-- +goose Up
-- Email campaign drafts + generated versions (Marketing suite P0).
-- Provider / unsubscribe / send log tables live in 012_integrations_email.sql.

CREATE TABLE email_campaigns (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  company_id UUID NOT NULL REFERENCES companies(id) ON DELETE CASCADE,
  name TEXT NOT NULL,
  template_key TEXT NOT NULL DEFAULT 'custom'
    CHECK (template_key IN ('christmas', 'black_friday', 'spring', 'custom')),
  status TEXT NOT NULL DEFAULT 'draft'
    CHECK (status IN ('draft', 'ready', 'scheduled', 'sent', 'cancelled')),
  category_ids UUID[] NOT NULL DEFAULT '{}',
  product_ids UUID[] NOT NULL DEFAULT '{}',
  prompt TEXT NOT NULL DEFAULT '',
  use_default_prompt BOOLEAN NOT NULL DEFAULT true,
  audience_filter JSONB NOT NULL DEFAULT '{}'::jsonb,
  scheduled_at TIMESTAMPTZ,
  sent_at TIMESTAMPTZ,
  created_by UUID REFERENCES users(id) ON DELETE SET NULL,
  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE INDEX email_campaigns_company_id_idx ON email_campaigns (company_id);
CREATE INDEX email_campaigns_company_status_idx ON email_campaigns (company_id, status);

CREATE TABLE email_campaign_versions (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  campaign_id UUID NOT NULL REFERENCES email_campaigns(id) ON DELETE CASCADE,
  company_id UUID NOT NULL REFERENCES companies(id) ON DELETE CASCADE,
  version INT NOT NULL DEFAULT 1,
  subject TEXT NOT NULL DEFAULT '',
  html_body TEXT NOT NULL DEFAULT '',
  plain_body TEXT NOT NULL DEFAULT '',
  generation_mode TEXT NOT NULL DEFAULT 'template'
    CHECK (generation_mode IN ('template', 'ai')),
  generated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
  UNIQUE (campaign_id, version)
);

CREATE INDEX email_campaign_versions_campaign_idx ON email_campaign_versions (campaign_id, version DESC);

-- +goose Down
DROP TABLE IF EXISTS email_campaign_versions;
DROP TABLE IF EXISTS email_campaigns;