# Covers Phase 2 of sync_repos.ps1 -- the registry reconciliation that decides whether a
# directory found on the Codex side gets ingested, collapsed, or reported. Runs against a
# throwaway primary + registries + bare origin under TEMP; the real machine is never touched.

$ErrorActionPreference = "Stop"
$scriptUnderTest = Join-Path (Split-Path $PSScriptRoot -Parent) "scripts\sync_repos.ps1"
$root = Join-Path ([IO.Path]::GetTempPath()) ("tools-sync-repos-test-" + [guid]::NewGuid().ToString("N"))

function New-Skill([string]$Path, [string]$Body) {
    New-Item -ItemType Directory -Force -Path $Path | Out-Null
    Set-Content -LiteralPath (Join-Path $Path "SKILL.md") -Value $Body -Encoding utf8
}

try {
    $primary = Join-Path $root "primary"
    $codex = Join-Path $root "codex"
    $agents = Join-Path $root "agents"
    New-Item -ItemType Directory -Force -Path $primary, $codex, $agents | Out-Null

    # One skill of each shape the reconciler must tell apart.
    New-Skill (Join-Path $primary "shared") "shared body"
    New-Skill (Join-Path $primary "forked") "primary body"
    New-Skill (Join-Path $agents "shared") "shared body"          # identical duplicate -> collapse
    New-Skill (Join-Path $agents "forked") "registry body"        # divergent -> conflict
    New-Skill (Join-Path $agents "codexborn") "born on the codex side"   # registry-only -> ingest
    New-Item -ItemType Directory -Force -Path (Join-Path $agents "notaskill") | Out-Null  # no SKILL.md
    # A link into the other registry rather than the primary: the drift case.
    New-Item -ItemType Junction -Path (Join-Path $codex "shared") -Target (Join-Path $agents "shared") | Out-Null

    # Host-installed shape: the real directory lives in a registry and the PRIMARY is the link
    # (Orca installs this way). Collapsing the registry copy here would make the link point at
    # itself and delete the only copy - the reconciler must recognise it and keep its hands off.
    New-Skill (Join-Path $agents "hostowned") "installed by the host"
    New-Item -ItemType Junction -Path (Join-Path $primary "hostowned") -Target (Join-Path $agents "hostowned") | Out-Null

    # A local bare repo stands in for origin so Phase 1 completes and Phase 2 actually runs.
    $origin = Join-Path $root "origin.git"
    & git init --quiet --bare $origin
    & git init --quiet --initial-branch=main $primary
    & git -C $primary remote add origin $origin
    & git -C $primary -c user.email=t@t -c user.name=t commit --quiet --allow-empty -m init
    & git -C $primary push --quiet -u origin main

    # Invoked via -Command, not -File: -File stringifies every argument, so a [string[]]
    # parameter silently takes only its first element and the rest slide into later positions.
    $ErrorActionPreference = "Continue"
    $invocation = "& '$scriptUnderTest' -RepoUrl '$origin' -ClaudeSkills '$primary' " +
                  "-Registry @('$codex','$agents') -MirrorRegistry '$codex'"
    $output = & powershell -NoProfile -ExecutionPolicy Bypass -Command $invocation 2>&1 | Out-String
    $ErrorActionPreference = "Stop"

    if ($output -notmatch 'INGEST registry-only skill:\s*codexborn') { throw "codex-side skill was not ingested`n$output" }
    if (-not (Test-Path (Join-Path $primary "codexborn\SKILL.md"))) { throw "ingested skill is not in the primary`n$output" }
    if ((Get-Item (Join-Path $agents "codexborn")).LinkType -ne "Junction") { throw "ingested skill was not linked back`n$output" }

    if ($output -notmatch 'MISDIRECTED link:\s*shared') { throw "link into another registry not detected`n$output" }
    $sharedTarget = (Get-Item (Join-Path $codex "shared")).Target | Select-Object -First 1
    if ($sharedTarget -ne (Join-Path $primary "shared")) { throw "misdirected link not repointed at the primary, got $sharedTarget`n$output" }
    if ((Get-Item (Join-Path $agents "shared")).LinkType -ne "Junction") { throw "identical duplicate did not collapse`n$output" }

    if ($output -notmatch 'CONFLICT:\s*forked') { throw "divergent duplicate not reported`n$output" }
    if ((Get-Item (Join-Path $agents "forked")).LinkType -eq "Junction") { throw "divergent duplicate must be left untouched`n$output" }
    if ((Get-Content -Raw (Join-Path $primary "forked\SKILL.md")) -notmatch 'primary body') { throw "primary was overwritten by a conflict`n$output" }

    if ($output -notmatch 'not a skill dir') { throw "directory without SKILL.md not reported`n$output" }

    # The host-installed skill must survive intact, with the primary still a link at the registry.
    $hostReal = Get-Item -Force (Join-Path $agents "hostowned")
    if ($hostReal.LinkType -eq "Junction") { throw "host-installed skill's real dir was collapsed into a link`n$output" }
    if ((Get-Content -Raw (Join-Path $agents "hostowned\SKILL.md")) -notmatch 'installed by the host') { throw "host-installed skill's content was lost`n$output" }
    $hostPrimary = Get-Item -Force (Join-Path $primary "hostowned")
    if (($hostPrimary.Target | Select-Object -First 1) -ne (Join-Path $agents "hostowned")) { throw "primary link to the host-installed skill was repointed`n$output" }
    # Mirroring it into the registry Codex scans would register the same skill twice.
    if (Test-Path (Join-Path $codex "hostowned")) { throw "host-installed skill was mirrored, double-registering it`n$output" }
    # Mirror registry must expose every primary skill, including the freshly ingested one.
    foreach ($name in @("shared", "forked", "codexborn")) {
        if (-not (Test-Path (Join-Path $codex "$name\SKILL.md"))) { throw "mirror missing $name`n$output" }
    }
    # Phase 1's success line is the ls-remote gate's verdict (upstream wording).
    if ($output -notmatch 'verified: origin/main =') { throw "Phase 1 did not complete`n$output" }

    Write-Host "PASS: registry ingest / repair / conflict fixtures"
} finally {
    Remove-Item -LiteralPath $root -Recurse -Force -ErrorAction SilentlyContinue
}