#!/usr/bin/env bash

# Build script for job-search release

set -euo pipefail

BUILD_DIR="build"
RELEASE_DIR="release"
DO_RELEASE=0

if [[ $* == *--release* ]]; then
    DO_RELEASE=1
fi

BUILD_TIME=$(date -u '+%Y-%m-%d_%H:%M:%S')
GIT_COMMIT=
VERSION=$(git describe --tags --abbrev=0 2>/dev/null || echo 'unknown')
VERSION_TAG=$(git describe --tags 2>/dev/null || echo 'unknown')

if [ "$VERSION" != "$VERSION_TAG" ]; then
    echo "Dirty commits detected, marking as development build"
    GIT_COMMIT=$(git rev-parse HEAD 2>/dev/null || echo 'unknown')
    GIT_COMMIT_SHORT=$(git rev-parse --short HEAD 2>/dev/null || echo 'unknown')
    VERSION="${VERSION}.${GIT_COMMIT_SHORT}"

    DO_RELEASE=0
    if [[ $* == *--release* && $* == *--force* ]]; then
        echo "Forcing release build anyway"
        DO_RELEASE=1
    fi
fi

LD_FLAGS=${LD_FLAGS:-""}
LD_FLAGS="$LD_FLAGS -X git.avsdev.uk/Go/job-search/internal/version.Version=${VERSION}"
if [[ $DO_RELEASE -ne 1 ]]; then
    LD_FLAGS="$LD_FLAGS -X git.avsdev.uk/Go/job-search/internal/version.BuildTime=${BUILD_TIME}"
fi
if [ "$GIT_COMMIT" != "" ]; then
    LD_FLAGS="$LD_FLAGS -X git.avsdev.uk/Go/job-search/internal/version.GitCommit=${GIT_COMMIT}"
fi

# Build the frontend and copy it to internal/frontend/dist, where the binary
# embeds it. npm ci installs exactly the lock file's versions: always for a
# release, otherwise only when nothing is installed yet.
if [[ $DO_RELEASE -eq 1 || ! -d web/node_modules ]]; then
    (cd web && npm ci)
fi
(cd web && npm run build && npm run sync)

# Process any generators
go generate ./...

# Build binary with version info
# sqlite_fts5 compiles in SQLite's FTS5 module, needed by the store's title
# search (migration 6 fails without it)
go build \
    -tags sqlite_fts5 \
    -ldflags="$LD_FLAGS" \
    -trimpath \
    -o $BUILD_DIR/job-search-$VERSION \
    ./cmd/jobsearch

echo "Built $BUILD_DIR/job-search-$VERSION"

# If proper release, copy to output directory for packaging, with the
# systemd unit and logrotate configuration (see README.md, "Running as a
# service")
if [[ $DO_RELEASE -eq 1 ]]; then
    install -DT $BUILD_DIR/job-search-$VERSION $RELEASE_DIR/job-search
    install -DT -m 644 deploy/job-search.service $RELEASE_DIR/job-search.service
    install -DT -m 644 deploy/job-search.logrotate $RELEASE_DIR/job-search.logrotate
    ARCH=`dpkg --print-architecture`
    # Owned by root (0:0), not the user who built it, with no names
    tar -czf $RELEASE_DIR/job-search-$VERSION-$ARCH.tar.gz \
      --owner=0 --group=0 --numeric-owner \
      --transform "s,^$RELEASE_DIR/,job-search-$VERSION-$ARCH/," \
      $RELEASE_DIR/job-search $RELEASE_DIR/job-search.service \
      $RELEASE_DIR/job-search.logrotate
    echo "Installed $RELEASE_DIR/job-search"
fi