package handlers

import (
	"encoding/base64"
	"encoding/json"
	"net/http"

	"git.warky.dev/wdevs/whatshooked/pkg/utils"
	"git.warky.dev/wdevs/whatshooked/pkg/whatsapp/businessapi"
	"go.mau.fi/whatsmeow/types"
)

// SendAudio sends an audio message via Business API.
// POST /api/send/audio  {"account_id","to","audio_data"(base64),"mime_type"}
func (h *Handlers) SendAudio(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	var req struct {
		AccountID string `json:"account_id"`
		To        string `json:"to"`
		AudioData string `json:"audio_data"`
		MimeType  string `json:"mime_type"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	baClient, err := h.getBusinessAPIClient(req.AccountID)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	audioData, err := base64.StdEncoding.DecodeString(req.AudioData)
	if err != nil {
		http.Error(w, "Invalid base64 audio data", http.StatusBadRequest)
		return
	}

	if req.MimeType == "" {
		req.MimeType = "audio/mpeg"
	}

	jid, err := types.ParseJID(utils.FormatPhoneToJID(req.To, h.config.Server.DefaultCountryCode))
	if err != nil {
		http.Error(w, "Invalid phone number", http.StatusBadRequest)
		return
	}

	if _, err := baClient.SendAudio(r.Context(), jid, audioData, req.MimeType); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	writeJSON(w, map[string]string{"status": "ok"})
}

// SendSticker sends a sticker message via Business API.
// POST /api/send/sticker  {"account_id","to","sticker_data"(base64),"mime_type"}
func (h *Handlers) SendSticker(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	var req struct {
		AccountID   string `json:"account_id"`
		To          string `json:"to"`
		StickerData string `json:"sticker_data"`
		MimeType    string `json:"mime_type"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	baClient, err := h.getBusinessAPIClient(req.AccountID)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	stickerData, err := base64.StdEncoding.DecodeString(req.StickerData)
	if err != nil {
		http.Error(w, "Invalid base64 sticker data", http.StatusBadRequest)
		return
	}

	if req.MimeType == "" {
		req.MimeType = "image/webp"
	}

	jid, err := types.ParseJID(utils.FormatPhoneToJID(req.To, h.config.Server.DefaultCountryCode))
	if err != nil {
		http.Error(w, "Invalid phone number", http.StatusBadRequest)
		return
	}

	if _, err := baClient.SendSticker(r.Context(), jid, stickerData, req.MimeType); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	writeJSON(w, map[string]string{"status": "ok"})
}

// SendLocation sends a location message via Business API.
// POST /api/send/location  {"account_id","to","latitude","longitude","name","address"}
func (h *Handlers) SendLocation(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	var req struct {
		AccountID string  `json:"account_id"`
		To        string  `json:"to"`
		Latitude  float64 `json:"latitude"`
		Longitude float64 `json:"longitude"`
		Name      string  `json:"name"`
		Address   string  `json:"address"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	baClient, err := h.getBusinessAPIClient(req.AccountID)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	jid, err := types.ParseJID(utils.FormatPhoneToJID(req.To, h.config.Server.DefaultCountryCode))
	if err != nil {
		http.Error(w, "Invalid phone number", http.StatusBadRequest)
		return
	}

	if _, err := baClient.SendLocation(r.Context(), jid, req.Latitude, req.Longitude, req.Name, req.Address); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	writeJSON(w, map[string]string{"status": "ok"})
}

// SendContacts sends contact card(s) via Business API.
// POST /api/send/contacts  {"account_id","to","contacts":[...]}
func (h *Handlers) SendContacts(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	var req struct {
		AccountID string                          `json:"account_id"`
		To        string                          `json:"to"`
		Contacts  []businessapi.SendContactObject `json:"contacts"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	if len(req.Contacts) == 0 {
		http.Error(w, "at least one contact is required", http.StatusBadRequest)
		return
	}

	baClient, err := h.getBusinessAPIClient(req.AccountID)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	jid, err := types.ParseJID(utils.FormatPhoneToJID(req.To, h.config.Server.DefaultCountryCode))
	if err != nil {
		http.Error(w, "Invalid phone number", http.StatusBadRequest)
		return
	}

	if _, err := baClient.SendContacts(r.Context(), jid, req.Contacts); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	writeJSON(w, map[string]string{"status": "ok"})
}

// SendInteractive sends an interactive message (buttons, list, or flow).
// POST /api/send/interactive  {"account_id","to","interactive":{...}}
func (h *Handlers) SendInteractive(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	var req struct {
		AccountID   string                         `json:"account_id"`
		To          string                         `json:"to"`
		Interactive *businessapi.InteractiveObject `json:"interactive"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	if req.Interactive == nil {
		http.Error(w, "interactive object is required", http.StatusBadRequest)
		return
	}

	baClient, err := h.getBusinessAPIClient(req.AccountID)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	jid, err := types.ParseJID(utils.FormatPhoneToJID(req.To, h.config.Server.DefaultCountryCode))
	if err != nil {
		http.Error(w, "Invalid phone number", http.StatusBadRequest)
		return
	}

	if _, err := baClient.SendInteractive(r.Context(), jid, req.Interactive); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	writeJSON(w, map[string]string{"status": "ok"})
}

// SendReaction sends a reaction (emoji) to an existing message.
// POST /api/send/reaction  {"account_id","to","message_id","emoji"}
func (h *Handlers) SendReaction(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	var req struct {
		AccountID string `json:"account_id"`
		To        string `json:"to"`
		MessageID string `json:"message_id"`
		Emoji     string `json:"emoji"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	if req.MessageID == "" || req.Emoji == "" {
		http.Error(w, "message_id and emoji are required", http.StatusBadRequest)
		return
	}

	baClient, err := h.getBusinessAPIClient(req.AccountID)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	jid, err := types.ParseJID(utils.FormatPhoneToJID(req.To, h.config.Server.DefaultCountryCode))
	if err != nil {
		http.Error(w, "Invalid phone number", http.StatusBadRequest)
		return
	}

	if err := baClient.SendReaction(r.Context(), jid, req.MessageID, req.Emoji); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	writeJSON(w, map[string]string{"status": "ok"})
}

// MarkAsRead marks a received message as read.
// POST /api/messages/read  {"account_id","message_id"}
func (h *Handlers) MarkAsRead(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	var req struct {
		AccountID string `json:"account_id"`
		MessageID string `json:"message_id"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	if req.MessageID == "" {
		http.Error(w, "message_id is required", http.StatusBadRequest)
		return
	}

	baClient, err := h.getBusinessAPIClient(req.AccountID)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	if err := baClient.MarkAsRead(r.Context(), req.MessageID); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	writeJSON(w, map[string]string{"status": "ok"})
}