package coordinator

import (
	"chat-agent-system/internal/contracts/vocabulary"
	"context"
	"fmt"
	"strconv"
	"strings"
	"time"

	"chat-agent-system/internal/intent"
)

// handleDocGovReject 处理受控文档审核/批准驳回与二次确认交互卡片挂载（角色硬门禁）
func (e *CoordinatorEngine) handleDocGovReject(ctx context.Context, cand *intent.CandidateIntent, userCtx *UserProjectContext) (*CoordinationResult, error) {
	docName := cand.FilledSlots[intent.SlotTargetDoc]
	if docName == "" {
		if userCtx.InteractiveCard != nil && userCtx.InteractiveCard.TargetDocID != "" {
			docName = userCtx.InteractiveCard.TargetDocID
		} else {
			docName = "当前受控文档"
		}
	}

	rawReason := cand.FilledSlots[intent.SlotRejectReason]
	section := cand.FilledSlots[intent.SlotTargetSection]
	if section == "" {
		section = extractSectionClues(rawReason)
	}

	role := effectiveDocRole(userCtx)
	isFinal := cand.Intent == intent.IntentDocGovFinalReject

	// 与批准对称的硬门禁
	if isFinal {
		if !isApproverAuthorized(userCtx.User) && role != "approver" {
			return &CoordinationResult{
				Status:         StatusRejected,
				Intent:         cand.Intent,
				Branch:         cand.Branch,
				RejectReason:   "UNAUTHORIZED_REJECT_ROLE",
				NaturalReply:   fmt.Sprintf("权限不足：终审驳回需批准人角色。当前您的身份为「%s」。若需了解驳回原因，可直接询问。", roleLabelCN(role)),
				UpdatedContext: userCtx,
			}, nil
		}
	} else {
		if !isReviewerAuthorized(userCtx.User) && role != "reviewer" {
			return &CoordinationResult{
				Status:         StatusRejected,
				Intent:         cand.Intent,
				Branch:         cand.Branch,
				RejectReason:   "UNAUTHORIZED_REJECT_ROLE",
				NaturalReply:   fmt.Sprintf("权限不足：审核驳回需审核人角色。当前您的身份为「%s」。若需了解驳回原因，可直接询问「被驳回的原因是什么」。", roleLabelCN(role)),
				UpdatedContext: userCtx,
			}, nil
		}
	}

	// 规范化策略角色（授权通过后按意图选审核/批准确认卡）
	policyRole := role
	if isFinal {
		policyRole = "approver"
	} else if policyRole != "reviewer" && isReviewerAuthorized(userCtx.User) {
		policyRole = "reviewer"
	}

	lifecycle := "reviewing"
	if isFinal {
		lifecycle = "approving"
	}

	resolved := ResolveRejectCard(policyRole, lifecycle, docName, docName, section, rawReason, RejectUtteranceExecute)
	if resolved.Kind == "deny_text" || resolved.Card == nil {
		return &CoordinationResult{
			Status:         StatusRejected,
			Intent:         cand.Intent,
			Branch:         cand.Branch,
			RejectReason:   resolved.DenyReason,
			NaturalReply:   resolved.Reply,
			UpdatedContext: userCtx,
		}, nil
	}

	userCtx.applyCard(resolved.Card)
	userCtx.applyPending(resolved.Expectation)

	return &CoordinationResult{
		Status:          StatusAccepted,
		Intent:          cand.Intent,
		Branch:          cand.Branch,
		NaturalReply:    resolved.Reply,
		InteractiveCard: resolved.Card,
		NextExpectation: resolved.Expectation,
		UpdatedContext:  userCtx,
	}, nil
}

// isReviewerAuthorized 校验审核人或主导工程师权限
func isReviewerAuthorized(u UserInfo) bool {
	r := strings.ToLower(strings.TrimSpace(u.Role))
	pr := strings.ToLower(strings.TrimSpace(u.ProjectRole))
	return r == "reviewer" || pr == "reviewer" ||
		r == "lead_engineer" || pr == "lead_engineer" ||
		strings.Contains(pr, "审核") || strings.Contains(r, "审核") ||
		strings.Contains(pr, "主导") || strings.Contains(r, "主导")
}

// isApproverAuthorized 校验批准人或项目经理权限
func isApproverAuthorized(u UserInfo) bool {
	r := strings.ToLower(strings.TrimSpace(u.Role))
	pr := strings.ToLower(strings.TrimSpace(u.ProjectRole))
	return r == "approver" || pr == "approver" ||
		r == "project_manager" || pr == "project_manager" ||
		strings.Contains(pr, "批准") || strings.Contains(r, "批准") ||
		strings.Contains(pr, "总监") || strings.Contains(r, "总监") ||
		r == "director"
}

// handleDocGovApprove 处理受控文档审核/批准通过与终审批准二次确认
func (e *CoordinatorEngine) handleDocGovApprove(ctx context.Context, cand *intent.CandidateIntent, userCtx *UserProjectContext) (*CoordinationResult, error) {
	docName := cand.FilledSlots[intent.SlotTargetDoc]
	if docName == "" {
		if userCtx.InteractiveCard != nil && userCtx.InteractiveCard.TargetDocID != "" {
			docName = userCtx.InteractiveCard.TargetDocID
		} else {
			docName = "当前受控文档"
		}
	}

	currentRole := userCtx.User.ProjectRole
	if currentRole == "" {
		currentRole = userCtx.User.Role
	}
	if currentRole == "" {
		currentRole = "未知角色"
	}

	isFinal := cand.Intent == intent.IntentDocGovFinalApprove

	if isFinal {
		// 校验终审批准权限: approver 或 project_manager
		if !isApproverAuthorized(userCtx.User) {
			return &CoordinationResult{
				Status:         StatusRejected,
				Intent:         cand.Intent,
				Branch:         cand.Branch,
				RejectReason:   "UNAUTHORIZED_APPROVAL_ROLE",
				NaturalReply:   fmt.Sprintf("权限不足：受控文档终审批准需要批准人 (approver) 或项目经理 (project_manager) 权限。当前您的身份为「%s」，无权执行终审批准操作。", currentRole),
				UpdatedContext: userCtx,
			}, nil
		}

		cardID := fmt.Sprintf("card_final_appr_%d", time.Now().UnixNano())
		cardPayload := &intent.InteractiveCardPayload{
			CardID:          cardID,
			CardType:        "CONFIRMATION",
			Title:           "受控文档终审批准生效确认",
			TargetDocID:     docName,
			TargetDocTitle:  fmt.Sprintf("《%s》", docName),
			ProposedContent: "正式终审批准受控文档，签署电子签名并受控归档生效",
			ImpactRisk:      "终审批准后文档正文将永久锁定为基线版本，后续非受控修改将被严格拦截，任何变更必须走变更审批流程",
			CurrentStatus:   "active",
			TTLTurns:        3,
			CreatedAt:       time.Now(),
			Actions: []intent.CardAction{
				{
					ActionID:             "confirm_final_approve",
					Label:                "确认终审批准生效",
					Style:                "primary",
					IsAffirmativeDefault: true,
					Payload: map[string]string{
						"target_doc":    docName,
						"target_action": "confirm_final_approve",
					},
				},
				{
					ActionID: "cancel",
					Label:    "取消",
					Style:    "subtle",
					Payload: map[string]string{
						"action": "cancel",
					},
				},
			},
		}

		nextExp := &intent.PendingExpectation{
			ExpectationID:    "exp_" + cardPayload.CardID,
			ExpectedIntent:   intent.IntentDocGovProposalDecide,
			TargetAction:     "confirm_final_approve",
			Prompt:           "请确认是否执行终审批准操作",
			AffirmativeWord:  "确认",
			DeclineWord:      "取消",
			ExpiresAt:        time.Now().Add(5 * time.Minute),
			Payload:          cardPayload.Actions[0].Payload,
			AllowAffirmative: true,
			CreatedAt:        time.Now(),
			DefaultOption: &intent.ExpectationOption{
				OptionID: "confirm_final_approve",
				Title:    "确认终审批准生效",
				Intent:   intent.IntentDocGovProposalDecide,
				Slots:    cardPayload.Actions[0].Payload,
			},
		}

		userCtx.applyCard(cardPayload)
		userCtx.applyPending(nextExp)

		reply := fmt.Sprintf("已为您起草针对《%s》的终审批准确认单。终审批准将使文档正式归档并永久锁定，请审阅下方卡片并在确认无误后点击确认或回复‘确认’。", docName)

		return &CoordinationResult{
			Status:          StatusAccepted,
			Intent:          cand.Intent,
			Branch:          cand.Branch,
			NaturalReply:    reply,
			InteractiveCard: cardPayload,
			NextExpectation: nextExp,
			UpdatedContext:  userCtx,
		}, nil
	}

	// 校验审核通过权限: reviewer 或 lead_engineer
	if !isReviewerAuthorized(userCtx.User) {
		return &CoordinationResult{
			Status:         StatusRejected,
			Intent:         cand.Intent,
			Branch:         cand.Branch,
			RejectReason:   "UNAUTHORIZED_REVIEW_ROLE",
			NaturalReply:   fmt.Sprintf("权限不足：受控文档审核通过需要审核人 (reviewer) 或主导工程师 (lead_engineer) 权限。当前您的身份为「%s」，无权执行审核通过操作。", currentRole),
			UpdatedContext: userCtx,
		}, nil
	}

	reply := fmt.Sprintf("正在处理您对《%s》的审核通过请求…", docName)

	return e.applyNarrative(ctx, userCtx, "handleDocGovApprove", "", "这是审核通过请求的受理通报。必须保留文档名，并说明正在处理，不得宣称已经批准归档。", &CoordinationResult{
		Status:         StatusAccepted,
		Intent:         cand.Intent,
		Branch:         cand.Branch,
		NaturalReply:   reply,
		UpdatedContext: userCtx,
		PendingAction: &PendingAction{
			Kind:    "docgov.review_approve",
			DocID:   docName,
			Comment: cand.FilledSlots[intent.SlotRejectReason],
		},
	}), nil
}

// handleDocGovClaim 解析门 → 确认卡 → 拍板后 PendingAction(docgov.claim)
func (e *CoordinatorEngine) handleDocGovClaim(ctx context.Context, cand *intent.CandidateIntent, userCtx *UserProjectContext) (*CoordinationResult, error) {
	doc, gate := e.resolveTargetDocGate(ctx, cand, userCtx)
	if gate != nil {
		return gate, nil
	}
	title := displayDocTitle(doc)
	card, exp := buildConfirmCard(
		"受控文档认领确认",
		doc.DocID, title, "",
		"确认认领该文档并开始编制责任",
		"认领将记录您已查看并承接该文档的编制责任；不会静默选择其他文档。",
		"confirm_claim", "确认认领",
		map[string]string{"task_key": doc.TaskKey},
	)
	userCtx.applyCard(card)
	userCtx.applyPending(exp)
	reply := fmt.Sprintf("已为《%s》起草认领确认单。请确认文档无误后点击确认或回复「确认」。", title)
	return &CoordinationResult{
		Status:          StatusAccepted,
		Intent:          cand.Intent,
		Branch:          cand.Branch,
		NaturalReply:    reply,
		InteractiveCard: card,
		NextExpectation: exp,
		UpdatedContext:  userCtx,
	}, nil
}

// handleDocGovSubmitReview 解析门 → drafting 校验 → CONFIRMATION 卡（含锁定后果）→ 拍板后 PendingAction
func (e *CoordinatorEngine) handleDocGovSubmitReview(ctx context.Context, cand *intent.CandidateIntent, userCtx *UserProjectContext) (*CoordinationResult, error) {
	doc, gate := e.resolveTargetDocGate(ctx, cand, userCtx)
	if gate != nil {
		return gate, nil
	}
	state := doc.State
	// ContextSnapshot hardcodes DocLifecycleState="reviewing" whenever an interactive
	// card has ActiveDocID — do not treat that as authoritative unless the resolver
	// already supplied a real lifecycle state.
	if state != "" && state != vocabulary.StateDrafting {
		return &CoordinationResult{
			Status:         StatusRejected,
			Intent:         cand.Intent,
			Branch:         cand.Branch,
			RejectReason:   "SUBMIT_STATE_DENIED",
			NaturalReply:   fmt.Sprintf("当前文档处于「%s」阶段，仅编制中(drafting)可送审。", state),
			UpdatedContext: userCtx,
		}, nil
	}
	title := displayDocTitle(doc)
	card, exp := buildConfirmCard(
		"受控文档送审确认",
		doc.DocID, title, "",
		"编制完成，提交审核并锁定正文",
		"送审后文档进入审核锁定：非审核职责人不可改正文；锁定期间补充将进入积压台账，待退回编制后再消化。",
		"confirm_submit_review", "确认送审",
		map[string]string{"task_key": doc.TaskKey},
	)
	userCtx.applyCard(card)
	userCtx.applyPending(exp)
	reply := fmt.Sprintf("已为《%s》起草送审确认单。送审将锁定正文并通知审核人，请确认无误后点击确认或回复「确认」。", title)
	return &CoordinationResult{
		Status:          StatusAccepted,
		Intent:          cand.Intent,
		Branch:          cand.Branch,
		NaturalReply:    reply,
		InteractiveCard: card,
		NextExpectation: exp,
		UpdatedContext:  userCtx,
	}, nil
}

// handleDocGovProposalDecide 处理智能体修改建议与提案裁决，以及驳回/终审批准确认执行
func (e *CoordinatorEngine) handleDocGovProposalDecide(ctx context.Context, cand *intent.CandidateIntent, userCtx *UserProjectContext) (*CoordinationResult, error) {
	targetAction := cand.FilledSlots["target_action"]
	if targetAction == "" {
		targetAction = cand.FilledSlots["action"]
	}
	if targetAction == "" && cand.MatchedOption != nil {
		targetAction = cand.MatchedOption.OptionID
	}

	docName := cand.FilledSlots[intent.SlotTargetDoc]
	if docName == "" && userCtx.InteractiveCard != nil && userCtx.InteractiveCard.TargetDocID != "" {
		docName = userCtx.InteractiveCard.TargetDocID
	}
	if docName == "" {
		docName = "当前受控文档"
	}

	if targetAction == "confirm_reject" {
		reason := cand.FilledSlots[intent.SlotRejectReason]
		if reason == "" && userCtx.InteractiveCard != nil {
			reason = userCtx.InteractiveCard.ProposedContent
		}

		if userCtx.InteractiveCard != nil {
			userCtx.dismissCard("resolved")
		}
		userCtx.applyPending(nil)

		rollback := vocabulary.StateDrafting
		if userCtx.InteractiveCard != nil && strings.Contains(userCtx.InteractiveCard.ImpactRisk, "reviewing") {
			rollback = vocabulary.StateDrafting
		}

		return e.applyNarrative(ctx, userCtx, "handleDocGovProposalDecide", "", "这是已确认或已取消后的受理通报。必须保留文档名与动作边界，不得把受理说成已经归档生效。", &CoordinationResult{
			Status:           StatusAccepted,
			Intent:           cand.Intent,
			Branch:           cand.Branch,
			NaturalReply:     fmt.Sprintf("正在处理您对《%s》的驳回确认…", docName),
			UpdatedContext:   userCtx,
			ClearExpectation: true,
			PendingAction: &PendingAction{
				Kind:     "docgov.reject",
				DocID:    docName,
				Reason:   reason,
				Rollback: rollback,
			},
		}), nil
	}

	if targetAction == "confirm_final_approve" {
		if userCtx.InteractiveCard != nil {
			userCtx.dismissCard("resolved")
		}
		userCtx.applyPending(nil)

		return e.applyNarrative(ctx, userCtx, "handleDocGovProposalDecide", "", "这是已确认或已取消后的受理通报。必须保留文档名与动作边界，不得把受理说成已经归档生效。", &CoordinationResult{
			Status:           StatusAccepted,
			Intent:           cand.Intent,
			Branch:           cand.Branch,
			NaturalReply:     fmt.Sprintf("正在处理您对《%s》的终审批准…", docName),
			UpdatedContext:   userCtx,
			ClearExpectation: true,
			PendingAction: &PendingAction{
				Kind:  "docgov.approver_approve",
				DocID: docName,
			},
		}), nil
	}

	if targetAction == "confirm_claim" {
		payload := mergeDecidePayload(cand, userCtx)
		if userCtx.InteractiveCard != nil {
			userCtx.dismissCard("resolved")
		}
		userCtx.applyPending(nil)
		return e.applyNarrative(ctx, userCtx, "handleDocGovProposalDecide", "", "这是已确认或已取消后的受理通报。必须保留文档名与动作边界，不得把受理说成已经归档生效。", &CoordinationResult{
			Status:           StatusAccepted,
			Intent:           cand.Intent,
			Branch:           cand.Branch,
			NaturalReply:     fmt.Sprintf("正在处理《%s》的认领…", docName),
			UpdatedContext:   userCtx,
			ClearExpectation: true,
			PendingAction: &PendingAction{
				Kind:    "docgov.claim",
				DocID:   docName,
				TaskKey: payload["task_key"],
			},
		}), nil
	}

	if targetAction == "confirm_submit_review" {
		payload := mergeDecidePayload(cand, userCtx)
		if userCtx.InteractiveCard != nil {
			userCtx.dismissCard("resolved")
		}
		userCtx.applyPending(nil)
		taskKey := payload["task_key"]
		return e.applyNarrative(ctx, userCtx, "handleDocGovProposalDecide", "", "这是已确认或已取消后的受理通报。必须保留文档名与动作边界，不得把受理说成已经归档生效。", &CoordinationResult{
			Status: StatusAccepted, Intent: cand.Intent, Branch: cand.Branch,
			NaturalReply:     fmt.Sprintf("正在处理《%s》的送审…", docName),
			UpdatedContext:   userCtx,
			ClearExpectation: true,
			PendingAction:    &PendingAction{Kind: "docgov.submit_review", DocID: docName, TaskKey: taskKey},
		}), nil
	}

	if targetAction == "confirm_workflow_run" {
		payload := mergeDecidePayload(cand, userCtx)
		if userCtx.InteractiveCard != nil {
			userCtx.dismissCard("resolved")
		}
		userCtx.applyPending(nil)
		wfKey := payload[intent.SlotTargetWorkflow]
		if wfKey == "" {
			wfKey = payload["workflow_key"]
		}
		if wfKey == "" && userCtx != nil {
			wfKey = userCtx.Project.ActiveWorkflowKey
		}
		if wfKey == "" {
			wfKey = "main"
		}
		return e.applyNarrative(ctx, userCtx, "handleDocGovProposalDecide", "", "这是已确认或已取消后的受理通报。必须保留文档名与动作边界，不得把受理说成已经归档生效。", &CoordinationResult{
			Status:           StatusAccepted,
			Intent:           cand.Intent,
			Branch:           cand.Branch,
			NaturalReply:     fmt.Sprintf("正在启动工作流「%s」…", workflowDisplayName(wfKey)),
			UpdatedContext:   userCtx,
			ClearExpectation: true,
			PendingAction: &PendingAction{
				Kind:        "workflow.run",
				WorkflowKey: wfKey,
			},
		}), nil
	}

	if targetAction == "confirm_comment_add" {
		payload := mergeDecidePayload(cand, userCtx)
		if userCtx.InteractiveCard != nil {
			userCtx.dismissCard("resolved")
		}
		userCtx.applyPending(nil)
		return e.applyNarrative(ctx, userCtx, "handleDocGovProposalDecide", "", "这是已确认或已取消后的受理通报。必须保留文档名与动作边界，不得把受理说成已经归档生效。", &CoordinationResult{
			Status: StatusAccepted, Intent: cand.Intent, Branch: cand.Branch,
			NaturalReply:   fmt.Sprintf("正在为《%s》添加批注…", docName),
			UpdatedContext: userCtx, ClearExpectation: true,
			PendingAction: &PendingAction{
				Kind:    "docgov.comment_add",
				DocID:   docName,
				Role:    payload["role"],
				Section: payload["target_section"],
				Comment: payload["comment_content"],
				Reason:  payload["comment_type"],
			},
		}), nil
	}

	if targetAction == "confirm_comment_resolve" {
		payload := mergeDecidePayload(cand, userCtx)
		if userCtx.InteractiveCard != nil {
			userCtx.dismissCard("resolved")
		}
		userCtx.applyPending(nil)
		return e.applyNarrative(ctx, userCtx, "handleDocGovProposalDecide", "", "这是已确认或已取消后的受理通报。必须保留文档名与动作边界，不得把受理说成已经归档生效。", &CoordinationResult{
			Status: StatusAccepted, Intent: cand.Intent, Branch: cand.Branch,
			NaturalReply:   fmt.Sprintf("正在解决《%s》的批注…", docName),
			UpdatedContext: userCtx, ClearExpectation: true,
			PendingAction: &PendingAction{
				Kind:    "docgov.comment_resolve",
				DocID:   docName,
				Role:    payload["role"],
				Section: payload["target_section"],
			},
		}), nil
	}

	if targetAction == "confirm_reopen_request" {
		payload := mergeDecidePayload(cand, userCtx)
		if userCtx.InteractiveCard != nil {
			userCtx.dismissCard("resolved")
		}
		userCtx.applyPending(nil)
		return e.applyNarrative(ctx, userCtx, "handleDocGovProposalDecide", "", "这是已确认或已取消后的受理通报。必须保留文档名与动作边界，不得把受理说成已经归档生效。", &CoordinationResult{
			Status: StatusAccepted, Intent: cand.Intent, Branch: cand.Branch,
			NaturalReply:   fmt.Sprintf("正在提交《%s》的重开申请…", docName),
			UpdatedContext: userCtx, ClearExpectation: true,
			PendingAction: &PendingAction{
				Kind:    "docgov.reopen_request",
				DocID:   docName,
				TaskKey: payload["task_key"],
				Reason:  payload["reopen_reason"],
				Role:    payload["role"],
			},
		}), nil
	}

	if targetAction == "confirm_reopen_approve" {
		payload := mergeDecidePayload(cand, userCtx)
		if userCtx.InteractiveCard != nil {
			userCtx.dismissCard("resolved")
		}
		userCtx.applyPending(nil)
		reqID, _ := strconv.ParseInt(payload["request_id"], 10, 64)
		return e.applyNarrative(ctx, userCtx, "handleDocGovProposalDecide", "", "这是已确认或已取消后的受理通报。必须保留文档名与动作边界，不得把受理说成已经归档生效。", &CoordinationResult{
			Status: StatusAccepted, Intent: cand.Intent, Branch: cand.Branch,
			NaturalReply:   "正在批准重开申请…",
			UpdatedContext: userCtx, ClearExpectation: true,
			PendingAction: &PendingAction{
				Kind:      "docgov.reopen_approve",
				DocID:     docName,
				RequestID: reqID,
			},
		}), nil
	}

	if targetAction == "cancel" {
		if userCtx.InteractiveCard != nil {
			userCtx.dismissCard("cancelled")
		}
		userCtx.applyPending(nil)

		return e.applyNarrative(ctx, userCtx, "handleDocGovProposalDecide", "", "这是已确认或已取消后的受理通报。必须保留文档名与动作边界，不得把受理说成已经归档生效。", &CoordinationResult{
			Status:           StatusAccepted,
			Intent:           cand.Intent,
			Branch:           cand.Branch,
			NaturalReply:     fmt.Sprintf("已取消针对《%s》的操作，文档状态保持不变。", docName),
			UpdatedContext:   userCtx,
			ClearExpectation: true,
		}), nil
	}

	// 默认分支：禁止假成功——缺确认动作时诚实澄清
	clarify := "请明确您要执行的文档操作（例如确认驳回、确认终审批准、确认认领或确认送审）。未确认前不会修改文档状态。"
	return &CoordinationResult{
		Status:              StatusClarificationRequired,
		Intent:              cand.Intent,
		Branch:              cand.Branch,
		ClarificationPrompt: clarify,
		NaturalReply:        clarify,
		UpdatedContext:      userCtx,
	}, nil
}

func mergeDecidePayload(cand *intent.CandidateIntent, userCtx *UserProjectContext) map[string]string {
	out := map[string]string{}
	if userCtx != nil && userCtx.InteractiveCard != nil {
		for _, a := range userCtx.InteractiveCard.Actions {
			if a.IsAffirmativeDefault && a.Payload != nil {
				for k, v := range a.Payload {
					out[k] = v
				}
			}
		}
	}
	if userCtx != nil && userCtx.PendingExpectation != nil && userCtx.PendingExpectation.Payload != nil {
		for k, v := range userCtx.PendingExpectation.Payload {
			out[k] = v
		}
	}
	if cand != nil && cand.FilledSlots != nil {
		for k, v := range cand.FilledSlots {
			if v != "" {
				out[k] = v
			}
		}
	}
	return out
}