-- Migration: Système de campagnes email
-- Date: 2025-11-14
-- Description: Tables pour gérer les campagnes d'emailing

-- Table des campagnes email
CREATE TABLE IF NOT EXISTS email_campaigns (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  name VARCHAR(255) NOT NULL,
  subject VARCHAR(500) NOT NULL,
  template_html TEXT NOT NULL,
  template_text TEXT,
  created_by UUID NOT NULL REFERENCES users(id),
  status VARCHAR(50) DEFAULT 'DRAFT',  -- DRAFT, SCHEDULED, SENT, CANCELLED
  scheduled_at TIMESTAMP,
  sent_at TIMESTAMP,
  recipient_count INTEGER DEFAULT 0,
  opened_count INTEGER DEFAULT 0,
  clicked_count INTEGER DEFAULT 0,
  criteria JSONB,  -- Critères de ciblage
  notes TEXT,
  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- Table des destinataires (pour tracking individuel)
CREATE TABLE IF NOT EXISTS email_campaign_recipients (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  campaign_id UUID NOT NULL REFERENCES email_campaigns(id) ON DELETE CASCADE,
  user_id UUID NOT NULL REFERENCES users(id),
  email VARCHAR(255) NOT NULL,
  status VARCHAR(50) DEFAULT 'PENDING',  -- PENDING, SENT, FAILED, BOUNCED
  sent_at TIMESTAMP,
  opened_at TIMESTAMP,
  clicked_at TIMESTAMP,
  unsubscribed_at TIMESTAMP,
  error_message TEXT,
  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- Table des templates prédéfinis
CREATE TABLE IF NOT EXISTS email_templates (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  name VARCHAR(255) NOT NULL,
  description TEXT,
  subject VARCHAR(500),
  html_content TEXT NOT NULL,
  text_content TEXT,
  category VARCHAR(100),  -- welcome, promotion, notification, etc.
  is_active BOOLEAN DEFAULT TRUE,
  created_by UUID REFERENCES users(id),
  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- Index pour performance
CREATE INDEX IF NOT EXISTS idx_email_campaigns_status ON email_campaigns(status);
CREATE INDEX IF NOT EXISTS idx_email_campaigns_created_by ON email_campaigns(created_by);
CREATE INDEX IF NOT EXISTS idx_email_campaigns_scheduled_at ON email_campaigns(scheduled_at);

CREATE INDEX IF NOT EXISTS idx_email_campaign_recipients_campaign ON email_campaign_recipients(campaign_id);
CREATE INDEX IF NOT EXISTS idx_email_campaign_recipients_user ON email_campaign_recipients(user_id);
CREATE INDEX IF NOT EXISTS idx_email_campaign_recipients_status ON email_campaign_recipients(status);

CREATE INDEX IF NOT EXISTS idx_email_templates_category ON email_templates(category);
CREATE INDEX IF NOT EXISTS idx_email_templates_is_active ON email_templates(is_active);

-- Commentaires
COMMENT ON TABLE email_campaigns IS 'Campagnes email marketing';
COMMENT ON TABLE email_campaign_recipients IS 'Destinataires individuels avec tracking';
COMMENT ON TABLE email_templates IS 'Templates email reutilisables';

COMMENT ON COLUMN email_campaigns.criteria IS 'Criteres JSON de ciblage des destinataires';
COMMENT ON COLUMN email_campaigns.status IS 'DRAFT=Brouillon, SCHEDULED=Planifie, SENT=Envoye, CANCELLED=Annule';