#!/bin/bash

# Get the current version from the Cargo.toml file

if [[ ! -f Cargo.toml ]]; then
    echo "Could not find Cargo.toml file"
    echo "Run release from project root"
    exit 1
fi

CVER=$(grep -Po '(?<=^version = ")\d+\.\d+\.\d+(?="$)' ./Cargo.toml | head -1)

if [[ -z $1 ]]; then
    echo
    echo "  Current Version: $CVER"
    echo
    echo "  Usage: ./release <VERSION>"
    echo
    exit 1
fi

set -euo pipefail

if [[ $(git rev-parse --abbrev-ref HEAD) != "master" ]]; then
    echo "not ok - Must release on 'master' branch"
    exit 1
fi

if [[ $(git status -s | wc -l | grep -Po '\d+') -gt 0 ]]; then
    echo "not ok - Please commit all changes before releasing"
    exit 1
fi

NVER=$1

if [[ ! $(grep "v${NVER}" CHANGELOG.md | wc -l | grep -Po '^\d+') -eq 1 ]]; then
    echo "not ok - Add version to CHANGELOG.md before releasing"
    exit 1
fi

sed -i "s/\"$CVER\"/\"$NVER\"/" ./Cargo.toml
echo "ok - Updated Cargo.toml"

if [[ ! $(git diff Cargo.toml | grep '^+' | wc -l | grep -Po '^\d+') -eq 2 ]]; then
    echo "not ok - Failed to update Cargo.toml"
    exit 1
fi

sed -i "s/\"$CVER\"/\"$NVER\"/" ./src/lib.rs
echo "ok - Updated src/lib.rs"

if [[ ! $(git diff ./src/lib.rs | grep '^+' | wc -l | grep -Po '^\d+') -eq 2 ]]; then
    echo "not ok - Failed to update src/lib.rs"
    exit 1
fi

sed -i "s/$CVER/$NVER/" ./src/cli.yml
echo "ok - Updated src/cli.yml"

if [[ ! $(git diff ./src/cli.yml | grep '^+' | wc -l | grep -Po '^\d+') -eq 2 ]]; then
    echo "not ok - Failed to update src/cli.yml"
    exit 1
fi

# Get CHANGELOG INFO

CHANGE_START=$(echo $(grep -n "## v${NVER}" CHANGELOG.md | grep -Po '^\d+') + 1 | bc)
CHANGE_END=$(echo $(grep -n "## v${CVER}" CHANGELOG.md | grep -Po '^\d+') - 1 | bc)
CHANGE="$(sed -n "${CHANGE_START},${CHANGE_END}p" CHANGELOG.md)"

cargo build --release

git commit -am "v${NVER}"
git tag "v${NVER}"

git push
git push --tags

echo "ok - $CVER => $NVER"
echo "ok - release pushed!"
echo
echo "${CHANGE}"
echo
echo "ok - publish the new release - https://github.com/mapbox/Hecate/releases/new?tag=v${NVER}"