#!/usr/bin/env bash
set -euo pipefail

# ═══════════════════════════════════════════════════════════════════════
# ByteLyst Production Deployment - All Repos
# ═══════════════════════════════════════════════════════════════════════
# Usage: ./deploy-all.sh [--force] [--skip-health-check] [repo1 repo2 ...]
#
# Deploys all production repos or specific repos:
#   - learning_ai_invt_trdg (Trading)
#   - learning_ai_common_plat (Platform Services)
#   - learning_ai_clock (ChronoMind)
#   - learning_ai_notes (NoteLett)
#
# Options:
#   --force              Skip dirty checks and force deployment
#   --skip-health-check  Skip endpoint health verification
# ═══════════════════════════════════════════════════════════════════════

RED='\033[0;31m'; GREEN='\033[0;32m'; YELLOW='\033[1;33m'; CYAN='\033[0;36m'; NC='\033[0m'

log()  { echo -e "${CYAN}[$(date +%H:%M:%S)]${NC} $*"; }
ok()   { echo -e "${GREEN}[$(date +%H:%M:%S)] ✓${NC} $*"; }
warn() { echo -e "${YELLOW}[$(date +%H:%M:%S)] ⚠${NC} $*"; }
fail() { echo -e "${RED}[$(date +%H:%M:%S)] ✗${NC} $*"; exit 1; }

# ── Configuration ────────────────────────────────────────────────────
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
REPOS_BASE_DIR="${SCRIPT_DIR}/.."
cd "$SCRIPT_DIR"

PRODUCTION_REPOS=(
  "learning_ai_invt_trdg"
  "learning_ai_common_plat"
  "learning_ai_clock"
  "learning_ai_notes"
)

FORCE=false
SKIP_HEALTH_CHECK=false
SPECIFIC_REPOS=()

while [[ $# -gt 0 ]]; do
  case "$1" in
    --force) FORCE=true; shift ;;
    --skip-health-check) SKIP_HEALTH_CHECK=true; shift ;;
    -*) fail "Unknown option: $1" ;;
    *) SPECIFIC_REPOS+=("$1"); shift ;;
  esac
done

# If specific repos provided, validate them
if [ ${#SPECIFIC_REPOS[@]} -gt 0 ]; then
  for repo in "${SPECIFIC_REPOS[@]}"; do
    valid=false
    for valid_repo in "${PRODUCTION_REPOS[@]}"; do
      if [ "$repo" = "$valid_repo" ]; then
        valid=true
        break
      fi
    done
    if [ "$valid" = false ]; then
      fail "Unknown repo: $repo. Valid repos: ${PRODUCTION_REPOS[*]}"
    fi
  done
  REPOS_TO_DEPLOY=("${SPECIFIC_REPOS[@]}")
else
  REPOS_TO_DEPLOY=("${PRODUCTION_REPOS[@]}")
fi

# ── Deploy Function ───────────────────────────────────────────────────
deploy_repo() {
  local repo="$1"
  local repo_dir="${REPOS_BASE_DIR}/${repo}"

  log "══════════════════════════════════════════════════════════════════════"
  log "Deploying: $repo"
  log "══════════════════════════════════════════════════════════════════════"

  if [ ! -d "$repo_dir" ]; then
    fail "Repo directory not found: $repo_dir"
  fi

  cd "$repo_dir"

  # ── Dirty Check ───────────────────────────────────────────────────
  if [ "$FORCE" = false ]; then
    log "Running dirty checks for $repo..."

    if ! git diff-index --quiet HEAD --; then
      fail "Uncommitted changes in $repo. Commit or stash first, or use --force"
    fi

    if [ -n "$(git ls-files --others --exclude-standard)" ]; then
      fail "Untracked files in $repo. Commit or remove them, or use --force"
    fi

    LOCAL_COMMIT=$(git rev-parse @)
    REMOTE_COMMIT=$(git rev-parse '@{u}' 2>/dev/null || echo "")

    if [ -n "$REMOTE_COMMIT" ] && [ "$LOCAL_COMMIT" != "$REMOTE_COMMIT" ]; then
      fail "Unpushed commits in $repo. Push first or use --force"
    fi

    ok "Dirty checks passed for $repo"
  else
    warn "Skipping dirty checks for $repo (--force enabled)"
  fi

  # ── Pull and Rebase ───────────────────────────────────────────────
  log "Pulling latest changes for $repo..."
  git fetch origin

  LOCAL_MAIN=$(git rev-parse main)
  REMOTE_MAIN=$(git rev-parse origin/main)

  if [ "$LOCAL_MAIN" != "$REMOTE_MAIN" ]; then
    log "Local main is behind origin/main, rebasing $repo..."
    git rebase origin/main || {
      fail "Rebase failed for $repo. Resolve conflicts and run: git rebase --continue"
    }
    ok "Rebase completed for $repo"
  else
    ok "$repo is already up to date"
  fi

  # ── Build and Deploy ───────────────────────────────────────────────
  if [ -f "docker-compose.yml" ]; then
    log "Building and deploying $repo..."

    # Pull latest base images
    log "Pulling latest base images for $repo..."
    docker pull bytelyst-common-base-backend:latest || warn "Failed to pull backend base image for $repo, using local cache"
    docker pull bytelyst-common-base-web:latest || warn "Failed to pull web base image for $repo, using local cache"

    docker compose build || fail "Docker build failed for $repo"
    docker compose up -d || fail "Docker compose up failed for $repo"
    ok "Deployment completed for $repo"
  else
    warn "No docker-compose.yml found in $repo, skipping Docker deployment"
  fi

  cd "$REPOS_BASE_DIR"
}

# ── Deploy All Repos ───────────────────────────────────────────────────
FAILED_REPOS=()
SUCCESSFUL_REPOS=()

for repo in "${REPOS_TO_DEPLOY[@]}"; do
  if deploy_repo "$repo"; then
    SUCCESSFUL_REPOS+=("$repo")
  else
    FAILED_REPOS+=("$repo")
  fi
done

# ── Summary ─────────────────────────────────────────────────────────────
log "══════════════════════════════════════════════════════════════════════"
log "Deployment Summary"
log "══════════════════════════════════════════════════════════════════════"

if [ ${#SUCCESSFUL_REPOS[@]} -gt 0 ]; then
  ok "Successfully deployed: ${SUCCESSFUL_REPOS[*]}"
fi

if [ ${#FAILED_REPOS[@]} -gt 0 ]; then
  fail "Failed to deploy: ${FAILED_REPOS[*]}"
fi

# ── Health Checks (if not skipped) ───────────────────────────────────────
if [ "$SKIP_HEALTH_CHECK" = false ]; then
  log "Running health checks..."

  # Define health endpoints for each service
  declare -A HEALTH_ENDPOINTS=(
    ["learning_ai_invt_trdg"]="http://localhost:4025/health/live"
    ["learning_ai_common_plat"]="http://localhost:4003/health"
    ["learning_ai_clock"]="http://localhost:4011/health"
    ["learning_ai_notes"]="http://localhost:4016/health"
  )

  for repo in "${SUCCESSFUL_REPOS[@]}"; do
    endpoint="${HEALTH_ENDPOINTS[$repo]:-}"
    if [ -n "$endpoint" ]; then
      log "Checking $repo at $endpoint"
      if curl -sf "$endpoint" > /dev/null 2>&1; then
        ok "$repo is healthy"
      else
        warn "$repo health check failed (may still be starting)"
      fi
    fi
  done
else
  warn "Skipping health checks (--skip-health-check enabled)"
fi

log "══════════════════════════════════════════════════════════════════════"
ok "All deployments completed successfully!"
log "══════════════════════════════════════════════════════════════════════"