-- Extension 5: Professional CRM
-- Contacts, interaction logs, and opportunities (single-user, no RLS)

CREATE TABLE IF NOT EXISTS professional_contacts (
    id            UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    name          TEXT NOT NULL,
    company       TEXT,
    title         TEXT,
    email         TEXT,
    phone         TEXT,
    linkedin_url  TEXT,
    how_we_met    TEXT,
    tags          TEXT[] NOT NULL DEFAULT '{}',
    notes         TEXT,
    last_contacted TIMESTAMPTZ,
    follow_up_date DATE,
    created_at    TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at    TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE TABLE IF NOT EXISTS contact_interactions (
    id               UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    contact_id       UUID NOT NULL REFERENCES professional_contacts(id) ON DELETE CASCADE,
    interaction_type TEXT NOT NULL CHECK (interaction_type IN ('meeting', 'email', 'call', 'coffee', 'event', 'linkedin', 'other')),
    occurred_at      TIMESTAMPTZ NOT NULL DEFAULT now(),
    summary          TEXT NOT NULL,
    follow_up_needed BOOLEAN NOT NULL DEFAULT false,
    follow_up_notes  TEXT,
    created_at       TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE TABLE IF NOT EXISTS opportunities (
    id                  UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    contact_id          UUID REFERENCES professional_contacts(id) ON DELETE SET NULL,
    title               TEXT NOT NULL,
    description         TEXT,
    stage               TEXT NOT NULL DEFAULT 'identified' CHECK (stage IN ('identified', 'in_conversation', 'proposal', 'negotiation', 'won', 'lost')),
    value               DECIMAL(12, 2),
    expected_close_date DATE,
    notes               TEXT,
    created_at          TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at          TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE INDEX IF NOT EXISTS idx_contacts_last_contacted ON professional_contacts(last_contacted);
CREATE INDEX IF NOT EXISTS idx_contacts_follow_up      ON professional_contacts(follow_up_date) WHERE follow_up_date IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_interactions_contact    ON contact_interactions(contact_id, occurred_at DESC);
CREATE INDEX IF NOT EXISTS idx_opportunities_stage     ON opportunities(stage);

DROP TRIGGER IF EXISTS update_professional_contacts_updated_at ON professional_contacts;
CREATE TRIGGER update_professional_contacts_updated_at
    BEFORE UPDATE ON professional_contacts
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

DROP TRIGGER IF EXISTS update_opportunities_updated_at ON opportunities;
CREATE TRIGGER update_opportunities_updated_at
    BEFORE UPDATE ON opportunities
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

CREATE OR REPLACE FUNCTION update_last_contacted()
RETURNS TRIGGER AS $$
BEGIN
    UPDATE professional_contacts SET last_contacted = NEW.occurred_at WHERE id = NEW.contact_id;
    RETURN NEW;
END;
$$ LANGUAGE plpgsql;

DROP TRIGGER IF EXISTS update_contact_last_contacted ON contact_interactions;
CREATE TRIGGER update_contact_last_contacted
    AFTER INSERT ON contact_interactions
    FOR EACH ROW EXECUTE FUNCTION update_last_contacted();