a gfa     --position command "git fetch --all --prune"
# Fetch all & remove invalid remote refs.

abbr -a gpl     --position command "git pull"
abbr -a gplr    --position command "git pull --rebase"

################################################################################
#                                     Logs                                     #
################################################################################

# Current branch.
abbr -a gl   --position command "git log --pretty=lc --graph"
abbr -a glo  --position command "git log --pretty=lo --graph --date=human"
abbr -a gls  --position command "git log --pretty=lo --graph --date=human --simplify-by-decoration"
abbr -a glf  --position command "git log --pretty=lf --graph"
abbr -a gld  --position command "git log --pretty=lf --graph --cc --stat"
abbr -a glp  --position command "git log --pretty=lf --graph --cc --patch"

# All branches on all remotes.
abbr -a gla  --position command "git log --pretty=lc --graph --all"
abbr -a glao --position command "git log --pretty=lo --graph --all --date=human"
abbr -a glas --position command "git log --pretty=lo --graph --all --date=human --simplify-by-decoration"
abbr -a glaf --position command "git log --pretty=lf --graph --all"
abbr -a glad --position command "git log --pretty=lf --graph --all --cc --stat"
abbr -a glap --position command "git log --pretty=lf --graph --all --cc --patch"

################################################################################
#                           Shortcuts to Feel Smart                            #
################################################################################

function gprevision -a N path
  git checkout \
    (git log --online $path | awk -v commit="$N" "FNR == -commit+1 {print $N}") \
    $path
end
# gprevision <N> <path>
# Checkout the <N>th revision (counting backwards from HEAD) of <path>.
#
# e.g. to checkout the last version of example.txt:
# gprevision -1 example.txt

function gnevermind
  reset --hard HEAD && git clean -df
end

################################################################################
#                                    Notes                                     #
################################################################################

# A note on reset, restore, and revert, paraphrased from `man git`, plus my own
# on `rm`:
#
# revert - make a new commit that reverts a previous commit.
# restore - undo uncommitted changes in the working tree.
# reset - update the branch and change commit history.
# rm - same as system rm; remove files, either from git's knowledge, the working
#   directory, or both.
#
# These are not a description of the *possible* uses, rather a narrowing of the
# *intended* uses.

# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

# PATH VALUES:
# :/ - all files within the root of the working tree, so all files in the repo,
#   a la git add's --all option.