-- CreateEnum
CREATE TYPE "ProjectCommunicationChannel" AS ENUM ('wechat', 'phone', 'meeting', 'wecom', 'email', 'onsite', 'other');

-- CreateEnum
CREATE TYPE "ProjectClosureChecklistStatus" AS ENUM ('pending', 'done', 'waived');

-- CreateTable
CREATE TABLE "project_communication_logs" (
    "id" UUID NOT NULL,
    "project_id" UUID NOT NULL,
    "happened_at" TIMESTAMP(3) NOT NULL,
    "channel" "ProjectCommunicationChannel" NOT NULL,
    "external_contact_name" TEXT,
    "external_org_name" TEXT,
    "summary" TEXT NOT NULL,
    "next_action" TEXT,
    "next_follow_up_date" DATE,
    "created_by" UUID NOT NULL,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updated_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT "project_communication_logs_pkey" PRIMARY KEY ("id")
);

-- CreateTable
CREATE TABLE "project_closure_checklist_items" (
    "id" UUID NOT NULL,
    "project_id" UUID NOT NULL,
    "item_key" VARCHAR(64) NOT NULL,
    "title" TEXT NOT NULL,
    "status" "ProjectClosureChecklistStatus" NOT NULL DEFAULT 'pending',
    "note" TEXT,
    "sort_order" INTEGER NOT NULL DEFAULT 100,
    "completed_at" TIMESTAMP(3),
    "completed_by" UUID,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updated_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT "project_closure_checklist_items_pkey" PRIMARY KEY ("id")
);

-- CreateIndex
CREATE INDEX "idx_project_communication_logs_project_happened" ON "project_communication_logs"("project_id", "happened_at");

-- CreateIndex
CREATE INDEX "idx_project_communication_logs_followup" ON "project_communication_logs"("project_id", "next_follow_up_date");

-- CreateIndex
CREATE INDEX "idx_project_communication_logs_creator_created" ON "project_communication_logs"("created_by", "created_at");

-- CreateIndex
CREATE UNIQUE INDEX "project_closure_checklists_project_key_ux" ON "project_closure_checklist_items"("project_id", "item_key");

-- CreateIndex
CREATE INDEX "idx_project_closure_checklists_project_status" ON "project_closure_checklist_items"("project_id", "status", "sort_order");

-- CreateIndex
CREATE INDEX "idx_project_closure_checklists_completed" ON "project_closure_checklist_items"("completed_by", "completed_at");

-- AddForeignKey
ALTER TABLE "project_communication_logs" ADD CONSTRAINT "project_communication_logs_project_id_fkey" FOREIGN KEY ("project_id") REFERENCES "projects"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "project_communication_logs" ADD CONSTRAINT "project_communication_logs_created_by_fkey" FOREIGN KEY ("created_by") REFERENCES "employees"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "project_closure_checklist_items" ADD CONSTRAINT "project_closure_checklist_items_project_id_fkey" FOREIGN KEY ("project_id") REFERENCES "projects"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "project_closure_checklist_items" ADD CONSTRAINT "project_closure_checklist_items_completed_by_fkey" FOREIGN KEY ("completed_by") REFERENCES "employees"("id") ON DELETE SET NULL ON UPDATE CASCADE;