-- AlterTable: Add attendancePin to employees
ALTER TABLE "employees" ADD COLUMN IF NOT EXISTS "attendancePin" TEXT;

-- CreateIndex (unique) on attendancePin - only if column added
CREATE UNIQUE INDEX IF NOT EXISTS "employees_attendancePin_key" ON "employees"("attendancePin");

-- AlterTable: Add ZK Tico fields to attendances
ALTER TABLE "attendances" ADD COLUMN IF NOT EXISTS "sourceDeviceId" TEXT;
ALTER TABLE "attendances" ADD COLUMN IF NOT EXISTS "externalId" TEXT;
ALTER TABLE "attendances" ADD COLUMN IF NOT EXISTS "rawData" JSONB;

-- CreateIndex on sourceDeviceId
CREATE INDEX IF NOT EXISTS "attendances_sourceDeviceId_idx" ON "attendances"("sourceDeviceId");

-- CreateTable: loans
CREATE TABLE "loans" (
    "id" TEXT NOT NULL,
    "employeeId" TEXT NOT NULL,
    "loanNumber" TEXT NOT NULL,
    "type" TEXT NOT NULL,
    "amount" DECIMAL(12,2) NOT NULL,
    "currency" TEXT NOT NULL DEFAULT 'SAR',
    "installments" INTEGER NOT NULL DEFAULT 1,
    "monthlyAmount" DECIMAL(12,2),
    "reason" TEXT,
    "status" TEXT NOT NULL DEFAULT 'PENDING',
    "approvedBy" TEXT,
    "approvedAt" TIMESTAMP(3),
    "rejectedReason" TEXT,
    "startDate" DATE,
    "endDate" DATE,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updatedAt" TIMESTAMP(3) NOT NULL,

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

-- CreateTable: loan_installments
CREATE TABLE "loan_installments" (
    "id" TEXT NOT NULL,
    "loanId" TEXT NOT NULL,
    "installmentNumber" INTEGER NOT NULL,
    "dueDate" DATE NOT NULL,
    "amount" DECIMAL(12,2) NOT NULL,
    "paidDate" DATE,
    "status" TEXT NOT NULL DEFAULT 'PENDING',
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updatedAt" TIMESTAMP(3) NOT NULL,

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

-- CreateTable: purchase_requests
CREATE TABLE "purchase_requests" (
    "id" TEXT NOT NULL,
    "requestNumber" TEXT NOT NULL,
    "employeeId" TEXT NOT NULL,
    "items" JSONB NOT NULL,
    "totalAmount" DECIMAL(12,2),
    "reason" TEXT,
    "priority" TEXT NOT NULL DEFAULT 'NORMAL',
    "status" TEXT NOT NULL DEFAULT 'PENDING',
    "approvedBy" TEXT,
    "approvedAt" TIMESTAMP(3),
    "rejectedReason" TEXT,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updatedAt" TIMESTAMP(3) NOT NULL,

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

-- CreateTable: leave_entitlements
CREATE TABLE "leave_entitlements" (
    "id" TEXT NOT NULL,
    "employeeId" TEXT NOT NULL,
    "year" INTEGER NOT NULL,
    "leaveType" TEXT NOT NULL,
    "totalDays" INTEGER NOT NULL DEFAULT 0,
    "usedDays" INTEGER NOT NULL DEFAULT 0,
    "carriedOver" INTEGER NOT NULL DEFAULT 0,
    "notes" TEXT,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updatedAt" TIMESTAMP(3) NOT NULL,

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

-- CreateTable: employee_contracts
CREATE TABLE "employee_contracts" (
    "id" TEXT NOT NULL,
    "employeeId" TEXT NOT NULL,
    "contractNumber" TEXT NOT NULL,
    "type" TEXT NOT NULL,
    "startDate" DATE NOT NULL,
    "endDate" DATE,
    "salary" DECIMAL(12,2) NOT NULL,
    "currency" TEXT NOT NULL DEFAULT 'SAR',
    "documentUrl" TEXT,
    "status" TEXT NOT NULL DEFAULT 'ACTIVE',
    "notes" TEXT,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updatedAt" TIMESTAMP(3) NOT NULL,

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

-- CreateIndex
CREATE UNIQUE INDEX "loans_loanNumber_key" ON "loans"("loanNumber");
CREATE INDEX "loans_employeeId_idx" ON "loans"("employeeId");
CREATE INDEX "loans_status_idx" ON "loans"("status");

CREATE UNIQUE INDEX "loan_installments_loanId_installmentNumber_key" ON "loan_installments"("loanId", "installmentNumber");
CREATE INDEX "loan_installments_loanId_idx" ON "loan_installments"("loanId");

CREATE UNIQUE INDEX "purchase_requests_requestNumber_key" ON "purchase_requests"("requestNumber");
CREATE INDEX "purchase_requests_employeeId_idx" ON "purchase_requests"("employeeId");
CREATE INDEX "purchase_requests_status_idx" ON "purchase_requests"("status");

CREATE UNIQUE INDEX "leave_entitlements_employeeId_year_leaveType_key" ON "leave_entitlements"("employeeId", "year", "leaveType");
CREATE INDEX "leave_entitlements_employeeId_idx" ON "leave_entitlements"("employeeId");

CREATE UNIQUE INDEX "employee_contracts_contractNumber_key" ON "employee_contracts"("contractNumber");
CREATE INDEX "employee_contracts_employeeId_idx" ON "employee_contracts"("employeeId");
CREATE INDEX "employee_contracts_status_idx" ON "employee_contracts"("status");

-- AddForeignKey
ALTER TABLE "loans" ADD CONSTRAINT "loans_employeeId_fkey" FOREIGN KEY ("employeeId") REFERENCES "employees"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
ALTER TABLE "loan_installments" ADD CONSTRAINT "loan_installments_loanId_fkey" FOREIGN KEY ("loanId") REFERENCES "loans"("id") ON DELETE CASCADE ON UPDATE CASCADE;
ALTER TABLE "purchase_requests" ADD CONSTRAINT "purchase_requests_employeeId_fkey" FOREIGN KEY ("employeeId") REFERENCES "employees"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
ALTER TABLE "leave_entitlements" ADD CONSTRAINT "leave_entitlements_employeeId_fkey" FOREIGN KEY ("employeeId") REFERENCES "employees"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
ALTER TABLE "employee_contracts" ADD CONSTRAINT "employee_contracts_employeeId_fkey" FOREIGN KEY ("employeeId") REFERENCES "employees"("id") ON DELETE RESTRICT ON UPDATE CASCADE;