package handlers

import (
	"bytes"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/gin-gonic/gin"

	"git.gobha.me/xcaliber/chat-switchboard/providers"
)

func init() {
	gin.SetMode(gin.TestMode)
	providers.Init()
}

func TestCreateConfigMissingFields(t *testing.T) {
	h := NewAPIConfigHandler()
	r := gin.New()
	r.POST("/api-configs", func(c *gin.Context) {
		c.Set("user_id", "test-user")
		h.CreateConfig(c)
	})

	tests := []struct {
		name string
		body string
	}{
		{"missing name", `{"provider":"openai","endpoint":"http://x"}`},
		{"missing provider", `{"name":"Test","endpoint":"http://x"}`},
		{"missing endpoint", `{"name":"Test","provider":"openai"}`},
		{"empty body", `{}`},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			w := httptest.NewRecorder()
			req, _ := http.NewRequest("POST", "/api-configs",
				bytes.NewBufferString(tt.body))
			req.Header.Set("Content-Type", "application/json")
			r.ServeHTTP(w, req)

			if w.Code != http.StatusBadRequest {
				t.Errorf("Expected 400, got %d (body: %s)", w.Code, w.Body.String())
			}
		})
	}
}

func TestCreateConfigInvalidProvider(t *testing.T) {
	h := NewAPIConfigHandler()
	r := gin.New()
	r.POST("/api-configs", func(c *gin.Context) {
		c.Set("user_id", "test-user")
		h.CreateConfig(c)
	})

	body := `{"name":"Test","provider":"nonexistent","endpoint":"http://x"}`
	w := httptest.NewRecorder()
	req, _ := http.NewRequest("POST", "/api-configs",
		bytes.NewBufferString(body))
	req.Header.Set("Content-Type", "application/json")
	r.ServeHTTP(w, req)

	if w.Code != http.StatusBadRequest {
		t.Errorf("Expected 400 for invalid provider, got %d", w.Code)
	}

	var resp map[string]interface{}
	json.Unmarshal(w.Body.Bytes(), &resp)

	if _, ok := resp["supported_providers"]; !ok {
		t.Error("Expected supported_providers in error response")
	}
}

func TestCompletionHandlerMissingFields(t *testing.T) {
	h := NewCompletionHandler()
	r := gin.New()
	r.POST("/chat/completions", func(c *gin.Context) {
		c.Set("user_id", "test-user")
		h.Complete(c)
	})

	tests := []struct {
		name string
		body string
	}{
		{"missing chat_id", `{"content":"hello"}`},
		{"missing content", `{"chat_id":"abc"}`},
		{"empty body", `{}`},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			w := httptest.NewRecorder()
			req, _ := http.NewRequest("POST", "/chat/completions",
				bytes.NewBufferString(tt.body))
			req.Header.Set("Content-Type", "application/json")
			r.ServeHTTP(w, req)

			if w.Code != http.StatusBadRequest {
				t.Errorf("Expected 400, got %d (body: %s)", w.Code, w.Body.String())
			}
		})
	}
}

func TestSupportedProviders(t *testing.T) {
	ids := providers.List()

	expected := map[string]bool{
		"openai":    false,
		"anthropic": false,
	}

	for _, id := range ids {
		if _, ok := expected[id]; ok {
			expected[id] = true
		}
	}

	for name, found := range expected {
		if !found {
			t.Errorf("Expected provider %s to be registered", name)
		}
	}
}