package admin

import (
	"net/http"
	"strconv"

	"github.com/Wei-Shaw/sub2api/internal/handler/dto"
	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
	"github.com/Wei-Shaw/sub2api/internal/pkg/windsurf"
	"github.com/Wei-Shaw/sub2api/internal/service"

	"github.com/gin-gonic/gin"
)

type WindsurfHandler struct {
	authService  *service.WindsurfAuthService
	lsService    *service.WindsurfLSService
	probeService *service.WindsurfProbeService
}

func NewWindsurfHandler(
	authService *service.WindsurfAuthService,
	lsService *service.WindsurfLSService,
	probeService *service.WindsurfProbeService,
) *WindsurfHandler {
	return &WindsurfHandler{
		authService:  authService,
		lsService:    lsService,
		probeService: probeService,
	}
}

func (h *WindsurfHandler) Login(c *gin.Context) {
	var req dto.WindsurfLoginRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, err.Error())
		return
	}

	concurrency := 1
	if req.Concurrency != nil && *req.Concurrency > 0 {
		concurrency = *req.Concurrency
	}
	priority := 0
	if req.Priority != nil {
		priority = *req.Priority
	}
	probeAfter := false
	if req.ProbeAfter != nil {
		probeAfter = *req.ProbeAfter
	}

	input := &service.WindsurfLoginInput{
		Email:        req.Email,
		Password:     req.Password,
		Name:         req.Name,
		Notes:        req.Notes,
		ProxyID:      req.ProxyID,
		GroupIDs:     req.GroupIDs,
		Concurrency:  concurrency,
		Priority:     priority,
		ProbeAfter:   probeAfter,
		LSInstanceID: req.LSInstanceID,
	}

	output, err := h.authService.Login(c.Request.Context(), input)
	if err != nil {
		response.Error(c, http.StatusInternalServerError, err.Error())
		return
	}

	response.Success(c, dto.WindsurfLoginResponse{
		AccountID:           output.AccountID,
		Platform:            "windsurf",
		Type:                "windsurf-session",
		Email:               output.Email,
		Tier:                output.Tier,
		AuthMethod:          output.AuthMethod,
		APIKeyPresent:       output.APIKeyPresent,
		RefreshTokenPresent: output.RefreshTokenPresent,
	})
}

func (h *WindsurfHandler) BatchLogin(c *gin.Context) {
	var req dto.WindsurfBatchLoginRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, err.Error())
		return
	}

	concurrency := 1
	if req.Concurrency != nil && *req.Concurrency > 0 {
		concurrency = *req.Concurrency
	}
	priority := 0
	if req.Priority != nil {
		priority = *req.Priority
	}
	probeAfter := false
	if req.ProbeAfter != nil {
		probeAfter = *req.ProbeAfter
	}

	results, err := h.authService.BatchLogin(
		c.Request.Context(),
		req.Items,
		req.ProxyID,
		req.GroupIDs,
		concurrency,
		priority,
		probeAfter,
	)
	if err != nil {
		response.Error(c, http.StatusInternalServerError, err.Error())
		return
	}

	successCount := 0
	failCount := 0
	batchResults := make([]dto.WindsurfBatchLoginResult, 0, len(results))

	for _, r := range results {
		br := dto.WindsurfBatchLoginResult{
			Email:   r.Email,
			Success: r.Success,
			Error:   r.Error,
		}
		if r.Success && r.Output != nil {
			successCount++
			br.Account = &dto.WindsurfLoginResponse{
				AccountID:           r.Output.AccountID,
				Platform:            "windsurf",
				Type:                "windsurf-session",
				Email:               r.Output.Email,
				Tier:                r.Output.Tier,
				AuthMethod:          r.Output.AuthMethod,
				APIKeyPresent:       r.Output.APIKeyPresent,
				RefreshTokenPresent: r.Output.RefreshTokenPresent,
			}
		} else {
			failCount++
		}
		batchResults = append(batchResults, br)
	}

	response.Success(c, dto.WindsurfBatchLoginResponse{
		Results:      batchResults,
		Total:        len(results),
		SuccessCount: successCount,
		FailCount:    failCount,
	})
}

func (h *WindsurfHandler) RefreshToken(c *gin.Context) {
	idStr := c.Param("id")
	id, err := strconv.ParseInt(idStr, 10, 64)
	if err != nil {
		response.BadRequest(c, "invalid account id")
		return
	}

	if err := h.authService.RefreshToken(c.Request.Context(), id); err != nil {
		response.Error(c, http.StatusInternalServerError, err.Error())
		return
	}

	response.Success(c, dto.WindsurfRefreshTokenResponse{
		Refreshed: true,
	})
}

func (h *WindsurfHandler) BatchRefreshTokens(c *gin.Context) {
	var req dto.WindsurfBatchIDsRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, err.Error())
		return
	}

	successCount := 0
	failCount := 0

	for _, id := range req.AccountIDs {
		if err := h.authService.RefreshToken(c.Request.Context(), id); err != nil {
			failCount++
		} else {
			successCount++
		}
	}

	response.Success(c, gin.H{
		"total":         len(req.AccountIDs),
		"success_count": successCount,
		"fail_count":    failCount,
	})
}

func (h *WindsurfHandler) GetLSStatus(c *gin.Context) {
	if h.lsService == nil {
		response.Success(c, dto.WindsurfLSStatusResponse{
			Mode:    "disabled",
			Healthy: false,
		})
		return
	}

	status := h.lsService.Status()
	resp := dto.WindsurfLSStatusResponse{
		Mode:      status.Mode,
		Healthy:   status.Healthy,
		Instances: status.Instances,
		Endpoint:  status.Endpoint,
	}

	if dc, ok := h.lsService.Connector().(*windsurf.DockerDiscoveryConnector); ok {
		for _, inst := range dc.InstanceStatuses() {
			resp.Details = append(resp.Details, dto.WindsurfLSInstanceDetail{
				ContainerID:   inst.ContainerID,
				ContainerName: inst.ContainerName,
				Host:          inst.Host,
				Port:          inst.Port,
				Healthy:       inst.Healthy,
				DiscoveredAt:  inst.DiscoveredAt.Format("2006-01-02T15:04:05Z07:00"),
				LastProbeAt:   inst.LastProbeAt.Format("2006-01-02T15:04:05Z07:00"),
				LastProbeErr:  inst.LastProbeErr,
			})
		}
	}

	response.Success(c, resp)
}

func (h *WindsurfHandler) ListModels(c *gin.Context) {
	models := windsurf.ListModelsOpenAI()
	response.Success(c, models)
}

func (h *WindsurfHandler) Probe(c *gin.Context) {
	idStr := c.Param("id")
	id, err := strconv.ParseInt(idStr, 10, 64)
	if err != nil {
		response.BadRequest(c, "invalid account id")
		return
	}

	result, err := h.probeService.ProbeAccount(c.Request.Context(), id)
	if err != nil {
		response.Error(c, http.StatusInternalServerError, err.Error())
		return
	}

	response.Success(c, result)
}

func (h *WindsurfHandler) BatchProbe(c *gin.Context) {
	var req dto.WindsurfBatchIDsRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, err.Error())
		return
	}

	type probeResult struct {
		AccountID int64  `json:"account_id"`
		Success   bool   `json:"success"`
		Tier      string `json:"tier,omitempty"`
		Error     string `json:"error,omitempty"`
	}

	results := make([]probeResult, 0, len(req.AccountIDs))
	successCount := 0
	failCount := 0

	for _, id := range req.AccountIDs {
		r, err := h.probeService.ProbeAccount(c.Request.Context(), id)
		if err != nil {
			failCount++
			results = append(results, probeResult{AccountID: id, Error: err.Error()})
			continue
		}
		if r.Error != "" {
			failCount++
			results = append(results, probeResult{AccountID: id, Error: r.Error})
			continue
		}
		successCount++
		results = append(results, probeResult{AccountID: id, Success: true, Tier: r.Tier})
	}

	response.Success(c, gin.H{
		"results":       results,
		"total":         len(req.AccountIDs),
		"success_count": successCount,
		"fail_count":    failCount,
	})
}

func (h *WindsurfHandler) GetRuntime(c *gin.Context) {
	idStr := c.Param("id")
	id, err := strconv.ParseInt(idStr, 10, 64)
	if err != nil {
		response.BadRequest(c, "invalid account id")
		return
	}

	result, err := h.probeService.GetRuntime(c.Request.Context(), id)
	if err != nil {
		response.Error(c, http.StatusInternalServerError, err.Error())
		return
	}

	response.Success(c, result)
}