-- Shaurya WPI Index Factor schema
-- Apply with:  mysql -u root < sql/schema.sql

CREATE DATABASE IF NOT EXISTS `shaurya_index`
  DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

USE `shaurya_index`;

-- Commodities master (hierarchy)
CREATE TABLE IF NOT EXISTS `commodities` (
  `comm_code`    VARCHAR(20)  NOT NULL,
  `comm_name`    VARCHAR(255) NOT NULL,
  `level`        TINYINT      NOT NULL,         -- 2..6 (All=2, Section=2, A/B/C=3, a/b=4, a1/a2=5, leaf=6)
  `parent_code`  VARCHAR(20)  NULL,
  `comm_wt`      DECIMAL(10,4) NULL,
  `base_year`    VARCHAR(10)  NOT NULL DEFAULT '2011-12',
  `display_name` VARCHAR(300) NOT NULL,          -- "1101010107 - Ragi"
  `created_at`   DATETIME     NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `updated_at`   DATETIME     NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`comm_code`, `base_year`),
  KEY `idx_parent` (`parent_code`),
  KEY `idx_level`  (`level`),
  KEY `idx_name`   (`comm_name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- Monthly index values
CREATE TABLE IF NOT EXISTS `monthly_indices` (
  `id`              INT UNSIGNED NOT NULL AUTO_INCREMENT,
  `comm_code`       VARCHAR(20)  NOT NULL,
  `base_year`       VARCHAR(10)  NOT NULL DEFAULT '2011-12',
  `period_year`     SMALLINT     NOT NULL,
  `period_month`    TINYINT      NOT NULL,       -- 1..12
  `index_value`     DECIMAL(10,2) NULL,
  `is_provisional`  TINYINT(1)   NOT NULL DEFAULT 0,
  `upload_id`       INT UNSIGNED NULL,
  `updated_at`      DATETIME     NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_comm_period` (`comm_code`, `base_year`, `period_year`, `period_month`),
  KEY `idx_period` (`period_year`, `period_month`),
  KEY `idx_upload` (`upload_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- Upload audit log
CREATE TABLE IF NOT EXISTS `uploads` (
  `id`              INT UNSIGNED NOT NULL AUTO_INCREMENT,
  `filename`        VARCHAR(255) NOT NULL,
  `stored_path`     VARCHAR(500) NOT NULL,
  `size_bytes`      INT UNSIGNED NOT NULL,
  `base_year`       VARCHAR(10)  NOT NULL DEFAULT '2011-12',
  `commodities_seen`  INT UNSIGNED NOT NULL DEFAULT 0,
  `periods_seen`      INT UNSIGNED NOT NULL DEFAULT 0,
  `values_written`    INT UNSIGNED NOT NULL DEFAULT 0,
  `latest_period`   VARCHAR(10)  NULL,           -- "022026"
  `status`          VARCHAR(32)  NOT NULL DEFAULT 'pending',
  `notes`           TEXT         NULL,
  `uploaded_at`     DATETIME     NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `idx_uploaded_at` (`uploaded_at`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;