name: Release

# Triggered when a vX.Y.Z tag is pushed. Builds the plugin against the
# current Dalamud staging branch, locates the latest.zip produced by
# DalamudPackager and attaches it to the matching GitHub Release.
#
# User-controlled inputs touched by this workflow:
#   - the tag name (filtered by on.tags = v*, validated again at runtime
#     against ^v\d+\.\d+\.\d+$ before being used in any string)
# All other values are either repo-controlled (paths under
# HellionChat/bin/Release derived from Get-ChildItem) or pinned URLs to
# goatcorp / GitHub. Nothing from a webhook event payload (issue/PR
# titles, commit messages, etc.) flows into a run-step.

on:
  push:
    tags:
      - 'v*'
  # Manual recovery trigger. Use when a tag was pushed but the auto-run
  # was missed or failed: `gh workflow run release.yml -f tag=v0.6.1`.
  # The tag input is validated against the same semver regex as the
  # auto-trigger before any string interpolation happens.
  workflow_dispatch:
    inputs:
      tag:
        description: 'Existing tag to (re)release, e.g. v0.6.1'
        required: true
        type: string

permissions:
  contents: write

jobs:
  release:
    name: Build and attach release ZIP
    runs-on: windows-latest
    timeout-minutes: 20

    steps:
      # On push:tags, github.ref_name is the tag — checkout default works.
      # On workflow_dispatch, ref defaults to the branch the action was
      # invoked from; we need to explicitly check out the tag the user
      # supplied so the build comes from the tagged commit, not main.
      - name: Checkout
        uses: actions/checkout@v6
        with:
          ref: ${{ github.event.inputs.tag || github.ref }}

      - name: Setup .NET 10
        uses: actions/setup-dotnet@v5
        with:
          dotnet-version: 10.0.x

      - name: Download Dalamud staging
        shell: pwsh
        run: |
          $hooks = Join-Path $env:APPDATA "XIVLauncher\addon\Hooks\dev"
          New-Item -ItemType Directory -Force -Path $hooks | Out-Null
          Invoke-WebRequest -Uri https://goatcorp.github.io/dalamud-distrib/stg/latest.zip -OutFile dalamud.zip
          Expand-Archive -Force -Path dalamud.zip -DestinationPath $hooks

      - name: Build (Release)
        run: dotnet build HellionChat/HellionChat.csproj --configuration Release

      - name: Locate latest.zip
        id: locate
        shell: pwsh
        run: |
          $zip = Get-ChildItem -Path HellionChat\bin\Release -Recurse -Filter latest.zip | Select-Object -First 1
          if (-not $zip)
          {
              throw "latest.zip not found under HellionChat\bin\Release"
          }
          Write-Host "Found: $($zip.FullName)"
          "path=$($zip.FullName)" | Out-File -FilePath $env:GITHUB_OUTPUT -Append

      # Build a release body from the matching changelog block in
      # HellionChat.yaml plus a static install / docs footer. Fails the
      # workflow if no block exists for the tagged version, which is the
      # automated counterpart to the "yaml + repo.json + release body
      # kept in sync" rule.
      #
      # GITHUB_REF_NAME is read via env: (not ${{ }} interpolation) so the
      # tag value is treated as a PowerShell variable, not as inline shell
      # text. The strict regex below rejects anything that is not a clean
      # semver tag before it is used to build a string.
      - name: Generate release body
        shell: pwsh
        env:
          # workflow_dispatch carries the user-supplied tag in inputs.tag;
          # push:tags carries it in github.ref_name. Either way the value
          # is treated as a PowerShell variable (env-var pass), not as
          # inline shell text, and validated against the semver regex
          # below before any string interpolation.
          TAG_NAME: ${{ github.event.inputs.tag || github.ref_name }}
        run: |
          $tag = $env:TAG_NAME
          if ($tag -notmatch '^v\d+\.\d+\.\d+$') {
              throw "Refusing to generate release body for non-semver tag: $tag"
          }
          $version = $tag.Substring(1)

          $yamlPath = "HellionChat/HellionChat.yaml"
          $raw = Get-Content -Path $yamlPath -Raw

          $marker = "changelog: |-"
          $idx = $raw.IndexOf($marker)
          if ($idx -lt 0) { throw "changelog block not found in $yamlPath" }

          # changelog: is the last top-level key in the manifest, so
          # everything after the marker is the literal block. Strip the
          # 2-space yaml indent from each line.
          $afterMarker = $raw.Substring($idx + $marker.Length)
          $changelogBody = (($afterMarker -split "`r?`n") | ForEach-Object {
              if ($_ -match '^  ') { $_.Substring(2) } else { $_ }
          }) -join "`n"

          $header = "**Hellion Chat $version"
          $start = $changelogBody.IndexOf($header)
          if ($start -lt 0) {
              throw "No changelog entry for version $version found in $yamlPath. Update the changelog block before tagging a release."
          }

          $rest = $changelogBody.Substring($start)
          $nextHdr = $rest.IndexOf("`n`n**Hellion Chat ", 1)
          $trailer = $rest.IndexOf("`n`n---")

          if ($nextHdr -ge 0 -and ($trailer -lt 0 -or $nextHdr -lt $trailer)) {
              $currentBlock = $rest.Substring(0, $nextHdr).TrimEnd()
          } elseif ($trailer -ge 0) {
              $currentBlock = $rest.Substring(0, $trailer).TrimEnd()
          } else {
              $currentBlock = $rest.TrimEnd()
          }

          # Static install / docs / licence footer is maintained as a
          # separate file so the workflow YAML stays clean (no embedded
          # heredoc that would have to be indented under the run-block).
          $footerPath = ".github/release-footer.md"
          if (-not (Test-Path $footerPath)) {
              throw "Release footer template not found: $footerPath"
          }
          $footer = Get-Content -Path $footerPath -Raw

          $body = $currentBlock + "`n" + $footer
          $body | Out-File -FilePath release-body.md -Encoding utf8 -NoNewline

          Write-Host "Generated release body for $tag :"
          Write-Host "----------------------------------------"
          Write-Host $body
          Write-Host "----------------------------------------"

      - name: Attach to GitHub release
        uses: softprops/action-gh-release@v3
        with:
          # Explicit tag_name so the action targets the correct release in
          # both push:tags (auto) and workflow_dispatch (manual recovery)
          # modes. Without this, dispatch runs would default to the branch
          # ref (main) and fail to find the release.
          tag_name: ${{ github.event.inputs.tag || github.ref_name }}
          files: ${{ steps.locate.outputs.path }}
          body_path: release-body.md
          fail_on_unmatched_files: true
          generate_release_notes: false
