package web_test

import (
	"net/http"
	"net/url"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"git.d-ma.be/mathias/tapir/internal/adapters/chat"
	"git.d-ma.be/mathias/tapir/internal/web"
)

// The whole private transcript goes to the model chosen in the form, so the upload chat
// offers and accepts local models only, even when the shared chat service knows a cloud
// one (ADR-035 review). The cloud model here is only a name; no network is involved.

func newUploadChatAppWithCloud(t *testing.T) (*web.App, *fakeChatter) {
	t.Helper()
	app, _ := newUploadApp(t, audioOK, 200<<20)
	fc := &fakeChatter{
		models: []string{"koala/phi4-mini", "iguana/gemma4-26b", "berget/mistral-small"},
		reply:  chat.Reply{Answer: "Anders owns the timber order."},
	}
	app.Chat = fc
	app.UploadChatMaxChars = 120000
	app.UploadChatModels = []string{"koala/phi4-mini", "iguana/gemma4-26b"}
	return app, fc
}

func TestUploadChatPage_DoesNotOfferACloudModelEvenThoughTheServiceKnowsOne(t *testing.T) {
	app, _ := newUploadChatAppWithCloud(t)
	id := seedUpload(t, userID, "Roadmap sync", "done", meetingText)

	b := body(t, do(t, app, get("/uploads/"+id+"/chat")))

	assert.Contains(t, b, "iguana/gemma4-26b")
	assert.NotContains(t, b, "berget/mistral-small", "the switcher must not list a model the transcript must not be sent to")
}

func TestUploadChatPost_AForgedCloudModelIsReplacedByALocalOneBeforeTheTranscriptIsSent(t *testing.T) {
	app, fc := newUploadChatAppWithCloud(t)
	id := seedUpload(t, userID, "Roadmap sync", "done", meetingText)

	rec := do(t, app, chatPost("/uploads/"+id+"/chat", url.Values{"question": {"Who owns timber?"}, "model": {"berget/mistral-small"}}))

	require.Equal(t, http.StatusOK, rec.Code)
	require.Equal(t, 1, fc.callCount)
	assert.NotEqual(t, "berget/mistral-small", fc.gotReq.Model, "a cloud model reached the chat service with the private transcript")
	assert.Contains(t, []string{"koala/phi4-mini", "iguana/gemma4-26b"}, fc.gotReq.Model)
}

func TestUploadChatPost_ALocalModelThatIsOfferedIsHonoured(t *testing.T) {
	app, fc := newUploadChatAppWithCloud(t)
	id := seedUpload(t, userID, "Roadmap sync", "done", meetingText)

	rec := do(t, app, chatPost("/uploads/"+id+"/chat", url.Values{"question": {"q"}, "model": {"koala/phi4-mini"}}))

	require.Equal(t, http.StatusOK, rec.Code)
	assert.Equal(t, "koala/phi4-mini", fc.gotReq.Model)
}

func TestUploadChat_WithNoLocalModelConfiguredNothingIsSentAnywhere(t *testing.T) {
	app, fc := newUploadChatAppWithCloud(t)
	app.UploadChatModels = nil
	id := seedUpload(t, userID, "Roadmap sync", "done", meetingText)

	rec := do(t, app, chatPost("/uploads/"+id+"/chat", url.Values{"question": {"q"}, "model": {"berget/mistral-small"}}))

	require.Equal(t, http.StatusOK, rec.Code)
	assert.Zero(t, fc.callCount, "failing closed: no local model offered means no model is called")
}