-- Contact discovery from mail messages: pseudo-contacts, signatures, enrichment suggestions.

CREATE TABLE contact_discovery_scans (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    status TEXT NOT NULL DEFAULT 'pending',
    messages_scanned INT NOT NULL DEFAULT 0,
    profiles_found INT NOT NULL DEFAULT 0,
    error_message TEXT,
    started_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    completed_at TIMESTAMPTZ
);

CREATE INDEX idx_contact_discovery_scans_user ON contact_discovery_scans(user_id, started_at DESC);

CREATE TABLE contact_discovered_profiles (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    scan_id UUID REFERENCES contact_discovery_scans(id) ON DELETE SET NULL,
    person_group_id UUID,
    display_name TEXT NOT NULL DEFAULT '',
    primary_email TEXT NOT NULL,
    all_emails JSONB NOT NULL DEFAULT '[]',
    message_count INT NOT NULL DEFAULT 0,
    sent_count INT NOT NULL DEFAULT 0,
    received_count INT NOT NULL DEFAULT 0,
    spam_count INT NOT NULL DEFAULT 0,
    forwarded_count INT NOT NULL DEFAULT 0,
    is_mailing_list BOOLEAN NOT NULL DEFAULT false,
    is_disposable BOOLEAN NOT NULL DEFAULT false,
    is_spam_heavy BOOLEAN NOT NULL DEFAULT false,
    classification_reason TEXT,
    linked_contact_uid TEXT,
    enrichment_status TEXT NOT NULL DEFAULT 'pending',
    enriched_data JSONB,
    enriched_at TIMESTAMPTZ,
    status TEXT NOT NULL DEFAULT 'suggested',
    rejected_at TIMESTAMPTZ,
    accepted_at TIMESTAMPTZ,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    last_message_at TIMESTAMPTZ,
    UNIQUE(user_id, primary_email)
);

CREATE INDEX idx_contact_discovered_profiles_user_status ON contact_discovered_profiles(user_id, status);
CREATE INDEX idx_contact_discovered_profiles_user_email ON contact_discovered_profiles(user_id, lower(primary_email));

CREATE TABLE contact_discovered_signatures (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    profile_id UUID NOT NULL REFERENCES contact_discovered_profiles(id) ON DELETE CASCADE,
    message_id UUID REFERENCES messages(id) ON DELETE SET NULL,
    signature_text TEXT NOT NULL DEFAULT '',
    signature_html TEXT,
    message_date TIMESTAMPTZ NOT NULL,
    confidence REAL NOT NULL DEFAULT 0.5,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX idx_contact_discovered_signatures_profile ON contact_discovered_signatures(profile_id, message_date DESC);

CREATE TABLE contact_enrichment_suggestions (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    profile_id UUID REFERENCES contact_discovered_profiles(id) ON DELETE CASCADE,
    target_contact_uid TEXT,
    suggestion_type TEXT NOT NULL,
    field_path TEXT NOT NULL,
    suggested_value TEXT NOT NULL,
    suggested_label TEXT NOT NULL DEFAULT '',
    confidence REAL NOT NULL DEFAULT 0.5,
    source_signature_id UUID REFERENCES contact_discovered_signatures(id) ON DELETE SET NULL,
    status TEXT NOT NULL DEFAULT 'pending',
    rejected_at TIMESTAMPTZ,
    accepted_at TIMESTAMPTZ,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    UNIQUE(user_id, profile_id, field_path, suggested_value)
);

CREATE INDEX idx_contact_enrichment_suggestions_user ON contact_enrichment_suggestions(user_id, status);

CREATE TABLE contact_discovery_rejections (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    rejection_key TEXT NOT NULL,
    rejection_type TEXT NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    UNIQUE(user_id, rejection_key, rejection_type)
);

CREATE INDEX idx_contact_discovery_rejections_user ON contact_discovery_rejections(user_id);