#!/bin/bash
# ============================================================================
# Git Hook: post-receive
# ============================================================================
# Este hook executa automaticamente apos cada git push.
# Ele faz build e deploy do site sem intervencao manual.
#
# Instalacao:
#   cp ci/hooks/post-receive /var/git/site.git/hooks/
#   chmod +x /var/git/site.git/hooks/post-receive
# ============================================================================

set -e

# Cores
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
RED='\033[0;31m'
BLUE='\033[0;34m'
NC='\033[0m'

# Configuracoes
REPO_DIR="$(pwd)"
DEPLOY_DIR="/var/tmp/site-deploy-$(date +%s)"
CI_DIR="/var/ci"
LOG_FILE="/var/ci/logs/deploy-$(date +%Y%m%d-%H%M%S).log"
LAST_LOG="/var/ci/logs/last-deploy.log"
CONFIG_FILE="/var/ci/config.env"

# Criar pasta de logs
mkdir -p "$(dirname "$LOG_FILE")"

# Funcao de log
log() {
    echo -e "$1" | tee -a "$LOG_FILE"
}

# Redirect output to log
exec > >(tee -a "$LOG_FILE")
exec 2>&1

log "${BLUE}============================================================${NC}"
log "${BLUE}  Avanzato CI/CD - Deploy Automatico${NC}"
log "${BLUE}============================================================${NC}"
log ""
log "Data: $(date)"
log "Branch recebida: $1"
log "Commit: $2"
log ""

# Carregar configuracoes
if [ -f "$CONFIG_FILE" ]; then
    source "$CONFIG_FILE"
    log "${GREEN}[OK]${NC} Configuracoes carregadas."
else
    log "${YELLOW}[AVISO]${NC} Arquivo config.env nao encontrado. Usando defaults."
    DEPLOY_PATH="/var/www/avanzato"
    STAGING_PATH="/var/www/avanzato-staging"
    BACKUP_PATH="/var/ci/backups"
fi

# Detectar branch
while read oldrev newrev refname; do
    BRANCH=$(git rev-parse --symbolic --abbrev-ref "$refname")
    log "Processando branch: ${YELLOW}${BRANCH}${NC}"
    
    case "$BRANCH" in
        main|master)
            TARGET="production"
            DEPLOY_TARGET="$DEPLOY_PATH"
            ;;
        staging)
            TARGET="staging"
            DEPLOY_TARGET="$STAGING_PATH"
            ;;
        *)
            log "${YELLOW}[IGNORADO]${NC} Branch '${BRANCH}' nao configurada para deploy."
            log "Branches validas: main, master, staging"
            exit 0
            ;;
    esac
done

log ""
log "${BLUE}------------------------------------------------------------${NC}"
log "Ambiente: ${YELLOW}${TARGET}${NC}"
log "Destino: ${DEPLOY_TARGET}"
log "${BLUE}------------------------------------------------------------${NC}"
log ""

# ==========================================================================
# PASSO 1: Checkout do codigo
# ==========================================================================
log "${BLUE}[1/6]${NC} Checkout do codigo..."
mkdir -p "$DEPLOY_DIR"
git --git-dir="$REPO_DIR" --work-tree="$DEPLOY_DIR" checkout -f "$BRANCH" 2>&1
log "${GREEN}[OK]${NC} Codigo extraido para ${DEPLOY_DIR}"
log ""

# ==========================================================================
# PASSO 2: Instalar dependencias
# ==========================================================================
log "${BLUE}[2/6]${NC} Instalando dependencias..."
cd "$DEPLOY_DIR"
if [ -f "package.json" ]; then
    npm ci --silent 2>&1 || {
        log "${RED}[ERRO]${NC} Falha ao instalar dependencias."
        exit 1
    }
    log "${GREEN}[OK]${NC} Dependencias instaladas."
else
    log "${YELLOW}[AVISO]${NC} package.json nao encontrado. Pulando."
fi
log ""

# ==========================================================================
# PASSO 3: Build
# ==========================================================================
log "${BLUE}[3/6]${NC} Executando build..."
cd "$DEPLOY_DIR"
if [ -f "package.json" ]; then
    npm run build 2>&1 || {
        log "${RED}[ERRO]${NC} Falha no build."
        exit 1
    }
    
    # Verificar se a pasta dist foi criada
    if [ ! -d "dist" ]; then
        log "${RED}[ERRO]${NC} Pasta dist/ nao encontrada apos build."
        exit 1
    fi
    
    log "${GREEN}[OK]${NC} Build concluido com sucesso."
    log "Tamanho: $(du -sh dist/ | cut -f1)"
else
    # Se nao tem package.json, usar o proprio diretorio
    log "${YELLOW}[AVISO]${NC} Projeto estatico detectado. Usando arquivos diretamente."
fi
log ""

# ==========================================================================
# PASSO 4: Preservar assets
# ==========================================================================
log "${BLUE}[4/6]${NC} Preservando assets customizados..."
cd "$DEPLOY_DIR"

# Se existir pasta custom-assets, preservar
if [ -d "custom-assets" ]; then
    log "Assets customizados encontrados. Preservando..."
    bash "${DEPLOY_DIR}/scripts/preserve-assets.sh" "${DEPLOY_DIR}/dist" 2>&1 || {
        log "${YELLOW}[AVISO]${NC} Erro ao preservar assets (nao critico)."
    }
else
    log "${YELLOW}[AVISO]${NC} Nenhum asset customizado encontrado."
fi

# Se existem assets preservados no /var/ci/assets, copiar
if [ -d "/var/ci/assets" ] && [ "$(ls -A /var/ci/assets)" ]; then
    log "Copiando assets preservados..."
    cp -r /var/ci/assets/* "${DEPLOY_DIR}/dist/" 2>/dev/null || true
fi

log "${GREEN}[OK]${NC} Assets processados."
log ""

# ==========================================================================
# PASSO 5: Backup do site atual
# ==========================================================================
log "${BLUE}[5/6]${NC} Criando backup..."
if [ -d "$DEPLOY_TARGET" ] && [ "$(ls -A "$DEPLOY_TARGET" 2>/dev/null)" ]; then
    BACKUP_NAME="backup-$(date +%Y%m%d-%H%M%S)"
    mkdir -p "$BACKUP_PATH"
    
    # Criar backup (excluindo backups antigos para nao duplicar)
    tar -czf "${BACKUP_PATH}/${BACKUP_NAME}.tar.gz" \
        -C "$(dirname "$DEPLOY_TARGET")" \
        --exclude="backups" \
        "$(basename "$DEPLOY_TARGET")" 2>/dev/null || true
    
    # Limpar backups antigos (manter 10)
    ls -t "${BACKUP_PATH}"/*.tar.gz 2>/dev/null | tail -n +11 | xargs -r rm -f
    
    log "${GREEN}[OK]${NC} Backup criado: ${BACKUP_NAME}.tar.gz"
else
    log "${YELLOW}[AVISO]${NC} Nada para fazer backup (primeiro deploy)."
fi
log ""

# ==========================================================================
# PASSO 6: Deploy
# ==========================================================================
log "${BLUE}[6/6]${NC} Fazendo deploy..."

# Criar diretorio se nao existir
mkdir -p "$DEPLOY_TARGET"

# Limpar conteudo antigo (exceto backups)
find "$DEPLOY_TARGET" -mindepth 1 -not -path "${DEPLOY_TARGET}/backups/*" -not -name "backups" -delete 2>/dev/null || rm -rf "${DEPLOY_TARGET:?}"/*

# Copiar novos arquivos
if [ -d "${DEPLOY_DIR}/dist" ]; then
    cp -r "${DEPLOY_DIR}/dist/"* "$DEPLOY_TARGET/"
else
    # Se nao tem dist, copiar tudo
    cp -r "${DEPLOY_DIR}/"* "$DEPLOY_TARGET/"
fi

# Permissoes
chown -R www-data:www-data "$DEPLOY_TARGET"
chmod -R 755 "$DEPLOY_TARGET"

# Limpar pasta temporaria
rm -rf "$DEPLOY_DIR"

log "${GREEN}[OK]${NC} Deploy concluido!"
log ""

# ==========================================================================
# FINAL
# ==========================================================================
log "${BLUE}============================================================${NC}"
log "${GREEN}  Deploy concluido com sucesso!${NC}"
log "${BLUE}============================================================${NC}"
log ""
log "Ambiente: ${TARGET}"
log "Caminho: ${DEPLOY_TARGET}"
log "Backup: ${BACKUP_PATH}"
log "Log: ${LOG_FILE}"
log "Data: $(date)"
log ""

# Atualizar link do ultimo log
ln -sf "$LOG_FILE" "$LAST_LOG"

# Notificar via webhook (opcional)
# curl -X POST "https://hooks.slack.com/services/..." \
#   -H 'Content-Type: application/json' \
#   -d "{\"text\":\"Deploy ${TARGET} concluido!\"}" 2>/dev/null || true

exit 0