package hitl

import "fmt"

// Strings holds every user-facing text of the bot. The language is chosen once at start (HITL_LANG=en|ja).
// Identifiers (action ids, labels, run ids, JSON) stay as they are; only the surrounding text changes.
type Strings struct {
	ProposalTitle       func(actionID string) string
	FieldRootCause      string
	FieldTarget         string
	FieldEvidence       string
	FieldRationale      string
	FieldRun            string
	FieldStatus         string
	FieldResult         string
	FieldAlert          string
	RootCauseValue      func(label string, conf float64) string
	ButtonApprove       string
	ButtonReject        string
	StatusWaiting       func(unixTS int64) string
	StatusRejected      func(by string) string
	StatusExecuting     func(by string) string
	StatusExecuted      func(by string) string
	StatusApproveFailed func(err string) string
	StatusExecFailed    func(by, err string) string
	StatusExpiredBefore string
	StatusNoDecision    string
	StatusApprovedAPI   func(by string, executed bool) string
	ExpiryMessage       func(actionID, target, runID, scenarioID string) string
	EscalationTitle     func(label string) string
	EscalationStatus    string
	ThreadRunbook       string
	NotAllowed          string
	Footer              func(model, prompt, session string) string
	Empty               string
}

var langs = map[string]Strings{
	"en": {
		ProposalTitle:  func(a string) string { return "Layer-2 proposal: " + a },
		FieldRootCause: "Root cause", FieldTarget: "Target", FieldEvidence: "Evidence", FieldRationale: "Rationale",
		FieldRun: "Run / scenario", FieldStatus: "Status", FieldResult: "Result", FieldAlert: "Alert",
		RootCauseValue: func(l string, c float64) string { return fmt.Sprintf("%s (confidence %.2f)", l, c) },
		ButtonApprove:  "Approve", ButtonReject: "Reject",
		StatusWaiting:       func(t int64) string { return fmt.Sprintf("waiting for approval until <t:%d:T>", t) },
		StatusRejected:      func(by string) string { return "rejected by " + by },
		StatusExecuting:     func(by string) string { return "approved by " + by + ", executing..." },
		StatusExecuted:      func(by string) string { return "approved by " + by + "; executed" },
		StatusApproveFailed: func(e string) string { return "approval failed: " + e },
		StatusExecFailed:    func(by, e string) string { return "approved by " + by + "; execution failed: " + e },
		StatusExpiredBefore: "expired before approval",
		StatusApprovedAPI: func(by string, executed bool) string {
			if executed {
				return "approved through the harness API by " + by + "; executed"
			}
			return "approved through the harness API by " + by
		},
		StatusNoDecision: "no decision within the window; moved to layer 3",
		ExpiryMessage: func(a, t, r, s string) string {
			return fmt.Sprintf("Proposal `%s` for `%s` (run %s, scenario %s) received no decision within the approval window. Layer 3: follow the runbook or call the harness `/actions/execute` with the operator token.", a, t, r, s)
		},
		EscalationTitle:  func(l string) string { return "Escalation: " + l },
		EscalationStatus: "layer 3: human decision required",
		ThreadRunbook:    "Runbook:\n",
		NotAllowed:       "You are not in the approver role.",
		Footer:           func(m, p, s string) string { return fmt.Sprintf("model %s, prompt %s, session %s", m, p, s) },
		Empty:            "-",
	},
	"ja": {
		ProposalTitle:  func(a string) string { return "第2層の提案: " + a },
		FieldRootCause: "推定原因", FieldTarget: "対象", FieldEvidence: "根拠", FieldRationale: "判断理由",
		FieldRun: "Run / シナリオ", FieldStatus: "状態", FieldResult: "実行結果", FieldAlert: "アラート",
		RootCauseValue: func(l string, c float64) string { return fmt.Sprintf("%s（確信度 %.2f）", l, c) },
		ButtonApprove:  "承認", ButtonReject: "却下",
		StatusWaiting:       func(t int64) string { return fmt.Sprintf("承認待ち（期限 <t:%d:T>）", t) },
		StatusRejected:      func(by string) string { return by + " が却下" },
		StatusExecuting:     func(by string) string { return by + " が承認、実行中..." },
		StatusExecuted:      func(by string) string { return by + " が承認、実行済み" },
		StatusApproveFailed: func(e string) string { return "承認の記録に失敗: " + e },
		StatusExecFailed:    func(by, e string) string { return by + " が承認したが実行に失敗: " + e },
		StatusExpiredBefore: "承認前に期限切れ",
		StatusApprovedAPI: func(by string, executed bool) string {
			if executed {
				return by + " がハーネス API で承認、実行済み"
			}
			return by + " がハーネス API で承認"
		},
		StatusNoDecision: "期限内に判断がなかったため第3層へ引き継ぎ",
		ExpiryMessage: func(a, t, r, s string) string {
			return fmt.Sprintf("提案 `%s`（対象 `%s`、run %s、シナリオ %s）は承認期限内に判断されませんでした。第3層の対応です。ランブックに従って手動で対処するか、オペレーター用トークンでハーネスの `/actions/execute` を呼び出してください。", a, t, r, s)
		},
		EscalationTitle:  func(l string) string { return "エスカレーション: " + l },
		EscalationStatus: "第3層: 人の判断が必要",
		ThreadRunbook:    "ランブック:\n",
		NotAllowed:       "承認ロールが付与されていません。",
		Footer: func(m, p, s string) string {
			return fmt.Sprintf("モデル %s、プロンプト %s、セッション %s", m, p, s)
		},
		Empty: "-",
	},
}

// Lang returns the string set for a language code; unknown codes fall back to English.
func Lang(code string) Strings {
	if s, ok := langs[code]; ok {
		return s
	}
	return langs["en"]
}