-- CreateEnum
CREATE TYPE "UserRole" AS ENUM ('ADMIN', 'MANAGER', 'STAFF', 'VIEWER');

-- CreateEnum
CREATE TYPE "UserStatus" AS ENUM ('INVITED', 'ACTIVE', 'SUSPENDED', 'DISABLED');

-- CreateEnum
CREATE TYPE "PersonDepartment" AS ENUM ('IT', 'ENGINEERING', 'LOGISTICS', 'TRAFFIC', 'DRIVER', 'ADMINISTRATION', 'SALES', 'OTHER');

-- CreateEnum
CREATE TYPE "ItemTrackingType" AS ENUM ('QUANTITY', 'SERIALIZED');

-- CreateEnum
CREATE TYPE "ItemStatus" AS ENUM ('ACTIVE', 'DISCONTINUED', 'ARCHIVED');

-- CreateEnum
CREATE TYPE "AssetStatus" AS ENUM ('AVAILABLE', 'ASSIGNED', 'IN_REPAIR', 'BROKEN', 'LOST', 'STOLEN', 'DISPOSED', 'RETIRED');

-- CreateEnum
CREATE TYPE "AssignmentStatus" AS ENUM ('OPEN', 'PARTIALLY_RETURNED', 'RETURNED', 'CANCELLED');

-- CreateEnum
CREATE TYPE "InventoryMovementType" AS ENUM ('RECEIPT', 'ISSUE', 'ASSIGNMENT', 'RETURN', 'ADJUSTMENT', 'STATUS_CHANGE', 'DISPOSAL', 'INITIAL_LOAD');

-- CreateEnum
CREATE TYPE "InventoryMovementReason" AS ENUM ('PURCHASE', 'MANUAL_ENTRY', 'EMPLOYEE_ASSIGNMENT', 'EMPLOYEE_RETURN', 'INVENTORY_CORRECTION', 'DAMAGE', 'REPAIR', 'REPAIR_RETURN', 'LOSS', 'THEFT', 'DISPOSAL', 'INITIAL_LOAD', 'OTHER');

-- CreateEnum
CREATE TYPE "StockAlertStatus" AS ENUM ('OPEN', 'ACKNOWLEDGED', 'RESOLVED');

-- CreateEnum
CREATE TYPE "StockAlertTrigger" AS ENUM ('BELOW_MINIMUM', 'OUT_OF_STOCK');

-- CreateTable
CREATE TABLE "User" (
    "id" UUID NOT NULL,
    "name" TEXT NOT NULL,
    "email" TEXT NOT NULL,
    "emailNormalized" TEXT NOT NULL,
    "passwordHash" TEXT,
    "role" "UserRole" NOT NULL DEFAULT 'STAFF',
    "status" "UserStatus" NOT NULL DEFAULT 'INVITED',
    "deletedAt" TIMESTAMP(3),
    "invitedAt" TIMESTAMP(3),
    "activatedAt" TIMESTAMP(3),
    "passwordChangedAt" TIMESTAMP(3),
    "lastLoginAt" TIMESTAMP(3),
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updatedAt" TIMESTAMP(3) NOT NULL,

    CONSTRAINT "User_pkey" PRIMARY KEY ("id")
);

-- CreateTable
CREATE TABLE "UserInvitation" (
    "id" UUID NOT NULL,
    "userId" UUID NOT NULL,
    "tokenHash" TEXT NOT NULL,
    "invitedById" UUID NOT NULL,
    "email" TEXT NOT NULL,
    "expiresAt" TIMESTAMP(3) NOT NULL,
    "acceptedAt" TIMESTAMP(3),
    "revokedAt" TIMESTAMP(3),
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

    CONSTRAINT "UserInvitation_pkey" PRIMARY KEY ("id")
);

-- CreateTable
CREATE TABLE "Person" (
    "id" UUID NOT NULL,
    "firstName" TEXT NOT NULL,
    "lastName" TEXT NOT NULL,
    "department" "PersonDepartment",
    "email" TEXT,
    "phone" TEXT,
    "userId" UUID,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updatedAt" TIMESTAMP(3) NOT NULL,
    "deletedAt" TIMESTAMP(3),

    CONSTRAINT "Person_pkey" PRIMARY KEY ("id")
);

-- CreateTable
CREATE TABLE "Category" (
    "id" UUID NOT NULL,
    "name" TEXT NOT NULL,
    "description" TEXT,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updatedAt" TIMESTAMP(3) NOT NULL,
    "deletedAt" TIMESTAMP(3),

    CONSTRAINT "Category_pkey" PRIMARY KEY ("id")
);

-- CreateTable
CREATE TABLE "Item" (
    "id" UUID NOT NULL,
    "sku" TEXT NOT NULL,
    "name" TEXT NOT NULL,
    "description" TEXT,
    "trackingType" "ItemTrackingType" NOT NULL,
    "status" "ItemStatus" NOT NULL DEFAULT 'ACTIVE',
    "categoryId" UUID NOT NULL,
    "stock" INTEGER NOT NULL DEFAULT 0,
    "minStock" INTEGER,
    "targetStock" INTEGER,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updatedAt" TIMESTAMP(3) NOT NULL,
    "deletedAt" TIMESTAMP(3),

    CONSTRAINT "Item_pkey" PRIMARY KEY ("id")
);

-- CreateTable
CREATE TABLE "Asset" (
    "id" UUID NOT NULL,
    "assetTag" TEXT,
    "serialNumber" TEXT NOT NULL,
    "itemId" UUID NOT NULL,
    "status" "AssetStatus" NOT NULL DEFAULT 'AVAILABLE',
    "manufacturer" TEXT,
    "model" TEXT,
    "deliveryNote" TEXT,
    "invoiceNumber" TEXT,
    "purchaseDate" TIMESTAMP(3),
    "purchasePrice" DECIMAL(12,2),
    "warrantyEndsAt" TIMESTAMP(3),
    "notes" TEXT,
    "retiredAt" TIMESTAMP(3),
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updatedAt" TIMESTAMP(3) NOT NULL,
    "deletedAt" TIMESTAMP(3),

    CONSTRAINT "Asset_pkey" PRIMARY KEY ("id")
);

-- CreateTable
CREATE TABLE "Assignment" (
    "id" UUID NOT NULL,
    "personId" UUID NOT NULL,
    "status" "AssignmentStatus" NOT NULL DEFAULT 'OPEN',
    "assignedAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "dueAt" TIMESTAMP(3),
    "closedAt" TIMESTAMP(3),
    "notes" TEXT,
    "createdById" UUID NOT NULL,
    "closedById" UUID,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updatedAt" TIMESTAMP(3) NOT NULL,

    CONSTRAINT "Assignment_pkey" PRIMARY KEY ("id")
);

-- CreateTable
CREATE TABLE "AssignmentStockLine" (
    "id" UUID NOT NULL,
    "assignmentId" UUID NOT NULL,
    "itemId" UUID NOT NULL,
    "quantity" INTEGER NOT NULL,
    "returnedQuantity" INTEGER NOT NULL DEFAULT 0,
    "notes" TEXT,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updatedAt" TIMESTAMP(3) NOT NULL,

    CONSTRAINT "AssignmentStockLine_pkey" PRIMARY KEY ("id")
);

-- CreateTable
CREATE TABLE "AssignmentStockReturn" (
    "id" UUID NOT NULL,
    "assignmentLineId" UUID NOT NULL,
    "quantity" INTEGER NOT NULL,
    "returnedAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "receivedById" UUID NOT NULL,
    "notes" TEXT,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

    CONSTRAINT "AssignmentStockReturn_pkey" PRIMARY KEY ("id")
);

-- CreateTable
CREATE TABLE "AssignmentAssetLine" (
    "id" UUID NOT NULL,
    "assignmentId" UUID NOT NULL,
    "assetId" UUID NOT NULL,
    "assignedAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "returnedAt" TIMESTAMP(3),
    "returnedById" UUID,
    "returnStatus" "AssetStatus",
    "notes" TEXT,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updatedAt" TIMESTAMP(3) NOT NULL,

    CONSTRAINT "AssignmentAssetLine_pkey" PRIMARY KEY ("id")
);

-- CreateTable
CREATE TABLE "InventoryMovement" (
    "id" UUID NOT NULL,
    "type" "InventoryMovementType" NOT NULL,
    "reason" "InventoryMovementReason" NOT NULL,
    "assignmentId" UUID,
    "reference" TEXT,
    "details" TEXT,
    "notes" TEXT,
    "performedById" UUID NOT NULL,
    "occurredAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

    CONSTRAINT "InventoryMovement_pkey" PRIMARY KEY ("id")
);

-- CreateTable
CREATE TABLE "StockMovementLine" (
    "id" UUID NOT NULL,
    "movementId" UUID NOT NULL,
    "itemId" UUID NOT NULL,
    "stockDelta" INTEGER NOT NULL,
    "previousStock" INTEGER NOT NULL,
    "newStock" INTEGER NOT NULL,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

    CONSTRAINT "StockMovementLine_pkey" PRIMARY KEY ("id")
);

-- CreateTable
CREATE TABLE "AssetMovementLine" (
    "id" UUID NOT NULL,
    "movementId" UUID NOT NULL,
    "assetId" UUID NOT NULL,
    "previousStatus" "AssetStatus",
    "newStatus" "AssetStatus" NOT NULL,
    "notes" TEXT,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

    CONSTRAINT "AssetMovementLine_pkey" PRIMARY KEY ("id")
);

-- CreateTable
CREATE TABLE "StockAlert" (
    "id" UUID NOT NULL,
    "itemId" UUID NOT NULL,
    "trigger" "StockAlertTrigger" NOT NULL,
    "status" "StockAlertStatus" NOT NULL DEFAULT 'OPEN',
    "availableStock" INTEGER NOT NULL,
    "minimumStock" INTEGER NOT NULL,
    "suggestedPurchase" INTEGER,
    "triggeredAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "acknowledgedAt" TIMESTAMP(3),
    "acknowledgedById" UUID,
    "resolvedAt" TIMESTAMP(3),
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updatedAt" TIMESTAMP(3) NOT NULL,

    CONSTRAINT "StockAlert_pkey" PRIMARY KEY ("id")
);

-- CreateIndex
CREATE UNIQUE INDEX "User_emailNormalized_key" ON "User"("emailNormalized");

-- CreateIndex
CREATE INDEX "User_status_idx" ON "User"("status");

-- CreateIndex
CREATE INDEX "User_deletedAt_idx" ON "User"("deletedAt");

-- CreateIndex
CREATE INDEX "User_createdAt_idx" ON "User"("createdAt");

-- CreateIndex
CREATE UNIQUE INDEX "UserInvitation_tokenHash_key" ON "UserInvitation"("tokenHash");

-- CreateIndex
CREATE INDEX "UserInvitation_userId_idx" ON "UserInvitation"("userId");

-- CreateIndex
CREATE INDEX "UserInvitation_expiresAt_idx" ON "UserInvitation"("expiresAt");

-- CreateIndex
CREATE INDEX "UserInvitation_acceptedAt_idx" ON "UserInvitation"("acceptedAt");

-- CreateIndex
CREATE INDEX "UserInvitation_revokedAt_idx" ON "UserInvitation"("revokedAt");

-- CreateIndex
CREATE UNIQUE INDEX "Person_userId_key" ON "Person"("userId");

-- CreateIndex
CREATE INDEX "Person_lastName_firstName_idx" ON "Person"("lastName", "firstName");

-- CreateIndex
CREATE INDEX "Person_department_deletedAt_idx" ON "Person"("department", "deletedAt");

-- CreateIndex
CREATE INDEX "Person_deletedAt_idx" ON "Person"("deletedAt");

-- CreateIndex
CREATE UNIQUE INDEX "Category_name_key" ON "Category"("name");

-- CreateIndex
CREATE INDEX "Category_deletedAt_idx" ON "Category"("deletedAt");

-- CreateIndex
CREATE UNIQUE INDEX "Item_sku_key" ON "Item"("sku");

-- CreateIndex
CREATE INDEX "Item_categoryId_status_idx" ON "Item"("categoryId", "status");

-- CreateIndex
CREATE INDEX "Item_trackingType_status_idx" ON "Item"("trackingType", "status");

-- CreateIndex
CREATE INDEX "Item_name_idx" ON "Item"("name");

-- CreateIndex
CREATE INDEX "Item_deletedAt_idx" ON "Item"("deletedAt");

-- CreateIndex
CREATE UNIQUE INDEX "Asset_assetTag_key" ON "Asset"("assetTag");

-- CreateIndex
CREATE UNIQUE INDEX "Asset_serialNumber_key" ON "Asset"("serialNumber");

-- CreateIndex
CREATE INDEX "Asset_itemId_status_idx" ON "Asset"("itemId", "status");

-- CreateIndex
CREATE INDEX "Asset_status_idx" ON "Asset"("status");

-- CreateIndex
CREATE INDEX "Asset_createdAt_idx" ON "Asset"("createdAt");

-- CreateIndex
CREATE INDEX "Asset_deletedAt_idx" ON "Asset"("deletedAt");

-- CreateIndex
CREATE INDEX "Assignment_personId_status_idx" ON "Assignment"("personId", "status");

-- CreateIndex
CREATE INDEX "Assignment_personId_assignedAt_idx" ON "Assignment"("personId", "assignedAt");

-- CreateIndex
CREATE INDEX "Assignment_status_assignedAt_idx" ON "Assignment"("status", "assignedAt");

-- CreateIndex
CREATE INDEX "Assignment_dueAt_idx" ON "Assignment"("dueAt");

-- CreateIndex
CREATE INDEX "Assignment_createdById_createdAt_idx" ON "Assignment"("createdById", "createdAt");

-- CreateIndex
CREATE INDEX "AssignmentStockLine_assignmentId_idx" ON "AssignmentStockLine"("assignmentId");

-- CreateIndex
CREATE INDEX "AssignmentStockLine_itemId_createdAt_idx" ON "AssignmentStockLine"("itemId", "createdAt");

-- CreateIndex
CREATE INDEX "AssignmentStockReturn_assignmentLineId_returnedAt_idx" ON "AssignmentStockReturn"("assignmentLineId", "returnedAt");

-- CreateIndex
CREATE INDEX "AssignmentStockReturn_receivedById_returnedAt_idx" ON "AssignmentStockReturn"("receivedById", "returnedAt");

-- CreateIndex
CREATE INDEX "AssignmentAssetLine_assignmentId_idx" ON "AssignmentAssetLine"("assignmentId");

-- CreateIndex
CREATE INDEX "AssignmentAssetLine_assetId_assignedAt_idx" ON "AssignmentAssetLine"("assetId", "assignedAt");

-- CreateIndex
CREATE INDEX "AssignmentAssetLine_returnedAt_idx" ON "AssignmentAssetLine"("returnedAt");

-- CreateIndex
CREATE INDEX "InventoryMovement_type_occurredAt_idx" ON "InventoryMovement"("type", "occurredAt");

-- CreateIndex
CREATE INDEX "InventoryMovement_reason_occurredAt_idx" ON "InventoryMovement"("reason", "occurredAt");

-- CreateIndex
CREATE INDEX "InventoryMovement_assignmentId_idx" ON "InventoryMovement"("assignmentId");

-- CreateIndex
CREATE INDEX "InventoryMovement_performedById_occurredAt_idx" ON "InventoryMovement"("performedById", "occurredAt");

-- CreateIndex
CREATE INDEX "InventoryMovement_occurredAt_idx" ON "InventoryMovement"("occurredAt");

-- CreateIndex
CREATE INDEX "StockMovementLine_movementId_idx" ON "StockMovementLine"("movementId");

-- CreateIndex
CREATE INDEX "StockMovementLine_itemId_createdAt_idx" ON "StockMovementLine"("itemId", "createdAt");

-- CreateIndex
CREATE INDEX "AssetMovementLine_assetId_createdAt_idx" ON "AssetMovementLine"("assetId", "createdAt");

-- CreateIndex
CREATE UNIQUE INDEX "AssetMovementLine_movementId_assetId_key" ON "AssetMovementLine"("movementId", "assetId");

-- CreateIndex
CREATE INDEX "StockAlert_itemId_status_idx" ON "StockAlert"("itemId", "status");

-- CreateIndex
CREATE INDEX "StockAlert_status_triggeredAt_idx" ON "StockAlert"("status", "triggeredAt");

-- CreateIndex
CREATE INDEX "StockAlert_trigger_triggeredAt_idx" ON "StockAlert"("trigger", "triggeredAt");

-- AddForeignKey
ALTER TABLE "UserInvitation" ADD CONSTRAINT "UserInvitation_userId_fkey" FOREIGN KEY ("userId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "UserInvitation" ADD CONSTRAINT "UserInvitation_invitedById_fkey" FOREIGN KEY ("invitedById") REFERENCES "User"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "Person" ADD CONSTRAINT "Person_userId_fkey" FOREIGN KEY ("userId") REFERENCES "User"("id") ON DELETE SET NULL ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "Item" ADD CONSTRAINT "Item_categoryId_fkey" FOREIGN KEY ("categoryId") REFERENCES "Category"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "Asset" ADD CONSTRAINT "Asset_itemId_fkey" FOREIGN KEY ("itemId") REFERENCES "Item"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "Assignment" ADD CONSTRAINT "Assignment_personId_fkey" FOREIGN KEY ("personId") REFERENCES "Person"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "Assignment" ADD CONSTRAINT "Assignment_createdById_fkey" FOREIGN KEY ("createdById") REFERENCES "User"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "Assignment" ADD CONSTRAINT "Assignment_closedById_fkey" FOREIGN KEY ("closedById") REFERENCES "User"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "AssignmentStockLine" ADD CONSTRAINT "AssignmentStockLine_assignmentId_fkey" FOREIGN KEY ("assignmentId") REFERENCES "Assignment"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "AssignmentStockLine" ADD CONSTRAINT "AssignmentStockLine_itemId_fkey" FOREIGN KEY ("itemId") REFERENCES "Item"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "AssignmentStockReturn" ADD CONSTRAINT "AssignmentStockReturn_assignmentLineId_fkey" FOREIGN KEY ("assignmentLineId") REFERENCES "AssignmentStockLine"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "AssignmentStockReturn" ADD CONSTRAINT "AssignmentStockReturn_receivedById_fkey" FOREIGN KEY ("receivedById") REFERENCES "User"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "AssignmentAssetLine" ADD CONSTRAINT "AssignmentAssetLine_assignmentId_fkey" FOREIGN KEY ("assignmentId") REFERENCES "Assignment"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "AssignmentAssetLine" ADD CONSTRAINT "AssignmentAssetLine_assetId_fkey" FOREIGN KEY ("assetId") REFERENCES "Asset"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "AssignmentAssetLine" ADD CONSTRAINT "AssignmentAssetLine_returnedById_fkey" FOREIGN KEY ("returnedById") REFERENCES "User"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "InventoryMovement" ADD CONSTRAINT "InventoryMovement_assignmentId_fkey" FOREIGN KEY ("assignmentId") REFERENCES "Assignment"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "InventoryMovement" ADD CONSTRAINT "InventoryMovement_performedById_fkey" FOREIGN KEY ("performedById") REFERENCES "User"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "StockMovementLine" ADD CONSTRAINT "StockMovementLine_movementId_fkey" FOREIGN KEY ("movementId") REFERENCES "InventoryMovement"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "StockMovementLine" ADD CONSTRAINT "StockMovementLine_itemId_fkey" FOREIGN KEY ("itemId") REFERENCES "Item"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "AssetMovementLine" ADD CONSTRAINT "AssetMovementLine_movementId_fkey" FOREIGN KEY ("movementId") REFERENCES "InventoryMovement"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "AssetMovementLine" ADD CONSTRAINT "AssetMovementLine_assetId_fkey" FOREIGN KEY ("assetId") REFERENCES "Asset"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "StockAlert" ADD CONSTRAINT "StockAlert_itemId_fkey" FOREIGN KEY ("itemId") REFERENCES "Item"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "StockAlert" ADD CONSTRAINT "StockAlert_acknowledgedById_fkey" FOREIGN KEY ("acknowledgedById") REFERENCES "User"("id") ON DELETE SET NULL ON UPDATE CASCADE;


-- =====================================================
-- USER INVITATION / ACTIVATION
-- =====================================================

ALTER TABLE "User"
ADD CONSTRAINT "User_invited_without_password"
CHECK (
  "status" <> 'INVITED'
  OR "passwordHash" IS NULL
);

ALTER TABLE "User"
ADD CONSTRAINT "User_active_requires_password"
CHECK (
  "status" <> 'ACTIVE'
  OR "passwordHash" IS NOT NULL
);

ALTER TABLE "User"
ADD CONSTRAINT "User_active_requires_activation_date"
CHECK (
  "status" <> 'ACTIVE'
  OR "activatedAt" IS NOT NULL
);

ALTER TABLE "User"
ADD CONSTRAINT "User_activation_date_after_invitation"
CHECK (
  "activatedAt" IS NULL
  OR "invitedAt" IS NULL
  OR "activatedAt" >= "invitedAt"
);

ALTER TABLE "User"
ADD CONSTRAINT "User_password_changed_after_invitation"
CHECK (
  "passwordChangedAt" IS NULL
  OR "invitedAt" IS NULL
  OR "passwordChangedAt" >= "invitedAt"
);

ALTER TABLE "UserInvitation"
ADD CONSTRAINT "UserInvitation_expiry_after_creation"
CHECK ("expiresAt" > "createdAt");

ALTER TABLE "UserInvitation"
ADD CONSTRAINT "UserInvitation_accepted_or_revoked"
CHECK (
  "acceptedAt" IS NULL
  OR "revokedAt" IS NULL
);

ALTER TABLE "UserInvitation"
ADD CONSTRAINT "UserInvitation_accepted_after_creation"
CHECK (
  "acceptedAt" IS NULL
  OR "acceptedAt" >= "createdAt"
);

ALTER TABLE "UserInvitation"
ADD CONSTRAINT "UserInvitation_revoked_after_creation"
CHECK (
  "revokedAt" IS NULL
  OR "revokedAt" >= "createdAt"
);

CREATE UNIQUE INDEX "UserInvitation_active_user_key"
ON "UserInvitation" ("userId")
WHERE "acceptedAt" IS NULL
  AND "revokedAt" IS NULL;


-- =====================================================
-- ITEM STOCK
-- =====================================================

ALTER TABLE "Item"
ADD CONSTRAINT "Item_stock_non_negative"
CHECK ("stock" >= 0);

ALTER TABLE "Item"
ADD CONSTRAINT "Item_min_stock_non_negative"
CHECK (
  "minStock" IS NULL
  OR "minStock" >= 0
);

ALTER TABLE "Item"
ADD CONSTRAINT "Item_target_stock_non_negative"
CHECK (
  "targetStock" IS NULL
  OR "targetStock" >= 0
);

ALTER TABLE "Item"
ADD CONSTRAINT "Item_target_not_below_minimum"
CHECK (
  "minStock" IS NULL
  OR "targetStock" IS NULL
  OR "targetStock" >= "minStock"
);

ALTER TABLE "Item"
ADD CONSTRAINT "Item_serialized_stock_zero"
CHECK (
  "trackingType" <> 'SERIALIZED'
  OR "stock" = 0
);


-- =====================================================
-- ASSET DATA
-- =====================================================

ALTER TABLE "Asset"
ADD CONSTRAINT "Asset_purchase_price_non_negative"
CHECK (
  "purchasePrice" IS NULL
  OR "purchasePrice" >= 0
);

ALTER TABLE "Asset"
ADD CONSTRAINT "Asset_warranty_date_valid"
CHECK (
  "warrantyEndsAt" IS NULL
  OR "purchaseDate" IS NULL
  OR "warrantyEndsAt" >= "purchaseDate"
);

ALTER TABLE "Asset"
ADD CONSTRAINT "Asset_retired_date_valid"
CHECK (
  "retiredAt" IS NULL
  OR "retiredAt" >= "createdAt"
);


-- =====================================================
-- ASSIGNMENTS
-- =====================================================

ALTER TABLE "Assignment"
ADD CONSTRAINT "Assignment_due_date_valid"
CHECK (
  "dueAt" IS NULL
  OR "dueAt" >= "assignedAt"
);

ALTER TABLE "Assignment"
ADD CONSTRAINT "Assignment_closed_date_valid"
CHECK (
  "closedAt" IS NULL
  OR "closedAt" >= "assignedAt"
);


-- =====================================================
-- QUANTITY ASSIGNMENTS
-- =====================================================

ALTER TABLE "AssignmentStockLine"
ADD CONSTRAINT "AssignmentStockLine_quantity_positive"
CHECK ("quantity" > 0);

ALTER TABLE "AssignmentStockLine"
ADD CONSTRAINT "AssignmentStockLine_returned_non_negative"
CHECK ("returnedQuantity" >= 0);

ALTER TABLE "AssignmentStockLine"
ADD CONSTRAINT "AssignmentStockLine_returned_not_greater"
CHECK ("returnedQuantity" <= "quantity");

ALTER TABLE "AssignmentStockReturn"
ADD CONSTRAINT "AssignmentStockReturn_quantity_positive"
CHECK ("quantity" > 0);


-- =====================================================
-- SERIALIZED ASSET ASSIGNMENTS
-- =====================================================

ALTER TABLE "AssignmentAssetLine"
ADD CONSTRAINT "AssignmentAssetLine_return_date_valid"
CHECK (
  "returnedAt" IS NULL
  OR "returnedAt" >= "assignedAt"
);

ALTER TABLE "AssignmentAssetLine"
ADD CONSTRAINT "AssignmentAssetLine_return_data_consistent"
CHECK (
  (
    "returnedAt" IS NULL
    AND "returnedById" IS NULL
    AND "returnStatus" IS NULL
  )
  OR
  (
    "returnedAt" IS NOT NULL
    AND "returnedById" IS NOT NULL
    AND "returnStatus" IS NOT NULL
  )
);

CREATE UNIQUE INDEX "AssignmentAssetLine_active_asset_key"
ON "AssignmentAssetLine" ("assetId")
WHERE "returnedAt" IS NULL;


-- =====================================================
-- STOCK MOVEMENTS
-- =====================================================

ALTER TABLE "StockMovementLine"
ADD CONSTRAINT "StockMovementLine_stock_consistency"
CHECK (
  "newStock" = "previousStock" + "stockDelta"
);

ALTER TABLE "StockMovementLine"
ADD CONSTRAINT "StockMovementLine_previous_stock_non_negative"
CHECK ("previousStock" >= 0);

ALTER TABLE "StockMovementLine"
ADD CONSTRAINT "StockMovementLine_new_stock_non_negative"
CHECK ("newStock" >= 0);

ALTER TABLE "StockMovementLine"
ADD CONSTRAINT "StockMovementLine_delta_not_zero"
CHECK ("stockDelta" <> 0);


-- =====================================================
-- STOCK ALERTS
-- =====================================================

ALTER TABLE "StockAlert"
ADD CONSTRAINT "StockAlert_available_stock_non_negative"
CHECK ("availableStock" >= 0);

ALTER TABLE "StockAlert"
ADD CONSTRAINT "StockAlert_minimum_stock_non_negative"
CHECK ("minimumStock" >= 0);

ALTER TABLE "StockAlert"
ADD CONSTRAINT "StockAlert_suggested_purchase_non_negative"
CHECK (
  "suggestedPurchase" IS NULL
  OR "suggestedPurchase" >= 0
);

ALTER TABLE "StockAlert"
ADD CONSTRAINT "StockAlert_acknowledgement_consistent"
CHECK (
  (
    "acknowledgedAt" IS NULL
    AND "acknowledgedById" IS NULL
  )
  OR
  (
    "acknowledgedAt" IS NOT NULL
    AND "acknowledgedById" IS NOT NULL
  )
);

ALTER TABLE "StockAlert"
ADD CONSTRAINT "StockAlert_resolution_date_valid"
CHECK (
  "resolvedAt" IS NULL
  OR "resolvedAt" >= "triggeredAt"
);

CREATE UNIQUE INDEX "StockAlert_active_item_trigger_key"
ON "StockAlert" ("itemId", "trigger")
WHERE "status" IN ('OPEN', 'ACKNOWLEDGED');