-- CreateEnum
CREATE TYPE "PerformanceReviewCycleType" AS ENUM ('monthly', 'quarterly', 'semi_annual', 'annual');

-- CreateEnum
CREATE TYPE "PerformanceReviewCycleStatus" AS ENUM ('draft', 'active', 'completed');

-- CreateEnum
CREATE TYPE "PerformanceReviewDimensionType" AS ENUM ('work_quality', 'work_efficiency', 'teamwork', 'initiative', 'professional_skill');

-- CreateTable
CREATE TABLE "performance_review_cycles" (
    "id" UUID NOT NULL,
    "name" TEXT NOT NULL,
    "cycle_type" "PerformanceReviewCycleType" NOT NULL,
    "start_date" DATE NOT NULL,
    "end_date" DATE NOT NULL,
    "status" "PerformanceReviewCycleStatus" NOT NULL DEFAULT 'draft',
    "activated_at" TIMESTAMP(3),
    "completed_at" TIMESTAMP(3),
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "created_by" UUID,
    "updated_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updated_by" UUID,

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

-- CreateTable
CREATE TABLE "performance_reviews" (
    "id" UUID NOT NULL,
    "cycle_id" UUID NOT NULL,
    "employee_id" UUID NOT NULL,
    "reviewer_employee_id" UUID NOT NULL,
    "overall_score" DECIMAL(3,1) NOT NULL,
    "comment" TEXT,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "created_by" UUID,
    "updated_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updated_by" UUID,

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

-- CreateTable
CREATE TABLE "performance_review_dimensions" (
    "id" UUID NOT NULL,
    "review_id" UUID NOT NULL,
    "dimension_type" "PerformanceReviewDimensionType" NOT NULL,
    "score" DECIMAL(3,1) NOT NULL,

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

-- CreateIndex
CREATE INDEX "idx_performance_review_cycles_status_start" ON "performance_review_cycles"("status", "start_date");

-- CreateIndex
CREATE INDEX "idx_performance_review_cycles_status_completed" ON "performance_review_cycles"("status", "completed_at");

-- CreateIndex
CREATE UNIQUE INDEX "performance_review_cycles_single_active_ux" ON "performance_review_cycles"("status") WHERE "status" = 'active';

-- CreateIndex
CREATE UNIQUE INDEX "performance_reviews_cycle_employee_ux" ON "performance_reviews"("cycle_id", "employee_id");

-- CreateIndex
CREATE INDEX "idx_performance_reviews_cycle_reviewer" ON "performance_reviews"("cycle_id", "reviewer_employee_id");

-- CreateIndex
CREATE INDEX "idx_performance_reviews_employee_created" ON "performance_reviews"("employee_id", "created_at");

-- CreateIndex
CREATE UNIQUE INDEX "performance_review_dimensions_review_dimension_ux" ON "performance_review_dimensions"("review_id", "dimension_type");

-- CreateIndex
CREATE INDEX "idx_performance_review_dimensions_dimension_score" ON "performance_review_dimensions"("dimension_type", "score");

-- AddForeignKey
ALTER TABLE "performance_reviews" ADD CONSTRAINT "performance_reviews_cycle_id_fkey" FOREIGN KEY ("cycle_id") REFERENCES "performance_review_cycles"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "performance_reviews" ADD CONSTRAINT "performance_reviews_employee_id_fkey" FOREIGN KEY ("employee_id") REFERENCES "employees"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "performance_reviews" ADD CONSTRAINT "performance_reviews_reviewer_employee_id_fkey" FOREIGN KEY ("reviewer_employee_id") REFERENCES "employees"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "performance_review_dimensions" ADD CONSTRAINT "performance_review_dimensions_review_id_fkey" FOREIGN KEY ("review_id") REFERENCES "performance_reviews"("id") ON DELETE CASCADE ON UPDATE CASCADE;