<#
.SYNOPSIS
  Harat's Booking Deploy — builds and sends release to production server.

.DESCRIPTION
  1. Bumps version.json with current build timestamp
  2. Builds client (unless -SkipBuild)
  3. Creates a tar.gz archive (no node_modules, no .env)
  4. Uploads to server via SCP
  5. Runs deploy-remote.sh on the server via SSH

.PARAMETER Server
  Production server IP/hostname.

.PARAMETER User
  SSH username on the server.

.PARAMETER Port
  SSH port (default 2182).

.PARAMETER SkipBuild
  Skip client build (use existing dist/).

.EXAMPLE
  .\deploy\deploy.ps1                    # full deploy
  .\deploy\deploy.ps1 -SkipBuild         # skip client build
#>

param(
    [string]$Server = "178.169.87.152",
    [string]$User = "eugenius",
    [int]$Port = 2182,
    [switch]$SkipBuild
)

$ErrorActionPreference = "Stop"
$ProjectRoot = Split-Path -Parent $PSScriptRoot  # harats/
$DeployDir = "/apps/harats"

# -- Error reporting -------------------------------------------------------
function Write-DeployError {
    param(
        [string]$Step,
        [string]$Message,
        [string]$Detail = "",
        [string]$Hint = ""
    )
    Write-Host ""
    Write-Host "  +============================================+" -ForegroundColor Red
    Write-Host "  |         DEPLOY FAILED                      |" -ForegroundColor Red
    Write-Host "  +============================================+" -ForegroundColor Red
    Write-Host ""
    Write-Host "  Step:    " -NoNewline -ForegroundColor DarkGray
    Write-Host "$Step" -ForegroundColor White
    Write-Host "  Error:   " -NoNewline -ForegroundColor DarkGray
    Write-Host "$Message" -ForegroundColor Yellow
    if ($Detail) {
        Write-Host "  Detail:  " -NoNewline -ForegroundColor DarkGray
        Write-Host "$Detail" -ForegroundColor Gray
    }
    if ($Hint) {
        Write-Host ""
        Write-Host "  Hint:    " -NoNewline -ForegroundColor DarkGray
        Write-Host "$Hint" -ForegroundColor Cyan
    }
    Write-Host ""
}

# -- Main deploy pipeline --------------------------------------------------
$currentStep = "Init"
try {

    # -- 1. Read version --
    $currentStep = "[1/5] Version read"
    $versionFile = Join-Path $ProjectRoot "version.json"
    if (-not (Test-Path $versionFile)) {
        throw "version.json not found at: $versionFile"
    }
    $versionData = Get-Content $versionFile -Raw | ConvertFrom-Json
    $version = $versionData.version
    if (-not $version) { throw "version.json is missing the 'version' field" }
    $build = Get-Date -Format "yyyyMMdd-HHmm"
    $tag = "${version}+${build}"

    Write-Host ""
    Write-Host "=======================================" -ForegroundColor Cyan
    Write-Host "  Harat's Deploy - v${tag}" -ForegroundColor Cyan
    Write-Host "  Target: ${User}@${Server}:${Port}" -ForegroundColor Cyan
    Write-Host "=======================================" -ForegroundColor Cyan
    Write-Host ""

    # -- 2. Update version.json --
    $currentStep = "[1/5] Version update"
    $versionData.build = $build
    $versionData.buildDate = (Get-Date -Format "o")
    $jsonOut = $versionData | ConvertTo-Json -Depth 3
    [System.IO.File]::WriteAllText($versionFile, $jsonOut, [System.Text.UTF8Encoding]::new($false))
    Write-Host "[1/5] Version: $tag" -ForegroundColor Green

    # -- 3. Build client --
    $currentStep = "[2/5] Client build"
    if (-not $SkipBuild) {
        Write-Host "[2/5] Building client..." -ForegroundColor Yellow

        # Build shared first
        $sharedDir = Join-Path $ProjectRoot "packages\shared"
        if (Test-Path (Join-Path $sharedDir "package.json")) {
            Push-Location $sharedDir
            try {
                npm run build 2>$null
            } finally {
                Pop-Location
            }
        }

        $clientDir = Join-Path $ProjectRoot "client"
        if (-not (Test-Path (Join-Path $clientDir "package.json"))) {
            throw "client/package.json not found -- is the workspace intact?"
        }

        Push-Location $clientDir
        try {
            npm run build
            if ($LASTEXITCODE -ne 0) {
                throw "Vite build exited with code $LASTEXITCODE -- check the compiler output above"
            }
        } finally {
            Pop-Location
        }

        # Build server
        Write-Host "       Building server..." -ForegroundColor Yellow
        $serverDir = Join-Path $ProjectRoot "server"
        Push-Location $serverDir
        try {
            npm run build
            if ($LASTEXITCODE -ne 0) {
                throw "Server tsc build exited with code $LASTEXITCODE"
            }
        } finally {
            Pop-Location
        }

        Write-Host "       Build OK" -ForegroundColor Green
    } else {
        Write-Host "[2/5] Skipping build" -ForegroundColor DarkGray
    }

    # -- 4. Create archive --
    $currentStep = "[3/5] Archive creation"
    Write-Host "[3/5] Creating archive..." -ForegroundColor Yellow
    $archiveName = "harats-${tag}.tar.gz"
    $archivePath = Join-Path $ProjectRoot $archiveName

    # Verify git is available (needed for GNU tar)
    $gitCmd = Get-Command git -ErrorAction SilentlyContinue
    if (-not $gitCmd) {
        throw "git not found in PATH -- GNU tar from Git for Windows is required to create archives"
    }

    $gitRoot = $gitCmd.Source | Split-Path | Split-Path
    $gnuTar = Join-Path $gitRoot "usr\bin\tar.exe"
    if (-not (Test-Path $gnuTar)) {
        throw "GNU tar not found at: $gnuTar -- expected Git for Windows installation"
    }

    Push-Location $ProjectRoot
    try {
        $oldPath = $env:PATH
        $env:PATH = "$gitRoot\usr\bin;$env:PATH"

        & $gnuTar -czf $archiveName `
            --exclude="node_modules" `
            --exclude="*.tar.gz" `
            --exclude=".git" `
            --exclude="envs/prod/.env" `
            server/dist/ `
            server/prisma/ `
            server/package.json `
            server/package-lock.json `
            client/dist/ `
            packages/shared/ `
            Dockerfile `
            .dockerignore `
            docker-compose.prod.yml `
            ecosystem.config.cjs `
            version.json `
            envs/ `
            deploy/

        if ($LASTEXITCODE -ne 0) {
            throw "tar exited with code $LASTEXITCODE -- check file list for missing paths"
        }

        $env:PATH = $oldPath
    } finally {
        Pop-Location
    }

    if (-not (Test-Path $archivePath)) {
        throw "Archive was not created at: $archivePath"
    }

    $sizeMB = [math]::Round((Get-Item $archivePath).Length / 1MB, 1)
    if ($sizeMB -lt 0.1) {
        Write-Host "       Warning: archive is suspiciously small (${sizeMB} MB)" -ForegroundColor DarkYellow
    }
    Write-Host "       Archive: $archiveName - ${sizeMB} MB" -ForegroundColor Green

    # -- 5. Upload --
    $currentStep = "[4/5] SCP upload"
    Write-Host "[4/5] Uploading to ${Server}..." -ForegroundColor Yellow
    scp -P $Port $archivePath "${User}@${Server}:${DeployDir}/releases/"
    if ($LASTEXITCODE -ne 0) {
        $hint = switch ($LASTEXITCODE) {
            255   { "Connection refused or auth failed. Check SSH key, port ($Port), and server availability." }
            1     { "SCP error -- target directory ${DeployDir}/releases/ may not exist on the server." }
            default { "SCP exited with code $LASTEXITCODE." }
        }
        throw $hint
    }
    Write-Host "       Upload OK" -ForegroundColor Green

    # -- 6. Remote deploy --
    $currentStep = "[5/5] Remote deploy (SSH)"
    Write-Host "[5/5] Deploying on server..." -ForegroundColor Yellow
    ssh -p $Port "${User}@${Server}" "cd ${DeployDir}; cp deploy/deploy-remote.sh /tmp/_harats-deploy.sh; bash /tmp/_harats-deploy.sh '${archiveName}' '${tag}'"
    if ($LASTEXITCODE -ne 0) {
        $hint = switch ($LASTEXITCODE) {
            255   { "SSH connection failed. Is the server reachable at ${Server}:${Port}?" }
            126   { "deploy-remote.sh exists but is not executable." }
            127   { "deploy-remote.sh not found on server at ${DeployDir}/deploy/deploy-remote.sh" }
            default { "Remote script exited with code $LASTEXITCODE -- check server logs" }
        }
        throw $hint
    }

    # -- Cleanup local archive --
    $currentStep = "Cleanup"
    Remove-Item $archivePath -Force -ErrorAction SilentlyContinue

    Write-Host ""
    Write-Host "=======================================" -ForegroundColor Green
    Write-Host "  Deployed Harat's v${tag}" -ForegroundColor Green
    Write-Host "=======================================" -ForegroundColor Green
    Write-Host ""

} catch {
    Write-DeployError `
        -Step $currentStep `
        -Message $_.Exception.Message `
        -Detail ($_.ScriptStackTrace -split "`n" | Select-Object -First 3 | Out-String).Trim() `
        -Hint "Fix the issue above and re-run: .\deploy\deploy.ps1$(if ($SkipBuild) { ' -SkipBuild' })"

    # Cleanup partial archive if it exists
    if ($archivePath -and (Test-Path $archivePath -ErrorAction SilentlyContinue)) {
        Remove-Item $archivePath -Force -ErrorAction SilentlyContinue
    }

    exit 1
}