#!/bin/bash
# backfill_releases.sh - Backfill Gitea releases for existing v0.1 tags
#
# For each tag passed (or all v0.1.1..v0.1.6 and v0.2.0), this script:
#   1. Builds the orca binary from the current milestone branch head
#      (v0.1 retrospective: phase tags marked ship points but the entry
#      point fix is consolidated into a single post-fix build; see
#      .ciagent/RELEASE_POLICY.md for the standing rule)
#   2. Injects the historical version via -ldflags
#   3. Packages a tarball
#   4. Creates a Gitea release with the tarball as an asset
#
# Idempotent: skips tags that already have a release.
#
# Usage: scripts/backfill_releases.sh [tag1 tag2 ...]

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
cd "$REPO_ROOT"

# Source .env for GITEA_TOKEN
for env_file in "$REPO_ROOT/.env" "$PWD/.env" "./.env"; do
  if [ -f "$env_file" ]; then
    set -a
    # shellcheck disable=SC1090
    . "$env_file"
    set +a
    break
  fi
done

err() { echo "backfill: error: $*" >&2; exit 1; }
info() { echo "backfill: $*"; }

: "${GITEA_TOKEN:?GITEA_TOKEN is required}"
command -v tea >/dev/null 2>&1 || err "tea CLI not on PATH"
command -v go >/dev/null 2>&1 || err "go not on PATH"
command -v tar >/dev/null 2>&1 || err "tar not on PATH"

REPO="coreci/orca"

# Default: backfill v0.1.1..v0.1.6 and v0.2.0
if [ $# -eq 0 ]; then
  TAGS=(v0.1.1 v0.1.2 v0.1.3 v0.1.4 v0.1.5 v0.1.6 v0.2.0)
else
  TAGS=("$@")
fi

# Existing releases to skip
EXISTING="$(tea releases list --repo "$REPO" --output simple 2>/dev/null | awk '{print $1}' || true)"

OS="$(uname -s | tr '[:upper:]' '[:lower:]')"
ARCH="$(uname -m)"
case "$ARCH" in
  x86_64) ARCH=amd64 ;;
  aarch64) ARCH=arm64 ;;
  armv7l) ARCH=armv7 ;;
esac

# Use the cached Go 1.25.0 toolchain explicitly
TOOLGO="/root/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.25.0.linux-amd64/bin/go"
if [ ! -x "$TOOLGO" ]; then
  TOOLGO="$(command -v go)"
fi

phase_name() {
  case "$1" in
    v0.1.1) echo "Phase 1: CLI skeleton" ;;
    v0.1.2) echo "Phase 2: Node management" ;;
    v0.1.3) echo "Phase 3: Task execution" ;;
    v0.1.4) echo "Phase 4: State persistence" ;;
    v0.1.5) echo "Phase 5: Health checks" ;;
    v0.1.6) echo "Phase 6: CoreCI release flow" ;;
    v0.2.0) echo "Milestone v0.1: Foundation complete" ;;
    *) echo "Orca $1" ;;
  esac
}

for TAG in "${TAGS[@]}"; do
  if echo "$EXISTING" | grep -qx "$TAG"; then
    info "skip $TAG (release exists)"
    continue
  fi

  info "=== $TAG ==="
  # The v0.1.1..v0.1.6 phase tags point to merge commits; the canonical
  # source of truth for v0.1 code is the current milestone branch HEAD
  # (which includes the main.go entry-point fix).
  BUILD_COMMIT="$(git rev-parse --short HEAD)"
  FULL_COMMIT="$(git rev-parse HEAD)"
  info "build from HEAD: $BUILD_COMMIT (per RELEASE_POLICY.md v0.1 retrospective)"

  BUILD_TIME="$(date -u +%Y-%m-%dT%H:%M:%SZ)"
  LDFLAGS="-s -w -X git.cloudinit.dev/coreci/orca/internal/cli.version=$TAG -X git.cloudinit.dev/coreci/orca/internal/cli.gitCommit=$BUILD_COMMIT -X git.cloudinit.dev/coreci/orca/internal/cli.buildTime=$BUILD_TIME"

  mkdir -p bin
  GOTOOLCHAIN=local "$TOOLGO" build -trimpath -ldflags="$LDFLAGS" -o bin/orca ./cmd/orca

  TARBALL="orca-${TAG}-${OS}-${ARCH}.tar.gz"
  tar -czf "$TARBALL" -C bin orca
  info "tarball: $TARBALL ($(du -h "$TARBALL" | cut -f1))"

  # Generate release notes
  PREV_TAG="$(git describe --tags --abbrev=0 "$TAG^" 2>/dev/null || true)"
  NOTES_FILE="$(mktemp)"
  PHASE_NAME="$(phase_name "$TAG")"
  {
    echo "# Release $TAG — ${PHASE_NAME}"
    echo ""
    echo "_Built: $BUILD_TIME from $BUILD_COMMIT (${FULL_COMMIT:0:12})_"
    echo ""
    echo "## Notes"
    echo ""
    echo "This release artifact is built from the v0.1 milestone branch HEAD"
    echo "(post entry-point fix). For v0.2+ and future milestones, every phase"
    echo "tag will be released with the binary as-of that exact commit; see"
    echo "\`.ciagent/RELEASE_POLICY.md\` for the standing rule."
    echo ""
    if [ -n "$PREV_TAG" ] && [ "$TAG" != "v0.2.0" ]; then
      echo "## Changes since $PREV_TAG"
      echo ""
      git log --pretty=format:'- %s' "${PREV_TAG}..${TAG}" 2>/dev/null | head -50
      echo ""
    fi
    if [ "$TAG" = "v0.2.0" ]; then
      echo "## Milestone v0.1: Foundation — All Phases"
      echo ""
      echo "All 6 phases of the v0.1 Foundation milestone are complete:"
      echo ""
      echo "- **Phase 1** (v0.1.1): CLI skeleton with Cobra, subcommand stubs, pre-push hook"
      echo "- **Phase 2** (v0.1.2): Node management with SQLite-backed registry"
      echo "- **Phase 3** (v0.1.3): Task execution engine with HCL specs, jobs, tasks, WaitDelay"
      echo "- **Phase 4** (v0.1.4): Local state persistence — audit log + migration runner"
      echo "- **Phase 5** (v0.1.5): Health-check daemon with /healthz, /readyz, /v1/* handlers"
      echo "- **Phase 6** (v0.1.6): CoreCI release flow with .coreci.yml and tea integration"
      echo ""
      echo "## Requirements Covered (21/24)"
      echo ""
      echo "REQ-001 Go 1.25+ toolchain, REQ-002 CLI-first single binary, REQ-003 Offline-first,"
      echo "REQ-004 Single-node task execution, REQ-005 modernc/sqlite CGO-free, REQ-006 slog"
      echo "audit logging, REQ-007 CoreCI release flow, REQ-008 Structured JSON logging,"
      echo "REQ-009 HCL/YAML job spec parsing, REQ-010 --json output flag, REQ-012 Config"
      echo "locations (~/.orca/, ORCA_DB), REQ-013 Pre-push hook, REQ-015 MIT LICENSE,"
      echo "REQ-016 README quickstart, REQ-017 context.Context propagation, REQ-018 %w error"
      echo "wrapping, REQ-019 Cobra CLI, REQ-020 hashicorp/hcl parser, REQ-021 os/exec"
      echo "WaitDelay, REQ-024 Makefile standard targets."
      echo ""
      echo "Deferred to v0.2: REQ-011/023 (mTLS), REQ-014 (gosec+govulncheck), REQ-022"
      echo "(iter.Seq streaming)."
      echo ""
      echo "## Changes since v0.1.6"
      echo ""
      git log --pretty=format:'- %s' "v0.1.6..${TAG}" 2>/dev/null | head -50
      echo ""
    fi
  } > "$NOTES_FILE"

  info "creating gitea release..."
  tea releases create "$TAG" \
    --repo "$REPO" \
    --title "Orca $TAG — ${PHASE_NAME}" \
    --note-file "$NOTES_FILE" \
    --asset "$TARBALL"

  info "✓ $TAG published"
  rm -f "$TARBALL"
done

info "all done"