-- AI Assistant plugin initial migration

CREATE TABLE IF NOT EXISTS ai_providers (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    name VARCHAR(100) NOT NULL,
    provider_type VARCHAR(50) NOT NULL,
    api_key TEXT NOT NULL DEFAULT '',
    base_url VARCHAR(500) NOT NULL DEFAULT '',
    is_active BOOLEAN NOT NULL DEFAULT TRUE,
    is_default BOOLEAN NOT NULL DEFAULT FALSE,
    config JSONB NOT NULL DEFAULT '{}',
    tenant_id UUID NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    deleted_at TIMESTAMPTZ
);
CREATE INDEX IF NOT EXISTS ix_ai_providers_tenant ON ai_providers(tenant_id);

CREATE TABLE IF NOT EXISTS ai_models (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    provider_id UUID NOT NULL REFERENCES ai_providers(id) ON DELETE CASCADE,
    model_id VARCHAR(200) NOT NULL,
    display_name VARCHAR(200) NOT NULL,
    context_window INTEGER NOT NULL DEFAULT 4096,
    supports_tools BOOLEAN NOT NULL DEFAULT FALSE,
    supports_streaming BOOLEAN NOT NULL DEFAULT TRUE,
    is_active BOOLEAN NOT NULL DEFAULT TRUE,
    config JSONB NOT NULL DEFAULT '{}',
    tenant_id UUID NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    deleted_at TIMESTAMPTZ
);
CREATE INDEX IF NOT EXISTS ix_ai_models_provider ON ai_models(provider_id);
CREATE INDEX IF NOT EXISTS ix_ai_models_tenant ON ai_models(tenant_id);

CREATE TABLE IF NOT EXISTS ai_presets (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    name VARCHAR(100) NOT NULL,
    model_id VARCHAR(200) NOT NULL,
    provider_id UUID REFERENCES ai_providers(id) ON DELETE SET NULL,
    temperature REAL NOT NULL DEFAULT 0.7,
    max_tokens INTEGER NOT NULL DEFAULT 2048,
    top_p REAL NOT NULL DEFAULT 1.0,
    system_prompt TEXT NOT NULL DEFAULT '',
    config JSONB NOT NULL DEFAULT '{}',
    is_active BOOLEAN NOT NULL DEFAULT TRUE,
    tenant_id UUID NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    deleted_at TIMESTAMPTZ
);
CREATE INDEX IF NOT EXISTS ix_ai_presets_tenant ON ai_presets(tenant_id);

CREATE TABLE IF NOT EXISTS ai_agents (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    name VARCHAR(100) NOT NULL,
    description TEXT NOT NULL DEFAULT '',
    system_prompt TEXT NOT NULL DEFAULT '',
    preset_id UUID REFERENCES ai_presets(id) ON DELETE SET NULL,
    tool_ids JSONB NOT NULL DEFAULT '[]',
    is_default BOOLEAN NOT NULL DEFAULT FALSE,
    is_active BOOLEAN NOT NULL DEFAULT TRUE,
    config JSONB NOT NULL DEFAULT '{}',
    tenant_id UUID NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    deleted_at TIMESTAMPTZ
);
CREATE INDEX IF NOT EXISTS ix_ai_agents_tenant ON ai_agents(tenant_id);

CREATE TABLE IF NOT EXISTS ai_chat_sessions (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL,
    agent_id UUID REFERENCES ai_agents(id) ON DELETE SET NULL,
    title VARCHAR(255) NOT NULL DEFAULT 'Neuer Chat',
    is_pinned BOOLEAN NOT NULL DEFAULT FALSE,
    is_sidebar BOOLEAN NOT NULL DEFAULT FALSE,
    tenant_id UUID NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    deleted_at TIMESTAMPTZ
);
CREATE INDEX IF NOT EXISTS ix_ai_sessions_user ON ai_chat_sessions(user_id);
CREATE INDEX IF NOT EXISTS ix_ai_sessions_tenant ON ai_chat_sessions(tenant_id);

CREATE TABLE IF NOT EXISTS ai_chat_messages (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    session_id UUID NOT NULL REFERENCES ai_chat_sessions(id) ON DELETE CASCADE,
    role VARCHAR(20) NOT NULL,
    content TEXT NOT NULL DEFAULT '',
    tool_calls JSONB,
    tool_results JSONB,
    tokens INTEGER NOT NULL DEFAULT 0,
    model_used VARCHAR(200) NOT NULL DEFAULT '',
    tenant_id UUID NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    deleted_at TIMESTAMPTZ
);
CREATE INDEX IF NOT EXISTS ix_ai_messages_session ON ai_chat_messages(session_id);
CREATE INDEX IF NOT EXISTS ix_ai_messages_tenant ON ai_chat_messages(tenant_id);