Dockerfile.backend

# ==============================================================
# OPTIM AI BRE Engine — Backend Dockerfile
# .NET 8 multi-stage production build
# ==============================================================

ARG PROJECT=OptimAI.BRE.Gateway

# ---- STAGE 1: RESTORE ----------------------------------------
FROM mcr.microsoft.com/dotnet/sdk:8.0 AS restore
ARG PROJECT
WORKDIR /src

COPY ["OptimAI.BRE.Shared/OptimAI.BRE.Shared.csproj",           "OptimAI.BRE.Shared/"]
COPY ["OptimAI.BRE.RuleEngine/OptimAI.BRE.RuleEngine.csproj",   "OptimAI.BRE.RuleEngine/"]
COPY ["OptimAI.BRE.RuleDesigner/OptimAI.BRE.RuleDesigner.csproj","OptimAI.BRE.RuleDesigner/"]
COPY ["OptimAI.BRE.AIEngine/OptimAI.BRE.AIEngine.csproj",       "OptimAI.BRE.AIEngine/"]
COPY ["OptimAI.BRE.ClientMgmt/OptimAI.BRE.ClientMgmt.csproj",   "OptimAI.BRE.ClientMgmt/"]
COPY ["OptimAI.BRE.AuditService/OptimAI.BRE.AuditService.csproj","OptimAI.BRE.AuditService/"]
COPY ["OptimAI.BRE.ReportService/OptimAI.BRE.ReportService.csproj","OptimAI.BRE.ReportService/"]
COPY ["OptimAI.BRE.IdentityService/OptimAI.BRE.IdentityService.csproj","OptimAI.BRE.IdentityService/"]
COPY ["OptimAI.BRE.Gateway/OptimAI.BRE.Gateway.csproj",         "OptimAI.BRE.Gateway/"]
COPY ["OptimAI.BRE.sln", "./"]

RUN dotnet restore "OptimAI.BRE.Gateway/OptimAI.BRE.Gateway.csproj" \
    --runtime linux-x64

# ---- STAGE 2: BUILD ------------------------------------------
FROM restore AS build
ARG PROJECT
COPY . .

RUN dotnet build "${PROJECT}/${PROJECT}.csproj" \
    -c Release \
    --no-restore \
    --runtime linux-x64 \
    --self-contained false \
    -o /app/build

# ---- STAGE 3: PUBLISH ----------------------------------------
FROM build AS publish
ARG PROJECT

RUN dotnet publish "${PROJECT}/${PROJECT}.csproj" \
    -c Release \
    --no-restore \
    --runtime linux-x64 \
    --self-contained false \
    /p:UseAppHost=false \
    -o /app/publish

# ---- STAGE 4: RUNTIME ----------------------------------------
FROM mcr.microsoft.com/dotnet/aspnet:8.0-alpine AS runtime

# Install curl + tz data (for healthcheck and IST timezone)
RUN apk add --no-cache curl tzdata && \
    cp /usr/share/zoneinfo/Asia/Kolkata /etc/localtime && \
    echo "Asia/Kolkata" > /etc/timezone && \
    apk del tzdata

# Non-root security
RUN addgroup -S appgroup && adduser -S appuser -G appgroup

WORKDIR /app

COPY --from=publish --chown=appuser:appgroup /app/publish .

# Persistent log directory
RUN mkdir -p /app/logs /app/reports && \
    chown -R appuser:appgroup /app/logs /app/reports

USER appuser

ENV ASPNETCORE_URLS=http://+:8080 \
    ASPNETCORE_ENVIRONMENT=Production \
    DOTNET_RUNNING_IN_CONTAINER=true \
    DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=false \
    TZ=Asia/Kolkata

EXPOSE 8080

HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=5 \
    CMD curl -f http://localhost:8080/health || exit 1

ENTRYPOINT ["dotnet", "OptimAI.BRE.Gateway.dll"]