-- CreateEnum
CREATE TYPE "RequisitionStatus" AS ENUM ('OPEN', 'SHORTLISTING', 'PROPOSING', 'INTERVIEWING', 'SELECTED', 'FILLED', 'CANCELLED');

-- CreateEnum
CREATE TYPE "RequisitionReason" AS ENUM ('NEW_VACANCY', 'REPLACEMENT', 'LEAVE', 'SIGN_OFF', 'END_OF_CONTRACT', 'OTHER');

-- CreateEnum
CREATE TYPE "ReliefRequestStatus" AS ENUM ('OPEN', 'CONVERTED', 'CANCELLED');

-- CreateEnum
CREATE TYPE "CrewActionType" AS ENUM ('REQUISITION_RAISED', 'REQUISITION_ADVANCED', 'REQUISITION_FILLED', 'REQUISITION_CANCELLED', 'RELIEF_REQUESTED', 'RELIEF_CONVERTED', 'RELIEF_CANCELLED');

-- CreateTable
CREATE TABLE "Requisition" (
    "id" TEXT NOT NULL,
    "code" TEXT NOT NULL,
    "status" "RequisitionStatus" NOT NULL DEFAULT 'OPEN',
    "reason" "RequisitionReason" NOT NULL DEFAULT 'NEW_VACANCY',
    "autoRaised" BOOLEAN NOT NULL DEFAULT false,
    "neededBy" TIMESTAMP(3),
    "notes" TEXT,
    "cancelledAt" TIMESTAMP(3),
    "cancellationReason" TEXT,
    "filledAt" TIMESTAMP(3),
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updatedAt" TIMESTAMP(3) NOT NULL,
    "rankId" TEXT NOT NULL,
    "vesselId" TEXT,
    "siteId" TEXT,
    "raisedById" TEXT,

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

-- CreateTable
CREATE TABLE "ReliefRequest" (
    "id" TEXT NOT NULL,
    "status" "ReliefRequestStatus" NOT NULL DEFAULT 'OPEN',
    "note" TEXT,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updatedAt" TIMESTAMP(3) NOT NULL,
    "rankId" TEXT NOT NULL,
    "vesselId" TEXT,
    "siteId" TEXT,
    "requestedById" TEXT NOT NULL,
    "convertedRequisitionId" TEXT,

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

-- CreateTable
CREATE TABLE "CrewAction" (
    "id" TEXT NOT NULL,
    "actionType" "CrewActionType" NOT NULL,
    "note" TEXT,
    "metadata" JSONB,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "actorId" TEXT,
    "requisitionId" TEXT,

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

-- CreateIndex
CREATE UNIQUE INDEX "Requisition_code_key" ON "Requisition"("code");

-- CreateIndex
CREATE UNIQUE INDEX "ReliefRequest_convertedRequisitionId_key" ON "ReliefRequest"("convertedRequisitionId");

-- AddForeignKey
ALTER TABLE "Requisition" ADD CONSTRAINT "Requisition_rankId_fkey" FOREIGN KEY ("rankId") REFERENCES "Rank"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "Requisition" ADD CONSTRAINT "Requisition_vesselId_fkey" FOREIGN KEY ("vesselId") REFERENCES "Vessel"("id") ON DELETE SET NULL ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "Requisition" ADD CONSTRAINT "Requisition_siteId_fkey" FOREIGN KEY ("siteId") REFERENCES "Site"("id") ON DELETE SET NULL ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "Requisition" ADD CONSTRAINT "Requisition_raisedById_fkey" FOREIGN KEY ("raisedById") REFERENCES "User"("id") ON DELETE SET NULL ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "ReliefRequest" ADD CONSTRAINT "ReliefRequest_rankId_fkey" FOREIGN KEY ("rankId") REFERENCES "Rank"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "ReliefRequest" ADD CONSTRAINT "ReliefRequest_vesselId_fkey" FOREIGN KEY ("vesselId") REFERENCES "Vessel"("id") ON DELETE SET NULL ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "ReliefRequest" ADD CONSTRAINT "ReliefRequest_siteId_fkey" FOREIGN KEY ("siteId") REFERENCES "Site"("id") ON DELETE SET NULL ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "ReliefRequest" ADD CONSTRAINT "ReliefRequest_requestedById_fkey" FOREIGN KEY ("requestedById") REFERENCES "User"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "ReliefRequest" ADD CONSTRAINT "ReliefRequest_convertedRequisitionId_fkey" FOREIGN KEY ("convertedRequisitionId") REFERENCES "Requisition"("id") ON DELETE SET NULL ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "CrewAction" ADD CONSTRAINT "CrewAction_actorId_fkey" FOREIGN KEY ("actorId") REFERENCES "User"("id") ON DELETE SET NULL ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "CrewAction" ADD CONSTRAINT "CrewAction_requisitionId_fkey" FOREIGN KEY ("requisitionId") REFERENCES "Requisition"("id") ON DELETE SET NULL ON UPDATE CASCADE;