package handlers

import (
	"bytes"
	"context"
	"errors"
	"io"
	"net/http"
	"testing"
	"time"

	mysqldriver "github.com/go-sql-driver/mysql"
	"github.com/gofiber/fiber/v2"

	"wucher/internal/domain/land"
	"wucher/internal/service"
	"wucher/internal/shared/pkg/uuidv7"
	"wucher/internal/transport/http/dto"
)

type memLandRepo struct {
	rows map[string]*land.Land

	createErr  error
	updateErr  error
	deleteErr  error
	getByIDErr error
	listErr    error

	listRows  []land.Land
	listTotal int64

	getByIDFn func(id []byte, call int) (*land.Land, error)
	getCalls  int

	lastCreate     *land.Land
	lastUpdate     *land.Land
	lastDeleteID   []byte
	lastDeleteBy   []byte
	lastListFilter string
	lastListSort   string
	lastListLimit  int
	lastListOffset int
}

func newMemLandRepo() *memLandRepo {
	return &memLandRepo{
		rows: map[string]*land.Land{},
	}
}

func (r *memLandRepo) Create(_ context.Context, row *land.Land) error {
	if r.createErr != nil {
		return r.createErr
	}
	if len(row.ID) == 0 {
		row.ID = uuidv7.MustBytes()
	}
	r.rows[string(row.ID)] = row
	r.lastCreate = row
	return nil
}

func (r *memLandRepo) Update(_ context.Context, row *land.Land) error {
	if r.updateErr != nil {
		return r.updateErr
	}
	r.rows[string(row.ID)] = row
	r.lastUpdate = row
	return nil
}

func (r *memLandRepo) Delete(_ context.Context, id []byte, deletedBy []byte) error {
	if r.deleteErr != nil {
		return r.deleteErr
	}
	r.lastDeleteID = append([]byte(nil), id...)
	r.lastDeleteBy = append([]byte(nil), deletedBy...)
	delete(r.rows, string(id))
	return nil
}

func (r *memLandRepo) GetByID(_ context.Context, id []byte) (*land.Land, error) {
	r.getCalls++
	if r.getByIDFn != nil {
		return r.getByIDFn(id, r.getCalls)
	}
	if r.getByIDErr != nil {
		return nil, r.getByIDErr
	}
	return r.rows[string(id)], nil
}

func (r *memLandRepo) List(_ context.Context, filter, sort string, limit, offset int) ([]land.Land, int64, error) {
	r.lastListFilter = filter
	r.lastListSort = sort
	r.lastListLimit = limit
	r.lastListOffset = offset
	if r.listErr != nil {
		return nil, 0, r.listErr
	}
	return r.listRows, r.listTotal, nil
}

func newLandTestApp(h *LandHandler, actor []byte) *fiber.App {
	app := fiber.New()
	app.Use(func(c *fiber.Ctx) error {
		if len(actor) > 0 {
			c.Locals("user_id", actor)
		}
		return c.Next()
	})
	app.Post("/api/v1/land/create", h.Create)
	app.Patch("/api/v1/land/update/:id", h.Update)
	app.Delete("/api/v1/land/delete/:id", h.Delete)
	app.Get("/api/v1/land/get-all", h.List)
	app.Get("/api/v1/land/get-all/dt", h.ListDatatable)
	return app
}

func doJSONRequestLand(t *testing.T, app *fiber.App, method, path string, body []byte) (*http.Response, []byte) {
	t.Helper()
	req, err := http.NewRequest(method, path, bytes.NewReader(body))
	if err != nil {
		t.Fatalf("new request: %v", err)
	}
	req.Header.Set("Content-Type", "application/json")
	resp, err := app.Test(req)
	if err != nil {
		t.Fatalf("app.Test: %v", err)
	}
	respBody, err := io.ReadAll(resp.Body)
	if err != nil {
		t.Fatalf("read body: %v", err)
	}
	return resp, respBody
}

func mustUUIDStringLand(t *testing.T, id []byte) string {
	t.Helper()
	s, err := uuidv7.BytesToString(id)
	if err != nil {
		t.Fatalf("uuid to string: %v", err)
	}
	return s
}

func TestNewLandHandler(t *testing.T) {
	h := NewLandHandler(service.NewLandService(newMemLandRepo()))
	if h == nil || h.validate == nil {
		t.Fatalf("expected handler and validator initialized")
	}
}

type landViewServiceMock struct {
	land.Service
	getByIDViewFn func(context.Context, []byte) (*dto.LandView, error)
	listViewFn    func(context.Context, string, string, int, int) ([]dto.LandView, int64, error)
}

func (m *landViewServiceMock) GetByIDView(ctx context.Context, id []byte) (*dto.LandView, error) {
	return m.getByIDViewFn(ctx, id)
}

func (m *landViewServiceMock) ListView(ctx context.Context, filter, sort string, limit, offset int) ([]dto.LandView, int64, error) {
	return m.listViewFn(ctx, filter, sort, limit, offset)
}

func TestLandHandlerViewHelpers(t *testing.T) {
	t.Run("getByIDView via extended interface", func(t *testing.T) {
		id := uuidv7.MustBytes()
		want := &dto.LandView{Row: land.Land{ID: id, Name: "Austria"}}
		h := NewLandHandler(&landViewServiceMock{
			getByIDViewFn: func(_ context.Context, gotID []byte) (*dto.LandView, error) {
				if string(gotID) != string(id) {
					t.Fatalf("unexpected id")
				}
				return want, nil
			},
		})
		got, err := h.getByIDView(context.Background(), id)
		if err != nil || got == nil || got.Row.Name != "Austria" {
			t.Fatalf("expected extended getByIDView path")
		}
	})

	t.Run("getByIDView fallback via base service", func(t *testing.T) {
		repo := newMemLandRepo()
		id := uuidv7.MustBytes()
		repo.rows[string(id)] = &land.Land{ID: id, Name: "Germany"}
		h := NewLandHandler(service.NewLandService(repo))
		got, err := h.getByIDView(context.Background(), id)
		if err != nil || got == nil || got.Row.Name != "Germany" {
			t.Fatalf("expected fallback getByIDView")
		}
	})

	t.Run("listView via extended interface", func(t *testing.T) {
		h := NewLandHandler(&landViewServiceMock{
			listViewFn: func(_ context.Context, filter, sort string, limit, offset int) ([]dto.LandView, int64, error) {
				if filter != "eu" || sort != "name ASC" || limit != 10 || offset != 5 {
					t.Fatalf("unexpected list args")
				}
				return []dto.LandView{{Row: land.Land{Name: "Italy"}}}, 1, nil
			},
		})
		rows, total, err := h.listView(context.Background(), "eu", "name ASC", 10, 5)
		if err != nil || total != 1 || len(rows) != 1 || rows[0].Row.Name != "Italy" {
			t.Fatalf("expected extended listView")
		}
	})

	t.Run("listView fallback via base service", func(t *testing.T) {
		repo := newMemLandRepo()
		repo.listRows = []land.Land{{ID: uuidv7.MustBytes(), Name: "France"}}
		repo.listTotal = 1
		h := NewLandHandler(service.NewLandService(repo))
		rows, total, err := h.listView(context.Background(), "", "name ASC", 20, 0)
		if err != nil || total != 1 || len(rows) != 1 || rows[0].Row.Name != "France" {
			t.Fatalf("expected fallback listView")
		}
	})
}

func TestLandHandlerCreate(t *testing.T) {
	t.Run("invalid json", func(t *testing.T) {
		repo := newMemLandRepo()
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)

		resp, _ := doJSONRequestLand(t, app, http.MethodPost, "/api/v1/land/create", []byte(`{"data":`))
		if resp.StatusCode != http.StatusBadRequest {
			t.Fatalf("expected 400, got %d", resp.StatusCode)
		}
	})

	t.Run("validation error", func(t *testing.T) {
		repo := newMemLandRepo()
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)

		resp, _ := doJSONRequestLand(t, app, http.MethodPost, "/api/v1/land/create", []byte(`{}`))
		if resp.StatusCode != http.StatusUnprocessableEntity {
			t.Fatalf("expected 422, got %d", resp.StatusCode)
		}
	})

	t.Run("name empty", func(t *testing.T) {
		repo := newMemLandRepo()
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)

		body := []byte(`{"data":{"type":"land","attributes":{"name":"  "}}}`)
		resp, _ := doJSONRequestLand(t, app, http.MethodPost, "/api/v1/land/create", body)
		if resp.StatusCode != http.StatusUnprocessableEntity {
			t.Fatalf("expected 422, got %d", resp.StatusCode)
		}
	})

	t.Run("create error", func(t *testing.T) {
		repo := newMemLandRepo()
		repo.createErr = errors.New("create failed")
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)

		body := []byte(`{"data":{"type":"land","attributes":{"name":"Germany"}}}`)
		resp, _ := doJSONRequestLand(t, app, http.MethodPost, "/api/v1/land/create", body)
		if resp.StatusCode != http.StatusBadRequest {
			t.Fatalf("expected 400, got %d", resp.StatusCode)
		}
	})

	t.Run("duplicate iso_code", func(t *testing.T) {
		repo := newMemLandRepo()
		repo.createErr = &mysqldriver.MySQLError{
			Number:  1062,
			Message: "Duplicate entry 'DE' for key 'uq_lands_land_iso_code'",
		}
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)

		body := []byte(`{"data":{"type":"land","attributes":{"name":"Germany","iso_code":"DE"}}}`)
		resp, respBody := doJSONRequestLand(t, app, http.MethodPost, "/api/v1/land/create", body)
		if resp.StatusCode != http.StatusUnprocessableEntity {
			t.Fatalf("expected 422, got %d", resp.StatusCode)
		}
		if !bytes.Contains(respBody, []byte(`"iso_code already exists"`)) {
			t.Fatalf("expected duplicate iso_code detail, got %s", string(respBody))
		}
	})

	t.Run("success with refetch", func(t *testing.T) {
		repo := newMemLandRepo()
		h := NewLandHandler(service.NewLandService(repo))
		actor := uuidv7.MustBytes()
		app := newLandTestApp(h, actor)

		body := []byte(`{"data":{"type":"land","attributes":{"name":"Germany","note":"  EU region  ","iso_code":"de","bmd_export_id":" DE001 ","sortkey":3,"is_active":false}}}`)
		resp, _ := doJSONRequestLand(t, app, http.MethodPost, "/api/v1/land/create", body)
		if resp.StatusCode != http.StatusCreated {
			t.Fatalf("expected 201, got %d", resp.StatusCode)
		}
		if repo.lastCreate == nil {
			t.Fatalf("expected row created")
		}
		if repo.lastCreate.Name != "Germany" {
			t.Fatalf("expected attributes to be mapped and trimmed")
		}
		if repo.lastCreate.LandISOCode != "DE" {
			t.Fatalf("expected iso_code normalized")
		}
		if repo.lastCreate.BMDExportID == nil || *repo.lastCreate.BMDExportID != "DE001" {
			t.Fatalf("expected bmd_export_id normalized")
		}
		if repo.lastCreate.Note != "EU region" {
			t.Fatalf("expected note normalized")
		}
		if repo.lastCreate.SortKey == nil || *repo.lastCreate.SortKey != 3 {
			t.Fatalf("expected sortkey=3 to be mapped")
		}
		if repo.lastCreate.IsActive {
			t.Fatalf("expected is_active=false to be mapped")
		}
		if string(repo.lastCreate.CreatedBy) != string(actor) || string(repo.lastCreate.UpdatedBy) != string(actor) {
			t.Fatalf("expected created_by and updated_by from actor")
		}
	})

	t.Run("success fallback when refetch error", func(t *testing.T) {
		repo := newMemLandRepo()
		repo.getByIDFn = func(_ []byte, call int) (*land.Land, error) {
			if call > 0 {
				return nil, errors.New("lookup failed")
			}
			return nil, nil
		}
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)

		body := []byte(`{"data":{"type":"land","attributes":{"name":"Germany"}}}`)
		resp, _ := doJSONRequestLand(t, app, http.MethodPost, "/api/v1/land/create", body)
		if resp.StatusCode != http.StatusCreated {
			t.Fatalf("expected 201, got %d", resp.StatusCode)
		}
	})
}

func TestLandHandlerUpdate(t *testing.T) {
	t.Run("invalid uuid", func(t *testing.T) {
		repo := newMemLandRepo()
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)

		resp, _ := doJSONRequestLand(t, app, http.MethodPatch, "/api/v1/land/update/not-uuid", []byte(`{}`))
		if resp.StatusCode != http.StatusUnprocessableEntity {
			t.Fatalf("expected 422, got %d", resp.StatusCode)
		}
	})

	t.Run("invalid json", func(t *testing.T) {
		repo := newMemLandRepo()
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)
		id := mustUUIDStringLand(t, uuidv7.MustBytes())

		resp, _ := doJSONRequestLand(t, app, http.MethodPatch, "/api/v1/land/update/"+id, []byte(`{"data":`))
		if resp.StatusCode != http.StatusBadRequest {
			t.Fatalf("expected 400, got %d", resp.StatusCode)
		}
	})

	t.Run("validation error", func(t *testing.T) {
		repo := newMemLandRepo()
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)
		id := mustUUIDStringLand(t, uuidv7.MustBytes())

		resp, _ := doJSONRequestLand(t, app, http.MethodPatch, "/api/v1/land/update/"+id, []byte(`{"data":{"type":"x","id":"`+id+`","attributes":{"name":"A"}}}`))
		if resp.StatusCode != http.StatusUnprocessableEntity {
			t.Fatalf("expected 422, got %d", resp.StatusCode)
		}
	})

	t.Run("id required", func(t *testing.T) {
		repo := newMemLandRepo()
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)
		id := mustUUIDStringLand(t, uuidv7.MustBytes())

		resp, _ := doJSONRequestLand(t, app, http.MethodPatch, "/api/v1/land/update/"+id, []byte(`{"data":{"type":"land","id":"","attributes":{"name":"A"}}}`))
		if resp.StatusCode != http.StatusUnprocessableEntity {
			t.Fatalf("expected 422, got %d", resp.StatusCode)
		}
	})

	t.Run("id mismatch", func(t *testing.T) {
		repo := newMemLandRepo()
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)
		id := mustUUIDStringLand(t, uuidv7.MustBytes())
		other := mustUUIDStringLand(t, uuidv7.MustBytes())

		resp, _ := doJSONRequestLand(t, app, http.MethodPatch, "/api/v1/land/update/"+id, []byte(`{"data":{"type":"land","id":"`+other+`","attributes":{"name":"A"}}}`))
		if resp.StatusCode != http.StatusUnprocessableEntity {
			t.Fatalf("expected 422, got %d", resp.StatusCode)
		}
	})

	t.Run("no attributes", func(t *testing.T) {
		repo := newMemLandRepo()
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)
		id := mustUUIDStringLand(t, uuidv7.MustBytes())

		resp, _ := doJSONRequestLand(t, app, http.MethodPatch, "/api/v1/land/update/"+id, []byte(`{"data":{"type":"land","id":"`+id+`","attributes":{}}}`))
		if resp.StatusCode != http.StatusUnprocessableEntity {
			t.Fatalf("expected 422, got %d", resp.StatusCode)
		}
	})

	t.Run("not found", func(t *testing.T) {
		repo := newMemLandRepo()
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)
		id := mustUUIDStringLand(t, uuidv7.MustBytes())

		resp, _ := doJSONRequestLand(t, app, http.MethodPatch, "/api/v1/land/update/"+id, []byte(`{"data":{"type":"land","id":"`+id+`","attributes":{"name":"A"}}}`))
		if resp.StatusCode != http.StatusNotFound {
			t.Fatalf("expected 404, got %d", resp.StatusCode)
		}
	})

	t.Run("name empty", func(t *testing.T) {
		repo := newMemLandRepo()
		id := uuidv7.MustBytes()
		repo.rows[string(id)] = &land.Land{ID: id, Name: "Old"}
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)
		idStr := mustUUIDStringLand(t, id)

		resp, _ := doJSONRequestLand(t, app, http.MethodPatch, "/api/v1/land/update/"+idStr, []byte(`{"data":{"type":"land","id":"`+idStr+`","attributes":{"name":"  "}}}`))
		if resp.StatusCode != http.StatusUnprocessableEntity {
			t.Fatalf("expected 422, got %d", resp.StatusCode)
		}
	})

	t.Run("update error", func(t *testing.T) {
		repo := newMemLandRepo()
		id := uuidv7.MustBytes()
		repo.rows[string(id)] = &land.Land{ID: id, Name: "Old"}
		repo.updateErr = errors.New("update failed")
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)
		idStr := mustUUIDStringLand(t, id)

		resp, _ := doJSONRequestLand(t, app, http.MethodPatch, "/api/v1/land/update/"+idStr, []byte(`{"data":{"type":"land","id":"`+idStr+`","attributes":{"name":"New"}}}`))
		if resp.StatusCode != http.StatusBadRequest {
			t.Fatalf("expected 400, got %d", resp.StatusCode)
		}
	})

	t.Run("success with refetch", func(t *testing.T) {
		repo := newMemLandRepo()
		id := uuidv7.MustBytes()
		repo.rows[string(id)] = &land.Land{ID: id, Name: "Old"}
		h := NewLandHandler(service.NewLandService(repo))
		actor := uuidv7.MustBytes()
		app := newLandTestApp(h, actor)
		idStr := mustUUIDStringLand(t, id)

		resp, _ := doJSONRequestLand(t, app, http.MethodPatch, "/api/v1/land/update/"+idStr, []byte(`{"data":{"type":"land","id":"`+idStr+`","attributes":{"name":"  New  ","note":"  updated note  ","iso_code":"id","bmd_export_id":" ID123 ","sortkey":2,"is_active":false}}}`))
		if resp.StatusCode != http.StatusOK {
			t.Fatalf("expected 200, got %d", resp.StatusCode)
		}
		if repo.lastUpdate == nil || repo.lastUpdate.Name != "New" {
			t.Fatalf("expected updated values")
		}
		if repo.lastUpdate.LandISOCode != "ID" {
			t.Fatalf("expected updated iso_code")
		}
		if repo.lastUpdate.BMDExportID == nil || *repo.lastUpdate.BMDExportID != "ID123" {
			t.Fatalf("expected updated bmd_export_id")
		}
		if repo.lastUpdate.Note != "updated note" {
			t.Fatalf("expected updated note")
		}
		if repo.lastUpdate.SortKey == nil || *repo.lastUpdate.SortKey != 2 {
			t.Fatalf("expected updated sortkey=2")
		}
		if repo.lastUpdate.IsActive {
			t.Fatalf("expected is_active=false updated")
		}
		if string(repo.lastUpdate.UpdatedBy) != string(actor) {
			t.Fatalf("expected updated_by from actor")
		}
	})

	t.Run("success fallback when refetch fails", func(t *testing.T) {
		repo := newMemLandRepo()
		id := uuidv7.MustBytes()
		existing := &land.Land{ID: id, Name: "Old"}
		repo.getByIDFn = func(_ []byte, call int) (*land.Land, error) {
			if call == 1 {
				return existing, nil
			}
			return nil, errors.New("second lookup failed")
		}
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)
		idStr := mustUUIDStringLand(t, id)

		resp, _ := doJSONRequestLand(t, app, http.MethodPatch, "/api/v1/land/update/"+idStr, []byte(`{"data":{"type":"land","id":"`+idStr+`","attributes":{"name":"Only"}}}`))
		if resp.StatusCode != http.StatusOK {
			t.Fatalf("expected 200, got %d", resp.StatusCode)
		}
	})

	t.Run("duplicate iso_code", func(t *testing.T) {
		repo := newMemLandRepo()
		id := uuidv7.MustBytes()
		repo.rows[string(id)] = &land.Land{
			ID:          id,
			Name:        "Germany",
			LandISOCode: "DE",
			IsActive:    true,
		}
		repo.updateErr = &mysqldriver.MySQLError{
			Number:  1062,
			Message: "Duplicate entry 'ID' for key 'uq_lands_land_iso_code'",
		}
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)
		idStr := mustUUIDStringLand(t, id)

		resp, respBody := doJSONRequestLand(t, app, http.MethodPatch, "/api/v1/land/update/"+idStr, []byte(`{"data":{"type":"land","id":"`+idStr+`","attributes":{"iso_code":"ID"}}}`))
		if resp.StatusCode != http.StatusUnprocessableEntity {
			t.Fatalf("expected 422, got %d", resp.StatusCode)
		}
		if !bytes.Contains(respBody, []byte(`"iso_code already exists"`)) {
			t.Fatalf("expected duplicate iso_code detail, got %s", string(respBody))
		}
	})
}

func TestLandHandlerDelete(t *testing.T) {
	t.Run("invalid uuid", func(t *testing.T) {
		repo := newMemLandRepo()
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)

		resp, _ := doJSONRequestLand(t, app, http.MethodDelete, "/api/v1/land/delete/not-uuid", nil)
		if resp.StatusCode != http.StatusUnprocessableEntity {
			t.Fatalf("expected 422, got %d", resp.StatusCode)
		}
	})

	t.Run("delete error", func(t *testing.T) {
		repo := newMemLandRepo()
		repo.deleteErr = errors.New("delete failed")
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)
		id := mustUUIDStringLand(t, uuidv7.MustBytes())

		resp, _ := doJSONRequestLand(t, app, http.MethodDelete, "/api/v1/land/delete/"+id, nil)
		if resp.StatusCode != http.StatusBadRequest {
			t.Fatalf("expected 400, got %d", resp.StatusCode)
		}
	})

	t.Run("success", func(t *testing.T) {
		repo := newMemLandRepo()
		h := NewLandHandler(service.NewLandService(repo))
		actor := uuidv7.MustBytes()
		app := newLandTestApp(h, actor)
		id := uuidv7.MustBytes()
		idStr := mustUUIDStringLand(t, id)

		resp, _ := doJSONRequestLand(t, app, http.MethodDelete, "/api/v1/land/delete/"+idStr, nil)
		if resp.StatusCode != http.StatusOK {
			t.Fatalf("expected 200, got %d", resp.StatusCode)
		}
		if string(repo.lastDeleteBy) != string(actor) {
			t.Fatalf("expected deleted_by from actor")
		}
	})
}

func TestLandHandlerList(t *testing.T) {
	t.Run("list error", func(t *testing.T) {
		repo := newMemLandRepo()
		repo.listErr = errors.New("list failed")
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)

		resp, _ := doJSONRequestLand(t, app, http.MethodGet, "/api/v1/land/get-all", nil)
		if resp.StatusCode != http.StatusBadRequest {
			t.Fatalf("expected 400, got %d", resp.StatusCode)
		}
	})

	t.Run("success with filter name and clamp max", func(t *testing.T) {
		repo := newMemLandRepo()
		repo.listRows = []land.Land{{ID: uuidv7.MustBytes(), Name: "A", SortKey: intPtrLandHandler(3), CreatedAt: time.Now(), UpdatedAt: time.Now()}}
		repo.listTotal = 1
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)

		resp, _ := doJSONRequestLand(t, app, http.MethodGet, "/api/v1/land/get-all?filter[name]=abc&page[number]=0&page=0&page[size]=0&limit=101&sort=-sortkey", nil)
		if resp.StatusCode != http.StatusOK {
			t.Fatalf("expected 200, got %d", resp.StatusCode)
		}
		if repo.lastListFilter != "abc" || repo.lastListSort != "is_active DESC, CASE WHEN is_active = 1 AND sortkey IS NOT NULL AND sortkey >= 0 THEN 0 ELSE 1 END ASC, CASE WHEN is_active = 1 AND sortkey IS NOT NULL AND sortkey >= 0 THEN sortkey END DESC, name ASC" || repo.lastListLimit != 0 || repo.lastListOffset != 0 {
			t.Fatalf("unexpected list params: filter=%q sort=%q limit=%d offset=%d", repo.lastListFilter, repo.lastListSort, repo.lastListLimit, repo.lastListOffset)
		}
	})

	t.Run("success with search and clamp min", func(t *testing.T) {
		repo := newMemLandRepo()
		repo.listRows = []land.Land{}
		repo.listTotal = 0
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)

		resp, _ := doJSONRequestLand(t, app, http.MethodGet, "/api/v1/land/get-all?page=2&size=-1&search=needle", nil)
		if resp.StatusCode != http.StatusOK {
			t.Fatalf("expected 200, got %d", resp.StatusCode)
		}
		if repo.lastListFilter != "needle" || repo.lastListLimit != 0 || repo.lastListOffset != 0 {
			t.Fatalf("unexpected list params: filter=%q limit=%d offset=%d", repo.lastListFilter, repo.lastListLimit, repo.lastListOffset)
		}
	})
}

func TestLandHandlerListDatatable(t *testing.T) {
	t.Run("list error", func(t *testing.T) {
		repo := newMemLandRepo()
		repo.listErr = errors.New("list failed")
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)

		resp, _ := doJSONRequestLand(t, app, http.MethodGet, "/api/v1/land/get-all/dt", nil)
		if resp.StatusCode != http.StatusBadRequest {
			t.Fatalf("expected 400, got %d", resp.StatusCode)
		}
	})

	t.Run("success page floor without clamping small custom size", func(t *testing.T) {
		repo := newMemLandRepo()
		repo.listRows = []land.Land{{ID: uuidv7.MustBytes(), Name: "A", CreatedAt: time.Now(), UpdatedAt: time.Now()}}
		repo.listTotal = 1
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)

		resp, _ := doJSONRequestLand(t, app, http.MethodGet, "/api/v1/land/get-all/dt?page=0&limit=0&size=101&draw=7&search=abc", nil)
		if resp.StatusCode != http.StatusOK {
			t.Fatalf("expected 200, got %d", resp.StatusCode)
		}
		if repo.lastListFilter != "abc" || repo.lastListLimit != 101 || repo.lastListOffset != 0 {
			t.Fatalf("unexpected list params: filter=%q limit=%d offset=%d", repo.lastListFilter, repo.lastListLimit, repo.lastListOffset)
		}
	})

	t.Run("success clamp min", func(t *testing.T) {
		repo := newMemLandRepo()
		repo.listRows = []land.Land{}
		repo.listTotal = 0
		h := NewLandHandler(service.NewLandService(repo))
		app := newLandTestApp(h, nil)

		resp, _ := doJSONRequestLand(t, app, http.MethodGet, "/api/v1/land/get-all/dt?page=2&limit=0&size=-1", nil)
		if resp.StatusCode != http.StatusOK {
			t.Fatalf("expected 200, got %d", resp.StatusCode)
		}
		if repo.lastListLimit != 20 || repo.lastListOffset != 20 {
			t.Fatalf("unexpected list params: limit=%d offset=%d", repo.lastListLimit, repo.lastListOffset)
		}
	})
}

func TestLandResource(t *testing.T) {
	id := uuidv7.MustBytes()
	createdBy := uuidv7.MustBytes()
	updatedBy := uuidv7.MustBytes()
	deletedBy := uuidv7.MustBytes()
	now := time.Now().UTC().Truncate(time.Second)
	deletedAt := now.Add(time.Hour)

	row := &dto.LandView{
		Row: land.Land{
			ID:          id,
			Name:        "Germany",
			Note:        "EU region",
			LandISOCode: "DE",
			BMDExportID: strPtrLandHandler("DE001"),
			SortKey:     intPtrLandHandler(2),
			IsActive:    true,
			CreatedAt:   now,
			CreatedBy:   createdBy,
			UpdatedAt:   now,
			UpdatedBy:   updatedBy,
			DeletedAt:   &deletedAt,
			DeletedBy:   deletedBy,
		},
		FederalStateTotal: 2,
		FederalStateList: []dto.LandFederalStateView{
			{ID: uuidv7.MustBytes(), Name: "Bayern"},
			{ID: uuidv7.MustBytes(), Name: "Berlin"},
		},
	}

	res := landResource(row)
	if res.Type != "land" {
		t.Fatalf("unexpected type: %s", res.Type)
	}
	if res.ID == "" || res.Attributes.CreatedBy == "" || res.Attributes.UpdatedBy == "" || res.Attributes.DeletedBy == "" {
		t.Fatalf("expected UUID fields to be mapped")
	}
	if res.Attributes.Name != "Germany" {
		t.Fatalf("unexpected attribute mapping")
	}
	if res.Attributes.Note != "EU region" {
		t.Fatalf("expected note mapped")
	}
	if res.Attributes.ISOCode != "DE" {
		t.Fatalf("expected iso_code mapped")
	}
	if res.Attributes.BMDExportID == nil || *res.Attributes.BMDExportID != "DE001" {
		t.Fatalf("expected bmd_export_id mapped")
	}
	if res.Attributes.FederalStateTotal != 2 || len(res.Attributes.FederalStateList) != 2 {
		t.Fatalf("expected federal_state aggregate fields mapped")
	}
	if res.Attributes.SortKey == nil || *res.Attributes.SortKey != 2 {
		t.Fatalf("expected sortkey mapped")
	}
	if !res.Attributes.IsActive {
		t.Fatalf("expected is_active mapped")
	}
	if res.Attributes.CreatedAt == "" || res.Attributes.UpdatedAt == "" || res.Attributes.DeletedAt == "" {
		t.Fatalf("expected time fields to be mapped")
	}
}

func intPtrLandHandler(v int) *int { return &v }

func strPtrLandHandler(v string) *string { return &v }