#!/bin/bash

# Copyright (C) 2018, Xavier <yadd@debian.org>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 3 of the License, or (at your
# option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details.
#
# On Debian systems, the complete text of the GNU General Public License
# version 3 can be found in the /usr/share/common-licenses/GPL-3 file.

set -u
#set -x

TESTTYPE=Git
. ./lib_test_uscan

COMMAND="chronic_sh uscan --no-conf --compression=xz --dehs"

# prevent the local from messing with this test
export GIT_CONFIG_NOGLOBAL=1
export HOME=""
export XDG_CONFIG_HOME=""

# comment out for debug
#COMMAND="$COMMAND --verbose"
#COMMAND="$COMMAND --debug"

cleanup(){
    rm -rf "$TEMP_PKG_DIR"
}

spawnGitRepo(){
    mkdir -p "$TEMP_PKG_DIR/repo"
    (cd "$TEMP_PKG_DIR/repo" || exit 1
    chronic_sh git init
    git config user.name "Joe Developer"
    git config user.email "none@debian.org"
    touch changelog file.c extra.c
    echo 'extra.c export-ignore' >.gitattributes
    chronic_sh git add changelog file.c extra.c .gitattributes
    chronic_sh git commit -a -m 'Init'
    for version in 1.0 2.0; do
        echo "# Version $version" >> file.c
        cat >> changelog <<END
Version $version

END
        chronic_sh git commit -a -m "Releasing $version"
        chronic_sh git tag -s -u 72543FAF -m "Version $version" "v$version"
    done)
}

trap cleanup EXIT

containsName(){
  echo "$1" | grep -F -q "$2"
  echo $?
}

# shellcheck source=shunit2-helper-functions.sh
. "${0%/*}/shunit2-helper-functions.sh"

PKG=foo

makeDebianDir() {
    WATCHARGS=$1
    TEMP_PKG_DIR=$(mktemp -d --tmpdir="$SHUNIT_TMPDIR" uscan_git.XXXXXX)
    if [ -z "$TEMP_PKG_DIR" ]; then
        echo "Failed to create temporary directory" >&2
        exit 1
    fi
    mkdir -p "$TEMP_PKG_DIR"/$PKG/debian/upstream
    mkdir -p "$TEMP_PKG_DIR"/$PKG/debian/source
    spawnGitRepo

    cat <<END > "$TEMP_PKG_DIR/$PKG/debian/watch"
version=4
opts="mode=git,gitmode=shallow,$WATCHARGS" \
file:///$TEMP_PKG_DIR/repo refs/tags/v([\\d\\.]+) debian
END

    cat <<END > "$TEMP_PKG_DIR/$PKG/debian/changelog"
$PKG (0-1) unstable; urgency=low

  * Initial release

 -- Joe Developer <jd@debian.org>  Mon, 02 Nov 2013 22:21:31 -0100
END
    echo '3.0 (quilt)' > "$TEMP_PKG_DIR/$PKG/debian/source/format"
    cp -f "$test_dir/uscan/PUBLIC_KEY.asc" "$TEMP_PKG_DIR/$PKG/debian/upstream/signing-key.asc"
}

makeDebianDirWithUpstream() {
    WATCHARGS=$1
    makeDebianDir "$WATCHARGS"
    cd "$TEMP_PKG_DIR/$PKG" || exit 1
    chronic_sh git init
    chronic_sh git remote add upstream "file:///$TEMP_PKG_DIR/repo"
    chronic_sh git fetch upstream
    cd - > /dev/null || exit 1
}

makeDebianDirHead() {
    WATCHARGS=$1
    makeDebianDir "$WATCHARGS"
    cat <<END > "$TEMP_PKG_DIR/$PKG/debian/watch"
version=4
opts="mode=git,pretty=0.0+git%cd.%h" \
file:///$TEMP_PKG_DIR/repo HEAD
END
}

helperLaunch() {
    WATCHARGS=$1
    ARG="${2:-}"
    CMD_ARG="${3:-}"
    if test "$ARG" = "upstream"; then
        makeDebianDirWithUpstream "$WATCHARGS"
    elif test "$ARG" = "HEAD"; then
        makeDebianDirHead "$WATCHARGS"
    else
        makeDebianDir "$WATCHARGS"
    fi
    ( cd "$TEMP_PKG_DIR/$PKG" || exit 1 ; $COMMAND $CMD_ARG --watchfile=debian/watch )
    assertEquals "uscan: exit_code!=0 but exit_code=0" "$?" "0"
}

testGit() {
    helperLaunch "pgpmode=none"
    TARBALL=${PKG}_2.0.orig.tar.xz
    assertTrue 'downloaded tarfile not present' "[ -f '$TEMP_PKG_DIR/${PKG}-2.0.tar.xz' ]"
    assertTrue 'pristine tarball is not created' "[ -f '$TEMP_PKG_DIR/$TARBALL' ]"
    assertTrue 'pristine tarball is a symlink' "[ -L '$TEMP_PKG_DIR/$TARBALL' ]"
    cleanup
}

testGitHead() {
    helperLaunch "pgpmode=none" HEAD
    ORIG=$(find "$TEMP_PKG_DIR" | perl -ne 'print if/\/foo.*\.orig\.tar\.xz$/')
    UPSTREAM=$(find "$TEMP_PKG_DIR" | perl -ne 'print if/\/foo.*(?<!orig)\.tar\.xz$/')
    assertTrue 'downloaded tarfile not present' "[ -f '$UPSTREAM' ]"
    assertTrue 'pristine tarball is not created' "[ -f '$ORIG' ]"
    assertTrue 'pristine tarball is a symlink' "[ -L '$ORIG' ]"
    cleanup
}

testGitSignedTag() {
    helperLaunch "pgpmode=gittag"
    TARBALL=${PKG}_2.0.orig.tar.xz
    assertTrue 'downloaded tarfile not present' "[ -f '$TEMP_PKG_DIR/${PKG}-2.0.tar.xz' ]"
    assertTrue 'pristine tarball is not created' "[ -f '$TEMP_PKG_DIR/$TARBALL' ]"
    assertTrue 'pristine tarball is a symlink' "[ -L '$TEMP_PKG_DIR/$TARBALL' ]"
    cleanup
}

testGitUpstream() {
    helperLaunch "pgpmode=none" upstream
    TARBALL=${PKG}_2.0.orig.tar.xz
    assertTrue 'downloaded tarfile not present' "[ -f '$TEMP_PKG_DIR/${PKG}-2.0.tar.xz' ]"
    assertTrue 'pristine tarball is not created' "[ -f '$TEMP_PKG_DIR/$TARBALL' ]"
    assertTrue 'pristine tarball is a symlink' "[ -L '$TEMP_PKG_DIR/$TARBALL' ]"
    cleanup
}

testGitUpstreamSignedTag() {
    helperLaunch "pgpmode=gittag" upstream
    TARBALL=${PKG}_2.0.orig.tar.xz
    assertTrue 'downloaded tarfile not present' "[ -f '$TEMP_PKG_DIR/${PKG}-2.0.tar.xz' ]"
    assertTrue 'pristine tarball is not created' "[ -f '$TEMP_PKG_DIR/$TARBALL' ]"
    assertTrue 'pristine tarball is a symlink' "[ -L '$TEMP_PKG_DIR/$TARBALL' ]"
    cleanup
}

testGitIgnoreExclusions() {
    helperLaunch "gitexport=all"
    assertTrue 'downloaded tarfile is incomplete' \
        "tar tf '$TEMP_PKG_DIR/${PKG}-2.0.tar.xz' '${PKG}-2.0/extra.c'"
    cleanup
}

testGitUpstreamIgnoreExclusions() {
    helperLaunch "gitexport=all" upstream
    assertTrue 'downloaded tarfile is incomplete' \
        "tar tf '$TEMP_PKG_DIR/${PKG}-2.0.tar.xz' '${PKG}-2.0/extra.c'"
    cleanup
}

testGitSignedTagWithDestDir() {
    DESTDIR=$TEMP_PKG_DIR/destdir
    mkdir -p $DESTDIR
    helperLaunch "pgpmode=gittag" "" "--destdir $TEMP_PKG_DIR/destdir"
    TARBALL=${PKG}_2.0.orig.tar.xz
    assertTrue 'downloaded tarfile not present' "[ -f '$DESTDIR/${PKG}-2.0.tar.xz' ]"
    assertTrue 'pristine tarball is not created' "[ -f '$DESTDIR/$TARBALL' ]"
    assertTrue 'pristine tarball is a symlink' "[ -L '$DESTDIR/$TARBALL' ]"
    cleanup
}

# shellcheck disable=SC1091
. shunit2