-- Model Groups: logical model abstraction for cross-provider failover
--
-- A model group maps a logical name (e.g. "coding") to multiple physical models
-- across different providers. When one provider's key pool is exhausted,
-- the relay automatically falls over to the next provider.
--
-- Routing strategy "quota_aware" sorts candidates by remaining RPM/TPM capacity.

CREATE TABLE IF NOT EXISTS model_groups (
    id TEXT PRIMARY KEY,
    name TEXT NOT NULL UNIQUE,
    display_name TEXT NOT NULL DEFAULT '',
    description TEXT NOT NULL DEFAULT '',
    enabled BOOLEAN NOT NULL DEFAULT TRUE,
    failover_strategy TEXT NOT NULL DEFAULT 'quota_aware',
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE IF NOT EXISTS model_group_members (
    id TEXT PRIMARY KEY,
    group_id TEXT NOT NULL REFERENCES model_groups(id) ON DELETE CASCADE,
    provider_id TEXT NOT NULL REFERENCES providers(id) ON DELETE CASCADE,
    model_id TEXT NOT NULL,
    priority INTEGER NOT NULL DEFAULT 0,
    enabled BOOLEAN NOT NULL DEFAULT TRUE,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_mgm_group ON model_group_members(group_id);
CREATE UNIQUE INDEX IF NOT EXISTS idx_mgm_unique ON model_group_members(group_id, provider_id, model_id);