-- CreateTable
CREATE TABLE `User` (
    `id` CHAR(36) NOT NULL,
    `username` VARCHAR(64) NOT NULL,
    `passwordHash` VARCHAR(255) NOT NULL,
    `baseCurrency` CHAR(3) NOT NULL DEFAULT 'CNY',
    `createdAt` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
    `updatedAt` DATETIME(3) NOT NULL,

    UNIQUE INDEX `User_username_key`(`username`),
    PRIMARY KEY (`id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

-- CreateTable
CREATE TABLE `Session` (
    `id` CHAR(64) NOT NULL,
    `userId` CHAR(36) NOT NULL,
    `expiresAt` DATETIME(3) NOT NULL,

    INDEX `Session_userId_idx`(`userId`),
    PRIMARY KEY (`id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

-- CreateTable
CREATE TABLE `Position` (
    `id` CHAR(36) NOT NULL,
    `userId` CHAR(36) NOT NULL,
    `kind` VARCHAR(16) NOT NULL,
    `side` VARCHAR(16) NOT NULL,
    `name` VARCHAR(100) NOT NULL,
    `category` VARCHAR(40) NOT NULL,
    `currency` CHAR(3) NOT NULL,
    `notes` TEXT NOT NULL,
    `archived` BOOLEAN NOT NULL DEFAULT false,
    `createdAt` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
    `updatedAt` DATETIME(3) NOT NULL,

    INDEX `Position_userId_kind_idx`(`userId`, `kind`),
    PRIMARY KEY (`id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

-- CreateTable
CREATE TABLE `Revision` (
    `id` CHAR(36) NOT NULL,
    `positionId` CHAR(36) NOT NULL,
    `amount` DECIMAL(24, 8) NOT NULL,
    `effectiveDate` DATE NOT NULL,
    `notes` TEXT NOT NULL,
    `reason` VARCHAR(20) NOT NULL,
    `createdAt` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
    `updatedAt` DATETIME(3) NOT NULL,

    UNIQUE INDEX `Revision_positionId_effectiveDate_key`(`positionId`, `effectiveDate`),
    PRIMARY KEY (`id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

-- CreateTable
CREATE TABLE `PositionLink` (
    `id` CHAR(36) NOT NULL,
    `sourceId` CHAR(36) NOT NULL,
    `targetId` CHAR(36) NOT NULL,

    UNIQUE INDEX `PositionLink_sourceId_targetId_key`(`sourceId`, `targetId`),
    PRIMARY KEY (`id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

-- CreateTable
CREATE TABLE `ExchangeRate` (
    `id` CHAR(36) NOT NULL,
    `userId` CHAR(36) NOT NULL,
    `currency` CHAR(3) NOT NULL,
    `baseCurrency` CHAR(3) NOT NULL,
    `date` DATE NOT NULL,
    `rate` DECIMAL(24, 12) NOT NULL,
    `source` VARCHAR(30) NOT NULL,

    UNIQUE INDEX `ExchangeRate_userId_currency_baseCurrency_date_key`(`userId`, `currency`, `baseCurrency`, `date`),
    PRIMARY KEY (`id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

-- AddForeignKey
ALTER TABLE `Session` ADD CONSTRAINT `Session_userId_fkey` FOREIGN KEY (`userId`) REFERENCES `User`(`id`) ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE `Position` ADD CONSTRAINT `Position_userId_fkey` FOREIGN KEY (`userId`) REFERENCES `User`(`id`) ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE `Revision` ADD CONSTRAINT `Revision_positionId_fkey` FOREIGN KEY (`positionId`) REFERENCES `Position`(`id`) ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE `PositionLink` ADD CONSTRAINT `PositionLink_sourceId_fkey` FOREIGN KEY (`sourceId`) REFERENCES `Position`(`id`) ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE `PositionLink` ADD CONSTRAINT `PositionLink_targetId_fkey` FOREIGN KEY (`targetId`) REFERENCES `Position`(`id`) ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE `ExchangeRate` ADD CONSTRAINT `ExchangeRate_userId_fkey` FOREIGN KEY (`userId`) REFERENCES `User`(`id`) ON DELETE CASCADE ON UPDATE CASCADE;