# lib/providers.ps1 - every gateway provider, read from providers.json, and lookups into them.
#
# Part of claude-mode.ps1, which dot-sources it into its own script scope after
# the settings at its top. Not meant to run on its own. ASCII only: Windows
# PowerShell 5.1 reads a .ps1 without a BOM as ANSI. $PSScriptRoot here would be
# lib\, so paths beside the main script go through $script:Here.

# ---------------------------------------------------------------------------
# Providers
#
# Every gateway provider is an entry in providers.json, next to this script and
# shared with the POSIX build: endpoint, auth, how its model list is fetched,
# which doctor checks apply. This script only knows the *kinds* of behaviour
# (Get-ProviderCatalogue, Test-PresetCatalogue) and picks one by name from the
# entry, so a provider that reuses them needs no change here. anthropic is
# built in: it is the native login, not a gateway.
# ---------------------------------------------------------------------------

$script:ProvidersPath = Join-Path $script:Here 'providers.json'
$script:Providers = @()
try {
    $__pj = Get-Content -LiteralPath $script:ProvidersPath -Raw -Encoding UTF8 | ConvertFrom-Json
    $script:Providers = @($__pj.providers | Where-Object { $_.id })
} catch { }
if ($script:Providers.Count -eq 0) {
    Write-Host "  FAIL providers.json missing or unreadable at $($script:ProvidersPath) - re-run install.ps1" -ForegroundColor Red
    exit 1
}

$script:Modes     = @('anthropic') + @($script:Providers | ForEach-Object { [string]$_.id })
$script:ModeLabel = @{ 'anthropic' = 'Anthropic  - your subscription login, no gateway' }

# `claude-mode <provider>` with no preset named uses this one. Deliberately a
# fixed choice rather than "most recently used", so the command is predictable.
$script:ProviderDefaultPreset = @{}
foreach ($__p in $script:Providers) {
    $script:ModeLabel[[string]$__p.id] = [string]$__p.label
    $script:ProviderDefaultPreset[[string]$__p.id] = $(if ($__p.defaultPreset) { [string]$__p.defaultPreset } else { [string]$__p.id })
}

function Get-Provider {
    param([string] $Id)
    return ($script:Providers | Where-Object { $_.id -eq $Id } | Select-Object -First 1)
}

# An id or an alias (z.ai, z-ai) to the provider id; $null if neither.
function Resolve-ProviderId {
    param([string] $Word)
    $w = ([string]$Word).ToLower()
    foreach ($p in $script:Providers) {
        if ([string]$p.id -eq $w -or (@($p.aliases) -contains $w)) { return [string]$p.id }
    }
    return $null
}

function Test-ProviderDoctor {
    param([string] $Id, [string] $Check)
    $p = Get-Provider $Id
    return [bool]($p -and (@($p.doctor) -contains $Check))
}