# syntax=docker/dockerfile:1
FROM mirror.gcr.io/library/golang:1.24-alpine AS builder

RUN apk add --no-cache git ca-certificates tzdata
WORKDIR /build

# 1. Copia arquivos de dependência primeiro
COPY go.mod go.sum ./

# 2. Usa o cache (Isso só funciona porque você ativou buildkit: true no yml)
RUN --mount=type=cache,target=/go/pkg/mod \
    go mod download && go mod verify

# 3. Copia o código fonte
COPY . .

# 4. Build com cache de compilação
RUN --mount=type=cache,target=/go/pkg/mod \
    --mount=type=cache,target=/root/.cache/go-build \
    CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build \
    -ldflags="-s -w -X main.Version=$(git describe --tags --always 2>/dev/null || echo 'dev')" \
    -trimpath \
    -o /app/main ./cmd/api

# --- Estágio Final (SCRATCH) ---
FROM scratch AS runner
COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
COPY --from=builder /app/main /main
COPY --from=builder /build/migrations /migrations

ENV PORT=8521 \
    TZ=America/Sao_Paulo \
    GODEBUG=netdns=go \
    GOGC=50

EXPOSE 8521
ENTRYPOINT ["/main"]