# Publish dist\release\v<version>\ (made by make_release.ps1) as a Gitea
# release: the release text is the version's section of CHANGELOG.md. The tag
# has to be pushed already. Re-running uploads only the files that are missing.
#
# Needs a Gitea access token with the write:repository scope
# (Settings -> Applications -> Generate New Token):
#
#   $env:GITEA_TOKEN = '<token>'
#   .\scripts\publish_release.ps1                version from src\sys.h
#   .\scripts\publish_release.ps1 -Version 1.0.1
param(
    [string]$Version,
    [string]$Token = $env:GITEA_TOKEN,
    [string]$Remote = 'origin'
)
$ErrorActionPreference = 'Stop'

$root = Split-Path $PSScriptRoot -Parent
if (-not $Version) {
    $m = Select-String -Path (Join-Path $root 'src\sys.h') -Pattern '#define\s+FW_VERSION_STR\s+"([^"]+)"'
    if (-not $m) { throw 'FW_VERSION_STR not found in src\sys.h' }
    $Version = $m.Matches[0].Groups[1].Value
}
$Version = $Version.TrimStart('v')
$tag = 'v' + $Version
$dir = Join-Path $root "dist\release\$tag"
if (-not (Test-Path $dir)) { throw "$dir not found: run scripts\make_release.ps1 first" }
if (-not $Token) { throw 'no token: set $env:GITEA_TOKEN (Gitea: Settings -> Applications -> Generate New Token, scope write:repository)' }

# http://server/owner/repo.git -> http://server/api/v1/repos/owner/repo
$url = (& git -C $root remote get-url $Remote).Trim()
if ($url -notmatch '^(https?://[^/]+)/(.+?)(\.git)?/?$') { throw "not an http(s) remote: $url" }
$api = "$($Matches[1])/api/v1/repos/$($Matches[2])"

# the release text: the lines under "## v<version>" up to the next "## "
$notes = New-Object System.Collections.Generic.List[string]
$inside = $false
foreach ($line in [IO.File]::ReadAllLines((Join-Path $root 'CHANGELOG.md'), [Text.Encoding]::UTF8)) {
    if ($line -match '^## ') {
        if ($inside) { break }
        $inside = $line -match "^## v?$([regex]::Escape($Version))\b"
    } elseif ($inside) {
        $notes.Add($line)
    }
}
if (-not $inside) { throw "no '## $tag' section in CHANGELOG.md" }
$body = ($notes -join "`n").Trim()

Add-Type -AssemblyName System.Net.Http
$http = New-Object System.Net.Http.HttpClient
$http.Timeout = [TimeSpan]::FromMinutes(10)
$http.DefaultRequestHeaders.Authorization = New-Object System.Net.Http.Headers.AuthenticationHeaderValue 'token', $Token

function Invoke-Gitea([string]$Method, [string]$Path, [System.Net.Http.HttpContent]$Content) {
    $req = New-Object System.Net.Http.HttpRequestMessage ([System.Net.Http.HttpMethod]::new($Method)), ($api + $Path)
    if ($Content) { $req.Content = $Content }
    $resp = $http.SendAsync($req).GetAwaiter().GetResult()
    $text = $resp.Content.ReadAsStringAsync().GetAwaiter().GetResult()
    $code = [int]$resp.StatusCode
    if ($code -ge 400 -and $code -ne 404) { throw "$Method $Path -> $code $text" }
    return [pscustomobject]@{ Code = $code; Json = $(if ($text) { $text | ConvertFrom-Json } else { $null }) }
}

if ((Invoke-Gitea GET "/tags/$tag").Code -eq 404) {
    throw "tag $tag is not on the server: git tag -a $tag -m $tag; git push $Remote $tag"
}

$r = Invoke-Gitea GET "/releases/tags/$tag"
if ($r.Code -eq 404) {
    $json = ConvertTo-Json @{ tag_name = $tag; name = $tag; body = $body; draft = $false; prerelease = $false }
    $r = Invoke-Gitea POST '/releases' (New-Object System.Net.Http.StringContent $json, ([Text.Encoding]::UTF8), 'application/json')
    Write-Host "Created release $tag"
} else {
    Write-Host "Release $tag exists, adding missing files"
}
$release = $r.Json
$have = @($release.assets | ForEach-Object { $_.name })

foreach ($f in Get-ChildItem $dir -File | Sort-Object Name) {
    if ($have -contains $f.Name) {
        Write-Host "  = $($f.Name) (already there)"
        continue
    }
    $file = [System.Net.Http.ByteArrayContent]::new([IO.File]::ReadAllBytes($f.FullName))
    $file.Headers.ContentType = [System.Net.Http.Headers.MediaTypeHeaderValue]::new('application/octet-stream')
    $form = New-Object System.Net.Http.MultipartFormDataContent
    $form.Add($file, 'attachment', $f.Name)
    Invoke-Gitea POST "/releases/$($release.id)/assets?name=$([Uri]::EscapeDataString($f.Name))" $form | Out-Null
    Write-Host ("  + {0} ({1:N0} KB)" -f $f.Name, ($f.Length / 1KB))
}
Write-Host "OK: $($release.html_url)" -ForegroundColor Green