-- MySQL initial schema for OKR application
CREATE TABLE `User` (
    `id` INT NOT NULL AUTO_INCREMENT,
    `name` VARCHAR(191) NOT NULL,
    `username` VARCHAR(191) NOT NULL,
    `email` VARCHAR(191) NOT NULL,
    `passwordHash` VARCHAR(191) NOT NULL,
    `role` VARCHAR(191) NOT NULL,
    `createdAt` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
    `updatedAt` DATETIME(3) NOT NULL,
    PRIMARY KEY (`id`),
    UNIQUE INDEX `User_username_key`(`username`),
    UNIQUE INDEX `User_email_key`(`email`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

CREATE TABLE `Objective` (
    `id` INT NOT NULL AUTO_INCREMENT,
    `title` VARCHAR(191) NOT NULL,
    `description` VARCHAR(191) NULL,
    `ownerId` INT NOT NULL,
    `quarter` VARCHAR(191) NOT NULL,
    `status` VARCHAR(191) NOT NULL DEFAULT 'NOT_STARTED',
    `createdAt` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
    `updatedAt` DATETIME(3) NOT NULL,
    INDEX `Objective_ownerId_idx`(`ownerId`),
    INDEX `Objective_quarter_idx`(`quarter`),
    INDEX `Objective_status_idx`(`status`),
    PRIMARY KEY (`id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

CREATE TABLE `KeyResult` (
    `id` INT NOT NULL AUTO_INCREMENT,
    `objectiveId` INT NOT NULL,
    `title` VARCHAR(191) NOT NULL,
    `progress` INT NOT NULL DEFAULT 0,
    `startValue` INT NOT NULL,
    `targetValue` INT NOT NULL,
    `deadline` DATETIME(3) NOT NULL,
    `createdAt` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
    `updatedAt` DATETIME(3) NOT NULL,
    INDEX `KeyResult_objectiveId_idx`(`objectiveId`),
    PRIMARY KEY (`id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

CREATE TABLE `ProgressUpdate` (
    `id` INT NOT NULL AUTO_INCREMENT,
    `keyResultId` INT NOT NULL,
    `progress` INT NOT NULL,
    `comment` VARCHAR(191) NULL,
    `createdById` INT NOT NULL,
    `createdAt` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
    PRIMARY KEY (`id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

ALTER TABLE `Objective` ADD CONSTRAINT `Objective_ownerId_fkey`
    FOREIGN KEY (`ownerId`) REFERENCES `User`(`id`)
    ON DELETE RESTRICT ON UPDATE CASCADE;

ALTER TABLE `KeyResult` ADD CONSTRAINT `KeyResult_objectiveId_fkey`
    FOREIGN KEY (`objectiveId`) REFERENCES `Objective`(`id`)
    ON DELETE CASCADE ON UPDATE CASCADE;

ALTER TABLE `ProgressUpdate` ADD CONSTRAINT `ProgressUpdate_keyResultId_fkey`
    FOREIGN KEY (`keyResultId`) REFERENCES `KeyResult`(`id`)
    ON DELETE CASCADE ON UPDATE CASCADE;