name: Migrate Production Database (manual only)

on:
  workflow_dispatch:
    inputs:
      deploy_sha:
        description: Full current production release SHA to migrate
        required: true
        type: string
      recovery_reference:
        description: Backup or PITR recovery reference; multiple migration files are not atomic as a set
        required: true
        type: string
      recovery_created_at:
        description: Recovery point creation time in UTC, exactly YYYY-MM-DDTHH:MM:SSZ and no more than 24 hours old
        required: true
        type: string
      restore_verified:
        description: Confirm that this recovery point has passed a restore verification
        required: true
        default: false
        type: boolean

permissions:
  contents: read
  actions: read

concurrency:
  group: production-mutation
  cancel-in-progress: false
  queue: max

jobs:
  migrate:
    runs-on: xiaoxin
    timeout-minutes: 20
    env:
      GITEA_SHA: ${{ gitea.sha }}
      GITEA_API_URL: ${{ gitea.api_url }}
      GITEA_REPOSITORY: ${{ gitea.repository }}
      GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
      REGISTRY_HOST: crpi-d1feco6itet73spp.cn-hongkong.personal.cr.aliyuncs.com
      IMAGE_REPOSITORY: crpi-d1feco6itet73spp.cn-hongkong.personal.cr.aliyuncs.com/copse/jyotisha
      DEPLOY_HOST: ${{ vars.PRODUCTION_HOST }}
      DEPLOY_PORT: ${{ vars.PRODUCTION_PORT }}
      DEPLOY_USER: ${{ vars.PRODUCTION_USER }}
      DEPLOY_PATH: ${{ vars.PRODUCTION_PATH }}
      STAGING_URL: ${{ vars.STAGING_URL }}
      PRODUCTION_KNOWN_HOSTS: ${{ vars.PRODUCTION_KNOWN_HOSTS }}
    steps:
      - name: Validate current production revision and successful gates
        id: revision
        env:
          DEPLOY_SHA: ${{ inputs.deploy_sha }}
          RECOVERY_REFERENCE: ${{ inputs.recovery_reference }}
          RECOVERY_CREATED_AT: ${{ inputs.recovery_created_at }}
          RESTORE_VERIFIED: ${{ inputs.restore_verified }}
        run: |
          set -euo pipefail
          [[ "$DEPLOY_SHA" =~ ^[0-9a-f]{40}$ ]] || { echo "deploy_sha must be a lowercase full commit SHA" >&2; exit 1; }
          [[ "$STAGING_URL" == "https://staging.jyotisha.chat" ]] || { echo "unexpected staging acceptance URL" >&2; exit 1; }
          [[ "$RECOVERY_REFERENCE" =~ ^[A-Za-z0-9][A-Za-z0-9._:/@+-]{0,199}$ ]] || {
            echo "recovery_reference must be 1-200 safe reference characters" >&2
            exit 1
          }
          [[ "$RECOVERY_CREATED_AT" =~ ^[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}Z$ ]] || {
            echo "recovery_created_at must be UTC in YYYY-MM-DDTHH:MM:SSZ format" >&2
            exit 1
          }
          [[ "$RESTORE_VERIFIED" == "true" ]] || {
            echo "restore_verified=true is required for a production schema migration" >&2
            exit 1
          }
          python3 - "$RECOVERY_CREATED_AT" <<'PY'
          from datetime import datetime, timedelta, timezone
          import sys

          try:
              created_at = datetime.strptime(sys.argv[1], "%Y-%m-%dT%H:%M:%SZ").replace(tzinfo=timezone.utc)
          except ValueError as error:
              raise SystemExit(f"invalid recovery_created_at: {error}")
          age = datetime.now(timezone.utc) - created_at
          if age < timedelta(0) or age > timedelta(hours=24):
              raise SystemExit("recovery_created_at must be no more than 24 hours old and not in the future")
          PY
          echo "Recovery attested: reference=$RECOVERY_REFERENCE created_at=$RECOVERY_CREATED_AT restore_verified=true"
          echo "WARNING: migration files run sequentially and are not atomic as a whole; recovery may be required after a partial migration." >&2
          read_ref_sha() {
            local branch="$1"
            curl --fail --silent --show-error --connect-timeout 15 --max-time 60 --retry 3 --retry-all-errors \
              --header "Authorization: token $GITEA_TOKEN" \
              "$GITEA_API_URL/repos/$GITEA_REPOSITORY/git/refs/heads/$branch" |
              jq -er --arg ref "refs/heads/$branch" '
                select(type == "array" and length == 1) |
                .[0] | select(.ref == $ref) | .object.sha |
                select(test("^[0-9a-f]{40}$"))
              '
          }
          staging_head="$(read_ref_sha staging)"
          main_head="$(read_ref_sha main)"
          [[ "$main_head" == "$DEPLOY_SHA" && "$staging_head" == "$DEPLOY_SHA" ]] || {
            echo "production migration requires main and staging to equal deploy_sha" >&2
            exit 1
          }
          [[ "$GITEA_SHA" == "$DEPLOY_SHA" ]] || {
            echo "dispatch the production migration workflow from the exact main release SHA" >&2
            exit 1
          }
          runs="$(curl --fail --silent --show-error \
            --header "Authorization: token $GITEA_TOKEN" \
            "$GITEA_API_URL/repos/$GITEA_REPOSITORY/actions/runs?head_sha=$DEPLOY_SHA&branch=staging&event=push&status=success&limit=100")"
          selected_run="$(jq -cer --arg sha "$DEPLOY_SHA" '
            [.workflow_runs[] | select(
              (.path | split("@")[0] | endswith("backend-quality-gate.yml")) and
              .head_sha == $sha and .head_branch == "staging" and
              .event == "push" and .conclusion == "success"
            )] | sort_by(.id) | reverse | first
          ' <<<"$runs")"
          gate_run_id="$(jq -er '.id' <<<"$selected_run")"
          [[ "$gate_run_id" =~ ^[0-9]+$ ]] || {
            echo "no successful exact-SHA staging backend quality gate found" >&2
            exit 1
          }
          release_runs="$(curl --fail --silent --show-error --connect-timeout 15 --max-time 60 --retry 3 --retry-all-errors \
            --header "Authorization: token $GITEA_TOKEN" \
            "$GITEA_API_URL/repos/$GITEA_REPOSITORY/actions/runs?head_sha=$DEPLOY_SHA&event=workflow_dispatch&status=success&limit=100")"
          jq -e --arg sha "$DEPLOY_SHA" '
            any(.workflow_runs[]?;
              (.path | split("@")[0] | endswith("release-quality-gate.yml")) and
              .head_sha == $sha and .event == "workflow_dispatch" and .conclusion == "success"
            )
          ' <<<"$release_runs" >/dev/null || {
            echo "no successful exact-SHA manual release quality gate found" >&2
            exit 1
          }
          observed_staging_sha="$(curl --fail --silent --show-error --connect-timeout 15 --max-time 30 --retry 3 --retry-all-errors \
            "$STAGING_URL/api/health" | jq -er '.deployment.gitCommit | select(test("^[0-9a-f]{40}$"))')"
          [[ "$observed_staging_sha" == "$DEPLOY_SHA" ]] || {
            echo "public staging has not accepted the requested SHA" >&2
            exit 1
          }
          {
            echo "sha=$DEPLOY_SHA"
            echo "gate_run_id=$gate_run_id"
            echo "recovery_reference=$RECOVERY_REFERENCE"
            echo "recovery_created_at=$RECOVERY_CREATED_AT"
            echo "restore_verified=true"
          } >>"$GITHUB_OUTPUT"

      - name: Prepare pinned Node tooling
        env:
          NODE_TOOL_SOURCE_IMAGE: swr.cn-north-4.myhuaweicloud.com/ddn-k8s/docker.io/library/node:22-bookworm-slim@sha256:ef343465b6a14bbdf2ab52f6e100ec0659a792464fcf72c462370d88b3df909c
          NODE_TOOL_IMAGE: node:22-bookworm-slim
        run: |
          set -euo pipefail
          if ! docker image inspect "$NODE_TOOL_SOURCE_IMAGE" >/dev/null 2>&1; then
            for attempt in 1 2 3; do
              if timeout 180 docker pull "$NODE_TOOL_SOURCE_IMAGE"; then
                break
              fi
              if [ "$attempt" -eq 3 ]; then
                echo "Failed to preload $NODE_TOOL_IMAGE after $attempt attempts" >&2
                exit 1
              fi
              sleep $((attempt * 15))
            done
          fi
          docker tag "$NODE_TOOL_SOURCE_IMAGE" "$NODE_TOOL_IMAGE"
          docker image inspect "$NODE_TOOL_IMAGE" >/dev/null
          tool_dir="$(mktemp -d "${RUNNER_TEMP:-/tmp}/jyotisha-node-tools.XXXXXX")"
          cat > "$tool_dir/node" <<'EOF'
          #!/usr/bin/env bash
          set -euo pipefail
          workdir="$(pwd -P)"
          exec docker run --rm \
            --user "$(id -u):$(id -g)" \
            --volume "$workdir:$workdir" \
            --workdir "$workdir" \
            --env HOME=/tmp \
            node:22-bookworm-slim "${0##*/}" "$@"
          EOF
          chmod 0755 "$tool_dir/node"
          ln -s node "$tool_dir/npm"
          test -n "${GITHUB_PATH:-}"
          printf '%s\n' "$tool_dir" >> "$GITHUB_PATH"
          export PATH="$tool_dir:$PATH"
          node --version
          npm --version

      - name: Download gate-produced migration manifest
        env:
          GATE_RUN_ID: ${{ steps.revision.outputs.gate_run_id }}
          DEPLOY_SHA: ${{ steps.revision.outputs.sha }}
        run: |
          set -euo pipefail
          artifact_prefix="staging-image-manifest-$DEPLOY_SHA-"
          artifacts="$(curl --fail --silent --show-error \
            --header "Authorization: token $GITEA_TOKEN" \
            "$GITEA_API_URL/repos/$GITEA_REPOSITORY/actions/runs/$GATE_RUN_ID/artifacts?limit=100")"
          selected_artifact="$(jq -cer --arg prefix "$artifact_prefix" '
            [(.artifacts // [])[]
              | select(.expired == false and (.name | startswith($prefix)))
              | . + {attempt: ((.name | ltrimstr($prefix)) | tonumber?)}
              | select(.attempt != null and .attempt >= 1)
            ] | sort_by(.attempt, .id) | reverse | first
          ' <<<"$artifacts")"
          artifact_name="$(jq -er '.name' <<<"$selected_artifact")"
          artifact_id="$(jq -er '.id' <<<"$selected_artifact")"
          artifact_attempt="${artifact_name#"$artifact_prefix"}"
          [[ "$artifact_name" == "$artifact_prefix"* ]]
          [[ "$artifact_attempt" =~ ^[1-9][0-9]*$ ]]
          [[ "$artifact_id" =~ ^[0-9]+$ ]]
          install -d -m 700 artifacts/staging-image
          curl --fail --silent --show-error --location \
            --header "Authorization: token $GITEA_TOKEN" \
            "$GITEA_API_URL/repos/$GITEA_REPOSITORY/actions/artifacts/$artifact_id/zip" \
            --output "${RUNNER_TEMP}/staging-image-manifest.zip"
          python3 - "${RUNNER_TEMP}/staging-image-manifest.zip" artifacts/staging-image <<'PY'
          import pathlib, stat, sys, zipfile
          archive = pathlib.Path(sys.argv[1])
          destination = pathlib.Path(sys.argv[2])
          allowed = {"manifest.env", "controller.tar"}
          with zipfile.ZipFile(archive) as bundle:
              entries = bundle.infolist()
              names = [entry.filename for entry in entries]
              if len(names) != len(set(names)) or set(names) != allowed:
                  raise SystemExit("invalid production migration artifact bundle")
              if sum(entry.file_size for entry in entries) > 3 * 1024 * 1024:
                  raise SystemExit("production migration artifact bundle is too large")
              for entry in entries:
                  path = pathlib.PurePosixPath(entry.filename)
                  mode = entry.external_attr >> 16
                  if path.is_absolute() or ".." in path.parts or path.name != entry.filename:
                      raise SystemExit("unsafe production migration artifact path")
                  if mode and not stat.S_ISREG(mode):
                      raise SystemExit("unsafe production migration artifact type")
                  target = destination / entry.filename
                  with bundle.open(entry) as source, target.open("xb") as output:
                      output.write(source.read())
          PY
          [[ -f artifacts/staging-image/manifest.env ]]
          [[ -f artifacts/staging-image/controller.tar ]]

      - name: Validate gate-attested controller and digest-pinned migration image
        id: image
        env:
          DEPLOY_SHA: ${{ steps.revision.outputs.sha }}
        run: |
          set -euo pipefail
          manifest=artifacts/staging-image/manifest.env
          controller_tar=artifacts/staging-image/controller.tar
          [[ "$(wc -l < "$manifest" | tr -d ' ')" == 4 ]]
          manifest_sha="$(awk -F= '$1 == "git_sha" {print $2}' "$manifest")"
          expected_controller_digest="$(awk -F= '$1 == "controller_sha256" {print $2}' "$manifest")"
          [[ "$manifest_sha" == "$DEPLOY_SHA" && "$expected_controller_digest" =~ ^[0-9a-f]{64}$ ]]
          printf '%s  %s\n' "$expected_controller_digest" "$controller_tar" | sha256sum --check --status
          python3 - "$controller_tar" <<'PY'
          import pathlib, sys, tarfile
          archive = pathlib.Path(sys.argv[1])
          required = {"deploy/run-production-migration.sh", "frontend/scripts/staging-image-manifest.mjs"}
          with tarfile.open(archive, "r:") as bundle:
              members = bundle.getmembers()
              names = [member.name for member in members]
              if len(names) != len(set(names)) or not required.issubset(names):
                  raise SystemExit("invalid production migration controller bundle")
              if sum(member.size for member in members) > 2 * 1024 * 1024:
                  raise SystemExit("production migration controller bundle is too large")
              for member in members:
                  path = pathlib.PurePosixPath(member.name)
                  if path.is_absolute() or ".." in path.parts or not (member.isdir() or member.isfile()):
                      raise SystemExit("unsafe production migration controller bundle")
          PY
          install -d -m 700 artifacts/staging-image/extracted
          tar -xf "$controller_tar" -C artifacts/staging-image/extracted
          node artifacts/staging-image/extracted/frontend/scripts/staging-image-manifest.mjs \
            "$manifest" "$DEPLOY_SHA" "$IMAGE_REPOSITORY" >>"$GITHUB_OUTPUT"

      - name: Apply production schema migration under pinned SSH identity
        env:
          SSH_PRIVATE_KEY_BASE64: ${{ secrets.PRODUCTION_SSH_PRIVATE_KEY }}
          REGISTRY_USERNAME: ${{ secrets.REGISTRY_USERNAME }}
          REGISTRY_PASSWORD: ${{ secrets.REGISTRY_PASSWORD }}
          DEPLOY_SHA: ${{ steps.revision.outputs.sha }}
          WEB_IMAGE: ${{ steps.image.outputs.web_image }}
          RECOVERY_REFERENCE: ${{ steps.revision.outputs.recovery_reference }}
          RECOVERY_CREATED_AT: ${{ steps.revision.outputs.recovery_created_at }}
          RESTORE_VERIFIED: ${{ steps.revision.outputs.restore_verified }}
        run: |
          set -euo pipefail
          [[ "$DEPLOY_HOST" == "118.194.235.34" ]]
          [[ "$DEPLOY_PORT" =~ ^[1-9][0-9]{0,4}$ ]] && (( DEPLOY_PORT <= 65535 ))
          [[ "$DEPLOY_USER" == "deploy" ]]
          [[ "$DEPLOY_PATH" == "/opt/jyotisha-production" ]]
          test -n "$PRODUCTION_KNOWN_HOSTS"
          ssh_root="${RUNNER_TEMP}/production-migration-ssh"
          key_path="$ssh_root/id_ed25519"
          known_hosts_path="$ssh_root/known_hosts"
          incoming=""
          install -m 700 -d "$ssh_root"
          test -n "$SSH_PRIVATE_KEY_BASE64"
          printf '%s' "$SSH_PRIVATE_KEY_BASE64" | base64 --decode > "$key_path"
          printf '%s\n' "$PRODUCTION_KNOWN_HOSTS" | tr -d '\r' > "$known_hosts_path"
          chmod 600 "$key_path" "$known_hosts_path"
          ssh-keygen -y -f "$key_path" >/dev/null
          ssh_options=(-i "$key_path" -p "$DEPLOY_PORT" -o BatchMode=yes -o IdentitiesOnly=yes -o ServerAliveInterval=15 -o ServerAliveCountMax=4 -o StrictHostKeyChecking=yes -o "UserKnownHostsFile=$known_hosts_path")
          remote="$DEPLOY_USER@$DEPLOY_HOST"
          require_current_release_heads() {
            current_staging="$(curl --fail --silent --show-error --connect-timeout 15 --max-time 60 --retry 3 --retry-all-errors \
              --header "Authorization: token $GITEA_TOKEN" \
              "$GITEA_API_URL/repos/$GITEA_REPOSITORY/git/refs/heads/staging" |
              jq -er 'select(type == "array" and length == 1) | .[0] |
                select(.ref == "refs/heads/staging") | .object.sha |
                select(test("^[0-9a-f]{40}$"))')"
            current_main="$(curl --fail --silent --show-error --connect-timeout 15 --max-time 60 --retry 3 --retry-all-errors \
              --header "Authorization: token $GITEA_TOKEN" \
              "$GITEA_API_URL/repos/$GITEA_REPOSITORY/git/refs/heads/main" |
              jq -er 'select(type == "array" and length == 1) | .[0] |
                select(.ref == "refs/heads/main") | .object.sha |
                select(test("^[0-9a-f]{40}$"))')"
            [[ "$current_main" == "$DEPLOY_SHA" && "$current_staging" == "$DEPLOY_SHA" ]] || {
              echo "main or staging advanced during production migration; refusing stale mutation" >&2
              exit 1
            }
          }
          cleanup() {
            if [[ -n "$incoming" ]]; then
              ssh "${ssh_options[@]}" "$remote" "sudo -n docker --config '$incoming/.docker' logout '$REGISTRY_HOST' >/dev/null 2>&1 || true; sudo -n rm -rf -- '$incoming'" >/dev/null 2>&1 || true
            fi
            rm -rf -- "$ssh_root"
          }
          trap cleanup EXIT
          incoming="$(ssh "${ssh_options[@]}" "$remote" "mktemp -d /tmp/jyotisha-production-migration.XXXXXXXXXX")"
          [[ "$incoming" == /tmp/jyotisha-production-migration.* ]]
          ssh "${ssh_options[@]}" "$remote" "install -d -m 700 '$incoming/.docker'"
          scp -i "$key_path" -P "$DEPLOY_PORT" -o BatchMode=yes -o IdentitiesOnly=yes -o StrictHostKeyChecking=yes -o "UserKnownHostsFile=$known_hosts_path" artifacts/staging-image/controller.tar "$remote:$incoming/controller.tar"
          ssh "${ssh_options[@]}" "$remote" "tar -xf '$incoming/controller.tar' -C '$incoming' && rm -f -- '$incoming/controller.tar'"
          previous_sha="$(ssh "${ssh_options[@]}" "$remote" "state='$DEPLOY_PATH/.state/deployed-revision'; id=\$(sudo -n docker ps -aq --filter 'label=com.docker.compose.project=jyotisha-production' --filter 'label=com.docker.compose.service=web' | head -n 1); if [ -n \"\$id\" ]; then sudo -n docker inspect --format '{{range .Config.Env}}{{println .}}{{end}}' \"\$id\" | sed -n 's/^GITHUB_SHA=//p' | head -n 1; elif [ -e \"\$state\" ]; then printf state-present-without-container; else printf not-deployed; fi")"
          [[ "$previous_sha" == not-deployed || "$previous_sha" =~ ^[0-9a-f]{40}$ ]] || exit 1
          forward_verified=false
          if [[ "$previous_sha" != not-deployed && "$previous_sha" != "$DEPLOY_SHA" ]]; then
            comparison="$(curl --fail --silent --show-error --connect-timeout 15 --max-time 60 --retry 3 --retry-all-errors \
              --header "Authorization: token $GITEA_TOKEN" \
              "$GITEA_API_URL/repos/$GITEA_REPOSITORY/compare/$previous_sha...$DEPLOY_SHA")"
            jq -e --arg base "$previous_sha" --arg head "$DEPLOY_SHA" '
              (.commits // []) as $commits |
              def parents($sha): [$commits[] | select(.sha == $sha) | (.parents // [])[] | .sha];
              def reaches($sha; $seen):
                if $sha == $base then true
                elif ($seen | index($sha)) != null then false
                else any(parents($sha)[]; . as $parent | reaches($parent; $seen + [$sha])) end;
              (.total_commits | type) == "number" and
              .total_commits == ($commits | length) and ($commits | length) > 0 and
              ([$commits[].sha] | length == (unique | length)) and reaches($head; [])
            ' <<<"$comparison" >/dev/null || { echo "production migration rollback or divergence refused" >&2; exit 1; }
            forward_verified=true
          fi
          require_current_release_heads
          printf '%s' "$REGISTRY_PASSWORD" | ssh "${ssh_options[@]}" "$remote" "sudo -n docker --config '$incoming/.docker' login '$REGISTRY_HOST' --username '$REGISTRY_USERNAME' --password-stdin"
          ssh "${ssh_options[@]}" "$remote" "sudo -n env INCOMING_PATH='$incoming' DEPLOY_PATH='$DEPLOY_PATH' WEB_IMAGE='$WEB_IMAGE' DEPLOY_SHA='$DEPLOY_SHA' EXPECTED_PREVIOUS_SHA='$previous_sha' FORWARD_REVISION_VERIFIED='$forward_verified' RECOVERY_REFERENCE='$RECOVERY_REFERENCE' RECOVERY_CREATED_AT='$RECOVERY_CREATED_AT' RESTORE_VERIFIED='$RESTORE_VERIFIED' DOCKER_CONFIG='$incoming/.docker' DOCKER_BIN='docker' bash '$incoming/deploy/run-production-migration.sh'"
          require_current_release_heads

      - name: Operator action
        run: echo 'Schema migration complete. Production ETL and application deployment remain separate manual operations.'