/*
  Warnings:

  - Added the required column `leave_type_id` to the `leave_requests` table without a default value. This is not possible if the table is not empty.
  - Added the required column `requested_days` to the `leave_requests` table without a default value. This is not possible if the table is not empty.

*/
-- CreateEnum
CREATE TYPE "LeaveDaySession" AS ENUM ('am', 'pm');

-- CreateEnum
CREATE TYPE "LeaveLedgerEntryType" AS ENUM ('grant', 'reserve', 'consume', 'release', 'adjust');

-- AlterTable
ALTER TABLE "leave_requests" ADD COLUMN     "attachment_mime_type" TEXT,
ADD COLUMN     "attachment_original_name" TEXT,
ADD COLUMN     "attachment_storage_path" TEXT,
ADD COLUMN     "end_session" "LeaveDaySession" NOT NULL DEFAULT 'pm',
ADD COLUMN     "leave_type_id" UUID NOT NULL,
ADD COLUMN     "requested_days" DECIMAL(8,1) NOT NULL,
ADD COLUMN     "start_session" "LeaveDaySession" NOT NULL DEFAULT 'am';

-- CreateTable
CREATE TABLE "leave_types" (
    "id" UUID NOT NULL,
    "code" TEXT NOT NULL,
    "name" TEXT NOT NULL,
    "description" TEXT,
    "enabled" BOOLEAN NOT NULL DEFAULT true,
    "requires_attachment" BOOLEAN NOT NULL DEFAULT false,
    "attachment_mime_types" JSONB,
    "sort_order" INTEGER NOT NULL DEFAULT 100,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "created_by" UUID,
    "updated_at" TIMESTAMP(3) NOT NULL,
    "updated_by" UUID,

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

-- CreateTable
CREATE TABLE "leave_policies" (
    "id" UUID NOT NULL,
    "leave_type_id" UUID NOT NULL,
    "annual_quota_days" DECIMAL(8,1) NOT NULL,
    "enabled" BOOLEAN NOT NULL DEFAULT true,
    "description" TEXT,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "created_by" UUID,
    "updated_at" TIMESTAMP(3) NOT NULL,
    "updated_by" UUID,

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

-- CreateTable
CREATE TABLE "leave_ledgers" (
    "id" UUID NOT NULL,
    "employee_id" UUID NOT NULL,
    "leave_type_id" UUID NOT NULL,
    "leave_policy_id" UUID,
    "leave_request_id" UUID,
    "entry_type" "LeaveLedgerEntryType" NOT NULL,
    "days" DECIMAL(8,1) NOT NULL,
    "period_start" DATE,
    "period_end" DATE,
    "note" TEXT,
    "payload" JSONB,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "created_by" UUID,

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

-- CreateIndex
CREATE UNIQUE INDEX "leave_types_code_key" ON "leave_types"("code");

-- CreateIndex
CREATE INDEX "idx_leave_types_enabled_sort_order" ON "leave_types"("enabled", "sort_order");

-- CreateIndex
CREATE UNIQUE INDEX "leave_policies_leave_type_id_key" ON "leave_policies"("leave_type_id");

-- CreateIndex
CREATE INDEX "idx_leave_policies_enabled" ON "leave_policies"("enabled");

-- CreateIndex
CREATE INDEX "idx_leave_ledger_employee_type_created_at" ON "leave_ledgers"("employee_id", "leave_type_id", "created_at");

-- CreateIndex
CREATE INDEX "leave_ledgers_leave_request_id_idx" ON "leave_ledgers"("leave_request_id");

-- CreateIndex
CREATE INDEX "idx_leave_ledger_period" ON "leave_ledgers"("period_start", "period_end");

-- CreateIndex
CREATE INDEX "idx_leave_ledger_entry_employee" ON "leave_ledgers"("entry_type", "employee_id");

-- CreateIndex
CREATE INDEX "leave_requests_leave_type_id_idx" ON "leave_requests"("leave_type_id");

-- CreateIndex
CREATE INDEX "idx_leave_owner_date_range" ON "leave_requests"("owner_id", "start_date", "end_date");

-- AddForeignKey
ALTER TABLE "leave_policies" ADD CONSTRAINT "leave_policies_leave_type_id_fkey" FOREIGN KEY ("leave_type_id") REFERENCES "leave_types"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "leave_requests" ADD CONSTRAINT "leave_requests_leave_type_id_fkey" FOREIGN KEY ("leave_type_id") REFERENCES "leave_types"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

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

-- AddForeignKey
ALTER TABLE "leave_ledgers" ADD CONSTRAINT "leave_ledgers_leave_type_id_fkey" FOREIGN KEY ("leave_type_id") REFERENCES "leave_types"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "leave_ledgers" ADD CONSTRAINT "leave_ledgers_leave_policy_id_fkey" FOREIGN KEY ("leave_policy_id") REFERENCES "leave_policies"("id") ON DELETE SET NULL ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "leave_ledgers" ADD CONSTRAINT "leave_ledgers_leave_request_id_fkey" FOREIGN KEY ("leave_request_id") REFERENCES "leave_requests"("id") ON DELETE SET NULL ON UPDATE CASCADE;