-- ============================================
-- GESTOR DE CONTEXTO - TABLAS EDITABLES
-- Estas tablas SÍ se pueden modificar
-- ============================================

-- ============================================
-- TABLA: context_blocks
-- Bloques de contexto reutilizables
-- ============================================

CREATE TABLE IF NOT EXISTS context_blocks (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),

    -- Identificación
    code VARCHAR(100) UNIQUE NOT NULL,
    name VARCHAR(255) NOT NULL,
    description TEXT,

    -- Contenido
    content TEXT NOT NULL,
    content_hash VARCHAR(64),  -- Para detectar cambios

    -- Clasificación
    category VARCHAR(50) NOT NULL,  -- system, persona, knowledge, rules, examples
    priority INT DEFAULT 50,         -- 0-100, mayor = más importante
    tokens_estimated INT,

    -- Alcance
    scope VARCHAR(50) DEFAULT 'global',  -- global, project, session
    project_id UUID,

    -- Condiciones de activación
    activation_rules JSONB DEFAULT '{}',
    /*
    Ejemplo activation_rules:
    {
        "always": false,
        "keywords": ["database", "sql"],
        "model_providers": ["anthropic"],
        "min_session_messages": 0,
        "time_of_day": null
    }
    */

    -- Estado
    active BOOLEAN DEFAULT true,
    version INT DEFAULT 1,

    -- Timestamps
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE INDEX IF NOT EXISTS idx_ctx_blocks_code ON context_blocks(code);
CREATE INDEX IF NOT EXISTS idx_ctx_blocks_category ON context_blocks(category);
CREATE INDEX IF NOT EXISTS idx_ctx_blocks_priority ON context_blocks(priority DESC);
CREATE INDEX IF NOT EXISTS idx_ctx_blocks_active ON context_blocks(active);
CREATE INDEX IF NOT EXISTS idx_ctx_blocks_scope ON context_blocks(scope);

DROP TRIGGER IF EXISTS update_ctx_blocks_updated_at ON context_blocks;
CREATE TRIGGER update_ctx_blocks_updated_at
    BEFORE UPDATE ON context_blocks
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

-- Trigger para calcular hash y tokens al insertar/actualizar
CREATE OR REPLACE FUNCTION update_block_metadata()
RETURNS TRIGGER AS $$
BEGIN
    NEW.content_hash := sha256_hash(NEW.content);
    -- Estimación simple: ~4 caracteres por token
    NEW.tokens_estimated := CEIL(LENGTH(NEW.content) / 4.0);
    RETURN NEW;
END;
$$ LANGUAGE plpgsql;

DROP TRIGGER IF EXISTS calc_block_metadata ON context_blocks;
CREATE TRIGGER calc_block_metadata
    BEFORE INSERT OR UPDATE OF content ON context_blocks
    FOR EACH ROW EXECUTE FUNCTION update_block_metadata();

-- ============================================
-- TABLA: knowledge_base
-- Base de conocimiento (RAG simple)
-- ============================================

CREATE TABLE IF NOT EXISTS knowledge_base (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),

    -- Identificación
    title VARCHAR(255) NOT NULL,
    category VARCHAR(100) NOT NULL,
    tags TEXT[] DEFAULT '{}',

    -- Contenido
    content TEXT NOT NULL,
    content_hash VARCHAR(64),
    tokens_estimated INT,

    -- Embeddings (para búsqueda semántica futura)
    embedding_model VARCHAR(100),
    embedding VECTOR(1536),  -- Requiere pgvector si se usa

    -- Fuente
    source_type VARCHAR(50),  -- file, url, manual, extracted
    source_ref TEXT,

    -- Relevancia
    priority INT DEFAULT 50,
    access_count INT DEFAULT 0,
    last_accessed_at TIMESTAMP,

    -- Estado
    active BOOLEAN DEFAULT true,

    -- Timestamps
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE INDEX IF NOT EXISTS idx_kb_category ON knowledge_base(category);
CREATE INDEX IF NOT EXISTS idx_kb_tags ON knowledge_base USING GIN(tags);
CREATE INDEX IF NOT EXISTS idx_kb_priority ON knowledge_base(priority DESC);
CREATE INDEX IF NOT EXISTS idx_kb_active ON knowledge_base(active);

DROP TRIGGER IF EXISTS update_kb_updated_at ON knowledge_base;
CREATE TRIGGER update_kb_updated_at
    BEFORE UPDATE ON knowledge_base
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

DROP TRIGGER IF EXISTS calc_kb_metadata ON knowledge_base;
CREATE TRIGGER calc_kb_metadata
    BEFORE INSERT OR UPDATE OF content ON knowledge_base
    FOR EACH ROW EXECUTE FUNCTION update_block_metadata();

-- ============================================
-- TABLA: memory
-- Memoria a largo plazo extraída de conversaciones
-- ============================================

CREATE TABLE IF NOT EXISTS memory (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),

    -- Clasificación
    type VARCHAR(50) NOT NULL,  -- fact, preference, decision, learning, procedure
    category VARCHAR(100),

    -- Contenido
    content TEXT NOT NULL,
    summary VARCHAR(500),
    content_hash VARCHAR(64),

    -- Origen
    extracted_from_session UUID REFERENCES sessions(id),
    extracted_from_log UUID,  -- No FK para no bloquear

    -- Relevancia
    importance INT DEFAULT 50,  -- 0-100
    confidence DECIMAL(3,2) DEFAULT 1.0,  -- 0.00-1.00
    uses INT DEFAULT 0,
    last_used_at TIMESTAMP,

    -- Expiración
    expires_at TIMESTAMP,

    -- Estado
    active BOOLEAN DEFAULT true,
    verified BOOLEAN DEFAULT false,  -- Confirmado por usuario

    -- Timestamps
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE INDEX IF NOT EXISTS idx_memory_type ON memory(type);
CREATE INDEX IF NOT EXISTS idx_memory_importance ON memory(importance DESC);
CREATE INDEX IF NOT EXISTS idx_memory_active ON memory(active);
CREATE INDEX IF NOT EXISTS idx_memory_expires ON memory(expires_at);

DROP TRIGGER IF EXISTS update_memory_updated_at ON memory;
CREATE TRIGGER update_memory_updated_at
    BEFORE UPDATE ON memory
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

-- ============================================
-- TABLA: ambient_context
-- Contexto ambiental (estado actual del sistema)
-- ============================================

CREATE TABLE IF NOT EXISTS ambient_context (
    id SERIAL PRIMARY KEY,

    -- Snapshot
    captured_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    expires_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP + INTERVAL '1 hour',

    -- Datos ambientales
    environment JSONB DEFAULT '{}',
    /*
    {
        "timezone": "Europe/Madrid",
        "locale": "es-ES",
        "working_directory": "/home/user/project",
        "git_branch": "main",
        "active_project": "my-app"
    }
    */

    -- Estado del sistema
    system_state JSONB DEFAULT '{}',
    /*
    {
        "servers": {"architect": "online"},
        "services": {"gitea": "running"},
        "pending_tasks": [],
        "alerts": []
    }
    */

    -- Archivos/recursos activos
    active_resources JSONB DEFAULT '[]'
    /*
    [
        {"type": "file", "path": "/path/to/file.py", "modified": true},
        {"type": "url", "href": "https://docs.example.com"}
    ]
    */
);

CREATE INDEX IF NOT EXISTS idx_ambient_captured ON ambient_context(captured_at DESC);
CREATE INDEX IF NOT EXISTS idx_ambient_expires ON ambient_context(expires_at);

-- Limpiar contextos expirados
CREATE OR REPLACE FUNCTION cleanup_expired_ambient()
RETURNS INTEGER AS $$
DECLARE
    deleted_count INTEGER;
BEGIN
    DELETE FROM ambient_context
    WHERE expires_at < CURRENT_TIMESTAMP;
    GET DIAGNOSTICS deleted_count = ROW_COUNT;
    RETURN deleted_count;
END;
$$ LANGUAGE plpgsql;