-- ============================================================
-- Map Layers & Pins: persistent map data for department map module
-- ============================================================

-- 1. Map Layers (each department can have multiple map layers)
CREATE TABLE map_layers (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  department_id UUID NOT NULL REFERENCES event_departments(id) ON DELETE CASCADE,
  name TEXT NOT NULL DEFAULT 'Map',
  layer_type TEXT NOT NULL DEFAULT 'osm' CHECK (layer_type IN ('osm', 'image')),
  image_url TEXT,
  image_width INT,
  image_height INT,
  center_lat DOUBLE PRECISION DEFAULT 0,
  center_lng DOUBLE PRECISION DEFAULT 0,
  zoom_level INT DEFAULT 13,
  sort_order INT NOT NULL DEFAULT 0,
  created_by UUID REFERENCES auth.users(id) ON DELETE SET NULL,
  created_at TIMESTAMPTZ DEFAULT now(),
  updated_at TIMESTAMPTZ DEFAULT now()
);

CREATE INDEX idx_map_layers_dept ON map_layers(department_id);

-- 2. Map Pins (belong to a layer)
CREATE TABLE map_pins (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  layer_id UUID NOT NULL REFERENCES map_layers(id) ON DELETE CASCADE,
  label TEXT NOT NULL,
  description TEXT DEFAULT '',
  color TEXT NOT NULL DEFAULT '#EF4444',
  lat DOUBLE PRECISION NOT NULL,
  lng DOUBLE PRECISION NOT NULL,
  bounds_north DOUBLE PRECISION,
  bounds_south DOUBLE PRECISION,
  bounds_east DOUBLE PRECISION,
  bounds_west DOUBLE PRECISION,
  sort_order INT NOT NULL DEFAULT 0,
  created_by UUID REFERENCES auth.users(id) ON DELETE SET NULL,
  created_at TIMESTAMPTZ DEFAULT now(),
  updated_at TIMESTAMPTZ DEFAULT now()
);

CREATE INDEX idx_map_pins_layer ON map_pins(layer_id);

-- 3. RLS
ALTER TABLE map_layers ENABLE ROW LEVEL SECURITY;
ALTER TABLE map_pins ENABLE ROW LEVEL SECURITY;

-- Map Layers: org members can view
CREATE POLICY "Org members can view map layers" ON map_layers FOR SELECT
  USING (EXISTS (
    SELECT 1 FROM event_departments ed
    JOIN events e ON ed.event_id = e.id
    JOIN org_members om ON e.org_id = om.org_id
    WHERE ed.id = map_layers.department_id AND om.user_id = auth.uid()
  ));

-- Map Layers: dept members + editors can manage
CREATE POLICY "Dept members and editors can manage map layers" ON map_layers FOR ALL
  USING (EXISTS (
    SELECT 1 FROM event_departments ed
    JOIN events e ON ed.event_id = e.id
    JOIN org_members om ON e.org_id = om.org_id
    WHERE ed.id = map_layers.department_id
      AND om.user_id = auth.uid()
      AND (
        om.role IN ('owner', 'admin', 'editor')
        OR EXISTS (
          SELECT 1 FROM event_member_departments emd
          JOIN event_members em ON emd.event_member_id = em.id
          WHERE emd.department_id = ed.id AND em.user_id = auth.uid()
        )
      )
  ));

-- Map Pins: org members can view
CREATE POLICY "Org members can view map pins" ON map_pins FOR SELECT
  USING (EXISTS (
    SELECT 1 FROM map_layers ml
    JOIN event_departments ed ON ml.department_id = ed.id
    JOIN events e ON ed.event_id = e.id
    JOIN org_members om ON e.org_id = om.org_id
    WHERE ml.id = map_pins.layer_id AND om.user_id = auth.uid()
  ));

-- Map Pins: dept members + editors can manage
CREATE POLICY "Dept members and editors can manage map pins" ON map_pins FOR ALL
  USING (EXISTS (
    SELECT 1 FROM map_layers ml
    JOIN event_departments ed ON ml.department_id = ed.id
    JOIN events e ON ed.event_id = e.id
    JOIN org_members om ON e.org_id = om.org_id
    WHERE ml.id = map_pins.layer_id
      AND om.user_id = auth.uid()
      AND (
        om.role IN ('owner', 'admin', 'editor')
        OR EXISTS (
          SELECT 1 FROM event_member_departments emd
          JOIN event_members em ON emd.event_member_id = em.id
          WHERE emd.department_id = ed.id AND em.user_id = auth.uid()
        )
      )
  ));

-- 4. Realtime
ALTER PUBLICATION supabase_realtime ADD TABLE map_layers;
ALTER PUBLICATION supabase_realtime ADD TABLE map_pins;