package v1

import (
	"fmt"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/gin-gonic/gin"
	"github.com/gochat/gochat/internal/model"
	"github.com/gochat/gochat/internal/repository"
	"github.com/gochat/gochat/internal/service"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/suite"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
	"gorm.io/gorm/logger"
)

type AgentCapacityHandlerTestSuite struct {
	suite.Suite
	db      *gorm.DB
	handler *AgentCapacityHandler

	account *model.Account
}

func (s *AgentCapacityHandlerTestSuite) SetupSuite() {
	gin.SetMode(gin.TestMode)
	db, err := gorm.Open(sqlite.Open("file::memory:"), &gorm.Config{
		Logger: logger.Default.LogMode(logger.Silent),
	})
	s.Require().NoError(err)
	s.Require().NoError(db.AutoMigrate(&model.Account{}, &model.User{}, &model.AgentCapacityPolicy{}))
	s.db = db

	repo := repository.NewAgentCapacityPolicyRepo(db)
	svc := service.NewAgentCapacityPolicyService(repo)
	s.handler = NewAgentCapacityHandler(svc)

	s.account = &model.Account{Name: "test-capacity-account"}
	s.Require().NoError(db.Create(s.account).Error)
}

func (s *AgentCapacityHandlerTestSuite) TearDownSuite() {
	if s.db != nil {
		sqlDB, _ := s.db.DB()
		sqlDB.Close()
	}
}

func TestAgentCapacityHandlerSuite(t *testing.T) {
	suite.Run(t, new(AgentCapacityHandlerTestSuite))
}

func (s *AgentCapacityHandlerTestSuite) TestList_Success() {
	r := gin.New()
	r.GET("/api/v1/accounts/:account_id/agent_capacity_policies", s.handler.List)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", fmt.Sprintf("/api/v1/accounts/%d/agent_capacity_policies", s.account.ID), nil)
	r.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusOK, w.Code)
}

func (s *AgentCapacityHandlerTestSuite) TestList_BadRequest_InvalidAccountID() {
	r := gin.New()
	r.GET("/api/v1/accounts/:account_id/agent_capacity_policies", s.handler.List)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", "/api/v1/accounts/abc/agent_capacity_policies", nil)
	r.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusUnauthorized, w.Code)
}

func (s *AgentCapacityHandlerTestSuite) TestCreate_BadRequest_EmptyBody() {
	r := gin.New()
	r.POST("/api/v1/accounts/:account_id/agent_capacity_policies", s.handler.Create)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("POST", fmt.Sprintf("/api/v1/accounts/%d/agent_capacity_policies", s.account.ID), nil)
	req.Header.Set("Content-Type", "application/json")
	r.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusBadRequest, w.Code)
}

func (s *AgentCapacityHandlerTestSuite) TestGet_BadRequest_InvalidID() {
	r := gin.New()
	r.GET("/api/v1/accounts/:account_id/agent_capacity_policies/:id", s.handler.Get)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", fmt.Sprintf("/api/v1/accounts/%d/agent_capacity_policies/abc", s.account.ID), nil)
	r.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusBadRequest, w.Code)
}

func (s *AgentCapacityHandlerTestSuite) TestGet_NotFound() {
	r := gin.New()
	r.GET("/api/v1/accounts/:account_id/agent_capacity_policies/:id", s.handler.Get)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", fmt.Sprintf("/api/v1/accounts/%d/agent_capacity_policies/99999", s.account.ID), nil)
	r.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusNotFound, w.Code)
}

func (s *AgentCapacityHandlerTestSuite) TestUpdate_BadRequest_InvalidID() {
	r := gin.New()
	r.PUT("/api/v1/accounts/:account_id/agent_capacity_policies/:id", s.handler.Update)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("PUT", fmt.Sprintf("/api/v1/accounts/%d/agent_capacity_policies/abc", s.account.ID), nil)
	req.Header.Set("Content-Type", "application/json")
	r.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusBadRequest, w.Code)
}

func (s *AgentCapacityHandlerTestSuite) TestDelete_BadRequest_InvalidID() {
	r := gin.New()
	r.DELETE("/api/v1/accounts/:account_id/agent_capacity_policies/:id", s.handler.Delete)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("DELETE", fmt.Sprintf("/api/v1/accounts/%d/agent_capacity_policies/abc", s.account.ID), nil)
	r.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusBadRequest, w.Code)
}