#Requires -Version 5.1
<#
.SYNOPSIS
  Настройка git на машине: user, SSH, Gitea keys, clone/update Rules.
#>
[CmdletBinding()]
param(
    [Parameter(Mandatory = $true)][string]$Root,
    [string]$RulesDest = '',
    [string]$CloneUrl = 'ssh://git@git.papatramp.ru:2222/PapaTramp/Rules.git',
    [string]$HttpsCloneUrl = 'https://git.papatramp.ru/PapaTramp/Rules.git',
    [switch]$SkipClone,
    [switch]$SkipProfile,
    [switch]$SkipGitSetup,
    [switch]$WhatIf
)

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

function Write-Step([string]$Message) { Write-Host "[*] $Message" -ForegroundColor Cyan }
function Write-Ok([string]$Message) { Write-Host "[+] $Message" -ForegroundColor Green }
function Write-Warn([string]$Message) { Write-Host "[!] $Message" -ForegroundColor Yellow }

function Read-KeyValueFile {
    param([string]$Path)
    $data = @{}
    if (-not (Test-Path -LiteralPath $Path)) { return $data }
    Get-Content -LiteralPath $Path | ForEach-Object {
        if ($_ -match '^([^#=]+)=(.*)$') {
            $data[$Matches[1].Trim()] = $Matches[2].Trim()
        }
    }
    return $data
}

function Test-MachineGitReady {
    param([string]$ConfigDir)

    $hostsConfig = Join-Path $ConfigDir 'git-ssh-hosts.conf'
    if (-not (Test-Path -LiteralPath $hostsConfig)) { return $false }

    $sshConfig = Join-Path $HOME '.ssh\config'
    if (-not (Test-Path -LiteralPath $sshConfig)) { return $false }

    $profiles = @{}
    $currentProfile = $null
    Get-Content -LiteralPath $hostsConfig | ForEach-Object {
        $line = $_.Trim()
        if ($line -match '^\[profile:(.+)\]$') {
            $currentProfile = $Matches[1]
            $profiles[$currentProfile] = @{}
            return
        }
        if ($line -match '^\[host:') { $currentProfile = $null; return }
        if ($line -match '^([^=]+)=(.*)$' -and $currentProfile) {
            $profiles[$currentProfile][$Matches[1].Trim()] = $Matches[2].Trim()
        }
    }

    $sshText = Get-Content -LiteralPath $sshConfig -Raw
    foreach ($profile in $profiles.Values) {
        $keyName = $profile.KeyName
        if (-not $keyName) { continue }
        $keyPath = Join-Path $HOME ".ssh\$keyName"
        if (-not (Test-Path -LiteralPath $keyPath)) { return $false }
    }

    if ($sshText -notmatch '(?m)^Host\s+git\.kalinamall\.ru\s*$') { return $false }
    return $true
}

function Ensure-RulesRepository {
    param(
        [string]$Destination,
        [string]$SshUrl,
        [string]$HttpsUrl
    )

    if (Test-Path -LiteralPath $Destination) {
        if (Test-Path (Join-Path $Destination '.git')) {
            if ($WhatIf) {
                Write-Step "WhatIf: git pull $Destination"
                return
            }
            Write-Step "Updating $Destination"
            git -C $Destination pull --ff-only
            Write-Ok 'CursorRules updated'
            return
        }

        $backup = "${Destination}.bak-$(Get-Date -Format 'yyyyMMdd-HHmmss')"
        Write-Warn "Replacing non-git folder: $Destination -> $backup"
        if (-not $WhatIf) {
            Move-Item -LiteralPath $Destination -Destination $backup
        }
    }

    if ($WhatIf) {
        Write-Step "WhatIf: clone -> $Destination"
        return
    }

    Write-Step "Cloning Rules via SSH: $SshUrl"
    git clone --depth 1 $SshUrl $Destination 2>&1 | Out-Null
    if ($LASTEXITCODE -eq 0) {
        Write-Ok "Cloned to $Destination"
        return
    }

    Write-Warn 'SSH clone failed - trying HTTPS (enter Gitea login once)'
    git clone --depth 1 $HttpsUrl $Destination
    if ($LASTEXITCODE -ne 0) {
        throw "Failed to clone Rules repository"
    }
    Write-Ok "Cloned via HTTPS to $Destination"
}

function Ensure-InitCursorProfile {
    param([string]$RulesDest)

    $profileHook = ". `"$RulesDest\init-cursor.ps1`""
    $profilePath = $PROFILE.CurrentUserAllHosts
    if (-not $profilePath) { $profilePath = $PROFILE.CurrentUserCurrentHost }

    if ($WhatIf) {
        Write-Step "WhatIf: profile hook -> $profilePath"
        return
    }

    $profileDir = Split-Path -Parent $profilePath
    if (-not (Test-Path -LiteralPath $profileDir)) {
        New-Item -ItemType Directory -Path $profileDir -Force | Out-Null
    }

    $profileText = if (Test-Path -LiteralPath $profilePath) {
        Get-Content -LiteralPath $profilePath -Raw
    } else {
        ''
    }

    if ($profileText -notmatch [regex]::Escape($profileHook)) {
        if ($profileText -and -not $profileText.EndsWith("`n")) { $profileText += "`n" }
        $profileText += $profileHook + "`n"
        Set-Content -LiteralPath $profilePath -Value $profileText.TrimEnd() -Encoding UTF8
        Write-Ok "Profile updated: $profilePath"
    }
}

if (-not $RulesDest) {
    $RulesDest = Join-Path $HOME 'CursorRules'
}

$configDir = Join-Path $Root 'local'
if (-not (Test-Path -LiteralPath $configDir)) {
    throw "Bootstrap config not found: $configDir"
}

$gitReady = Test-MachineGitReady -ConfigDir $configDir
$repoReady = Test-Path (Join-Path $RulesDest '.git')

if (-not $gitReady -and -not $SkipGitSetup) {
    Write-Step 'Machine bootstrap: git + SSH'

$userCfgPath = Join-Path $configDir 'git-user.conf'
if (Test-Path -LiteralPath $userCfgPath) {
    $userCfg = Read-KeyValueFile -Path $userCfgPath
    if ($userCfg.UserName -and -not $WhatIf) {
        git config --global user.name $userCfg.UserName | Out-Null
        Write-Ok "git user.name = $($userCfg.UserName)"
    }
    if ($userCfg.UserEmail -and -not $WhatIf) {
        git config --global user.email $userCfg.UserEmail | Out-Null
        Write-Ok "git user.email = $($userCfg.UserEmail)"
    }
}

$setupArgs = @{ ConfigDir = $configDir; WhatIf = $WhatIf.IsPresent }
& (Join-Path $Root 'scripts\Setup-GitSsh.ps1') @setupArgs

$registerArgs = @{ ConfigDir = $configDir; WhatIf = $WhatIf.IsPresent }
& (Join-Path $Root 'scripts\Register-GiteaSshKeys.ps1') @registerArgs

if (-not $WhatIf) {
    Write-Step 'Testing git@git.kalinamall.ru'
    ssh -T -o BatchMode=yes -o ConnectTimeout=10 git@git.kalinamall.ru 2>&1 | ForEach-Object { Write-Host $_ }
}
}
elseif ($gitReady) {
    Write-Ok 'Git SSH already configured'
}

if (-not $SkipClone -and -not $repoReady) {
    Ensure-RulesRepository -Destination $RulesDest -SshUrl $CloneUrl -HttpsUrl $HttpsCloneUrl
}
elseif ($repoReady -and -not $SkipClone -and -not $WhatIf) {
    Write-Ok "CursorRules repo OK: $RulesDest"
}

if (-not $SkipProfile) {
    Ensure-InitCursorProfile -RulesDest $RulesDest
}

Write-Ok 'Machine bootstrap complete'

# Export test function for init-cursor dot-source
function Test-CursorMachineGitReady {
    param([string]$ConfigDir = (Join-Path $HOME 'CursorRules\local'))
    return Test-MachineGitReady -ConfigDir $ConfigDir
}