-- Fix consulting_slots table: ensure user_id column exists, backfill from orders, and add RLS policies
-- This fixes the 400 error when members try to fetch their consulting slots

-- Add user_id column if it doesn't exist
DO $$
BEGIN
    IF NOT EXISTS (
        SELECT 1 FROM information_schema.columns
        WHERE table_name = 'consulting_slots'
        AND column_name = 'user_id'
    ) THEN
        ALTER TABLE consulting_slots
        ADD COLUMN user_id UUID REFERENCES auth.users(id) ON DELETE CASCADE;

        RAISE NOTICE 'user_id column added to consulting_slots';
    ELSE
        RAISE NOTICE 'user_id column already exists in consulting_slots';
    END IF;
END $$;

-- Backfill user_id from orders for existing records
DO $$
DECLARE
    backfill_count INTEGER;
    null_count INTEGER;
BEGIN
    -- Count NULL user_ids before backfill
    SELECT COUNT(*) INTO null_count FROM consulting_slots WHERE user_id IS NULL;
    RAISE NOTICE 'Found % consulting_slots with NULL user_id', null_count;

    -- Backfill from orders
    UPDATE consulting_slots cs
    SET user_id = o.user_id
    FROM orders o
    WHERE cs.order_id = o.id
      AND cs.user_id IS NULL;

    GET DIAGNOSTICS backfill_count = ROW_COUNT;
    RAISE NOTICE 'Backfilled user_id for % consulting_slots from orders', backfill_count;

    -- Check remaining NULLs
    SELECT COUNT(*) INTO null_count FROM consulting_slots WHERE user_id IS NULL;
    RAISE NOTICE 'Remaining consulting_slots with NULL user_id: %', null_count;
END $$;

-- Create index for faster queries
CREATE INDEX IF NOT EXISTS idx_consulting_slots_user_id ON consulting_slots(user_id);
CREATE INDEX IF NOT EXISTS idx_consulting_slots_user_status ON consulting_slots(user_id, status);

-- Enable RLS on consulting_slots (if not already enabled)
ALTER TABLE consulting_slots ENABLE ROW LEVEL SECURITY;

-- Drop ALL existing policies first to avoid conflicts
DROP POLICY IF EXISTS "consulting_slots_select_own" ON consulting_slots;
DROP POLICY IF EXISTS "consulting_slots_insert_own" ON consulting_slots;
DROP POLICY IF EXISTS "consulting_slots_update_own" ON consulting_slots;
DROP POLICY IF EXISTS "consulting_slots_select_all" ON consulting_slots;
DROP POLICY IF EXISTS "consulting_slots_service_role" ON consulting_slots;

-- Create RLS policies for consulting_slots
-- Policy for users to see their own slots
CREATE POLICY "consulting_slots_select_own"
ON consulting_slots
FOR SELECT
TO authenticated
USING (auth.uid() = user_id);

-- Policy for users to insert their own slots
CREATE POLICY "consulting_slots_insert_own"
ON consulting_slots
FOR INSERT
TO authenticated
WITH CHECK (auth.uid() = user_id);

-- Policy for users to update their own slots
CREATE POLICY "consulting_slots_update_own"
ON consulting_slots
FOR UPDATE
TO authenticated
USING (auth.uid() = user_id)
WITH CHECK (auth.uid() = user_id);

-- Policy for service role (admins) to access all slots
CREATE POLICY "consulting_slots_service_role"
ON consulting_slots
FOR ALL
TO service_role
USING (true)
WITH CHECK (true);

-- Grant permissions
GRANT USAGE ON SCHEMA public TO service_role;
GRANT ALL ON consulting_slots TO service_role;
GRANT SELECT, INSERT, UPDATE, DELETE ON consulting_slots TO authenticated;