// Package beads provides a wrapper for the bd (beads) CLI.
package beads

// BuiltinMolecule defines a built-in molecule template.
type BuiltinMolecule struct {
	ID          string // Well-known ID (e.g., "mol-engineer-in-box")
	Title       string
	Description string
}

// BuiltinMolecules returns all built-in molecule definitions.
func BuiltinMolecules() []BuiltinMolecule {
	return []BuiltinMolecule{
		EngineerInBoxMolecule(),
		QuickFixMolecule(),
		ResearchMolecule(),
		InstallGoBinaryMolecule(),
		BootstrapGasTownMolecule(),
		PolecatWorkMolecule(),
		VersionBumpMolecule(),
		DeaconPatrolMolecule(),
	}
}

// EngineerInBoxMolecule returns the engineer-in-box molecule definition.
// This is a full workflow from design to merge.
func EngineerInBoxMolecule() BuiltinMolecule {
	return BuiltinMolecule{
		ID:    "mol-engineer-in-box",
		Title: "Engineer in a Box",
		Description: `Full workflow from design to merge.

## Step: design
Think carefully about architecture. Consider:
- Existing patterns in the codebase
- Trade-offs between approaches
- Testability and maintainability

Write a brief design summary before proceeding.

## Step: implement
Write the code. Follow codebase conventions.
Needs: design

## Step: review
Self-review the changes. Look for:
- Bugs and edge cases
- Style issues
- Missing error handling
Needs: implement

## Step: test
Write and run tests. Cover happy path and edge cases.
Fix any failures before proceeding.
Needs: implement

## Step: submit
Submit for merge via refinery.
Needs: review, test`,
	}
}

// QuickFixMolecule returns the quick-fix molecule definition.
// This is a fast path for small changes.
func QuickFixMolecule() BuiltinMolecule {
	return BuiltinMolecule{
		ID:    "mol-quick-fix",
		Title: "Quick Fix",
		Description: `Fast path for small changes.

## Step: implement
Make the fix. Keep it focused.

## Step: test
Run relevant tests. Fix any regressions.
Needs: implement

## Step: submit
Submit for merge.
Needs: test`,
	}
}

// ResearchMolecule returns the research molecule definition.
// This is an investigation workflow.
func ResearchMolecule() BuiltinMolecule {
	return BuiltinMolecule{
		ID:    "mol-research",
		Title: "Research",
		Description: `Investigation workflow.

## Step: investigate
Explore the question. Search code, read docs,
understand context. Take notes.

## Step: document
Write up findings. Include:
- What you learned
- Recommendations
- Open questions
Needs: investigate`,
	}
}

// InstallGoBinaryMolecule returns the install-go-binary molecule definition.
// This is a single step to rebuild and install the gt binary after code changes.
func InstallGoBinaryMolecule() BuiltinMolecule {
	return BuiltinMolecule{
		ID:    "mol-install-go-binary",
		Title: "Install Go Binary",
		Description: `Single step to rebuild and install the gt binary after code changes.

## Step: install
Build and install the gt binary locally.

Run from the rig directory:
` + "```" + `
go build -o gt ./cmd/gt
go install ./cmd/gt
` + "```" + `

Verify the installed binary is updated:
` + "```" + `
which gt
gt --version  # if version command exists
` + "```",
	}
}

// BootstrapGasTownMolecule returns the bootstrap molecule for new Gas Town installations.
// This walks a user through setting up Gas Town from scratch after brew install.
func BootstrapGasTownMolecule() BuiltinMolecule {
	return BuiltinMolecule{
		ID:    "mol-bootstrap",
		Title: "Bootstrap Gas Town",
		Description: `Complete setup of a new Gas Town installation.

Run this after installing gt and bd via Homebrew. This molecule guides you through
creating an HQ, setting up rigs, and configuring your environment.

## Step: locate-hq
Determine where to install the Gas Town HQ.

Ask the user for their preferred location. Common choices:
- ~/gt (recommended - short, easy to type)
- ~/gastown
- ~/workspace/gt

Validate the path:
- Must not already exist (or be empty)
- Parent directory must be writable
- Avoid paths with spaces

Store the chosen path for subsequent steps.

## Step: create-hq
Create the HQ directory structure.

` + "```" + `bash
mkdir -p {{hq_path}}
cd {{hq_path}}
gt install . --name {{hq_name}}
` + "```" + `

If the user wants to track the HQ in git:
` + "```" + `bash
gt git-init --github={{github_repo}} --private
` + "```" + `

The HQ now has:
- mayor/ directory
- .beads/ for town-level tracking
- CLAUDE.md for mayor context

Needs: locate-hq

## Step: setup-rigs
Configure which rigs to add to the HQ.

Default rigs for Gas Town development:
- gastown (git@github.com:steveyegge/gastown.git)
- beads (git@github.com:steveyegge/beads.git)

For each rig, run:
` + "```" + `bash
gt rig add <name> <git-url> --prefix <prefix>
` + "```" + `

This creates the full rig structure:
- refinery/rig/ (canonical main clone)
- mayor/rig/ (mayor's working clone)
- crew/main/ (default human workspace)
- witness/ (polecat monitor)
- polecats/ (worker directory)

Needs: create-hq

## Step: build-gt
Build the gt binary from source.

` + "```" + `bash
cd {{hq_path}}/gastown/mayor/rig
go build -o gt ./cmd/gt
` + "```" + `

Verify the build succeeded:
` + "```" + `bash
./gt version
` + "```" + `

Needs: setup-rigs
Tier: haiku

## Step: install-paths
Install gt to a location in PATH.

Check if ~/bin or ~/.local/bin is in PATH:
` + "```" + `bash
echo $PATH | tr ':' '\n' | grep -E '(~/bin|~/.local/bin|/home/.*/bin)'
` + "```" + `

Copy the binary:
` + "```" + `bash
mkdir -p ~/bin
cp {{hq_path}}/gastown/mayor/rig/gt ~/bin/gt
` + "```" + `

If ~/bin is not in PATH, add to shell config:
` + "```" + `bash
echo 'export PATH="$HOME/bin:$PATH"' >> ~/.zshrc
# or ~/.bashrc for bash users
` + "```" + `

Verify:
` + "```" + `bash
which gt
gt version
` + "```" + `

Needs: build-gt
Tier: haiku

## Step: init-beads
Initialize beads databases in all clones.

For each rig's mayor clone:
` + "```" + `bash
cd {{hq_path}}/<rig>/mayor/rig
bd init --prefix <rig-prefix>
` + "```" + `

For the town-level beads:
` + "```" + `bash
cd {{hq_path}}
bd init --prefix hq
` + "```" + `

Configure sync-branch for multi-clone setups:
` + "```" + `bash
echo "sync-branch: beads-sync" >> .beads/config.yaml
` + "```" + `

Needs: setup-rigs
Tier: haiku

## Step: sync-beads
Sync beads from remotes and fix any issues.

For each initialized beads database:
` + "```" + `bash
bd sync
bd doctor --fix
` + "```" + `

This imports existing issues from JSONL and sets up git hooks.

Needs: init-beads
Tier: haiku

## Step: verify
Verify the installation is complete and working.

Run health checks:
` + "```" + `bash
gt status          # Should show rigs with crew/refinery/mayor
gt doctor          # Check for issues
bd list            # Should show issues from synced beads
` + "```" + `

Test spawning capability (dry run):
` + "```" + `bash
gt spawn --help
` + "```" + `

Print summary:
- HQ location
- Installed rigs
- gt version
- bd version

Needs: sync-beads, install-paths`,
	}
}

// PolecatWorkMolecule returns the polecat-work molecule definition.
// This is the full polecat lifecycle from assignment to decommission.
// It's an operational molecule that enables crash recovery and context survival.
func PolecatWorkMolecule() BuiltinMolecule {
	return BuiltinMolecule{
		ID:    "mol-polecat-work",
		Title: "Polecat Work",
		Description: `Full polecat lifecycle from assignment to decommission.

This molecule enables nondeterministic idempotence for polecat work.
A polecat that crashes after any step can restart, read its molecule state,
and continue from the last completed step. No work is lost.

## Step: load-context
Run gt prime and bd prime. Verify issue assignment.
Check inbox for any relevant messages.

Read the assigned issue and understand the requirements.
Identify any blockers or missing information.

## Step: implement
Implement the solution. Follow codebase conventions.
File discovered work as new issues with bd create.

Make regular commits with clear messages.
Keep changes focused on the assigned issue.
Needs: load-context

## Step: self-review
Review your own changes. Look for:
- Bugs and edge cases
- Style issues
- Missing error handling
- Security concerns

Fix any issues found before proceeding.
Needs: implement

## Step: verify-tests
Run existing tests. Add new tests for new functionality.
Ensure adequate coverage.

` + "```" + `bash
go test ./...
` + "```" + `

Fix any test failures before proceeding.
Needs: implement

## Step: rebase-main
Rebase against main to incorporate any changes.
Resolve conflicts if needed.

` + "```" + `bash
git fetch origin main
git rebase origin/main
` + "```" + `

If there are conflicts, resolve them carefully and
continue the rebase.
Needs: self-review, verify-tests

## Step: submit-merge
Submit to merge queue. Create PR if needed.
Verify CI passes.

` + "```" + `bash
gt done  # Signal work ready for merge queue
` + "```" + `

If there are CI failures, fix them before proceeding.
Needs: rebase-main

## Step: update-handoff
Update handoff bead with final state.
File any remaining work as issues.

Document any important context for the next session
or for anyone reviewing the work.
Needs: submit-merge

## Step: request-shutdown
Send shutdown request to Witness.
Wait for termination.

The polecat is now ready to be cleaned up.
Do not exit directly - wait for Witness to kill the session.
Needs: update-handoff`,
	}
}

// VersionBumpMolecule returns the version-bump molecule definition.
// This is the release checklist for Gas Town versions.
func VersionBumpMolecule() BuiltinMolecule {
	return BuiltinMolecule{
		ID:    "mol-version-bump",
		Title: "Version Bump",
		Description: `Release checklist for Gas Town version {{version}}.

This molecule ensures all release steps are completed properly.
Replace {{version}} with the target version (e.g., 0.1.0).

## Step: update-version
Update version string in internal/cmd/version.go.

Change the Version variable to the new version:
` + "```" + `go
var (
    Version   = "{{version}}"
    BuildTime = "unknown"
    GitCommit = "unknown"
)
` + "```" + `

## Step: rebuild-binary
Rebuild the gt binary with version info.

` + "```" + `bash
go build -ldflags="-X github.com/steveyegge/gastown/internal/cmd.Version={{version}} \
  -X github.com/steveyegge/gastown/internal/cmd.GitCommit=$(git rev-parse --short HEAD) \
  -X github.com/steveyegge/gastown/internal/cmd.BuildTime=$(date -u +%Y-%m-%dT%H:%M:%SZ)" \
  -o gt ./cmd/gt
` + "```" + `

Verify the version:
` + "```" + `bash
./gt version
` + "```" + `

Needs: update-version

## Step: run-tests
Run the full test suite.

` + "```" + `bash
go test ./...
` + "```" + `

Fix any failures before proceeding.
Needs: rebuild-binary

## Step: update-changelog
Update CHANGELOG.md with release notes.

Add a new section at the top:
` + "```" + `markdown
## [{{version}}] - YYYY-MM-DD

### Added
- Feature descriptions

### Changed
- Change descriptions

### Fixed
- Bug fix descriptions
` + "```" + `

Needs: run-tests

## Step: commit-release
Commit the release changes.

` + "```" + `bash
git add -A
git commit -m "release: v{{version}}"
` + "```" + `

Needs: update-changelog

## Step: tag-release
Create and push the release tag.

` + "```" + `bash
git tag -a v{{version}} -m "Release v{{version}}"
git push origin main
git push origin v{{version}}
` + "```" + `

Needs: commit-release

## Step: verify-release
Verify the release is complete.

- Check that the tag exists on GitHub
- Verify CI/CD (if configured) completed successfully
- Test installation from the new tag:
` + "```" + `bash
go install github.com/steveyegge/gastown/cmd/gt@v{{version}}
gt version
` + "```" + `

Needs: tag-release

## Step: update-installations
Update local installations and restart daemons.

` + "```" + `bash
# Rebuild and install
go install ./cmd/gt

# Restart any running daemons
pkill -f "gt daemon" || true
gt daemon start
` + "```" + `

Needs: verify-release`,
	}
}

// DeaconPatrolMolecule returns the deacon-patrol molecule definition.
// This is the Mayor's daemon loop for handling callbacks, health checks, and cleanup.
func DeaconPatrolMolecule() BuiltinMolecule {
	return BuiltinMolecule{
		ID:    "mol-deacon-patrol",
		Title: "Deacon Patrol",
		Description: `Mayor's daemon patrol loop.

The Deacon is the Mayor's background process that runs continuously,
handling callbacks, monitoring rig health, and performing cleanup.
Each patrol cycle runs these steps in sequence, then loops or exits.

## Step: inbox-check
Handle callbacks from agents.

Check the Mayor's inbox for messages from:
- Witnesses reporting polecat status
- Refineries reporting merge results
- Polecats requesting help or escalation
- External triggers (webhooks, timers)

Process each message:
` + "```" + `bash
gt mail inbox
# For each message:
gt mail read <id>
# Handle based on message type
` + "```" + `

Callbacks may spawn new polecats, update issue state, or trigger other actions.

## Step: health-scan
Ping Witnesses and Refineries.

For each rig, verify:
- Witness is responsive
- Refinery is processing queue
- No stalled operations

` + "```" + `bash
gt status --health
# Check each rig
for rig in $(gt rigs); do
    gt rig status $rig
done
` + "```" + `

Report any issues found. Restart unresponsive components if needed.
Needs: inbox-check

## Step: plugin-run
Execute registered plugins.

Run any plugins registered with the Deacon:
- Custom health checks
- Integration hooks (Slack, GitHub, etc.)
- Metrics collection
- External system sync

Plugins are defined in the Mayor's config and run on each patrol cycle.
Skip this step if no plugins are registered.
Needs: health-scan

## Step: orphan-check
Find abandoned work.

Scan for orphaned state:
- Issues marked in_progress with no active polecat
- Polecats that stopped responding mid-work
- Merge queue entries with no polecat owner
- Wisp sessions that outlived their spawner

` + "```" + `bash
bd list --status=in_progress
gt polecats --all --orphan
` + "```" + `

For each orphan:
- Check if polecat session still exists
- If not, mark issue for reassignment or retry
- File incident beads if data loss occurred
Needs: health-scan

## Step: session-gc
Clean dead sessions.

Garbage collect terminated sessions:
- Remove stale polecat directories
- Clean up wisp session artifacts
- Prune old logs and temp files
- Archive completed molecule state

` + "```" + `bash
gt gc --sessions
gt gc --wisps --age=1h
` + "```" + `

Preserve audit trail. Only clean sessions confirmed dead.
Needs: orphan-check

## Step: context-check
Check own context limit.

The Deacon runs in a Claude session with finite context.
Check if approaching the limit:

` + "```" + `bash
gt context --usage
` + "```" + `

If context is high (>80%), prepare for handoff:
- Summarize current state
- Note any pending work
- Write handoff to molecule state

This enables the Deacon to burn and respawn cleanly.
Needs: session-gc

## Step: loop-or-exit
Burn and let daemon respawn, or exit if context high.

Decision point at end of patrol cycle:

If context is LOW:
- Sleep briefly (avoid tight loop)
- Return to inbox-check step

If context is HIGH:
- Write state to persistent storage
- Exit cleanly
- Let the daemon orchestrator respawn a fresh Deacon

The daemon ensures Deacon is always running:
` + "```" + `bash
# Daemon respawns on exit
gt daemon status
` + "```" + `

This enables infinite patrol duration via context-aware respawning.
Needs: context-check`,
	}
}

// SeedBuiltinMolecules creates all built-in molecules in the beads database.
// It skips molecules that already exist (by title match).
// Returns the number of molecules created.
func (b *Beads) SeedBuiltinMolecules() (int, error) {
	molecules := BuiltinMolecules()
	created := 0

	// Get existing molecules to avoid duplicates
	existing, err := b.List(ListOptions{Type: "molecule", Priority: -1})
	if err != nil {
		return 0, err
	}

	// Build map of existing molecule titles
	existingTitles := make(map[string]bool)
	for _, issue := range existing {
		existingTitles[issue.Title] = true
	}

	// Create each molecule if it doesn't exist
	for _, mol := range molecules {
		if existingTitles[mol.Title] {
			continue // Already exists
		}

		_, err := b.Create(CreateOptions{
			Title:       mol.Title,
			Type:        "molecule",
			Priority:    2, // Medium priority
			Description: mol.Description,
		})
		if err != nil {
			return created, err
		}
		created++
	}

	return created, nil
}