
<#
.SYNOPSIS
    将 themes/Ying/data/links.yaml 转换为 Friend-Circle-Lite 所需的 JSON 格式。

.DESCRIPTION
    读取 Hugo 数据文件 links.yaml，提取 name, url, image 字段，
    并生成 themes/Ying/static/json/link_lite.json 文件。
    生成的格式为:
    {
      "friends": [
        ["Name", "URL", "AvatarURL"],
        ...
      ]
    }

.EXAMPLE
    .\scripts\update_link_lite_json.ps1
#>

$yamlPath = Join-Path $PSScriptRoot "..\themes\Ying\data\links.yaml"
$jsonPath = Join-Path $PSScriptRoot "..\themes\Ying\static\json\link_lite.json"

Write-Host "Reading $yamlPath..."

if (-not (Test-Path $yamlPath)) {
    Write-Error "File not found: $yamlPath"
    exit 1
}

$content = Get-Content $yamlPath -Encoding UTF8
$friends = @()
$currentFriend = $null

foreach ($line in $content) {
    # Match start of a new list item: "  - name: Value"
    if ($line -match "^\s*-\s*name:\s*(.+)") {
        # Save previous friend if exists
        if ($currentFriend) { 
            # Only add if we have at least name and url
            if ($currentFriend.name -and $currentFriend.url) {
                $friends += ,$currentFriend 
            }
        }
        
        # Start new friend
        $currentFriend = [ordered]@{
            name = $matches[1].Trim()
            url = ""
            image = ""
        }
    }
    # Match properties
    elseif ($currentFriend -ne $null) {
        if ($line -match "^\s*url:\s*(.+)") {
            $currentFriend.url = $matches[1].Trim()
        }
        elseif ($line -match "^\s*image:\s*(.+)") {
            $currentFriend.image = $matches[1].Trim()
        }
        elseif ($line -match "^\s*avatar:\s*(.+)") {
            # Handle 'avatar' key just in case
            $currentFriend.image = $matches[1].Trim()
        }
    }
}
# Add the last one
if ($currentFriend -and $currentFriend.name -and $currentFriend.url) { 
    $friends += ,$currentFriend 
}

Write-Host "Found $($friends.Count) friends."

# Convert to requested format: ["name", "url", "image"]
$outputList = @()
foreach ($f in $friends) {
    # Use image if available, otherwise empty string or default
    $img = if ($f.image) { $f.image } else { "" }
    $outputList += ,@($f.name, $f.url, $img)
}

$outputData = @{
    friends = $outputList
}

# Convert to JSON
# -Depth 10 ensures nested arrays are expanded
# -EscapeHandling Default ensures unicode is preserved/handled correctly (PowerShell 7)
$json = $outputData | ConvertTo-Json -Depth 10

# Ensure directory exists
$jsonDir = Split-Path $jsonPath
if (-not (Test-Path $jsonDir)) {
    New-Item -ItemType Directory -Path $jsonDir | Out-Null
}

# Write to file
[System.IO.File]::WriteAllText($jsonPath, $json, [System.Text.Encoding]::UTF8)

Write-Host "Successfully generated $jsonPath" -ForegroundColor Green