#!/bin/bash

set -u

ORIGIN=origin
UPSTREAM=$ORIGIN
MASTER=$UPSTREAM/master
DEBUG=${DEBUG:- 0}

if [[ $# -gt 0 && "$1" == "-dry" ]]; then
  DRY=true
else
  DRY=false
fi

function log() {
  if (( $DEBUG )); then
    echo "$*"
  fi
}

function run() {
  log "$*"
  if [[ $DRY != "true" ]]; then
    "$@"
  fi
}

function git_alias() {
  local name="$1"
  local value="$2"
  git_set "alias.$name" "$value"
}

function git_unalias() {
  local name="$1"
  git_unset "alias.$name"
}

function git_set() {
  local name="$1"
  local value="$2"
  run git config --global "$name" "$value"
}

function git_unset() {
  local name="$1"
  run git config --global --unset "$name"
}

function can_run() {
  local application="$1"
  command -v "$application" > /dev/null
}

function activate_delta() {
  git_set core.pager delta
  git_set interactive.diffFilter "delta --color-only"
  git_set delta.navigate true
  git_set delta.side-by-side false
  git_set merge.conflictstyle diff3
  git_set diff.colorMoved default
}

function deactivate_delta() {
  git_unset core.pager
  git_unset interactive.diffFilter
  git_unset delta.navigate
  git_unset delta.side-by-side
}

function activate_diff_so_fancy() {
  git_set core.pager "diff-so-fancy | less --tabs=4 -RFX"
  git_set interactive.diffFilter "diff-so-fancy --patch"
}

function set_colors() {
  git_set color.ui true

  git_set color.diff-highlight.oldNormal    "red bold"
  git_set color.diff-highlight.oldHighlight "red bold 52"
  git_set color.diff-highlight.newNormal    "green bold"
  git_set color.diff-highlight.newHighlight "green bold 22"

  git_set color.diff.meta       "11"
  git_set color.diff.frag       "magenta bold"
  git_set color.diff.func       "146 bold"
  git_set color.diff.commit     "yellow bold"
  git_set color.diff.old        "red bold"
  git_set color.diff.new        "green bold"
  git_set color.diff.whitespace "red reverse"
}

function unset_colors() {
  git_unset color.diff-highlight.oldNormal
  git_unset color.diff-highlight.oldHighlight
  git_unset color.diff-highlight.newNormal
  git_unset color.diff-highlight.newHighlight

  git_unset color.diff.meta
  git_unset color.diff.frag
  git_unset color.diff.func
  git_unset color.diff.commit
  git_unset color.diff.old
  git_unset color.diff.new
  git_unset color.diff.whitespace
}

git_set core.editor vim

git_alias st status

git_alias br branch
git_alias brd 'branch -d'
git_alias brD 'branch -D'
git_alias wipe $'!sh -c \'git push $1 --delete $2\' -'
git_alias rename "branch -m"
git_alias brl "for-each-ref --sort=-committerdate refs/heads/ --format='%(committerdate:short) %(refname:short)'"
git_alias copy 'branch --copy'

git_alias co checkout
git_alias cob "checkout -b"
git_alias sw switch
# https://docs.gitlab.com/ee/user/project/merge_requests/reviews/index.html#checkout-merge-requests-locally-through-the-head-ref
git_alias mr $'!sh -c \'git fetch $1 merge-requests/$2/head:mr-$1-$2 && git checkout mr-$1-$2\' -'

git_alias ci commit
git_alias cif "commit --fixup"
git_alias cia "commit --amend"
git_alias cian "commit --amend --no-edit -a"
git_alias cim "commit -m"
git_alias ciw "commit -m WIP"

git_alias f fetch
git_alias fp "fetch -p"
git_alias fpa "fetch -p --all"
git_alias fpo "fetch -p origin"

git_alias pu $'!sh -c \'git push origin $(git branch --show-current)\''
git_alias puf $'!sh -c \'git push -f origin $(git branch --show-current)\''

git_alias rb rebase
git_alias rbi "rebase -i --autosquash"
git_alias rbim "rebase -i --autosquash $MASTER"
git_alias rba "rebase --abort"
git_alias rbc "rebase --continue"
git_alias rbs "rebase --skip"
git_alias rbm "rebase $MASTER"

git_alias unstage "reset HEAD --"
git_alias undo "reset --soft HEAD^"

git_alias ls "log --oneline"
git_alias lsd 'log --pretty=format:"%ad %C(yellow)%h%C(reset) %s" --date=short'
git_alias lsda 'log --pretty=format:"%ad %C(yellow)%h %C(Cyan)[%an]%C(reset) %s" --date=short'
git_alias slog "log --stat"
git_alias lola "log --graph --decorate --pretty=oneline --abbrev-commit --all --date=local"
git_alias hs "log --pretty='%C(yellow)%h %C(cyan)%cd %Cblue%aN%C(auto)%d %Creset%s' --graph --date=relative --date-order"

git_alias sh stash
git_alias shs "stash save"
git_alias shl "stash list"
git_alias sha "stash apply"
git_alias shp "stash pop"
git_alias shd "stash drop"

git_alias aliases "config --get-regexp alias"
git_alias configs "config --list"

#if can_run diff-so-fancy; then
#  activate_diff_so_fancy
#fi

if can_run delta; then
  log "Activate delta"
  activate_delta
fi