package agenttask

import (
	"context"
	"fmt"
)

func (m *Manager) reviewSubmission(
	ctx context.Context,
	project ProjectRecord,
	work WorkRecord,
	submission Submission,
) (bool, error) {
	result, err := m.reviewer.Review(ctx, ReviewRequest{
		Project: project, Work: work, Submission: submission,
		IdempotencyKey: reviewKey(project.ProjectID, work.Unit.ID, work.Attempt, submission.ArtifactID),
	})
	if err != nil {
		m.blockWork(ctx, project.ProjectID, work.Unit.ID, WorkStateBlocked, Blocker{
			Code: BlockerReviewFailed, Message: err.Error(), Retryable: true,
		})
		return false, nil
	}
	if result.ProjectID != project.ProjectID || result.WorkUnitID != work.Unit.ID ||
		result.AttemptID != work.AttemptID || result.ArtifactID != submission.ArtifactID {
		m.blockWork(ctx, project.ProjectID, work.Unit.ID, WorkStateBlocked, Blocker{
			Code: BlockerArtifactMismatch, Message: "official review result identity mismatch",
		})
		return false, nil
	}
	var cmdID CommandID
	var wfRev WorkflowRevision
	if project.Intent != nil {
		cmdID = project.Intent.CommandID
		wfRev = project.Intent.WorkflowRevision
	}
	if result.Verdict == ReviewVerdictPass {
		if result.ChangeSet == nil || result.ChangeSet.ArtifactID != submission.ArtifactID {
			m.blockWork(ctx, project.ProjectID, work.Unit.ID, WorkStateBlocked, Blocker{
				Code: BlockerArtifactMismatch, Message: "PASS review is missing an exact artifact change-set identity",
			})
			return false, nil
		}
		if err := validateIdentity("change_set", string(result.ChangeSet.ID)); err != nil {
			m.blockWork(ctx, project.ProjectID, work.Unit.ID, WorkStateBlocked, Blocker{
				Code: BlockerArtifactMismatch, Message: err.Error(),
			})
			return false, nil
		}
		if err := validateIdentity("change_set_revision", result.ChangeSet.Revision); err != nil {
			m.blockWork(ctx, project.ProjectID, work.Unit.ID, WorkStateBlocked, Blocker{
				Code: BlockerArtifactMismatch, Message: err.Error(),
			})
			return false, nil
		}
	}
	committedReview := result
	if result.ChangeSet != nil {
		changeSet := *result.ChangeSet
		committedReview.ChangeSet = &changeSet
	}
	if err := m.changeWork(ctx, project.ProjectID, work.Unit.ID, func(work *WorkRecord) error {
		work.Review = &committedReview
		return nil
	}); err != nil {
		return false, err
	}
	m.emit(ctx, Event{
		Type: EventReviewResult, ProjectID: project.ProjectID, WorkspaceID: project.WorkspaceID,
		WorkUnitID: work.Unit.ID, CommandID: cmdID, WorkflowRevision: wfRev, AttemptID: work.AttemptID, Ordinal: work.DispatchOrdinal,
		Detail: string(result.Verdict),
	})
	switch result.Verdict {
	case ReviewVerdictPass:
		err := m.changeWork(ctx, project.ProjectID, work.Unit.ID, func(work *WorkRecord) error {
			if err := transitionWork(work, WorkStatePendingIntegration); err != nil {
				return err
			}
			changeSet := *result.ChangeSet
			work.ChangeSet = &changeSet
			if work.Locators == nil {
				work.Locators = make(map[LocatorKind]LocatorRecord)
			}
			work.Locators[LocatorChangeSet] = locatorForChangeSet(project, *work, changeSet)
			work.Blocker = nil
			resetFailure(work, FailureStageReview)
			return nil
		})
		return false, err
	case ReviewVerdictWarn, ReviewVerdictFail:
		var rework bool
		var exhausted bool
		var nextAttempt AttemptID
		err := m.changeWork(ctx, project.ProjectID, work.Unit.ID, func(work *WorkRecord) error {
			failure := m.recordFailure(work, FailureStageReview, Blocker{
				Code:      BlockerReviewFailed,
				Message:   fmt.Sprintf("official review ended with %s: %s", result.Verdict, result.Message),
				Retryable: result.Rework,
			})
			if failure.Code == BlockerFailureBudgetExhausted {
				if err := transitionWork(work, WorkStateBlocked); err != nil {
					return err
				}
				work.Blocker = &failure
				exhausted = true
				return nil
			}
			if result.Rework && work.Attempt < m.config.MaxReworkAttempts {
				if err := transitionWork(work, WorkStateReady); err != nil {
					return err
				}
				work.Attempt++
				work.AttemptID = attemptID(work.Unit.ID, work.Attempt)
				work.Target = nil
				work.Isolation = nil
				work.Submission = nil
				work.ChangeSet = nil
				work.Locators = make(map[LocatorKind]LocatorRecord)
				work.Blocker = nil
				rework = true
				nextAttempt = work.AttemptID
				return nil
			}
			code := BlockerReviewFailed
			if result.Rework {
				code = BlockerReviewReworkExhausted
			}
			if err := transitionWork(work, WorkStateBlocked); err != nil {
				return err
			}
			work.Blocker = &Blocker{
				Code:    code,
				Message: fmt.Sprintf("official review ended with %s: %s", result.Verdict, result.Message),
			}
			return nil
		})
		if err != nil {
			return false, err
		}
		if rework {
			m.emit(ctx, Event{
				Type: EventFollowup, ProjectID: project.ProjectID, WorkspaceID: project.WorkspaceID,
				WorkUnitID: work.Unit.ID, CommandID: cmdID, WorkflowRevision: wfRev, AttemptID: nextAttempt,
				Ordinal: work.DispatchOrdinal, Detail: string(result.Verdict),
			})
			return true, nil
		}
		if exhausted {
			m.emit(ctx, Event{
				Type: EventBlocked, ProjectID: project.ProjectID, WorkspaceID: project.WorkspaceID,
				WorkUnitID: work.Unit.ID, AttemptID: work.AttemptID,
				State: WorkStateBlocked, Detail: string(BlockerFailureBudgetExhausted),
			})
			return false, nil
		}
		m.emit(ctx, Event{
			Type: EventBlocked, ProjectID: project.ProjectID, WorkspaceID: project.WorkspaceID,
			WorkUnitID: work.Unit.ID, AttemptID: work.AttemptID,
			State: WorkStateBlocked, Detail: string(BlockerReviewReworkExhausted),
		})
		return false, nil
	case ReviewVerdictUserReview:
		m.blockWork(ctx, project.ProjectID, work.Unit.ID, WorkStateTerminalDeferred, Blocker{
			Code: BlockerUserReview, Message: result.Message,
		})
		return false, nil
	default:
		m.blockWork(ctx, project.ProjectID, work.Unit.ID, WorkStateBlocked, Blocker{
			Code: BlockerReviewFailed, Message: "official review returned an unknown verdict",
		})
		return false, nil
	}
}