package admin

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

	"github.com/Wei-Shaw/sub2api/internal/service"
	"github.com/gin-gonic/gin"
	"github.com/stretchr/testify/require"
)

type availableModelsAdminService struct {
	*stubAdminService
	account service.Account
}

func (s *availableModelsAdminService) GetAccount(_ context.Context, id int64) (*service.Account, error) {
	if s.account.ID == id {
		acc := s.account
		return &acc, nil
	}
	return s.stubAdminService.GetAccount(context.Background(), id)
}

func setupAvailableModelsRouter(adminSvc service.AdminService) *gin.Engine {
	gin.SetMode(gin.TestMode)
	router := gin.New()
	handler := NewAccountHandler(adminSvc, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil)
	router.GET("/api/v1/admin/accounts/:id/models", handler.GetAvailableModels)
	return router
}

func TestAccountHandlerGetAvailableModels_OpenAIOAuthUsesExplicitModelMapping(t *testing.T) {
	svc := &availableModelsAdminService{
		stubAdminService: newStubAdminService(),
		account: service.Account{
			ID:       42,
			Name:     "openai-oauth",
			Platform: service.PlatformOpenAI,
			Type:     service.AccountTypeOAuth,
			Status:   service.StatusActive,
			Credentials: map[string]any{
				"model_mapping": map[string]any{
					"gpt-5": "gpt-5.1",
				},
			},
		},
	}
	router := setupAvailableModelsRouter(svc)

	rec := httptest.NewRecorder()
	req := httptest.NewRequest(http.MethodGet, "/api/v1/admin/accounts/42/models", nil)
	router.ServeHTTP(rec, req)

	require.Equal(t, http.StatusOK, rec.Code)

	var resp struct {
		Data []struct {
			ID string `json:"id"`
		} `json:"data"`
	}
	require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
	require.Len(t, resp.Data, 1)
	require.Equal(t, "gpt-5", resp.Data[0].ID)
}

func TestAccountHandlerGetAvailableModels_OpenAIOAuthPassthroughFallsBackToDefaults(t *testing.T) {
	svc := &availableModelsAdminService{
		stubAdminService: newStubAdminService(),
		account: service.Account{
			ID:       43,
			Name:     "openai-oauth-passthrough",
			Platform: service.PlatformOpenAI,
			Type:     service.AccountTypeOAuth,
			Status:   service.StatusActive,
			Credentials: map[string]any{
				"model_mapping": map[string]any{
					"gpt-5": "gpt-5.1",
				},
			},
			Extra: map[string]any{
				"openai_passthrough": true,
			},
		},
	}
	router := setupAvailableModelsRouter(svc)

	rec := httptest.NewRecorder()
	req := httptest.NewRequest(http.MethodGet, "/api/v1/admin/accounts/43/models", nil)
	router.ServeHTTP(rec, req)

	require.Equal(t, http.StatusOK, rec.Code)

	var resp struct {
		Data []struct {
			ID string `json:"id"`
		} `json:"data"`
	}
	require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
	require.NotEmpty(t, resp.Data)
	require.NotEqual(t, "gpt-5", resp.Data[0].ID)
}

func TestAccountHandlerGetAvailableModels_KiroOAuthFallsBackToDefaults(t *testing.T) {
	svc := &availableModelsAdminService{
		stubAdminService: newStubAdminService(),
		account: service.Account{
			ID:       44,
			Name:     "kiro-oauth",
			Platform: service.PlatformKiro,
			Type:     service.AccountTypeOAuth,
			Status:   service.StatusActive,
		},
	}
	router := setupAvailableModelsRouter(svc)

	rec := httptest.NewRecorder()
	req := httptest.NewRequest(http.MethodGet, "/api/v1/admin/accounts/44/models", nil)
	router.ServeHTTP(rec, req)

	require.Equal(t, http.StatusOK, rec.Code)

	var resp struct {
		Data []struct {
			ID string `json:"id"`
		} `json:"data"`
	}
	require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
	require.NotEmpty(t, resp.Data)
	ids := make([]string, 0, len(resp.Data))
	for _, model := range resp.Data {
		ids = append(ids, model.ID)
	}
	require.True(t, slices.Contains(ids, "claude-opus-4-6"))
	require.False(t, slices.Contains(ids, "claude-opus-4-7"))
	require.False(t, slices.Contains(ids, "kiro-claude-opus-4-7"))
}

func TestAccountHandlerGetAvailableModels_KiroOAuthUsesExplicitModelMapping(t *testing.T) {
	svc := &availableModelsAdminService{
		stubAdminService: newStubAdminService(),
		account: service.Account{
			ID:       47,
			Name:     "kiro-oauth-mapped",
			Platform: service.PlatformKiro,
			Type:     service.AccountTypeOAuth,
			Status:   service.StatusActive,
			Credentials: map[string]any{
				"model_mapping": map[string]any{
					"claude-sonnet-4-6": "claude-sonnet-4.6",
					"custom-model":      "custom-upstream-model",
				},
			},
		},
	}
	router := setupAvailableModelsRouter(svc)

	rec := httptest.NewRecorder()
	req := httptest.NewRequest(http.MethodGet, "/api/v1/admin/accounts/47/models", nil)
	router.ServeHTTP(rec, req)

	require.Equal(t, http.StatusOK, rec.Code)

	var resp struct {
		Data []struct {
			ID string `json:"id"`
		} `json:"data"`
	}
	require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
	require.Len(t, resp.Data, 2)

	ids := make([]string, 0, len(resp.Data))
	for _, model := range resp.Data {
		ids = append(ids, model.ID)
	}
	require.True(t, slices.Contains(ids, "claude-sonnet-4-6"))
	require.True(t, slices.Contains(ids, "custom-model"))
	require.False(t, slices.Contains(ids, "claude-opus-4-7"))
}

func TestAccountHandlerGetAvailableModels_KiroAPIKeyUsesExplicitModelMapping(t *testing.T) {
	svc := &availableModelsAdminService{
		stubAdminService: newStubAdminService(),
		account: service.Account{
			ID:       45,
			Name:     "kiro-apikey",
			Platform: service.PlatformKiro,
			Type:     service.AccountTypeAPIKey,
			Status:   service.StatusActive,
			Credentials: map[string]any{
				"model_mapping": map[string]any{
					"claude-sonnet-4-6": "claude-sonnet-4.6",
					"custom-model":      "custom-upstream-model",
				},
			},
		},
	}
	router := setupAvailableModelsRouter(svc)

	rec := httptest.NewRecorder()
	req := httptest.NewRequest(http.MethodGet, "/api/v1/admin/accounts/45/models", nil)
	router.ServeHTTP(rec, req)

	require.Equal(t, http.StatusOK, rec.Code)

	var resp struct {
		Data []struct {
			ID string `json:"id"`
		} `json:"data"`
	}
	require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
	require.Len(t, resp.Data, 2)

	ids := make([]string, 0, len(resp.Data))
	for _, model := range resp.Data {
		ids = append(ids, model.ID)
	}
	require.True(t, slices.Contains(ids, "claude-sonnet-4-6"))
	require.True(t, slices.Contains(ids, "custom-model"))
}

func TestAccountHandlerGetAvailableModels_KiroAPIKeyWithoutMappingFallsBackToDefaults(t *testing.T) {
	svc := &availableModelsAdminService{
		stubAdminService: newStubAdminService(),
		account: service.Account{
			ID:       46,
			Name:     "kiro-apikey-defaults",
			Platform: service.PlatformKiro,
			Type:     service.AccountTypeAPIKey,
			Status:   service.StatusActive,
		},
	}
	router := setupAvailableModelsRouter(svc)

	rec := httptest.NewRecorder()
	req := httptest.NewRequest(http.MethodGet, "/api/v1/admin/accounts/46/models", nil)
	router.ServeHTTP(rec, req)

	require.Equal(t, http.StatusOK, rec.Code)

	var resp struct {
		Data []struct {
			ID string `json:"id"`
		} `json:"data"`
	}
	require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
	require.NotEmpty(t, resp.Data)
	ids := make([]string, 0, len(resp.Data))
	for _, model := range resp.Data {
		ids = append(ids, model.ID)
	}
	require.True(t, slices.Contains(ids, "claude-opus-4-6"))
	require.False(t, slices.Contains(ids, "claude-opus-4-7"))
	require.False(t, slices.Contains(ids, "kiro-claude-opus-4-7"))
}