-- ERV Platform Database Initialization Script
-- PostgreSQL 16+

-- Enable extensions
CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
CREATE EXTENSION IF NOT EXISTS "pg_trgm";

-- ============================================
-- ТАБЛИЦА: claims (Основные заявки)
-- ============================================
CREATE TABLE IF NOT EXISTS claims (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    claim_number VARCHAR(50) UNIQUE NOT NULL,
    
    -- Тип страхования
    insurance_type VARCHAR(50) NOT NULL DEFAULT 'erv_travel',
    case_type VARCHAR(100), -- например: 'flight_delay', 'medical', 'baggage_loss'
    
    -- Данные клиента
    client_phone VARCHAR(20) NOT NULL,
    client_email VARCHAR(255),
    client_inn VARCHAR(12),
    client_full_name VARCHAR(500),
    
    -- Данные полиса
    policy_number VARCHAR(100),
    policy_series VARCHAR(50),
    
    -- Статус обработки
    status VARCHAR(50) NOT NULL DEFAULT 'draft', -- draft, processing, crm_sent, completed, error
    crm_id VARCHAR(100), -- ID в Vtiger CRM
    
    -- Данные для аналитики
    source VARCHAR(100), -- откуда пришла заявка: 'web_form', 'api', 'mobile_app'
    user_agent TEXT,
    ip_address INET,
    
    -- Timestamps
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    submitted_at TIMESTAMP WITH TIME ZONE,
    completed_at TIMESTAMP WITH TIME ZONE,
    
    -- JSON поля для гибкости
    form_data JSONB, -- все данные формы
    metadata JSONB -- дополнительные метаданные
);

-- Индексы для claims
CREATE INDEX idx_claims_claim_number ON claims(claim_number);
CREATE INDEX idx_claims_status ON claims(status);
CREATE INDEX idx_claims_created_at ON claims(created_at DESC);
CREATE INDEX idx_claims_client_phone ON claims(client_phone);
CREATE INDEX idx_claims_policy_number ON claims(policy_number);
CREATE INDEX idx_claims_insurance_type ON claims(insurance_type);
CREATE INDEX idx_claims_form_data_gin ON claims USING gin(form_data);

-- ============================================
-- ТАБЛИЦА: claim_files (Файлы к заявкам)
-- ============================================
CREATE TABLE IF NOT EXISTS claim_files (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    claim_id UUID NOT NULL REFERENCES claims(id) ON DELETE CASCADE,
    
    -- Файл
    file_name VARCHAR(255) NOT NULL,
    file_path VARCHAR(500) NOT NULL,
    file_size BIGINT,
    mime_type VARCHAR(100),
    file_type VARCHAR(50), -- 'passport', 'ticket', 'receipt', 'medical_doc', etc.
    
    -- S3 данные (если используется)
    s3_bucket VARCHAR(255),
    s3_key VARCHAR(500),
    s3_url TEXT,
    
    -- OCR/AI обработка
    ocr_status VARCHAR(50), -- 'pending', 'processing', 'completed', 'error'
    ocr_text TEXT,
    ai_extracted_data JSONB,
    
    -- Timestamps
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    processed_at TIMESTAMP WITH TIME ZONE
);

-- Индексы для claim_files
CREATE INDEX idx_claim_files_claim_id ON claim_files(claim_id);
CREATE INDEX idx_claim_files_file_type ON claim_files(file_type);
CREATE INDEX idx_claim_files_ocr_status ON claim_files(ocr_status);

-- ============================================
-- ТАБЛИЦА: processing_logs (Логи обработки)
-- ============================================
CREATE TABLE IF NOT EXISTS processing_logs (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    claim_id UUID REFERENCES claims(id) ON DELETE CASCADE,
    
    -- Лог
    level VARCHAR(20) NOT NULL, -- 'debug', 'info', 'warning', 'error', 'critical'
    message TEXT NOT NULL,
    context JSONB, -- дополнительный контекст
    
    -- Источник
    source VARCHAR(100), -- 'ocr_service', 'ai_service', 'flight_api', 'crm_integration', etc.
    function_name VARCHAR(200),
    
    -- Ошибки
    error_type VARCHAR(100),
    error_traceback TEXT,
    
    -- Timestamp
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
);

-- Индексы для processing_logs
CREATE INDEX idx_processing_logs_claim_id ON processing_logs(claim_id);
CREATE INDEX idx_processing_logs_level ON processing_logs(level);
CREATE INDEX idx_processing_logs_created_at ON processing_logs(created_at DESC);
CREATE INDEX idx_processing_logs_source ON processing_logs(source);

-- ============================================
-- ТАБЛИЦА: api_calls (Логи внешних API вызовов)
-- ============================================
CREATE TABLE IF NOT EXISTS api_calls (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    claim_id UUID REFERENCES claims(id) ON DELETE SET NULL,
    
    -- API детали
    api_name VARCHAR(100) NOT NULL, -- 'ocr_service', 'openrouter_ai', 'flightaware', 'nspk_banks', etc.
    endpoint VARCHAR(500),
    method VARCHAR(10), -- 'GET', 'POST', etc.
    
    -- Запрос
    request_headers JSONB,
    request_body JSONB,
    
    -- Ответ
    response_status INTEGER,
    response_headers JSONB,
    response_body JSONB,
    
    -- Производительность
    duration_ms INTEGER, -- длительность запроса в миллисекундах
    
    -- Результат
    success BOOLEAN DEFAULT FALSE,
    error_message TEXT,
    
    -- Timestamp
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
);

-- Индексы для api_calls
CREATE INDEX idx_api_calls_claim_id ON api_calls(claim_id);
CREATE INDEX idx_api_calls_api_name ON api_calls(api_name);
CREATE INDEX idx_api_calls_success ON api_calls(success);
CREATE INDEX idx_api_calls_created_at ON api_calls(created_at DESC);

-- ============================================
-- ТАБЛИЦА: queue_tasks (Задачи в очереди RabbitMQ)
-- ============================================
CREATE TABLE IF NOT EXISTS queue_tasks (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    claim_id UUID REFERENCES claims(id) ON DELETE CASCADE,
    
    -- Задача
    task_type VARCHAR(100) NOT NULL, -- 'ocr_processing', 'ai_extraction', 'flight_check', etc.
    queue_name VARCHAR(100) NOT NULL,
    priority INTEGER DEFAULT 5, -- 1-10, где 10 - максимальный приоритет
    
    -- Данные
    task_data JSONB,
    
    -- Статус
    status VARCHAR(50) NOT NULL DEFAULT 'pending', -- pending, processing, completed, failed, retry
    attempts INTEGER DEFAULT 0,
    max_attempts INTEGER DEFAULT 3,
    
    -- Результат
    result JSONB,
    error_message TEXT,
    
    -- Timestamps
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    started_at TIMESTAMP WITH TIME ZONE,
    completed_at TIMESTAMP WITH TIME ZONE,
    next_retry_at TIMESTAMP WITH TIME ZONE
);

-- Индексы для queue_tasks
CREATE INDEX idx_queue_tasks_claim_id ON queue_tasks(claim_id);
CREATE INDEX idx_queue_tasks_status ON queue_tasks(status);
CREATE INDEX idx_queue_tasks_task_type ON queue_tasks(task_type);
CREATE INDEX idx_queue_tasks_created_at ON queue_tasks(created_at DESC);
CREATE INDEX idx_queue_tasks_next_retry ON queue_tasks(next_retry_at) WHERE status = 'retry';

-- ============================================
-- ТАБЛИЦА: metrics (Метрики системы)
-- ============================================
CREATE TABLE IF NOT EXISTS metrics (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    
    -- Метрика
    metric_name VARCHAR(100) NOT NULL,
    metric_value NUMERIC(20, 4),
    metric_unit VARCHAR(50), -- 'ms', 'count', 'bytes', '%', etc.
    
    -- Теги для группировки
    tags JSONB,
    
    -- Timestamp
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
);

-- Индексы для metrics
CREATE INDEX idx_metrics_metric_name ON metrics(metric_name);
CREATE INDEX idx_metrics_created_at ON metrics(created_at DESC);
CREATE INDEX idx_metrics_tags_gin ON metrics USING gin(tags);

-- ============================================
-- ТАБЛИЦА: cache_entries (Кеш для редких запросов)
-- ============================================
CREATE TABLE IF NOT EXISTS cache_entries (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    
    -- Ключ-значение
    cache_key VARCHAR(255) UNIQUE NOT NULL,
    cache_value JSONB,
    
    -- TTL
    expires_at TIMESTAMP WITH TIME ZONE,
    
    -- Timestamps
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
);

-- Индексы для cache_entries
CREATE INDEX idx_cache_entries_key ON cache_entries(cache_key);
CREATE INDEX idx_cache_entries_expires ON cache_entries(expires_at);

-- Автоматическая очистка устаревшего кеша
CREATE OR REPLACE FUNCTION cleanup_expired_cache()
RETURNS void AS $$
BEGIN
    DELETE FROM cache_entries WHERE expires_at < CURRENT_TIMESTAMP;
END;
$$ LANGUAGE plpgsql;

-- ============================================
-- ТРИГГЕРЫ
-- ============================================

-- Автоматическое обновление updated_at для claims
CREATE OR REPLACE FUNCTION update_updated_at_column()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at = CURRENT_TIMESTAMP;
    RETURN NEW;
END;
$$ LANGUAGE plpgsql;

CREATE TRIGGER update_claims_updated_at
    BEFORE UPDATE ON claims
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

-- ============================================
-- ПРЕДСТАВЛЕНИЯ (VIEWS)
-- ============================================

-- Статистика по заявкам
CREATE OR REPLACE VIEW claims_statistics AS
SELECT
    DATE(created_at) as date,
    insurance_type,
    status,
    COUNT(*) as count,
    AVG(EXTRACT(EPOCH FROM (completed_at - created_at))) as avg_processing_time_seconds
FROM claims
GROUP BY DATE(created_at), insurance_type, status;

-- Статистика по API вызовам
CREATE OR REPLACE VIEW api_performance AS
SELECT
    api_name,
    DATE(created_at) as date,
    COUNT(*) as total_calls,
    SUM(CASE WHEN success THEN 1 ELSE 0 END) as successful_calls,
    AVG(duration_ms) as avg_duration_ms,
    MAX(duration_ms) as max_duration_ms
FROM api_calls
GROUP BY api_name, DATE(created_at);

-- ============================================
-- НАЧАЛЬНЫЕ ДАННЫЕ
-- ============================================

-- Можно добавить тестовые данные для разработки
-- INSERT INTO claims (claim_number, client_phone, insurance_type, status)
-- VALUES ('TEST-001', '+79001234567', 'erv_travel', 'draft');

-- Завершение
SELECT 'Database initialized successfully!' as message;