CREATE EXTENSION IF NOT EXISTS pg_trgm;

CREATE TABLE image_folders (
  id         BIGSERIAL PRIMARY KEY,
  tenant_id  BIGINT NOT NULL,
  name       VARCHAR(100) NOT NULL,
  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  CONSTRAINT uq_image_folders_tenant_name UNIQUE (tenant_id, name),
  CONSTRAINT uq_image_folders_tenant_id UNIQUE (tenant_id, id)
);

CREATE INDEX idx_image_folders_tenant ON image_folders (tenant_id);

CREATE TABLE image_assets (
  id           BIGSERIAL PRIMARY KEY,
  tenant_id    BIGINT NOT NULL,
  folder_id    BIGINT,
  object_key   TEXT NOT NULL UNIQUE,
  name         VARCHAR(255) NOT NULL,
  size_bytes   BIGINT NOT NULL,
  status       VARCHAR(20) NOT NULL DEFAULT 'active',
  created_by   BIGINT NOT NULL,
  updated_at   TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  created_at   TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  deleted_at   TIMESTAMPTZ,
  CONSTRAINT fk_image_assets_folder
    FOREIGN KEY (tenant_id, folder_id)
    REFERENCES image_folders(tenant_id, id),
  CONSTRAINT uq_image_assets_tenant_id UNIQUE (tenant_id, id)
);

CREATE INDEX idx_image_assets_tenant_folder ON image_assets (tenant_id, folder_id) WHERE status = 'active' AND deleted_at IS NULL;
CREATE INDEX idx_image_assets_tenant_created ON image_assets (tenant_id, created_at DESC) WHERE status = 'active' AND deleted_at IS NULL;
CREATE INDEX idx_image_assets_tenant_status ON image_assets (tenant_id, status, created_at DESC);
CREATE INDEX idx_image_assets_name_trgm ON image_assets USING GIN (name gin_trgm_ops) WHERE status = 'active' AND deleted_at IS NULL;

CREATE TABLE image_asset_references (
  id             BIGSERIAL PRIMARY KEY,
  tenant_id      BIGINT NOT NULL,
  image_asset_id BIGINT NOT NULL,
  article_id     BIGINT NOT NULL,
  ref_scope      VARCHAR(20) NOT NULL,
  updated_at     TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  created_at     TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  CONSTRAINT fk_image_asset_references_asset
    FOREIGN KEY (tenant_id, image_asset_id)
    REFERENCES image_assets(tenant_id, id)
    ON DELETE CASCADE,
  CONSTRAINT uq_image_asset_reference UNIQUE (image_asset_id, article_id, ref_scope)
);

CREATE INDEX idx_image_asset_references_asset ON image_asset_references (tenant_id, image_asset_id);
CREATE INDEX idx_image_asset_references_article ON image_asset_references (tenant_id, article_id);

CREATE TABLE tenant_image_storage_usage (
  tenant_id   BIGINT PRIMARY KEY,
  used_bytes  BIGINT NOT NULL DEFAULT 0,
  updated_at  TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

UPDATE plans
SET quota_policy_json = quota_policy_json ||
  CASE plan_code
    WHEN 'free' THEN '{"image_storage_bytes":104857600}'::jsonb
    WHEN 'regular' THEN '{"image_storage_bytes":1073741824}'::jsonb
    WHEN 'premium' THEN '{"image_storage_bytes":2147483648}'::jsonb
    ELSE '{}'::jsonb
  END
WHERE deleted_at IS NULL;