-- ============================================
-- LOG DE TRABAJO (Work Log)
-- Sistema TZZR - contratos-comunes
-- ============================================
-- Requiere: 00_types.sql, 02_task_manager.sql

-- ============================================
-- TABLA: task_work_log
-- Registro de archivos entrantes/salientes
-- ============================================

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

    -- Relación con tarea (opcional)
    task_id UUID REFERENCES task_manager(id) ON DELETE SET NULL,
    project_id UUID REFERENCES task_projects(id) ON DELETE SET NULL,

    -- Dirección
    direction file_direction NOT NULL,

    -- Información del archivo
    filename VARCHAR(500) NOT NULL,
    filepath TEXT,                              -- Ruta en FileBrowser o URL
    file_hash VARCHAR(64),                      -- SHA-256 del contenido
    file_size_bytes BIGINT,
    mime_type VARCHAR(100),
    file_extension VARCHAR(20),

    -- Origen/Destino
    source VARCHAR(255),                        -- email, upload, api, scrape, etc.
    source_ref VARCHAR(500),                    -- Referencia específica (message_id, url, etc.)
    destination VARCHAR(255),                   -- grace, penny, factory, export, storage
    destination_ref VARCHAR(500),

    -- Procesamiento IA
    processed_by_ia BOOLEAN DEFAULT false,
    ai_service ai_service,
    ai_module VARCHAR(50),                      -- Módulo específico (ASR_ENGINE, OCR_CORE, etc.)
    ai_trace_id VARCHAR(64),                    -- trace_id del S-CONTRACT
    ai_status VARCHAR(20),                      -- SUCCESS, ERROR, PARTIAL
    ai_result_summary JSONB,                    -- Resumen del resultado

    -- Descripción
    titulo VARCHAR(255),
    descripcion TEXT,

    -- Etiquetas (h_maestros)
    tags JSONB DEFAULT '[]',

    -- Metadata
    metadata JSONB DEFAULT '{}',

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

CREATE INDEX IF NOT EXISTS idx_work_log_task ON task_work_log(task_id);
CREATE INDEX IF NOT EXISTS idx_work_log_project ON task_work_log(project_id);
CREATE INDEX IF NOT EXISTS idx_work_log_direction ON task_work_log(direction);
CREATE INDEX IF NOT EXISTS idx_work_log_hash ON task_work_log(file_hash);
CREATE INDEX IF NOT EXISTS idx_work_log_source ON task_work_log(source);
CREATE INDEX IF NOT EXISTS idx_work_log_destination ON task_work_log(destination);
CREATE INDEX IF NOT EXISTS idx_work_log_ai_service ON task_work_log(ai_service);
CREATE INDEX IF NOT EXISTS idx_work_log_ai_trace ON task_work_log(ai_trace_id);
CREATE INDEX IF NOT EXISTS idx_work_log_fecha ON task_work_log(created_at);
CREATE INDEX IF NOT EXISTS idx_work_log_tags ON task_work_log USING GIN(tags);
CREATE INDEX IF NOT EXISTS idx_work_log_mime ON task_work_log(mime_type);

-- ============================================
-- TABLA: task_work_log_versions
-- Versiones de archivos (tracking de cambios)
-- ============================================

CREATE TABLE IF NOT EXISTS task_work_log_versions (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    work_log_id UUID NOT NULL REFERENCES task_work_log(id) ON DELETE CASCADE,

    version INTEGER NOT NULL,
    filepath TEXT NOT NULL,
    file_hash VARCHAR(64) NOT NULL,
    file_size_bytes BIGINT,

    -- Cambio
    change_type VARCHAR(50),                    -- created, modified, processed, exported
    change_description TEXT,
    changed_by VARCHAR(100),

    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,

    CONSTRAINT unique_version UNIQUE(work_log_id, version)
);

CREATE INDEX IF NOT EXISTS idx_work_log_versions_log ON task_work_log_versions(work_log_id);
CREATE INDEX IF NOT EXISTS idx_work_log_versions_hash ON task_work_log_versions(file_hash);

-- ============================================
-- FUNCIÓN: Auto-incrementar versión
-- ============================================

CREATE OR REPLACE FUNCTION auto_version_work_log()
RETURNS TRIGGER AS $$
DECLARE
    next_version INTEGER;
BEGIN
    SELECT COALESCE(MAX(version), 0) + 1
    INTO next_version
    FROM task_work_log_versions
    WHERE work_log_id = NEW.work_log_id;

    NEW.version := next_version;
    RETURN NEW;
END;
$$ LANGUAGE plpgsql;

DROP TRIGGER IF EXISTS trigger_auto_version_work_log ON task_work_log_versions;
CREATE TRIGGER trigger_auto_version_work_log
BEFORE INSERT ON task_work_log_versions
FOR EACH ROW EXECUTE FUNCTION auto_version_work_log();

-- ============================================
-- VISTA: Work log reciente
-- ============================================

CREATE OR REPLACE VIEW v_work_log_recent AS
SELECT
    w.id,
    w.filename,
    w.direction,
    w.source,
    w.destination,
    w.ai_service,
    w.ai_module,
    w.ai_status,
    w.processed_by_ia,
    t.titulo AS tarea,
    t.codigo AS tarea_codigo,
    p.nombre AS proyecto,
    p.codigo AS proyecto_codigo,
    w.file_size_bytes,
    w.mime_type,
    w.created_at,
    w.processed_at
FROM task_work_log w
LEFT JOIN task_manager t ON w.task_id = t.id
LEFT JOIN task_projects p ON w.project_id = p.id
ORDER BY w.created_at DESC;

-- ============================================
-- VISTA: Archivos pendientes de procesar
-- ============================================

CREATE OR REPLACE VIEW v_work_log_pending AS
SELECT
    w.id,
    w.filename,
    w.mime_type,
    w.file_size_bytes,
    w.source,
    w.direction,
    p.nombre AS proyecto,
    w.created_at
FROM task_work_log w
LEFT JOIN task_projects p ON w.project_id = p.id
WHERE w.processed_by_ia = false
  AND w.direction IN ('inbound', 'internal')
ORDER BY w.created_at ASC;