const router = require("express").Router();
const ctrl         = require("../../controllers/admin/courses.controller");
const progressCtrl = require("../../controllers/admin/course_reading_progress.controller");
const requirementsCtrl = require("../../controllers/admin/completion_requirements.controller");

const { authenticate } = require("../../middleware/auth.middleware");
const { requireAdmin } = require("../../middleware/rbac.middleware");
const { adminLimiter } = require("../../middleware/rateLimiter.middleware");

router.use(authenticate, requireAdmin(), adminLimiter);

// ══════════════════════════════════════════════════════════════════════════════
// COURSES
// ══════════════════════════════════════════════════════════════════════════════

router.get("/", ctrl.getCourses);
router.post("/", ctrl.createCourse);
router.post("/full", ctrl.createCourseFull); // one-shot Add Course wizard submit (course + roadmap + rewards)

// ── static segments first ────────────────────────────────────────────────────
router.get("/field-values", ctrl.getCourseFieldValues);
router.delete("/bulk", ctrl.bulkArchiveCourses);
router.delete("/bulk/permanent", ctrl.bulkPermanentlyDeleteCourses);
router.get("/archives", ctrl.getArchivedCourses);
router.patch("/restore/bulk", ctrl.bulkRestoreCourses);
router.get("/flat", ctrl.getCoursesFlat);
router.get("/by-subscription", ctrl.getCoursesBySubscription);
router.get("/units-flat", ctrl.getUnitsFlat);
router.get("/lessons-flat", ctrl.getLessonsFlat);
router.get("/quizzes-flat", ctrl.getQuizzesFlat);
router.put("/order", ctrl.reorderCourses); // persist top-level course catalog ordering { course_ids }

// ── then :courseId ────────────────────────────────────────────────────────────
router.get("/archives/:courseId", ctrl.getArchivedCourse);
router.patch("/:courseId/restore", ctrl.restoreCourse);
router.get("/:courseId/archive-impact", ctrl.getCourseArchiveImpact);
router.get("/:courseId/permanent-delete-impact", ctrl.getCoursePermanentDeleteImpact);
router.get("/:courseId", ctrl.getCourse);
router.put("/:courseId", ctrl.updateCourse);
router.delete("/:courseId", ctrl.archiveCourse);
router.delete("/:courseId/permanent", ctrl.permanentlyDeleteCourse);

// ══════════════════════════════════════════════════════════════════════════════
// COURSE INSTRUCTORS
// ══════════════════════════════════════════════════════════════════════════════

router.get("/:courseId/instructors", ctrl.getInstructors);
router.put("/:courseId/instructors", ctrl.syncInstructors);

// ══════════════════════════════════════════════════════════════════════════════
// COURSE ACHIEVEMENTS
// ══════════════════════════════════════════════════════════════════════════════

router.get("/:courseId/achievements", ctrl.getCourseAchievements);
router.put("/:courseId/achievements", ctrl.syncCourseAchievements);

// ══════════════════════════════════════════════════════════════════════════════
// PREREQUISITES
// ══════════════════════════════════════════════════════════════════════════════

router.get("/:courseId/prerequisites", ctrl.getPrerequisites);
router.put("/:courseId/prerequisites", ctrl.syncPrerequisites);

// ══════════════════════════════════════════════════════════════════════════════
// COMPLETION REQUIREMENTS
// ══════════════════════════════════════════════════════════════════════════════

router.get("/:courseId/requirements", requirementsCtrl.getCourseRequirements);
router.put("/:courseId/requirements", requirementsCtrl.syncCourseRequirements);

// ══════════════════════════════════════════════════════════════════════════════
// COURSE ASSESSMENT
// ══════════════════════════════════════════════════════════════════════════════

router.get("/:courseId/assessment", ctrl.getAssessment);
router.post("/:courseId/assessment", ctrl.createAssessment);

// ── static segments first ────────────────────────────────────────────────────
router.get("/:courseId/assessment/archives", ctrl.getArchivedAssessment);

// ── then :assessmentId ────────────────────────────────────────────────────────
router.patch("/:courseId/assessment/:assessmentId", ctrl.updateAssessment);
router.delete("/:courseId/assessment/:assessmentId", ctrl.deleteAssessment);
router.patch("/:courseId/assessment/:assessmentId/restore", ctrl.restoreAssessment);

// ── Assessment Questions ──────────────────────────────────────────────────────
router.get("/:courseId/assessment/:assessmentId/questions", ctrl.getQuestions);
router.post("/:courseId/assessment/:assessmentId/questions", ctrl.createQuestion);

// static before :questionId
router.delete("/:courseId/assessment/:assessmentId/questions/bulk", ctrl.bulkArchiveQuestions);
router.patch("/:courseId/assessment/:assessmentId/questions/restore/bulk", ctrl.bulkRestoreQuestions);
router.put("/:courseId/assessment/:assessmentId/questions/bulk-sync", ctrl.bulkSyncQuestions);
router.get("/:courseId/assessment/:assessmentId/questions/archives/:questionId", ctrl.getArchivedQuestion);

router.patch("/:courseId/assessment/:assessmentId/questions/:questionId", ctrl.updateQuestion);
router.delete("/:courseId/assessment/:assessmentId/questions/:questionId", ctrl.deleteQuestion);
router.patch("/:courseId/assessment/:assessmentId/questions/:questionId/restore", ctrl.restoreQuestion);

// ── Assessment Completions & Sessions ─────────────────────────────────────────
router.get("/:courseId/assessment/:assessmentId/completions", ctrl.getAssessmentCompletions);
router.get("/:courseId/assessment/:assessmentId/sessions",    ctrl.getAssessmentSessions);

// ══════════════════════════════════════════════════════════════════════════════
// UNITS
// ══════════════════════════════════════════════════════════════════════════════

router.get("/:courseId/field-values", ctrl.getUnitFieldValues);
router.get("/:courseId/units", ctrl.getUnits);
router.post("/:courseId/units", ctrl.createUnit);          // create new unit + attach, or attach existing via body { unit_id }

// static before :unitId
router.post("/:courseId/units/attach", ctrl.attachUnits);  // bulk-attach existing library units { unit_ids }
router.put("/:courseId/units/order", ctrl.reorderUnits);   // persist course-level unit ordering { unit_ids }
router.delete("/:courseId/units/bulk", ctrl.bulkArchiveUnits);
router.delete("/:courseId/units/bulk/permanent", ctrl.bulkPermanentlyDeleteUnits);
router.get("/:courseId/units/archives", ctrl.getArchivedUnits);
router.patch("/:courseId/units/restore/bulk", ctrl.bulkRestoreUnits);

router.get("/:courseId/units/archives/:unitId", ctrl.getArchivedUnit);
router.patch("/:courseId/units/:unitId/restore", ctrl.restoreUnit);
router.get("/:courseId/units/:unitId/archive-impact", ctrl.getUnitArchiveImpact);
router.get("/:courseId/units/:unitId/permanent-delete-impact", ctrl.getUnitPermanentDeleteImpact);
router.get("/:courseId/units/:unitId", ctrl.getUnit);
router.put("/:courseId/units/:unitId", ctrl.updateUnit);
router.delete("/:courseId/units/:unitId", ctrl.archiveUnit);
router.delete("/:courseId/units/:unitId/permanent", ctrl.permanentlyDeleteUnit);

router.get("/:courseId/units/:unitId/requirements", requirementsCtrl.getUnitRequirements);
router.put("/:courseId/units/:unitId/requirements", requirementsCtrl.syncUnitRequirements);

// ══════════════════════════════════════════════════════════════════════════════
// UNIT QUIZ
// ══════════════════════════════════════════════════════════════════════════════

router.get("/:courseId/units/:unitId/quiz", ctrl.getQuiz);
router.post("/:courseId/units/:unitId/quiz", ctrl.createQuiz);

// static before :quizId
router.get("/:courseId/units/:unitId/quiz/archives", ctrl.getArchivedQuiz);

router.patch("/:courseId/units/:unitId/quiz/:quizId", ctrl.updateQuiz);
router.delete("/:courseId/units/:unitId/quiz/:quizId", ctrl.deleteQuiz);
router.patch("/:courseId/units/:unitId/quiz/:quizId/restore", ctrl.restoreQuiz);

// ── Quiz Questions ────────────────────────────────────────────────────────────
router.get("/:courseId/units/:unitId/quiz/:quizId/questions", ctrl.getQuestions);
router.post("/:courseId/units/:unitId/quiz/:quizId/questions", ctrl.createQuestion);

// static before :questionId
router.delete("/:courseId/units/:unitId/quiz/:quizId/questions/bulk", ctrl.bulkArchiveQuestions);
router.patch("/:courseId/units/:unitId/quiz/:quizId/questions/restore/bulk", ctrl.bulkRestoreQuestions);
router.put("/:courseId/units/:unitId/quiz/:quizId/questions/bulk-sync", ctrl.bulkSyncQuestions);
router.get("/:courseId/units/:unitId/quiz/:quizId/questions/archives/:questionId", ctrl.getArchivedQuestion);

router.patch("/:courseId/units/:unitId/quiz/:quizId/questions/:questionId", ctrl.updateQuestion);
router.delete("/:courseId/units/:unitId/quiz/:quizId/questions/:questionId", ctrl.deleteQuestion);
router.patch("/:courseId/units/:unitId/quiz/:quizId/questions/:questionId/restore", ctrl.restoreQuestion);

// ── Quiz Completions ──────────────────────────────────────────────────────────
router.get("/:courseId/units/:unitId/quiz/:quizId/completions", ctrl.getQuizCompletions);

// ══════════════════════════════════════════════════════════════════════════════
// LESSONS
// ══════════════════════════════════════════════════════════════════════════════

router.get("/:courseId/units/:unitId/field-values", ctrl.getLessonFieldValues);
router.get("/:courseId/units/:unitId/lessons", ctrl.getLessons);
router.post("/:courseId/units/:unitId/lessons", ctrl.createLesson); // create new lesson + attach, or attach existing via body { lesson_id }

// static before :lessonId
router.put("/:courseId/units/:unitId/lessons/order", ctrl.reorderLessons); // persist unit-level lesson ordering { lesson_ids }
router.delete("/:courseId/units/:unitId/lessons/bulk", ctrl.bulkArchiveLessons);
router.delete("/:courseId/units/:unitId/lessons/bulk/permanent", ctrl.bulkPermanentlyDeleteLessons);
router.get("/:courseId/units/:unitId/lessons/archives", ctrl.getArchivedLessons);
router.patch("/:courseId/units/:unitId/lessons/restore/bulk", ctrl.bulkRestoreLessons);

router.get("/:courseId/units/:unitId/lessons/archives/:lessonId", ctrl.getArchivedLesson);
router.patch("/:courseId/units/:unitId/lessons/:lessonId/restore", ctrl.restoreLesson);
router.get("/:courseId/units/:unitId/lessons/:lessonId", ctrl.getLesson);
router.put("/:courseId/units/:unitId/lessons/:lessonId", ctrl.updateLesson);
router.delete("/:courseId/units/:unitId/lessons/:lessonId", ctrl.archiveLesson);
router.delete("/:courseId/units/:unitId/lessons/:lessonId/permanent", ctrl.permanentlyDeleteLesson);

// ══════════════════════════════════════════════════════════════════════════════
// LESSON PAGE
// ══════════════════════════════════════════════════════════════════════════════

router.get("/:courseId/units/:unitId/lessons/:lessonId/page", ctrl.getLessonPage);
router.put("/:courseId/units/:unitId/lessons/:lessonId/page", ctrl.upsertLessonPage);

// ══════════════════════════════════════════════════════════════════════════════
// LESSON COMPLETION REQUIREMENTS
// ══════════════════════════════════════════════════════════════════════════════

router.get("/:courseId/units/:unitId/lessons/:lessonId/requirements", requirementsCtrl.getLessonRequirements);
router.put("/:courseId/units/:unitId/lessons/:lessonId/requirements", requirementsCtrl.syncLessonRequirements);

// ══════════════════════════════════════════════════════════════════════════════
// COURSE READING PROGRESS
// ══════════════════════════════════════════════════════════════════════════════

// static segment before :userId to avoid param collision
router.get("/:courseId/reading-progress/users/:userId", progressCtrl.getUserReadingProgress);
router.get("/:courseId/reading-progress",               progressCtrl.getCourseReadingProgress);

module.exports = router;