package main

import (
	"context"
	"log"
	"strings"

	"github.com/kami/maven/internal/ipc"
	"github.com/kami/maven/internal/router"
	"github.com/kami/maven/internal/store"
)

// Task capture on the voice/chat path (Vikunja #130).
//
// Two halves, both deliberately small:
//
//   - captureTaskFromNote runs at the top of actionNote. An utterance that
//     explicitly files a task ("добавь в задачи купить молоко") goes to the task
//     store instead of the note store. Anything without an explicit marker is
//     still a note — see router.ParseTaskCapture for why "надо бы поспать" must
//     not become a task.
//   - queryTasks is a query source that reads the list back.
//
// Nothing here speaks unprompted. Tasks are answered when asked about; no tick
// rule reads the table.

// captureTaskFromNote claims the turn when the utterance explicitly files a
// task, returning the reply. ("", false) hands the turn back to the note path.
func (h *reactiveHandler) captureTaskFromNote(ctx context.Context, dec router.Decision) (string, bool) {
	text, ok := router.ParseTaskCapture(dec.Utterance)
	if !ok {
		return "", false
	}
	resp, err := h.api.CaptureTask(ctx, ipc.CaptureTaskReq{
		Text:   text,
		Source: "tap:voice",
		Status: store.TaskOpen, // he stated it himself — not a candidate
		Ts:     h.now(),
	})
	if err != nil {
		log.Printf("voice: capture task: %v", err)
		return "не получилось записать задачу.", true
	}
	if !resp.Created {
		return "это уже в списке.", true
	}
	return "записала: " + text, true
}

// queryTasks — "какие у меня задачи?", "что мне нужно сделать?".
//
// Reads the live set and recites it. Newest first, which is the order the store
// returns: this source has no opinion about which task matters more, and
// pretending otherwise would be a guess. Ranking is Vikunja #129.
func (h *reactiveHandler) queryTasks(ctx context.Context, t *queryTurn) (string, bool) {
	if !router.IsTaskListQuery(t.dec.Utterance) {
		return "", false
	}
	tasks, err := h.api.ListTasks(ctx, "live")
	if err != nil {
		log.Printf("voice: list tasks: %v", err)
		return "не получилось посмотреть задачи.", true
	}
	return formatTaskListRU(tasks), true
}

// formatTaskListRU renders the live task list the way Maven says it. Candidates
// are named as candidates — a task she pulled out of his mail is something she
// suggests, and saying it in the same breath as work he actually stated would
// put words in his mouth.
func formatTaskListRU(tasks []ipc.Task) string {
	var open, cands []string
	for _, t := range tasks {
		switch t.Status {
		case store.TaskCandidate:
			cands = append(cands, t.Text)
		default:
			open = append(open, t.Text)
		}
	}
	if len(open) == 0 && len(cands) == 0 {
		return "задач нет."
	}
	var b strings.Builder
	if len(open) > 0 {
		b.WriteString("в списке: ")
		b.WriteString(strings.Join(open, "; "))
		b.WriteString(".")
	}
	if len(cands) > 0 {
		if b.Len() > 0 {
			b.WriteString(" ")
		}
		b.WriteString("ещё я нашла, но ты не подтвердил: ")
		b.WriteString(strings.Join(cands, "; "))
		b.WriteString(".")
	}
	return b.String()
}