-- 000010_notification_preferences.up.sql
-- User notification preferences for granular control

CREATE TABLE IF NOT EXISTS notification_preferences (
    user_id UUID PRIMARY KEY REFERENCES profiles(id) ON DELETE CASCADE,
    
    -- Push notification toggles
    push_enabled BOOLEAN NOT NULL DEFAULT TRUE,
    push_likes BOOLEAN NOT NULL DEFAULT TRUE,
    push_comments BOOLEAN NOT NULL DEFAULT TRUE,
    push_replies BOOLEAN NOT NULL DEFAULT TRUE,
    push_mentions BOOLEAN NOT NULL DEFAULT TRUE,
    push_follows BOOLEAN NOT NULL DEFAULT TRUE,
    push_follow_requests BOOLEAN NOT NULL DEFAULT TRUE,
    push_messages BOOLEAN NOT NULL DEFAULT TRUE,
    push_saves BOOLEAN NOT NULL DEFAULT TRUE,
    push_beacons BOOLEAN NOT NULL DEFAULT TRUE,
    
    -- Email notification toggles (for future use)
    email_enabled BOOLEAN NOT NULL DEFAULT FALSE,
    email_digest_frequency TEXT NOT NULL DEFAULT 'never', -- 'never', 'daily', 'weekly'
    
    -- Quiet hours (UTC)
    quiet_hours_enabled BOOLEAN NOT NULL DEFAULT FALSE,
    quiet_hours_start TIME,  -- e.g., '22:00:00'
    quiet_hours_end TIME,    -- e.g., '08:00:00'
    
    -- Badge settings
    show_badge_count BOOLEAN NOT NULL DEFAULT TRUE,
    
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- Add unread count cache to profiles for badge display
ALTER TABLE profiles ADD COLUMN IF NOT EXISTS unread_notification_count INTEGER NOT NULL DEFAULT 0;

-- Add group_key for notification batching/grouping
ALTER TABLE notifications ADD COLUMN IF NOT EXISTS group_key TEXT;
ALTER TABLE notifications ADD COLUMN IF NOT EXISTS priority TEXT NOT NULL DEFAULT 'normal'; -- 'low', 'normal', 'high', 'urgent'

-- Create indexes for efficient querying
CREATE INDEX IF NOT EXISTS idx_notifications_user_unread ON notifications(user_id, is_read) WHERE is_read = FALSE;
CREATE INDEX IF NOT EXISTS idx_notifications_group_key ON notifications(group_key) WHERE group_key IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_fcm_tokens_user ON user_fcm_tokens(user_id);

-- Function to update unread count on notification insert
CREATE OR REPLACE FUNCTION update_unread_notification_count()
RETURNS TRIGGER AS $$
BEGIN
    IF TG_OP = 'INSERT' THEN
        UPDATE profiles SET unread_notification_count = unread_notification_count + 1 WHERE id = NEW.user_id;
    ELSIF TG_OP = 'UPDATE' AND OLD.is_read = FALSE AND NEW.is_read = TRUE THEN
        UPDATE profiles SET unread_notification_count = GREATEST(0, unread_notification_count - 1) WHERE id = NEW.user_id;
    ELSIF TG_OP = 'DELETE' AND OLD.is_read = FALSE THEN
        UPDATE profiles SET unread_notification_count = GREATEST(0, unread_notification_count - 1) WHERE id = OLD.user_id;
    END IF;
    RETURN NEW;
END;
$$ LANGUAGE plpgsql;

-- Create trigger for automatic badge count updates
DROP TRIGGER IF EXISTS notification_count_trigger ON notifications;
CREATE TRIGGER notification_count_trigger
    AFTER INSERT OR UPDATE OR DELETE ON notifications
    FOR EACH ROW
    EXECUTE FUNCTION update_unread_notification_count();

-- Initialize notification preferences for existing users
INSERT INTO notification_preferences (user_id)
SELECT id FROM profiles
ON CONFLICT (user_id) DO NOTHING;