-- Contexta DB Migration
-- Run this in your Supabase SQL Editor

-- ── chatbots: new columns ─────────────────────────────────────────────────────
ALTER TABLE chatbots ADD COLUMN IF NOT EXISTS logo_url TEXT;
ALTER TABLE chatbots ADD COLUMN IF NOT EXISTS show_branding BOOLEAN DEFAULT TRUE;
ALTER TABLE chatbots ADD COLUMN IF NOT EXISTS lead_capture_enabled BOOLEAN DEFAULT FALSE;
ALTER TABLE chatbots ADD COLUMN IF NOT EXISTS lead_capture_fields JSONB DEFAULT '["email"]';
ALTER TABLE chatbots ADD COLUMN IF NOT EXISTS lead_capture_trigger VARCHAR(50) DEFAULT 'after_first_message';
ALTER TABLE chatbots ADD COLUMN IF NOT EXISTS handoff_enabled BOOLEAN DEFAULT FALSE;
ALTER TABLE chatbots ADD COLUMN IF NOT EXISTS handoff_message TEXT DEFAULT 'I''ll connect you with our team. Please wait.';
ALTER TABLE chatbots ADD COLUMN IF NOT EXISTS handoff_email TEXT;
ALTER TABLE chatbots ADD COLUMN IF NOT EXISTS handoff_keywords JSONB DEFAULT '["human", "agent", "speak to someone", "talk to a person", "real person"]';

-- ── messages: new columns ─────────────────────────────────────────────────────
ALTER TABLE messages ADD COLUMN IF NOT EXISTS confidence_score DECIMAL(4,3) DEFAULT NULL;
ALTER TABLE messages ADD COLUMN IF NOT EXISTS is_handoff BOOLEAN DEFAULT FALSE;

-- ── leads table ───────────────────────────────────────────────────────────────
CREATE TABLE IF NOT EXISTS leads (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    chatbot_id UUID REFERENCES chatbots(id) ON DELETE CASCADE,
    conversation_id UUID REFERENCES conversations(id) ON DELETE SET NULL,
    email VARCHAR(255),
    name VARCHAR(255),
    phone VARCHAR(50),
    company VARCHAR(255),
    created_at TIMESTAMPTZ DEFAULT NOW()
);
CREATE INDEX IF NOT EXISTS idx_leads_chatbot ON leads(chatbot_id);
CREATE INDEX IF NOT EXISTS idx_leads_created ON leads(created_at DESC);
ALTER TABLE leads ENABLE ROW LEVEL SECURITY;
CREATE POLICY "leads_owner" ON leads FOR ALL USING (
    chatbot_id IN (
        SELECT c.id FROM chatbots c
        JOIN companies co ON c.company_id = co.id
        WHERE co.owner_id = auth.uid()
    )
);

-- ── url_sources table ─────────────────────────────────────────────────────────
CREATE TABLE IF NOT EXISTS url_sources (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    chatbot_id UUID REFERENCES chatbots(id) ON DELETE CASCADE,
    url TEXT NOT NULL,
    status VARCHAR(50) DEFAULT 'pending',
    page_title TEXT,
    chunk_count INT DEFAULT 0,
    error_message TEXT,
    created_at TIMESTAMPTZ DEFAULT NOW()
);
CREATE INDEX IF NOT EXISTS idx_url_sources_chatbot ON url_sources(chatbot_id);
ALTER TABLE url_sources ENABLE ROW LEVEL SECURITY;
CREATE POLICY "url_sources_owner" ON url_sources FOR ALL USING (
    chatbot_id IN (
        SELECT c.id FROM chatbots c
        JOIN companies co ON c.company_id = co.id
        WHERE co.owner_id = auth.uid()
    )
);

-- ── message_feedback table ────────────────────────────────────────────────────
CREATE TABLE IF NOT EXISTS message_feedback (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    message_id UUID REFERENCES messages(id) ON DELETE CASCADE,
    chatbot_id UUID REFERENCES chatbots(id) ON DELETE CASCADE,
    feedback VARCHAR(20) NOT NULL CHECK (feedback IN ('positive', 'negative')),
    created_at TIMESTAMPTZ DEFAULT NOW()
);
CREATE INDEX IF NOT EXISTS idx_feedback_chatbot ON message_feedback(chatbot_id);
ALTER TABLE message_feedback ENABLE ROW LEVEL SECURITY;
CREATE POLICY "feedback_insert" ON message_feedback FOR INSERT WITH CHECK (true);
CREATE POLICY "feedback_select_owner" ON message_feedback FOR SELECT USING (
    chatbot_id IN (
        SELECT c.id FROM chatbots c
        JOIN companies co ON c.company_id = co.id
        WHERE co.owner_id = auth.uid()
    )
);

-- ── Supabase Storage ──────────────────────────────────────────────────────────
-- Create the 'logos' bucket manually in the Supabase dashboard:
--   Storage → New bucket → Name: logos → Public: ON

-- ── channel_connections table ─────────────────────────────────────────────────
CREATE TABLE IF NOT EXISTS channel_connections (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    chatbot_id UUID NOT NULL REFERENCES chatbots(id) ON DELETE CASCADE,
    channel VARCHAR(20) NOT NULL CHECK (channel IN ('telegram', 'whatsapp')),
    bot_token TEXT,
    bot_username TEXT,
    wa_keyword VARCHAR(50),
    is_active BOOLEAN DEFAULT TRUE,
    created_at TIMESTAMPTZ DEFAULT NOW(),
    UNIQUE(chatbot_id, channel)
);
CREATE INDEX IF NOT EXISTS idx_channel_connections_chatbot ON channel_connections(chatbot_id);
CREATE INDEX IF NOT EXISTS idx_channel_connections_wa_keyword ON channel_connections(wa_keyword) WHERE channel = 'whatsapp';
ALTER TABLE channel_connections ENABLE ROW LEVEL SECURITY;
CREATE POLICY "channel_connections_owner" ON channel_connections FOR ALL USING (
    chatbot_id IN (
        SELECT c.id FROM chatbots c
        JOIN companies co ON c.company_id = co.id
        WHERE co.owner_id = auth.uid()
    )
);

-- ── channel_sessions table ────────────────────────────────────────────────────
CREATE TABLE IF NOT EXISTS channel_sessions (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    chatbot_id UUID NOT NULL REFERENCES chatbots(id) ON DELETE CASCADE,
    channel VARCHAR(20) NOT NULL,
    external_id TEXT NOT NULL,
    session_id TEXT NOT NULL,
    last_active TIMESTAMPTZ DEFAULT NOW(),
    created_at TIMESTAMPTZ DEFAULT NOW(),
    UNIQUE(channel, external_id)
);
CREATE INDEX IF NOT EXISTS idx_channel_sessions_lookup ON channel_sessions(channel, external_id);