#!/usr/bin/env bash
set -euo pipefail
#
# mission-init.sh — Initialize a new orchestration mission
#
# Usage:
#   mission-init.sh --name <name> [options]
#
# Options:
#   --name <name>              Mission name (required)
#   --project <path>           Project directory (default: CWD)
#   --prefix <prefix>          Task ID prefix (e.g., MS)
#   --milestones <comma-list>  Milestone names, comma-separated
#   --quality-gates <command>  Quality gate command string
#   --version <semver>         Milestone version (default: 0.0.1)
#   --description <text>       Mission description
#   --force                    Overwrite existing active mission

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "$SCRIPT_DIR/_lib.sh"

# ─── Parse arguments ─────────────────────────────────────────────────────────

NAME=""
PROJECT="."
PREFIX=""
MILESTONES=""
QUALITY_GATES=""
VERSION="0.0.1"
DESCRIPTION=""
FORCE=false

while [[ $# -gt 0 ]]; do
  case "$1" in
    --name)         NAME="$2"; shift 2 ;;
    --project)      PROJECT="$2"; shift 2 ;;
    --prefix)       PREFIX="$2"; shift 2 ;;
    --milestones)   MILESTONES="$2"; shift 2 ;;
    --quality-gates) QUALITY_GATES="$2"; shift 2 ;;
    --version)      VERSION="$2"; shift 2 ;;
    --description)  DESCRIPTION="$2"; shift 2 ;;
    --force)        FORCE=true; shift ;;
    -h|--help)
      cat <<'USAGE'
mission-init.sh — Initialize a new orchestration mission

Usage: mission-init.sh --name <name> [options]

Options:
  --name <name>              Mission name (required)
  --project <path>           Project directory (default: CWD)
  --prefix <prefix>          Task ID prefix (e.g., MS)
  --milestones <comma-list>  Milestone names, comma-separated
  --quality-gates <command>  Quality gate command string
  --version <semver>         Milestone version (default: 0.0.1)
  --description <text>       Mission description
  --force                    Overwrite existing active mission

Example:
  mosaic coord init \
    --name "Security Remediation" \
    --prefix SEC \
    --milestones "Critical Fixes,High Priority,Code Quality" \
    --quality-gates "pnpm lint && pnpm typecheck && pnpm test"
USAGE
      exit 0
      ;;
    *) echo "Unknown option: $1" >&2; exit 1 ;;
  esac
done

if [[ -z "$NAME" ]]; then
  echo -e "${C_RED}Error: --name is required${C_RESET}" >&2
  exit 1
fi

_require_jq

# ─── Validate project ───────────────────────────────────────────────────────

od="$(orch_dir "$PROJECT")"
if [[ ! -d "$od" ]]; then
  echo -e "${C_RED}Error: $od not found. Run 'mosaic bootstrap' first.${C_RESET}" >&2
  exit 1
fi

# Check for existing active mission
mp="$(mission_path "$PROJECT")"
if [[ -f "$mp" ]]; then
  existing_status="$(jq -r '.status // "inactive"' "$mp")"
  if [[ "$existing_status" == "active" || "$existing_status" == "paused" ]] && [[ "$FORCE" != true ]]; then
    existing_name="$(jq -r '.name // "unnamed"' "$mp")"
    echo -e "${C_YELLOW}Active mission exists: $existing_name (status: $existing_status)${C_RESET}" >&2
    echo "Use --force to overwrite." >&2
    exit 1
  fi
fi

# ─── Generate mission ID ────────────────────────────────────────────────────

MISSION_ID="$(slugify "$NAME")-$(date +%Y%m%d)"

# ─── Build milestones array ─────────────────────────────────────────────────

milestones_json="[]"
if [[ -n "$MILESTONES" ]]; then
  IFS=',' read -ra ms_array <<< "$MILESTONES"
  for i in "${!ms_array[@]}"; do
    ms_name="$(echo "${ms_array[$i]}" | sed 's/^[[:space:]]*//;s/[[:space:]]*$//')"
    ms_id="phase-$(( i + 1 ))"
    ms_branch="$(slugify "$ms_name")"
    milestones_json="$(echo "$milestones_json" | jq \
      --arg id "$ms_id" \
      --arg name "$ms_name" \
      --arg branch "$ms_branch" \
      '. + [{
        "id": $id,
        "name": $name,
        "status": "pending",
        "branch": $branch,
        "issue_ref": "",
        "started_at": "",
        "completed_at": ""
      }]')"
  done
fi

MILESTONE_COUNT="$(echo "$milestones_json" | jq 'length')"

# ─── Write mission.json ─────────────────────────────────────────────────────

mission_json="$(jq -n \
  --arg mid "$MISSION_ID" \
  --arg name "$NAME" \
  --arg desc "$DESCRIPTION" \
  --arg pp "$(cd "$PROJECT" && pwd)" \
  --arg ts "$(iso_now)" \
  --arg prefix "$PREFIX" \
  --arg qg "$QUALITY_GATES" \
  --arg ver "$VERSION" \
  --argjson milestones "$milestones_json" \
  '{
    schema_version: 1,
    mission_id: $mid,
    name: $name,
    description: $desc,
    project_path: $pp,
    created_at: $ts,
    status: "active",
    task_prefix: $prefix,
    quality_gates: $qg,
    milestone_version: $ver,
    milestones: $milestones,
    sessions: []
  }')"

write_json "$mp" "$mission_json"

# ─── Scaffold MISSION-MANIFEST.md ───────────────────────────────────────────

manifest_path="$PROJECT/$MANIFEST_FILE"
mkdir -p "$(dirname "$manifest_path")"

if [[ ! -f "$manifest_path" ]] || [[ "$FORCE" == true ]]; then
  # Build milestones table rows
  ms_table=""
  for i in $(seq 0 $(( MILESTONE_COUNT - 1 ))); do
    ms_id="$(echo "$milestones_json" | jq -r ".[$i].id")"
    ms_name="$(echo "$milestones_json" | jq -r ".[$i].name")"
    ms_table+="| $(( i + 1 )) | $ms_id | $ms_name | pending | — | — | — | — |"$'\n'
  done

  cat > "$manifest_path" <<EOF
# Mission Manifest — $NAME

> Persistent document tracking full mission scope, status, and session history.
> Updated by the orchestrator at each phase transition and milestone completion.

## Mission

**ID:** $MISSION_ID
**Statement:** $DESCRIPTION
**Phase:** Intake
**Current Milestone:** —
**Progress:** 0 / $MILESTONE_COUNT milestones
**Status:** active
**Last Updated:** $(date -u +"%Y-%m-%d %H:%M UTC")

## Success Criteria

<!-- Define measurable success criteria here -->

## Milestones

| # | ID | Name | Status | Branch | Issue | Started | Completed |
|---|-----|------|--------|--------|-------|---------|-----------|
$ms_table
## Deployment

| Target | URL | Method |
|--------|-----|--------|
| — | — | — |

## Token Budget

| Metric | Value |
|--------|-------|
| Budget | — |
| Used | 0 |
| Mode | normal |

## Session History

| Session | Runtime | Started | Duration | Ended Reason | Last Task |
|---------|---------|---------|----------|--------------|-----------|

## Scratchpad

Path: \`docs/scratchpads/$MISSION_ID.md\`
EOF
fi

# ─── Scaffold scratchpad ────────────────────────────────────────────────────

sp_dir="$PROJECT/$SCRATCHPAD_DIR"
sp_file="$sp_dir/$MISSION_ID.md"
mkdir -p "$sp_dir"

if [[ ! -f "$sp_file" ]]; then
  cat > "$sp_file" <<EOF
# Mission Scratchpad — $NAME

> Append-only log. NEVER delete entries. NEVER overwrite sections.
> This is the orchestrator's working memory across sessions.

## Original Mission Prompt

\`\`\`
(Paste the mission prompt here on first session)
\`\`\`

## Planning Decisions

## Session Log

| Session | Date | Milestone | Tasks Done | Outcome |
|---------|------|-----------|------------|---------|

## Open Questions

## Corrections
EOF
fi

# ─── Scaffold TASKS.md if absent ────────────────────────────────────────────

tasks_path="$PROJECT/$TASKS_MD"
mkdir -p "$(dirname "$tasks_path")"

if [[ ! -f "$tasks_path" ]]; then
  cat > "$tasks_path" <<EOF
# Tasks — $NAME

> Single-writer: orchestrator only. Workers read but never modify.

| id | status | milestone | description | pr | notes |
|----|--------|-----------|-------------|----|-------|
EOF
fi

# ─── Report ──────────────────────────────────────────────────────────────────

runtime_cmd="$(coord_launch_command)"
run_cmd="$(coord_run_command)"

echo ""
echo -e "${C_GREEN}${C_BOLD}Mission initialized: $NAME${C_RESET}"
echo ""
echo -e "  ${C_CYAN}Mission ID:${C_RESET}  $MISSION_ID"
echo -e "  ${C_CYAN}Milestones:${C_RESET}  $MILESTONE_COUNT"
echo -e "  ${C_CYAN}State:${C_RESET}       $(mission_path "$PROJECT")"
echo -e "  ${C_CYAN}Manifest:${C_RESET}    $manifest_path"
echo -e "  ${C_CYAN}Scratchpad:${C_RESET}  $sp_file"
echo -e "  ${C_CYAN}Tasks:${C_RESET}       $tasks_path"
echo ""
echo "Next: Resume with '$run_cmd' (or launch directly with '$runtime_cmd')."