-- ============================================================
-- FreightDesk — Migration 005: SaaS Marketplace Foundation
-- Adds shipper/driver self-registration, load marketplace, bidding
-- ============================================================

-- ============================================================
-- 1. ENHANCE SHIPPERS TABLE (self-registration support)
-- ============================================================
ALTER TABLE shippers ADD COLUMN IF NOT EXISTS user_id UUID REFERENCES auth.users(id);
ALTER TABLE shipppers ADD COLUMN IF NOT EXISTS is_verified BOOLEAN DEFAULT false;
ALTER TABLE shipppers ADD COLUMN IF NOT EXISTS verification_token TEXT;
ALTER TABLE shipppers ADD COLUMN IF NOT EXISTS company_name TEXT;
ALTER TABLE shipppers ADD COLUMN IF NOT EXISTS gst_number TEXT;
ALTER TABLE shipppers ADD COLUMN IF NOT EXISTS pan_number TEXT;
ALTER TABLE shipppers ADD COLUMN IF NOT EXISTS address TEXT;
ALTER TABLE shippers ADD COLUMN IF NOT EXISTS pincode TEXT;
ALTER TABLE shippers ADD COLUMN IF NOT EXISTS rating DECIMAL(3,2) DEFAULT 0;
ALTER TABLE shippers ADD COLUMN IF NOT EXISTS total_shipments INTEGER DEFAULT 0;

-- ============================================================
-- 2. ENHANCE VEHICLES/DRIVERS TABLE (self-registration support)
-- ============================================================
ALTER TABLE vehicles ADD COLUMN IF NOT EXISTS user_id UUID REFERENCES auth.users(id);
ALTER TABLE vehicles ADD COLUMN IF NOT EXISTS driver_name TEXT;
ALTER TABLE vehicles ADD COLUMN IF NOT EXISTS driver_phone TEXT;
ALTER TABLE vehicles ADD COLUMN IF NOT EXISTS driver_license TEXT;
ALTER TABLE vehicles ADD COLUMN IF NOT EXISTS is_verified BOOLEAN DEFAULT false;
ALTER TABLE vehicles ADD COLUMN IF NOT EXISTS verification_token TEXT;
ALTER TABLE vehicles ADD COLUMN IF NOT EXISTS vehicle_type TEXT; -- 'mini_truck', 'truck', 'trailer', 'container'
ALTER TABLE vehicles ADD COLUMN IF NOT EXISTS capacity_tons DECIMAL(6,2);
ALTER TABLE vehicles ADD COLUMN IF NOT EXISTS body_type TEXT; -- 'open', 'closed', 'container', 'tanker'
ALTER TABLE vehicles ADD COLUMN IF NOT EXISTS current_lat DECIMAL(10,8);
ALTER TABLE vehicles ADD COLUMN IF NOT EXISTS current_lng DECIMAL(11,8);
ALTER TABLE vehicles ADD COLUMN IF NOT EXISTS current_city TEXT;
ALTER TABLE vehicles ADD COLUMN IF NOT EXISTS is_available BOOLEAN DEFAULT true;
ALTER TABLE vehicles ADD COLUMN IF NOT EXISTS rating DECIMAL(3,2) DEFAULT 0;
ALTER TABLE vehicles ADD COLUMN IF NOT EXISTS total_trips INTEGER DEFAULT 0;

-- ============================================================
-- 3. ENHANCE LOADS TABLE (marketplace support)
-- ============================================================
ALTER TABLE loads ADD COLUMN IF NOT EXISTS posted_by UUID REFERENCES auth.users(id);
ALTER TABLE loads ADD COLUMN IF NOT EXISTS load_type TEXT; -- 'ftl', 'ptl', 'parcel'
ALTER TABLE loads ADD COLUMN IF NOT EXISTS weight_kg INTEGER;
ALTER TABLE loads ADD COLUMN IF NOT EXISTS material_type TEXT;
ALTER TABLE loads ADD COLUMN IF NOT EXISTS packaging_type TEXT;
ALTER TABLE loads ADD COLUMN IF NOT EXISTS pickup_address TEXT;
ALTER TABLE loads ADD COLUMN IF NOT EXISTS pickup_pincode TEXT;
ALTER TABLE loads ADD COLUMN IF NOT EXISTS pickup_lat DECIMAL(10,8);
ALTER TABLE loads ADD COLUMN IF NOT EXISTS pickup_lng DECIMAL(11,8);
ALTER TABLE loads ADD COLUMN IF NOT EXISTS delivery_address TEXT;
ALTER TABLE loads ADD COLUMN IF NOT EXISTS delivery_pincode TEXT;
ALTER TABLE loads ADD COLUMN IF NOT EXISTS delivery_lat DECIMAL(10,8);
ALTER TABLE loads ADD COLUMN IF NOT EXISTS delivery_lng DECIMAL(11,8);
ALTER TABLE loads ADD COLUMN IF NOT EXISTS pickup_date DATE;
ALTER TABLE loads ADD COLUMN IF NOT EXISTS delivery_date DATE;
ALTER TABLE loads ADD COLUMN IF NOT EXISTS budget_min INTEGER;
ALTER TABLE loads ADD COLUMN IF NOT EXISTS budget_max INTEGER;
ALTER TABLE loads ADD COLUMN IF NOT EXISTS is_open BOOLEAN DEFAULT true; -- open for bidding
ALTER TABLE loads ADD COLUMN IF NOT EXISTS expires_at TIMESTAMP WITH TIME ZONE;
ALTER TABLE loads ADD COLUMN IF NOT EXISTS accepted_bid_id UUID;
ALTER TABLE loads ADD COLUMN IF NOT EXISTS views INTEGER DEFAULT 0;

-- ============================================================
-- 4. BIDS TABLE
-- ============================================================
CREATE TABLE IF NOT EXISTS bids (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  load_id UUID NOT NULL REFERENCES loads(id) ON DELETE CASCADE,
  driver_id UUID NOT NULL REFERENCES vehicles(id),
  shipper_id UUID REFERENCES shippers(id),
  amount INTEGER NOT NULL,
  message TEXT,
  status TEXT DEFAULT 'pending' CHECK (status IN ('pending', 'accepted', 'rejected', 'withdrawn', 'expired')),
  valid_until TIMESTAMP WITH TIME ZONE,
  created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
  updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
  UNIQUE(load_id, driver_id) -- one bid per driver per load
);

CREATE INDEX IF NOT EXISTS idx_bids_load ON bids(load_id);
CREATE INDEX IF NOT EXISTS idx_bids_driver ON bids(driver_id);
CREATE INDEX IF NOT EXISTS idx_bids_status ON bids(status);

-- ============================================================
-- 5. NEGOTIATION / COUNTER-OFFERS TABLE
-- ============================================================
CREATE TABLE IF NOT EXISTS negotiations (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  bid_id UUID NOT NULL REFERENCES bids(id) ON DELETE CASCADE,
  proposed_by UUID NOT NULL, -- user_id who proposed
  proposed_amount INTEGER NOT NULL,
  message TEXT,
  status TEXT DEFAULT 'pending' CHECK (status IN ('pending', 'accepted', 'rejected', 'countered')),
  created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_negotiations_bid ON negotiations(bid_id);

-- ============================================================
-- 6. RATINGS & REVIEWS TABLE
-- ============================================================
CREATE TABLE IF NOT EXISTS ratings (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  from_user_id UUID NOT NULL,
  to_user_id UUID NOT NULL,
  load_id UUID REFERENCES loads(id),
  driver_id UUID REFERENCES vehicles(id),
  shipper_id UUID REFERENCES shippers(id),
  rating INTEGER NOT NULL CHECK (rating >= 1 AND rating <= 5),
  review TEXT,
  created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_ratings_to_user ON ratings(to_user_id);
CREATE INDEX IF NOT EXISTS idx_ratings_driver ON ratings(driver_id);
CREATE INDEX IF NOT EXISTS idx_ratings_shipper ON ratings(shipper_id);

-- ============================================================
-- 7. NOTIFICATIONS TABLE
-- ============================================================
CREATE TABLE IF NOT EXISTS notifications (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  user_id UUID NOT NULL,
  type TEXT NOT NULL CHECK (type IN ('bid_received', 'bid_accepted', 'bid_rejected', 'negotiation', 'load_assigned', 'delivery_update', 'payment', 'system')),
  title TEXT NOT NULL,
  message TEXT,
  data JSONB DEFAULT '{}',
  is_read BOOLEAN DEFAULT false,
  created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_notifications_user ON notifications(user_id);
CREATE INDEX IF NOT EXISTS idx_notifications_unread ON notifications(user_id, is_read) WHERE is_read = false;

-- ============================================================
-- 8. LOAD VIEWS TABLE (analytics)
-- ============================================================
CREATE TABLE IF NOT EXISTS load_views (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  load_id UUID NOT NULL REFERENCES loads(id) ON DELETE CASCADE,
  viewer_id UUID,
  viewed_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_load_views_load ON load_views(load_id);