#!/usr/bin/env bash

# --- work from the project root ----------------------------------------------
# Every path below is repo-relative, so a hook invoked with a working directory
# that is not the repo root would silently read and write the WRONG TREE --
# returning a near-empty result instead of the session-recovery block, and
# creating stray trees such as docs/production/session-logs/ on write.
#
# PRECEDENCE IS LOAD-BEARING. A cwd that IS a project root carries real
# information and must win: a caller sitting inside another project means that
# project, not this one. Resolving to the script's own location first would
# override them. So, in order:
#   1. cwd holds project.yaml   -> cwd   (a project root)
#   2. cwd holds .claude/       -> cwd   (a project root not yet configured)
#   3. CLAUDE_PROJECT_DIR       -> that  (populated in the hook environment)
#   4. this script's location   -> <root>/.claude/hooks/../.. by construction
# Rule 4 always works and needs no environment at all; rules 1-2 stop it from
# overriding a caller that legitimately means somewhere else.
#
# NOT an upward search: that resolves a nested project to its parent's config.
if [ -f "project.yaml" ] || [ -d ".claude" ]; then
  CCGS_ROOT="$PWD"
elif [ -n "${CLAUDE_PROJECT_DIR:-}" ] && [ -d "${CLAUDE_PROJECT_DIR}" ]; then
  CCGS_ROOT="$CLAUDE_PROJECT_DIR"
else
  CCGS_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." 2>/dev/null && pwd)"
fi
[ -n "$CCGS_ROOT" ] && cd "$CCGS_ROOT" 2>/dev/null || true

# Claude Code Game Studios — Status Line
# Receives JSON on stdin, outputs a single-line status.
#
# Segments: ctx% | model | production stage [| Epic > Feature > Task]

input=$(cat)

# --- Parse JSON (jq with grep fallback) ---
if command -v jq &>/dev/null; then
  model=$(echo "$input" | jq -r '.model.display_name // "Unknown"')
  used_pct=$(echo "$input" | jq -r '.context_window.used_percentage // empty')
  cwd=$(echo "$input" | jq -r '.workspace.current_dir // .cwd // ""')
else
  model=$(echo "$input" | grep -oE '"display_name"[[:space:]]*:[[:space:]]*"[^"]*"' | head -1 | sed 's/.*: *"//;s/"//')
  used_pct=$(echo "$input" | grep -oE '"used_percentage"[[:space:]]*:[[:space:]]*[0-9]+' | head -1 | sed 's/.*: *//')
  cwd=$(echo "$input" | grep -oE '"current_dir"[[:space:]]*:[[:space:]]*"[^"]*"' | head -1 | sed 's/.*: *"//;s/"//')
  [ -z "$model" ] && model="Unknown"
fi

# Normalize Windows paths
cwd=$(echo "$cwd" | sed 's|\\|/|g')
[ -z "$cwd" ] && cwd="."

# --- Context usage ---
if [ -n "$used_pct" ]; then
  ctx_label="ctx: ${used_pct}%"
else
  ctx_label="ctx: --"
fi

# --- Production stage ---
# Priority 1: project.stage from project.yaml
stage=""
project_yaml="$cwd/project.yaml"
yaml_helper="$cwd/.claude/hooks/yaml-helper.sh"
if [ -f "$project_yaml" ] && [ -f "$yaml_helper" ]; then
  source "$yaml_helper"
  stage=$(get_yaml_key "$project_yaml" project.stage 2>/dev/null)
fi
# Priority 2: legacy stage.txt fallback
if [ -z "$stage" ]; then
  stage_file="$cwd/production/stage.txt"
  if [ -f "$stage_file" ]; then
    stage=$(head -1 "$stage_file" | tr -d '\r\n')
  fi
fi

# Priority 3: Auto-detect from artifacts
if [ -z "$stage" ]; then
  concept_file="$cwd/design/gdd/game-concept.md"
  systems_file="$cwd/design/gdd/systems-index.md"
  tech_prefs="$cwd/.claude/docs/technical-preferences.md"

  has_concept=false
  has_systems=false
  engine_configured=false
  src_count=0

  [ -f "$concept_file" ] && has_concept=true
  [ -f "$systems_file" ] && has_systems=true

  # Check if engine is configured (project.yaml first, fall back to technical-preferences.md)
  if [ -f "$project_yaml" ] && [ -f "$yaml_helper" ]; then
    # yaml-helper may have been sourced above for stage; sourcing again is idempotent
    source "$yaml_helper"
    engine_name=$(get_yaml_key "$project_yaml" engine.name 2>/dev/null)
    [ -n "$engine_name" ] && engine_configured=true
  fi
  if [ "$engine_configured" = false ] && [ -f "$tech_prefs" ]; then
    # Leading whitespace tolerated, matching detect-gaps.sh and the migrator.
    # This is the THIRD copy of "is the engine configured in
    # technical-preferences.md" in the tree, and it was the last one still
    # anchored to column 0 -- an indented bullet read as unconfigured here while
    # the other two read it as configured, so the auto-detect ladder below
    # dropped the project to an earlier stage than the rest of the system saw.
    engine_line=$(grep -m1 -E '^[[:space:]]*-[[:space:]]+\*\*Engine\*\*:' "$tech_prefs" 2>/dev/null || true)
    if [ -n "$engine_line" ] && ! echo "$engine_line" | grep -q "TO BE CONFIGURED"; then
      engine_configured=true
    fi
  fi

  # Count source files (language-agnostic)
  if [ -d "$cwd/src" ]; then
    src_count=$(find "$cwd/src" -type f \( -name "*.gd" -o -name "*.cs" -o -name "*.cpp" -o -name "*.h" -o -name "*.py" -o -name "*.rs" -o -name "*.lua" -o -name "*.tscn" -o -name "*.tres" \) 2>/dev/null | wc -l | tr -d ' ')
  fi

  # Check for ADRs (signals Pre-Production phase)
  has_adrs=false
  if ls "$cwd/docs/architecture/"adr-*.md 2>/dev/null | head -1 | grep -q .; then
    has_adrs=true
  fi

  # Determine stage (check from most-advanced backward)
  if [ "$src_count" -ge 10 ] 2>/dev/null; then
    stage="Production"
  elif [ "$has_adrs" = true ]; then
    stage="Pre-Production"
  elif [ "$engine_configured" = true ]; then
    stage="Technical Setup"
  elif [ "$has_systems" = true ]; then
    stage="Systems Design"
  elif [ "$has_concept" = true ]; then
    stage="Concept"
  else
    stage="Concept"
  fi
fi

# --- Process posture (modes.rigor) ---
# Locked to project.yaml (not locally overridable) with a plain terminal default
# of 'standard', so a direct get_yaml_key read + default is exact. Deliberately
# NOT resolve_setting: that assumes PWD is the project root, unsafe here since the
# status line works from an absolute $cwd and never cd's.
#
# The 'standard' default applies ONLY when nothing contradicts it. If `rigor` is
# unset but a knob it fronts is set explicitly, the project's real process weight
# is whatever that knob says, and printing 'standard' actively misreports it —
# migration is the common case, writing `modes.review_mode` and no `modes.rigor`,
# so every v1.0 upgrader running full director reviews read 'Production · standard'.
# Suppress instead of guessing, matching the unconfigured-project behaviour: no
# config, no claim. Suppression is correct rather than lossy — the fronted knobs
# disagree with each other in this state, so there is no single honest posture.
rigor=""
if [ -f "$project_yaml" ] && [ -f "$yaml_helper" ]; then
  source "$yaml_helper"
  rigor=$(get_yaml_key "$project_yaml" modes.rigor 2>/dev/null)
  if [ -z "$rigor" ]; then
    rigor="standard"
    # Cheap pre-filter first. This hook runs every turn, and the common case
    # (nothing fronted set) must not cost a get_yaml_key subprocess per key.
    # The grep is a deliberate SUPERSET — it matches the leaf names anywhere at
    # depth, so a false positive only costs the precise checks below, while a
    # miss is impossible. Never let it decide on its own: a bare `size:` under
    # some unrelated block would suppress the posture with no reason.
    _fronted='^[[:space:]]+(review_mode|workflow|density|level|story_granularity|size):[[:space:]]*[^[:space:]#]'
    for _f in "$project_yaml" "$cwd/project.local.yaml"; do
      [ -f "$_f" ] || continue
      grep -qE "$_fronted" "$_f" 2>/dev/null || continue
      for _k in modes.review_mode modes.workflow docs.density qa.level \
                modes.story_granularity team.size; do
        if [ -n "$(get_yaml_key "$_f" "$_k" 2>/dev/null)" ]; then rigor=""; break; fi
      done
      [ -z "$rigor" ] && break
    done
  fi
fi

# --- Epic/Feature/Task breadcrumb (Production+ only) ---
breadcrumb=""
if [ "$stage" = "Production" ] || [ "$stage" = "Polish" ] || [ "$stage" = "Release" ]; then
  state_file="$cwd/production/session-state/active.md"
  if [ -f "$state_file" ]; then
    # Parse structured STATUS block
    in_block=false
    epic="" feature="" task=""
    while IFS= read -r line; do
      case "$line" in
        *"<!-- STATUS -->"*) in_block=true; continue ;;
        *"<!-- /STATUS -->"*) break ;;
      esac
      if [ "$in_block" = true ]; then
        case "$line" in
          Epic:*) epic=$(echo "$line" | sed 's/^Epic: *//') ;;
          Feature:*) feature=$(echo "$line" | sed 's/^Feature: *//') ;;
          Task:*) task=$(echo "$line" | sed 's/^Task: *//') ;;
        esac
      fi
    done < "$state_file"

    # Build breadcrumb from whatever is set
    parts=""
    [ -n "$epic" ] && parts="$epic"
    [ -n "$feature" ] && parts="${parts:+$parts > }$feature"
    [ -n "$task" ] && parts="${parts:+$parts > }$task"
    [ -n "$parts" ] && breadcrumb=" | $parts"
  fi
fi

# --- Assemble ---
printf "%s" "${ctx_label} | ${model} | ${stage}${rigor:+ · $rigor}${breadcrumb}"