package handlers

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

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

	apimw "github.com/Silo-Server/silo-server/internal/api/middleware"
	"github.com/Silo-Server/silo-server/internal/auth"
	mediarequests "github.com/Silo-Server/silo-server/internal/requests"
)

type fakeRequestService struct {
	listStudiosFn  func() ([]mediarequests.DiscoverBrandCard, error)
	listNetworksFn func() ([]mediarequests.DiscoverBrandCard, error)
	listGenresFn   func() ([]mediarequests.DiscoverBrandCard, error)
	browseFn       func(kind, slug string, mediaType mediarequests.MediaType, sort string, page int) (*mediarequests.DiscoverBrowseResponse, error)
}

func (f *fakeRequestService) ListStudios(context.Context, mediarequests.Viewer) ([]mediarequests.DiscoverBrandCard, error) {
	if f.listStudiosFn != nil {
		return f.listStudiosFn()
	}
	return nil, nil
}

func (f *fakeRequestService) ListNetworks(context.Context, mediarequests.Viewer) ([]mediarequests.DiscoverBrandCard, error) {
	if f.listNetworksFn != nil {
		return f.listNetworksFn()
	}
	return nil, nil
}

func (f *fakeRequestService) ListGenres(context.Context, mediarequests.Viewer) ([]mediarequests.DiscoverBrandCard, error) {
	if f.listGenresFn != nil {
		return f.listGenresFn()
	}
	return nil, nil
}

func (f *fakeRequestService) BrowseStudio(_ context.Context, _ mediarequests.Viewer, slug, sort string, page int) (*mediarequests.DiscoverBrowseResponse, error) {
	return f.browseFn("studio", slug, mediarequests.MediaTypeMovie, sort, page)
}

func (f *fakeRequestService) BrowseNetwork(_ context.Context, _ mediarequests.Viewer, slug, sort string, page int) (*mediarequests.DiscoverBrowseResponse, error) {
	return f.browseFn("network", slug, mediarequests.MediaTypeSeries, sort, page)
}

func (f *fakeRequestService) BrowseGenre(_ context.Context, _ mediarequests.Viewer, slug string, mediaType mediarequests.MediaType, sort string, page int) (*mediarequests.DiscoverBrowseResponse, error) {
	return f.browseFn("genre", slug, mediaType, sort, page)
}

func (f *fakeRequestService) Search(context.Context, mediarequests.Viewer, string, mediarequests.MediaType, int) (*mediarequests.MediaPage, error) {
	return nil, nil
}

func (f *fakeRequestService) Discover(context.Context, mediarequests.Viewer, string, int) (*mediarequests.DiscoverySection, error) {
	return nil, nil
}

func (f *fakeRequestService) DiscoverAll(context.Context, mediarequests.Viewer) ([]mediarequests.DiscoverySection, error) {
	return nil, nil
}

func (f *fakeRequestService) GetDetail(context.Context, mediarequests.Viewer, mediarequests.MediaType, int) (*mediarequests.MediaDetail, error) {
	return nil, nil
}

func (f *fakeRequestService) CreateRequest(context.Context, mediarequests.Viewer, mediarequests.CreateRequestInput) (*mediarequests.Request, error) {
	return nil, nil
}

func (f *fakeRequestService) ListMine(context.Context, mediarequests.Viewer, mediarequests.ListFilter) ([]*mediarequests.Request, error) {
	return nil, nil
}

func (f *fakeRequestService) ListAdmin(context.Context, mediarequests.Viewer, mediarequests.ListFilter) ([]*mediarequests.Request, error) {
	return nil, nil
}

func (f *fakeRequestService) GetRequest(context.Context, mediarequests.Viewer, string) (*mediarequests.Request, error) {
	return nil, nil
}

func (f *fakeRequestService) Approve(context.Context, mediarequests.Viewer, string) (*mediarequests.Request, error) {
	return nil, nil
}

func (f *fakeRequestService) Decline(context.Context, mediarequests.Viewer, string, string) (*mediarequests.Request, error) {
	return nil, nil
}

func (f *fakeRequestService) Cancel(context.Context, mediarequests.Viewer, string, string) (*mediarequests.Request, error) {
	return nil, nil
}

func (f *fakeRequestService) Retry(context.Context, mediarequests.Viewer, string) (*mediarequests.Request, error) {
	return nil, nil
}

func (f *fakeRequestService) GetFeatureStatus(context.Context, mediarequests.Viewer) (mediarequests.FeatureStatus, error) {
	return mediarequests.FeatureStatus{}, nil
}

func (f *fakeRequestService) GetSettings(context.Context, mediarequests.Viewer) (mediarequests.Settings, error) {
	return mediarequests.Settings{}, nil
}

func (f *fakeRequestService) UpdateSettings(context.Context, mediarequests.Viewer, mediarequests.Settings) (mediarequests.Settings, error) {
	return mediarequests.Settings{}, nil
}

func (f *fakeRequestService) GetUserLimit(context.Context, mediarequests.Viewer, int) (*mediarequests.UserLimit, error) {
	return nil, nil
}

func (f *fakeRequestService) UpsertUserLimit(context.Context, mediarequests.Viewer, mediarequests.UserLimit) (*mediarequests.UserLimit, error) {
	return nil, nil
}

func (f *fakeRequestService) ListIntegrations(context.Context, mediarequests.Viewer) ([]mediarequests.Integration, error) {
	return nil, nil
}

func (f *fakeRequestService) UpsertIntegration(context.Context, mediarequests.Viewer, mediarequests.Integration) (*mediarequests.Integration, error) {
	return nil, nil
}

func (f *fakeRequestService) UpsertIntegrations(context.Context, mediarequests.Viewer, []mediarequests.Integration) ([]mediarequests.Integration, error) {
	return nil, nil
}

func (f *fakeRequestService) LoadIntegrationOptions(context.Context, mediarequests.Viewer, mediarequests.Integration) (*mediarequests.IntegrationOptions, error) {
	return nil, nil
}

func authedRequest(method, target string) *http.Request {
	req := httptest.NewRequest(method, target, nil)
	ctx := apimw.SetClaims(req.Context(), &auth.Claims{
		UserID:    1,
		Role:      "user",
		TokenType: auth.TokenTypeAccess,
	})
	ctx = apimw.SetProfileID(ctx, "profile-1")
	return req.WithContext(ctx)
}

func TestHandleListStudiosReturnsJSON(t *testing.T) {
	logo := "https://image.tmdb.org/t/p/w300/x.png"
	svc := &fakeRequestService{
		listStudiosFn: func() ([]mediarequests.DiscoverBrandCard, error) {
			return []mediarequests.DiscoverBrandCard{
				{TMDBID: 420, Slug: "marvel-studios", DisplayName: "Marvel Studios", LogoURL: &logo},
			}, nil
		},
	}
	h := NewRequestsHandler(svc)

	rec := httptest.NewRecorder()
	h.HandleListStudios(rec, authedRequest("GET", "/api/v1/requests/discover/studios"))

	if rec.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200", rec.Code)
	}
	var body struct {
		Studios []mediarequests.DiscoverBrandCard `json:"studios"`
	}
	if err := json.NewDecoder(rec.Body).Decode(&body); err != nil {
		t.Fatalf("decode: %v", err)
	}
	if len(body.Studios) != 1 || body.Studios[0].Slug != "marvel-studios" {
		t.Errorf("studios = %+v", body.Studios)
	}
}

func TestHandleBrowseStudioRejectsUnknownSort(t *testing.T) {
	svc := &fakeRequestService{
		browseFn: func(kind, slug string, _ mediarequests.MediaType, sort string, _ int) (*mediarequests.DiscoverBrowseResponse, error) {
			return nil, mediarequests.ErrInvalidInput
		},
	}
	h := NewRequestsHandler(svc)

	req := authedRequest("GET", "/api/v1/requests/discover/browse/studio/marvel-studios?sort=garbage")
	rctx := chi.NewRouteContext()
	rctx.URLParams.Add("slug", "marvel-studios")
	req = req.WithContext(context.WithValue(req.Context(), chi.RouteCtxKey, rctx))

	rec := httptest.NewRecorder()
	h.HandleBrowseStudio(rec, req)

	if rec.Code != http.StatusBadRequest {
		t.Fatalf("status = %d, want 400; body=%s", rec.Code, rec.Body.String())
	}
}

func TestHandleBrowseStudioUnknownSlugReturns404(t *testing.T) {
	svc := &fakeRequestService{
		browseFn: func(string, string, mediarequests.MediaType, string, int) (*mediarequests.DiscoverBrowseResponse, error) {
			return nil, mediarequests.ErrNotFound
		},
	}
	h := NewRequestsHandler(svc)

	req := authedRequest("GET", "/api/v1/requests/discover/browse/studio/ghosts")
	rctx := chi.NewRouteContext()
	rctx.URLParams.Add("slug", "ghosts")
	req = req.WithContext(context.WithValue(req.Context(), chi.RouteCtxKey, rctx))

	rec := httptest.NewRecorder()
	h.HandleBrowseStudio(rec, req)

	if rec.Code != http.StatusNotFound {
		t.Fatalf("status = %d, want 404", rec.Code)
	}
}

func TestHandleBrowseGenreRequiresMediaType(t *testing.T) {
	svc := &fakeRequestService{
		browseFn: func(_ string, _ string, mt mediarequests.MediaType, _ string, _ int) (*mediarequests.DiscoverBrowseResponse, error) {
			if strings.TrimSpace(string(mt)) == "" {
				return nil, mediarequests.ErrInvalidInput
			}
			return &mediarequests.DiscoverBrowseResponse{Kind: "genre"}, nil
		},
	}
	h := NewRequestsHandler(svc)

	req := authedRequest("GET", "/api/v1/requests/discover/browse/genre/action")
	rctx := chi.NewRouteContext()
	rctx.URLParams.Add("slug", "action")
	req = req.WithContext(context.WithValue(req.Context(), chi.RouteCtxKey, rctx))

	rec := httptest.NewRecorder()
	h.HandleBrowseGenre(rec, req)

	if rec.Code != http.StatusBadRequest {
		t.Fatalf("status = %d, want 400; body=%s", rec.Code, rec.Body.String())
	}
}