CREATE EXTENSION IF NOT EXISTS vector;
CREATE EXTENSION IF NOT EXISTS "uuid-ossp";

CREATE TABLE IF NOT EXISTS vector_stores (
    id            UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    name          VARCHAR(255) NOT NULL,
    owner_user_id VARCHAR(255) NOT NULL,
    created_at    TIMESTAMP DEFAULT NOW()
);

CREATE TABLE IF NOT EXISTS documents (
    id         UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    store_id   UUID REFERENCES vector_stores(id) ON DELETE CASCADE,
    content    TEXT NOT NULL,
    metadata   JSONB DEFAULT '{}',
    embedding  vector(1024),
    created_at TIMESTAMP DEFAULT NOW()
);

CREATE TABLE IF NOT EXISTS store_permissions (
    store_id   UUID REFERENCES vector_stores(id) ON DELETE CASCADE,
    user_id    VARCHAR(255) NOT NULL,
    permission VARCHAR(50) DEFAULT 'read',
    PRIMARY KEY (store_id, user_id)
);

CREATE TABLE IF NOT EXISTS usage_stats (
    id         UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id    VARCHAR(255) NOT NULL,
    store_id   UUID REFERENCES vector_stores(id) ON DELETE SET NULL,
    action     VARCHAR(50) NOT NULL,
    tokens     INT DEFAULT 0,
    duration   FLOAT DEFAULT 0,
    created_at TIMESTAMP DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_documents_store
    ON documents(store_id);
CREATE INDEX IF NOT EXISTS idx_documents_embedding
    ON documents USING ivfflat (embedding vector_cosine_ops)
    WITH (lists = 100);
CREATE INDEX IF NOT EXISTS idx_usage_user
    ON usage_stats(user_id);
CREATE INDEX IF NOT EXISTS idx_usage_created
    ON usage_stats(created_at);

GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO vecuser;
GRANT ALL PRIVILEGES ON ALL SEQUENCES IN SCHEMA public TO vecuser;