"""
    tools/file_mutation_queue.jl - File mutation queue

This module provides file mutation serialization for safe concurrent file writes.
"""

module FileMutationQueue

using ..Types: *
using ..HarnessTypes: ExecutionEnv, getOrThrow, FileError, Result

# ============================================================================
# Mutation queue state
# ============================================================================

mutable struct MutationQueueState
    queues::Dict{String, Any}
    registration::Any
end

# Global state
const states = Dict{ExecutionEnv, MutationQueueState}()

function getState(env::ExecutionEnv)::MutationQueueState
    if !haskey(states, env)
        states[env] = MutationQueueState(Dict{String, Any}(), nothing)
    end
    return states[env]
end

# ============================================================================
# File mutation queue helpers
# ============================================================================

async function getMutationQueueKey(env::ExecutionEnv, path::String)::String
    absolute_path = getOrThrow(getOrThrow(absolutePath(env, path), "Failed to get absolute path"))
    canonical_path = canonicalPath(env, absolute_path, nothing)
    if canonical_path.ok
        return canonical_path.value
    end
    if canonical_path.error.code in ("not_found", "not_supported")
        return absolute_path
    end
    throw(canonical_path.error)
end

# ============================================================================
# Main function - serialize file mutations
# ============================================================================

function withFileMutationQueue{T}(env::ExecutionEnv, path::String, fn::Function)::T
    state = getState(env)

    # TODO: Implement proper async queueing
    # This is a simplified version
    return fn()
end

end