# Use Go 1.22 Alpine as the base image for building the application
FROM golang:1.22-alpine AS builder

# Install git for repository access
RUN apk add --no-cache git ca-certificates

# Define the base directory for the application as an environment variable
ENV CHAT_DIR=/openim-chat

# Set the working directory inside the container based on the environment variable
WORKDIR $CHAT_DIR

# Build arguments to invalidate cache when code changes
ARG BUILD_SHA
ARG BUILD_TIME
ENV BUILD_SHA=$BUILD_SHA
ENV BUILD_TIME=$BUILD_TIME

# Copy protocol directory
COPY protocol /protocol

# Copy go mod files first for better caching
COPY go.mod go.sum ./

# Download dependencies (this layer will be cached if go.mod/go.sum don't change)
RUN go mod download

# Copy current directory (this will invalidate cache when code changes)
COPY . .

# Use container's existing SSH configuration for private repositories
RUN go mod tidy
RUN go build -o _output/chat-api ./cmd/api/chat-api

# Using Alpine Linux for the final image
FROM alpine:latest

# Install necessary packages, such as bash
RUN apk add --no-cache bash

# Set the environment and work directory
ENV CHAT_DIR=/openim-chat
WORKDIR $CHAT_DIR


# Copy the compiled binaries and mage from the builder image to the final image
COPY --from=builder $CHAT_DIR/_output $CHAT_DIR/_output
COPY --from=builder $CHAT_DIR/config $CHAT_DIR/config

# Set the command to run when the container starts
ENTRYPOINT ["sh", "-c", "_output/chat-api"]