package api

import (
	"agent-desk/internal/builders"
	"agent-desk/internal/pkg/dto/request"
	"agent-desk/internal/pkg/dto/response"
	"agent-desk/internal/pkg/httpx"
	"agent-desk/internal/pkg/i18nx"
	"agent-desk/internal/services"

	"agent-desk/internal/pkg/httpx/params"

	"github.com/gin-gonic/gin"
	"github.com/mlogclub/simple/web"
)

func ConversationGetBy(ctx *gin.Context) {
	id, ok := httpx.GetPathInt64(ctx, "id")
	if !ok {
		return
	}
	if services.ChannelService.GetEnabledChannel(ctx) == nil {
		httpx.WriteJSON(ctx, httpx.JsonErrorMsg(ctx, "error.e0211"))
		return
	}
	external := httpx.GetExternalUser(ctx)
	if external == nil {
		httpx.WriteJSON(ctx, httpx.JsonErrorMsg(ctx, "error.e0150"))
		return
	}

	item := services.ConversationService.Get(id)
	if item == nil {
		httpx.WriteJSON(ctx, httpx.JsonErrorMsg(ctx, "error.e0116"))
		return
	}
	if !services.ConversationService.IsCustomerConversationOwner(item, *external) {
		httpx.WriteJSON(ctx, httpx.JsonErrorMsg(ctx, "error.e0222"))
		return
	}

	detail := response.ConversationDetailResponse{
		ConversationResponse: builders.BuildConversationWithLocale(item, i18nx.Locale(ctx)),
		Participants:         builders.BuildParticipantResponses(id),
	}
	httpx.WriteJSON(ctx, detail)
}

func ConversationPostCreate_or_match(ctx *gin.Context) {
	channel := services.ChannelService.GetEnabledChannel(ctx)
	if channel == nil {
		httpx.WriteJSON(ctx, httpx.JsonErrorMsg(ctx, "error.e0211"))
		return
	}
	external := httpx.GetExternalUser(ctx)
	if external == nil {
		httpx.WriteJSON(ctx, httpx.JsonErrorMsg(ctx, "error.e0150"))
		return
	}

	item, err := services.ConversationService.Create(*external, channel.ID, channel.AIAgentID)
	if err != nil {
		httpx.WriteJSON(ctx, err)
		return
	}
	httpx.WriteJSON(ctx, builders.BuildConversationWithLocale(item, i18nx.Locale(ctx)))
}

// ConversationPostCreate starts a brand new request instead of rejoining the
// visitor's unfinished one, which is what the "new request" action needs.
func ConversationPostCreate(ctx *gin.Context) {
	channel := services.ChannelService.GetEnabledChannel(ctx)
	if channel == nil {
		httpx.WriteJSON(ctx, httpx.JsonErrorMsg(ctx, "error.e0211"))
		return
	}
	external := httpx.GetExternalUser(ctx)
	if external == nil {
		httpx.WriteJSON(ctx, httpx.JsonErrorMsg(ctx, "error.e0150"))
		return
	}

	// An absent body is valid: the subject is optional and the widget may post
	// nothing at all when the visitor skips the prompt.
	req := request.CreateCustomerConversationRequest{}
	if ctx.Request.ContentLength > 0 {
		if err := params.ReadJSON(ctx, &req); err != nil {
			httpx.WriteJSON(ctx, err)
			return
		}
	}

	item, err := services.ConversationService.CreateNew(*external, channel.ID, channel.AIAgentID, req.Subject)
	if err != nil {
		httpx.WriteJSON(ctx, err)
		return
	}
	httpx.WriteJSON(ctx, builders.BuildConversationWithLocale(item, i18nx.Locale(ctx)))
}

// ConversationAnyList returns the visitor's own requests so the widget can offer
// a request list. Scoping comes from the external identity, never from a
// client-supplied customer id.
func ConversationAnyList(ctx *gin.Context) {
	if services.ChannelService.GetEnabledChannel(ctx) == nil {
		httpx.WriteJSON(ctx, httpx.JsonErrorMsg(ctx, "error.e0211"))
		return
	}
	external := httpx.GetExternalUser(ctx)
	if external == nil {
		httpx.WriteJSON(ctx, httpx.JsonErrorMsg(ctx, "error.e0150"))
		return
	}

	cnd := params.NewPagedSqlCnd(ctx,
		params.QueryFilter{ParamName: "status"},
	)
	list, paging, err := services.ConversationService.ListCustomerConversations(*external, cnd)
	if err != nil {
		httpx.WriteJSON(ctx, err)
		return
	}
	locale := i18nx.Locale(ctx)
	results := make([]response.ConversationResponse, 0, len(list))
	for i := range list {
		results = append(results, builders.BuildConversationWithLocale(&list[i], locale))
	}
	httpx.WriteJSON(ctx, &web.PageResult{Results: results, Page: paging})
}

func ConversationPostClose(ctx *gin.Context) {
	if services.ChannelService.GetEnabledChannel(ctx) == nil {
		httpx.WriteJSON(ctx, httpx.JsonErrorMsg(ctx, "error.e0211"))
		return
	}
	external := httpx.GetExternalUser(ctx)
	if external == nil {
		httpx.WriteJSON(ctx, httpx.JsonErrorMsg(ctx, "error.e0150"))
		return
	}

	req := request.CloseConversationRequest{}
	if err := params.ReadJSON(ctx, &req); err != nil {
		httpx.WriteJSON(ctx, err)
		return
	}
	if err := services.ConversationService.CloseCustomerConversation(req.ConversationID, *external); err != nil {
		httpx.WriteJSON(ctx, err)
		return
	}
	httpx.WriteJSON(ctx, nil)
}

func ConversationPostSatisfaction(ctx *gin.Context) {
	if services.ChannelService.GetEnabledChannel(ctx) == nil {
		httpx.WriteJSON(ctx, httpx.JsonErrorMsg(ctx, "error.e0211"))
		return
	}
	external := httpx.GetExternalUser(ctx)
	if external == nil {
		httpx.WriteJSON(ctx, httpx.JsonErrorMsg(ctx, "error.e0150"))
		return
	}

	req := request.SubmitSatisfactionRequest{}
	if err := params.ReadJSON(ctx, &req); err != nil {
		httpx.WriteJSON(ctx, err)
		return
	}
	item, err := services.ConversationSatisfactionService.SubmitSatisfaction(req.ConversationID, *external, req.Score, req.Feedback)
	if err != nil {
		httpx.WriteJSON(ctx, err)
		return
	}
	httpx.WriteJSON(ctx, builders.BuildSatisfactionResponse(item))
}