//go:build test
// +build test

package user

import (
	"context"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

	"crussell/db"
	"crussell/mw"
	"crussell/testutils/fixtures"

	"github.com/go-chi/chi/v5"
)

// makePatchTestsRequest builds a request for /api/admin/users/{user_id}/patch-tests[/{test_id}].
func makePatchTestsRequest(handler http.HandlerFunc, method, path string, body interface{}, userID, role string) *httptest.ResponseRecorder {
	req := httptest.NewRequest(method, path, nil)

	prefix := "/api/admin/users/"
	suffix := strings.TrimPrefix(path, prefix) // "USERID/patch-tests" or "USERID/patch-tests/TESTID"
	parts := strings.SplitN(suffix, "/", 3)
	// parts[0] = user_id, parts[1] = "patch-tests", parts[2] = test_id (optional)

	rctx := chi.NewRouteContext()
	if len(parts) > 0 {
		rctx.URLParams.Add("user_id", parts[0])
	}
	if len(parts) > 2 {
		rctx.URLParams.Add("test_id", parts[2])
	}

	ctx := context.WithValue(req.Context(), chi.RouteCtxKey, rctx)
	ctx = context.WithValue(ctx, mw.UserIDKey, userID)
	ctx = context.WithValue(ctx, mw.UserRoleKey, role)
	req = req.WithContext(ctx)

	w := httptest.NewRecorder()
	handler(w, req)
	return w
}

// =============================================================================
// GetUserPatchTestsHandler Tests
// =============================================================================

func TestGetUserPatchTests_Empty(t *testing.T) {
	resetTestData(t)
	userID, err := fixtures.CreateTestUser(db.DB)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	w := makePatchTestsRequest(GetUserPatchTestsHandler, "GET", "/api/admin/users/"+userID+"/patch-tests", nil, userID, "verified_email")
	if w.Code != http.StatusOK {
		t.Fatalf("expected 200, got %d. body: %s", w.Code, w.Body.String())
	}

	var tests []UserPatchTest
	if err := json.Unmarshal(w.Body.Bytes(), &tests); err != nil {
		t.Fatalf("failed to parse response: %v", err)
	}
	if len(tests) != 0 {
		t.Errorf("expected empty list, got %d items", len(tests))
	}
}

func TestGetUserPatchTests_WithRecords(t *testing.T) {
	resetTestData(t)
	userID, err := fixtures.CreateTestUser(db.DB)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	// Create a patch test and record
	var patchTestID string
	err = db.DB.QueryRow(context.Background(), `
		INSERT INTO patch_tests (name, description, expiry_months)
		VALUES ('Patch Test A', 'Test description', 6)
		RETURNING id
	`).Scan(&patchTestID)
	if err != nil {
		t.Fatalf("failed to create patch test: %v", err)
	}

	_, err = db.DB.Exec(context.Background(), `
		INSERT INTO user_patch_tests (user_id, patch_test_id, tested_at)
		VALUES ($1, $2, NOW())
	`, userID, patchTestID)
	if err != nil {
		t.Fatalf("failed to create user patch test: %v", err)
	}

	w := makePatchTestsRequest(GetUserPatchTestsHandler, "GET", "/api/admin/users/"+userID+"/patch-tests", nil, userID, "verified_email")
	if w.Code != http.StatusOK {
		t.Fatalf("expected 200, got %d. body: %s", w.Code, w.Body.String())
	}

	var tests []UserPatchTest
	if err := json.Unmarshal(w.Body.Bytes(), &tests); err != nil {
		t.Fatalf("failed to parse response: %v", err)
	}
	if len(tests) != 1 {
		t.Fatalf("expected 1 patch test, got %d", len(tests))
	}
	if tests[0].PatchTestName != "Patch Test A" {
		t.Errorf("expected 'Patch Test A', got %q", tests[0].PatchTestName)
	}
}

func TestGetUserPatchTests_InvalidUserID(t *testing.T) {
	w := makePatchTestsRequest(GetUserPatchTestsHandler, "GET", "/api/admin/users/invalid/patch-tests", nil, "admin001", "admin")
	if w.Code != http.StatusNotFound {
		t.Errorf("expected 404 for invalid user ID, got %d", w.Code)
	}
}

// =============================================================================
// DeletePatchTestHandler Tests
// =============================================================================

func TestDeletePatchTest_HappyPath(t *testing.T) {
	resetTestData(t)
	userID, err := fixtures.CreateTestUser(db.DB)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	var patchTestID string
	err = db.DB.QueryRow(context.Background(), `
		INSERT INTO patch_tests (name, description, expiry_months)
		VALUES ('Patch Test', 'Desc', 6)
		RETURNING id
	`).Scan(&patchTestID)
	if err != nil {
		t.Fatalf("failed to create patch test: %v", err)
	}

	var userPatchTestID string
	err = db.DB.QueryRow(context.Background(), `
		INSERT INTO user_patch_tests (user_id, patch_test_id, tested_at)
		VALUES ($1, $2, NOW())
		RETURNING id
	`, userID, patchTestID).Scan(&userPatchTestID)
	if err != nil {
		t.Fatalf("failed to create user patch test: %v", err)
	}

	w := makePatchTestsRequest(DeletePatchTestHandler, "DELETE", "/api/admin/users/"+userID+"/patch-tests/"+userPatchTestID, nil, userID, "verified_email")
	if w.Code != http.StatusNoContent {
		t.Fatalf("expected 204, got %d. body: %s", w.Code, w.Body.String())
	}

	// Verify deleted
	var count int
	err = db.DB.QueryRow(context.Background(),
		"SELECT COUNT(*) FROM user_patch_tests WHERE id = $1", userPatchTestID).Scan(&count)
	if err != nil {
		t.Fatalf("failed to check: %v", err)
	}
	if count != 0 {
		t.Errorf("expected record to be deleted, count=%d", count)
	}
}

func TestDeletePatchTest_NotFound(t *testing.T) {
	resetTestData(t)
	userID, err := fixtures.CreateTestUser(db.DB)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	w := makePatchTestsRequest(DeletePatchTestHandler, "DELETE", "/api/admin/users/"+userID+"/patch-tests/99999", nil, "admin001", "admin")
	if w.Code != http.StatusNotFound {
		t.Errorf("expected 404 for nonexistent patch test, got %d", w.Code)
	}
}

func TestDeletePatchTest_InvalidUserID(t *testing.T) {
	w := makePatchTestsRequest(DeletePatchTestHandler, "DELETE", "/api/admin/users/invalid/patch-tests/1", nil, "admin001", "admin")
	if w.Code != http.StatusNotFound {
		t.Errorf("expected 404 for invalid user ID, got %d", w.Code)
	}
}

func TestDeletePatchTest_InvalidTestID(t *testing.T) {
	w := makePatchTestsRequest(DeletePatchTestHandler, "DELETE", "/api/admin/users/validuserid/patch-tests/invalid", nil, "admin001", "admin")
	if w.Code != http.StatusNotFound {
		t.Errorf("expected 404 for invalid test ID, got %d", w.Code)
	}
}