#requires -Version 5.1
<#
    install.ps1 — Deploys the Claude Code "cship" statusline onto this machine.

    Idempotent: safe to run repeatedly. Copies the three assets to their target
    locations, auto-detects the local pwsh path, and merges the statusLine block
    into an existing ~/.claude/settings.json without touching other settings.
#>
[CmdletBinding()]
param(
    # Overwrite an existing cship.toml even if one is already present.
    [switch]$Force
)

$ErrorActionPreference = 'Stop'
$assets = Join-Path $PSScriptRoot 'assets'

function Write-Step { param($m) Write-Host "  $m" -ForegroundColor Cyan }
function Write-Ok   { param($m) Write-Host "  OK  $m" -ForegroundColor Green }
function Write-Warn { param($m) Write-Host "  !!  $m" -ForegroundColor Yellow }

Write-Host "`nClaude Code statusline installer" -ForegroundColor White

# --- Target locations -------------------------------------------------------
$localBin = Join-Path $env:USERPROFILE '.local\bin'
$config   = Join-Path $env:USERPROFILE '.config'
$claude   = Join-Path $env:USERPROFILE '.claude'
foreach ($d in @($localBin, $config, $claude)) {
    New-Item -ItemType Directory -Force -Path $d | Out-Null
}

# --- 1. cship.exe -----------------------------------------------------------
Copy-Item (Join-Path $assets 'cship.exe') (Join-Path $localBin 'cship.exe') -Force
Write-Ok "cship.exe -> $localBin"

# --- 2. cship.toml (do not clobber a customised config unless -Force) --------
$tomlTarget = Join-Path $config 'cship.toml'
if ((Test-Path $tomlTarget) -and -not $Force) {
    Write-Warn "cship.toml already exists, kept as-is (use -Force to overwrite)"
} else {
    Copy-Item (Join-Path $assets 'cship.toml') $tomlTarget -Force
    Write-Ok "cship.toml -> $config"
}

# --- 3. Wrapper script ------------------------------------------------------
$wrapperTarget = Join-Path $claude 'cship-statusline.ps1'
Copy-Item (Join-Path $assets 'cship-statusline.ps1') $wrapperTarget -Force
Write-Ok "cship-statusline.ps1 -> $claude"

# --- 4. Locate pwsh ---------------------------------------------------------
$pwsh = (Get-Command pwsh -ErrorAction SilentlyContinue).Source
if (-not $pwsh) {
    $fallback = 'C:\Program Files\PowerShell\7\pwsh.exe'
    if (Test-Path $fallback) {
        $pwsh = $fallback
    } else {
        Write-Warn "PowerShell 7 (pwsh) not found. Install it, then re-run this script."
        Write-Warn "  winget install --id Microsoft.PowerShell -e"
        $pwsh = $fallback   # write the conventional path so it works once pwsh is installed
    }
}
$pwshFwd    = $pwsh.Replace('\', '/')
$wrapperFwd = $wrapperTarget.Replace('\', '/')
$command    = '"{0}" -NoProfile -ExecutionPolicy Bypass -File "{1}"' -f $pwshFwd, $wrapperFwd

# --- 5. Merge statusLine into settings.json ---------------------------------
$settingsPath = Join-Path $claude 'settings.json'
if (Test-Path $settingsPath) {
    Copy-Item $settingsPath "$settingsPath.bak" -Force
    $settings = Get-Content $settingsPath -Raw | ConvertFrom-Json
} else {
    $settings = [PSCustomObject]@{}
}

$statusLine = [PSCustomObject]@{ type = 'command'; command = $command }
if ($settings.PSObject.Properties.Name -contains 'statusLine') {
    $settings.statusLine = $statusLine
} else {
    $settings | Add-Member -MemberType NoteProperty -Name 'statusLine' -Value $statusLine
}

$settings | ConvertTo-Json -Depth 20 | Set-Content $settingsPath -Encoding UTF8
Write-Ok "settings.json statusLine wired to detected pwsh"

# --- Post-install notes -----------------------------------------------------
Write-Host "`nDone." -ForegroundColor Green
Write-Host "Notes:" -ForegroundColor White
Write-Host "  ->  Icons use standard Unicode (emoji + block chars), so no Nerd Font is needed."
Write-Host "      Any emoji-capable terminal font works (Windows Terminal renders them via Segoe UI Emoji by default)."
Write-Host "  Restart Claude Code (or start a new session) to see the statusline.`n"