#!/usr/bin/env bash
# shellcheck shell=bash
# Default Go workflow: tidy → fmt → vet → test → build
# Runs automatically when `docker run casjaysdev/go` is called with no args.
# Working directory is expected to be a Go module root (go.mod must exist).
set -euo pipefail

# Resolve the working directory — prefer /app if mounted, else cwd
GO_EXITCODE=0
WORK_DIR="${GOWORKDIR:-${PWD}}"
cd "$WORK_DIR"

# Require a go.mod so we fail fast with a clear message instead of cryptic go errors
if [ ! -f "go.mod" ]; then
  echo "Error: no go.mod found in ${WORK_DIR}" >&2
  echo "Mount your project with: docker run --rm -v \"\$(pwd)\":/app casjaysdev/go" >&2
  exit 1
fi

MODULE="$(awk '/^module /{print $2}' go.mod)"
echo ""
echo "▶ Go workflow: ${MODULE}"
echo "  Working dir: ${WORK_DIR}"
echo ""

run_step() {
  local label="$1"; shift
  local exitCode=0
  echo "── ${label}"
  "$@"
  exitCode=$?
  echo ""
  return $exitCode
}

# 1. Sync module graph and go.sum before anything reads them
run_step "go mod tidy" go mod tidy
retVal=$?
GO_EXITCODE=$((GO_EXITCODE + retVal))
# 2. Format all Go source files in place
run_step "gofmt -w ." gofmt -w .
retVal=$?
GO_EXITCODE=$((GO_EXITCODE + retVal))
# 3. Catch suspicious constructs
run_step "go vet ./..." go vet ./...
retval=$?
GO_EXITCODE=$((GO_EXITCODE + retVal))
# 4. Run tests — fail fast before wasting time on a build
run_step "go test ./..." go test ./...
retVal=$?
GO_EXITCODE=$((GO_EXITCODE + retVal))
# 5. Build all main packages; output lands alongside source in each package dir
run_step "go build ./..." go build ./...
retVal=$?
GO_EXITCODE=$((GO_EXITCODE + retVal))

echo "✅ Done."
exit $GO_EXITCODE