package handler

import (
	"encoding/json"
	"net/http"
	"time"

	"jimeng/client"
	"jimeng/config"
	"jimeng/model"
	"jimeng/store"
)

// Handler HTTP处理器
type Handler struct {
	client *client.Client
	store  *store.Store
	cfg    *config.Config
}

// NewHandler 创建处理器
func NewHandler(c *client.Client, s *store.Store, cfg *config.Config) *Handler {
	return &Handler{client: c, store: s, cfg: cfg}
}

// RegisterRoutes 注册路由
func (h *Handler) RegisterRoutes(mux *http.ServeMux) {
	mux.HandleFunc("/api/novel/submit", h.submitNovel)
	mux.HandleFunc("/api/novel/query", h.queryNovel)
	mux.HandleFunc("/api/video/submit", h.submitVideo)
	mux.HandleFunc("/api/video/query", h.queryVideo)
	mux.HandleFunc("/api/tasks", h.listTasks)
	mux.HandleFunc("/api/task", h.getTask)
	mux.HandleFunc("/api/task/delete", h.deleteTask)
	mux.HandleFunc("/api/testdata", h.getTestData)
}

func (h *Handler) submitNovel(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}
	var input map[string]interface{}
	if err := json.NewDecoder(r.Body).Decode(&input); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	result, err := h.client.SubmitNovelTask(input)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	// 创建本地任务记录
	task := &model.Task{
		ID:         store.GenerateID(),
		Type:       "novel",
		Capability: "pippit_novel_agent",
		Action:     getString(input, "action_key"),
		Status:     "CREATED",
		ThreadID:   getString(input, "thread_id"),
		AssetID:    getString(input, "asset_id"),
		RunID:      getString(result, "run_id"),
		Input:      input,
		CreatedAt:  time.Now(),
		UpdatedAt:  time.Now(),
	}
	if data, ok := result["data"].(map[string]interface{}); ok {
		task.Status = getString(data, "status")
		if task.RunID == "" {
			task.RunID = getString(data, "run_id")
		}
		if task.ThreadID == "" {
			task.ThreadID = getString(data, "thread_id")
		}
	}
	if err := h.store.CreateTask(task); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	// 将本地 task_id 和 run_id 注入响应
	if data, ok := result["data"].(map[string]interface{}); ok {
		if getString(data, "task_id") == "" {
			data["task_id"] = task.ID
		}
		if getString(data, "run_id") == "" {
			data["run_id"] = task.RunID
		}
	}
	json.NewEncoder(w).Encode(result)
}

func (h *Handler) queryNovel(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}
	var req struct {
		TaskID string `json:"task_id"`
		RunID  string `json:"run_id"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	result, err := h.client.QueryNovelTask(req.TaskID, req.RunID)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	// 更新本地任务状态
	if data, ok := result["data"].(map[string]interface{}); ok {
		taskID := req.TaskID
		if taskID == "" {
			// 通过run_id查找任务
			tasks := h.store.ListTasks()
			for _, t := range tasks {
				if t.RunID == req.RunID {
					taskID = t.ID
					break
				}
			}
		}
		if task, ok := h.store.GetTask(taskID); ok {
			task.Status = getString(data, "status")
			task.ThreadID = getString(data, "thread_id")
			task.UpdatedAt = time.Now()
			if usage, ok := data["usage"].(map[string]interface{}); ok {
				task.Usage = usage
			}
			if novelData, ok := data["novel_data"].(map[string]interface{}); ok {
				task.Output = novelData
			}
			h.store.UpdateTask(task)
		}
	}
	json.NewEncoder(w).Encode(result)
}

func (h *Handler) submitVideo(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}
	var req struct {
		CapabilityKey string                 `json:"capability_key"`
		Input         map[string]interface{} `json:"input"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	result, err := h.client.SubmitVideoTask(req.CapabilityKey, req.Input)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	// 创建本地任务记录
	task := &model.Task{
		ID:         store.GenerateID(),
		Type:       "video",
		Capability: req.CapabilityKey,
		Action:     "generate_video",
		Status:     "CREATED",
		RunID:      getString(result, "run_id"),
		Input:      req.Input,
		CreatedAt:  time.Now(),
		UpdatedAt:  time.Now(),
	}
	if data, ok := result["data"].(map[string]interface{}); ok {
		task.Status = getString(data, "status")
		if task.RunID == "" {
			task.RunID = getString(data, "run_id")
		}
	}
	if err := h.store.CreateTask(task); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	// 将本地 task_id 和 run_id 注入响应，确保前端能拿到
	if data, ok := result["data"].(map[string]interface{}); ok {
		if getString(data, "task_id") == "" {
			data["task_id"] = task.ID
		}
		if getString(data, "run_id") == "" {
			data["run_id"] = task.RunID
		}
	}
	json.NewEncoder(w).Encode(result)
}

func (h *Handler) queryVideo(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}
	var req struct {
		TaskID string `json:"task_id"`
		RunID  string `json:"run_id"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	result, err := h.client.QueryVideoTask(req.TaskID, req.RunID)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	// 更新本地任务状态
	if data, ok := result["data"].(map[string]interface{}); ok {
		taskID := req.TaskID
		if taskID == "" {
			tasks := h.store.ListTasks()
			for _, t := range tasks {
				if t.RunID == req.RunID {
					taskID = t.ID
					break
				}
			}
		}
		if task, ok := h.store.GetTask(taskID); ok {
			task.Status = getString(data, "status")
			task.UpdatedAt = time.Now()
			if usage, ok := data["usage"].(map[string]interface{}); ok {
				task.Usage = usage
			}
			if artifact, ok := data["video_artifact"].(map[string]interface{}); ok {
				task.Output = artifact
			}
			if errCode, ok := data["err_code"].(string); ok {
				task.ErrorCode = errCode
			}
			if errMsg, ok := data["err_msg"].(string); ok {
				task.ErrorMsg = errMsg
			}
			h.store.UpdateTask(task)
		}
	}
	json.NewEncoder(w).Encode(result)
}

func (h *Handler) listTasks(w http.ResponseWriter, r *http.Request) {
	tasks := h.store.ListTasks()
	json.NewEncoder(w).Encode(tasks)
}

func (h *Handler) getTask(w http.ResponseWriter, r *http.Request) {
	id := r.URL.Query().Get("id")
	if id == "" {
		http.Error(w, "id required", http.StatusBadRequest)
		return
	}
	task, ok := h.store.GetTask(id)
	if !ok {
		http.Error(w, "task not found", http.StatusNotFound)
		return
	}
	json.NewEncoder(w).Encode(task)
}

func (h *Handler) deleteTask(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}
	var req struct {
		ID string `json:"id"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	if err := h.store.DeleteTask(req.ID); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	w.Write([]byte(`{"success":true}`))
}

func getString(m map[string]interface{}, key string) string {
	if v, ok := m[key]; ok {
		if s, ok := v.(string); ok {
			return s
		}
	}
	return ""
}

func (h *Handler) getTestData(w http.ResponseWriter, r *http.Request) {
	resp := map[string]interface{}{
		"test_product": h.cfg.TestProduct,
		"test_model":   h.cfg.TestModel,
	}
	json.NewEncoder(w).Encode(resp)
}