# Unlike ha-gateway/ai-gateway/discord-bot, tts-gateway needs `ffmpeg` and the
# `open_jtalk` CLI (+ dictionary + voice) present at runtime, which rules out
# a distroless base - hence the Ubuntu runtime stage below instead. Model
# artifact distribution for the inference sidecar (tts-gateway/sidecar/) is
# still an open decision (TTS_GATEWAY_PLAN.md Phase 5); this image is only the
# Go gateway, which has no model weights to worry about.
FROM golang:1.26-bookworm AS builder
WORKDIR /workspace

COPY go.work go.work.sum ./

# Manifests only, copied first, so `go mod download` gets its own cache layer
# invalidated only by dependency changes - not by every source edit below.
COPY gen/go.mod gen/go.sum ./gen/
COPY ai-gateway/go.mod ai-gateway/go.sum ./ai-gateway/
COPY ha-gateway/go.mod ha-gateway/go.sum ./ha-gateway/
COPY discord-bot/go.mod discord-bot/go.sum ./discord-bot/
COPY alexa-bridge/go.mod alexa-bridge/go.sum ./alexa-bridge/
COPY alert-bridge/go.mod alert-bridge/go.sum ./alert-bridge/
COPY tts-gateway/go.mod tts-gateway/go.sum ./tts-gateway/

WORKDIR /workspace/tts-gateway
RUN go mod download

WORKDIR /workspace
COPY gen/ ./gen/
COPY ai-gateway/ ./ai-gateway/
COPY ha-gateway/ ./ha-gateway/
COPY discord-bot/ ./discord-bot/
COPY alexa-bridge/ ./alexa-bridge/
COPY alert-bridge/ ./alert-bridge/
COPY tts-gateway/ ./tts-gateway/

WORKDIR /workspace/tts-gateway
RUN CGO_ENABLED=0 GOOS=linux go build -o /tts-gateway ./cmd/gateway

FROM ubuntu:22.04
RUN apt-get update && apt-get install -y --no-install-recommends \
    ffmpeg \
    open-jtalk \
    open-jtalk-mecab-naist-jdic \
    hts-voice-nitech-jp-atr503-m001 \
    ca-certificates \
    && rm -rf /var/lib/apt/lists/*

COPY --from=builder /tts-gateway /tts-gateway
EXPOSE 50053
ENTRYPOINT ["/tts-gateway"]