# Task 1: Create Project Structure

## Task Description

**Files:**
- Create: `src/Fengling.AuthService/Fengling.AuthService.csproj`
- Create: `src/Fengling.AuthService/Program.cs`
- Create: `src/Fengling.AuthService/appsettings.json`

## Implementation Steps

### Step 1: Create project file

Run:
```bash
cd /Users/movingsam/Fengling.Refactory.Buiding/src
dotnet new webapi -n Fengling.AuthService -o Fengling.AuthService
```

### Step 2: Update project file with dependencies

Edit: `src/Fengling.AuthService/Fengling.AuthService.csproj`

```xml
<Project Sdk="Microsoft.NET.Sdk.Web">
  <PropertyGroup>
    <TargetFramework>net10.0</TargetFramework>
    <Nullable>enable</Nullable>
    <ImplicitUsings>enable</ImplicitUsings>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="OpenIddict.AspNetCore" Version="7.2.0" />
    <PackageReference Include="OpenIddict.EntityFrameworkCore" Version="7.2.0" />
    <PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="10.0.2" />
    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="10.0.0" />
    <PackageReference Include="Serilog.AspNetCore" Version="9.0.0" />
    <PackageReference Include="Serilog.Sinks.Console" Version="6.0.0" />
    <PackageReference Include="OpenTelemetry" Version="1.11.0" />
    <PackageReference Include="OpenTelemetry.Extensions.Hosting" Version="1.11.0" />
    <PackageReference Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.11.0" />
    <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.11.0" />
  </ItemGroup>
</Project>
```

### Step 3: Create appsettings.json

Create: `src/Fengling.AuthService/appsettings.json`

```json
{
  "ConnectionStrings": {
    "DefaultConnection": "Host=192.168.100.10;Port=5432;Database=fengling_auth;Username=movingsam;Password=sl52788542"
  },
  "OpenIddict": {
    "Issuer": "https://auth.fengling.local",
    "Audience": "fengling-api"
  },
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  },
  "AllowedHosts": "*"
}
```

### Step 4: Commit

```bash
git add src/Fengling.AuthService/
git commit -m "feat(auth): create authentication service project structure"
```

## Context

This is the first task of implementing the Fengling Authentication Service. We're building a standalone authentication service using OpenIddict for JWT token issuance and multi-tenant support. This task establishes the basic ASP.NET Core Web API project structure with all necessary dependencies including OpenIddict, EF Core, PostgreSQL, Serilog, and OpenTelemetry.

**Architecture**: ASP.NET Core Web API with OpenIddict for OAuth2/OIDC, PostgreSQL for user data.

**Tech Stack**: .NET 10.0, OpenIddict 7.2.0, EF Core 10.0.2, PostgreSQL, Serilog 9.0.0, OpenTelemetry 1.11.0.

**Working Directory**: `/Users/movingsam/Fengling.Refactory.Buiding/src`

## Verification

- [ ] Project file created successfully
- [ ] Target framework set to net10.0
- [ ] All NuGet packages added (latest versions)
- [ ] appsettings.json configured with connection string and OpenIddict settings
- [ ] Project builds successfully
- [ ] Committed to git

## Notes

- OpenIddict packages updated to 7.2.0 (latest)
- All dependencies updated to latest versions
- Used .NET 10.0 as target framework