[CmdletBinding()]
param(
    [string]$OutputRoot = (Join-Path (Split-Path -Parent $PSScriptRoot) 'third_party\json-family'),
    [switch]$Force
)

$ErrorActionPreference = 'Stop'
Set-StrictMode -Version Latest

$sources = @(
    @{
        Name = 'toon'
        Url = 'https://github.com/toon-format/toon.git'
    },
    @{
        Name = 'ison'
        Url = 'https://github.com/ISON-format/ison.git'
    },
    @{
        Name = 'zon'
        Url = 'https://github.com/ZON-Format/zon-TS.git'
    },
    @{
        Name = 'tonl'
        Url = 'https://github.com/tonl-dev/tonl.git'
    }
)

New-Item -ItemType Directory -Force -Path $OutputRoot | Out-Null

foreach ($source in $sources) {
    $target = Join-Path $OutputRoot $source.Name
    if (Test-Path -LiteralPath $target) {
        if ($Force) {
            Remove-Item -LiteralPath $target -Recurse -Force
        }
        else {
            git -C $target fetch --all --tags --prune
            git -C $target pull --ff-only
            if ($LASTEXITCODE -ne 0) {
                throw "Failed to update $($source.Name) specs in $target"
            }
            continue
        }
    }

    git clone --depth 1 $source.Url $target
    if ($LASTEXITCODE -ne 0) {
        throw "Failed to clone $($source.Name) specs from $($source.Url)"
    }
}

@{
    generated_at = (Get-Date).ToUniversalTime().ToString('o')
    purpose = 'Spec, fixture, and golden-test source snapshots only; not runtime dependencies.'
    sources = $sources
} | ConvertTo-Json -Depth 4 | Set-Content -LiteralPath (Join-Path $OutputRoot 'manifest.json') -Encoding utf8NoBOM