#include "cli_trade_rules_catalog.hpp"
#include "cli_arg_parse.hpp"
#include "cli_box_emitter.hpp"

#include "pipeline/wowee_trade_rules.hpp"
#include <nlohmann/json.hpp>

#include <cstdint>
#include <cstdio>
#include <cstring>
#include <fstream>
#include <set>
#include <string>
#include <vector>

namespace wowee {
namespace editor {
namespace cli {

namespace {

std::string stripWtrdExt(std::string base) {
    stripExt(base, ".wtrd");
    return base;
}

const char* ruleKindName(uint8_t k) {
    using T = wowee::pipeline::WoweeTradeRules;
    switch (k) {
        case T::Allowed:             return "allowed";
        case T::Forbidden:           return "forbidden";
        case T::SoulboundException:  return "soulboundexception";
        case T::CrossFactionAllowed: return "crossfactionallowed";
        case T::LevelGated:          return "levelgated";
        case T::GoldEscrowMax:       return "goldescrowmax";
        case T::AuditLogged:         return "auditlogged";
        default:                     return "unknown";
    }
}

const char* targetingFilterName(uint8_t t) {
    using T = wowee::pipeline::WoweeTradeRules;
    switch (t) {
        case T::AnyPlayer:       return "anyplayer";
        case T::SameRealmOnly:   return "samerealmonly";
        case T::SameFactionOnly: return "samefactiononly";
        case T::SameAccountOnly: return "sameaccountonly";
        case T::GMOnly:          return "gmonly";
        default:                 return "unknown";
    }
}

bool saveOrError(const wowee::pipeline::WoweeTradeRules& c,
                 const std::string& base, const char* cmd) {
    if (!wowee::pipeline::WoweeTradeRulesLoader::save(c, base)) {
        std::fprintf(stderr, "%s: failed to save %s.wtrd\n",
                     cmd, base.c_str());
        return false;
    }
    return true;
}

void printGenSummary(const wowee::pipeline::WoweeTradeRules& c,
                     const std::string& base) {
    std::printf("Wrote %s.wtrd\n", base.c_str());
    std::printf("  catalog : %s\n", c.name.c_str());
    std::printf("  rules   : %zu\n", c.entries.size());
}

int handleGenStandard(int& i, int argc, char** argv) {
    std::string base = argv[++i];
    std::string name = "StandardTradeRules";
    if (parseOptArg(i, argc, argv)) name = argv[++i];
    base = stripWtrdExt(base);
    auto c = wowee::pipeline::WoweeTradeRulesLoader::makeStandard(name);
    if (!saveOrError(c, base, "gen-trd")) return 1;
    printGenSummary(c, base);
    return 0;
}

int handleGenServerAdmin(int& i, int argc, char** argv) {
    std::string base = argv[++i];
    std::string name = "ServerAdminTradeRules";
    if (parseOptArg(i, argc, argv)) name = argv[++i];
    base = stripWtrdExt(base);
    auto c = wowee::pipeline::WoweeTradeRulesLoader::makeServerAdmin(name);
    if (!saveOrError(c, base, "gen-trd-admin")) return 1;
    printGenSummary(c, base);
    return 0;
}

int handleGenRMT(int& i, int argc, char** argv) {
    std::string base = argv[++i];
    std::string name = "AntiRMTTradeRules";
    if (parseOptArg(i, argc, argv)) name = argv[++i];
    base = stripWtrdExt(base);
    auto c = wowee::pipeline::WoweeTradeRulesLoader::makeRMTPrevent(name);
    if (!saveOrError(c, base, "gen-trd-rmt")) return 1;
    printGenSummary(c, base);
    return 0;
}

int handleInfo(int& i, int argc, char** argv) {
    std::string base = argv[++i];
    bool jsonOut = consumeJsonFlag(i, argc, argv);
    base = stripWtrdExt(base);
    if (!wowee::pipeline::WoweeTradeRulesLoader::exists(base)) {
        std::fprintf(stderr, "WTRD not found: %s.wtrd\n", base.c_str());
        return 1;
    }
    auto c = wowee::pipeline::WoweeTradeRulesLoader::load(base);
    if (jsonOut) {
        nlohmann::json j;
        j["wtrd"] = base + ".wtrd";
        j["name"] = c.name;
        j["count"] = c.entries.size();
        nlohmann::json arr = nlohmann::json::array();
        for (const auto& e : c.entries) {
            arr.push_back({
                {"ruleId", e.ruleId},
                {"name", e.name},
                {"description", e.description},
                {"ruleKind", e.ruleKind},
                {"ruleKindName", ruleKindName(e.ruleKind)},
                {"targetingFilter", e.targetingFilter},
                {"targetingFilterName",
                    targetingFilterName(e.targetingFilter)},
                {"levelRequirement", e.levelRequirement},
                {"priority", e.priority},
                {"itemCategoryFilter", e.itemCategoryFilter},
                {"goldEscrowMaxCopper", e.goldEscrowMaxCopper},
                {"iconColorRGBA", e.iconColorRGBA},
            });
        }
        j["entries"] = arr;
        std::printf("%s\n", j.dump(2).c_str());
        return 0;
    }
    std::printf("WTRD: %s.wtrd\n", base.c_str());
    std::printf("  catalog : %s\n", c.name.c_str());
    std::printf("  rules   : %zu\n", c.entries.size());
    if (c.entries.empty()) return 0;
    std::printf("    id   kind                  targeting          lvlReq  prio  catFilter   goldMax(c)    name\n");
    for (const auto& e : c.entries) {
        std::printf("  %4u   %-19s   %-15s     %3u   %3u   0x%08X   %12llu   %s\n",
                    e.ruleId,
                    ruleKindName(e.ruleKind),
                    targetingFilterName(e.targetingFilter),
                    e.levelRequirement, e.priority,
                    e.itemCategoryFilter,
                    (unsigned long long)e.goldEscrowMaxCopper,
                    e.name.c_str());
    }
    return 0;
}

int handleValidate(int& i, int argc, char** argv) {
    std::string base = argv[++i];
    bool jsonOut = consumeJsonFlag(i, argc, argv);
    base = stripWtrdExt(base);
    if (!wowee::pipeline::WoweeTradeRulesLoader::exists(base)) {
        std::fprintf(stderr,
            "validate-wtrd: WTRD not found: %s.wtrd\n",
            base.c_str());
        return 1;
    }
    auto c = wowee::pipeline::WoweeTradeRulesLoader::load(base);
    std::vector<std::string> errors;
    std::vector<std::string> warnings;
    if (c.entries.empty()) {
        warnings.push_back("catalog has zero entries");
    }
    std::set<uint32_t> idsSeen;
    for (size_t k = 0; k < c.entries.size(); ++k) {
        const auto& e = c.entries[k];
        std::string ctx = "entry " + std::to_string(k) +
                          " (id=" + std::to_string(e.ruleId);
        if (!e.name.empty()) ctx += " " + e.name;
        ctx += ")";
        if (e.ruleId == 0)
            errors.push_back(ctx + ": ruleId is 0");
        if (e.name.empty())
            errors.push_back(ctx + ": name is empty");
        if (e.ruleKind > 6) {
            errors.push_back(ctx + ": ruleKind " +
                std::to_string(e.ruleKind) +
                " out of range (must be 0..6)");
        }
        if (e.targetingFilter > 4) {
            errors.push_back(ctx + ": targetingFilter " +
                std::to_string(e.targetingFilter) +
                " out of range (must be 0..4)");
        }
        if (e.levelRequirement > 80) {
            warnings.push_back(ctx + ": levelRequirement " +
                std::to_string(e.levelRequirement) +
                " > 80 — exceeds current cap, the rule "
                "would never apply on a WotLK realm");
        }
        // Per-kind validity: GoldEscrowMax must specify
        // a non-zero gold cap to be meaningful (zero
        // would mean unlimited which contradicts the
        // rule's purpose).
        using T = wowee::pipeline::WoweeTradeRules;
        if (e.ruleKind == T::GoldEscrowMax &&
            e.goldEscrowMaxCopper == 0) {
            errors.push_back(ctx +
                ": GoldEscrowMax kind with goldEscrow"
                "MaxCopper=0 — rule contradicts itself "
                "(0 means unlimited but the rule's "
                "purpose is to cap)");
        }
        // GMOnly rules with low priority would be useless
        // (can't be triggered without GM intervention).
        if (e.targetingFilter == T::GMOnly &&
            e.priority < 50) {
            warnings.push_back(ctx +
                ": GMOnly targeting with priority " +
                std::to_string(e.priority) +
                " < 50 — GM-mediated trades typically "
                "need high priority to override player-"
                "initiated rules");
        }
        if (!idsSeen.insert(e.ruleId).second) {
            errors.push_back(ctx + ": duplicate ruleId");
        }
    }
    bool ok = errors.empty();
    if (jsonOut) {
        nlohmann::json j;
        j["wtrd"] = base + ".wtrd";
        j["ok"] = ok;
        j["errors"] = errors;
        j["warnings"] = warnings;
        std::printf("%s\n", j.dump(2).c_str());
        return ok ? 0 : 1;
    }
    std::printf("validate-wtrd: %s.wtrd\n", base.c_str());
    if (ok && warnings.empty()) {
        std::printf("  OK — %zu rules, all ruleIds unique, "
                    "per-kind constraints satisfied\n",
                    c.entries.size());
        return 0;
    }
    if (!warnings.empty()) {
        std::printf("  warnings (%zu):\n", warnings.size());
        for (const auto& w : warnings)
            std::printf("    - %s\n", w.c_str());
    }
    if (!errors.empty()) {
        std::printf("  ERRORS (%zu):\n", errors.size());
        for (const auto& e : errors)
            std::printf("    - %s\n", e.c_str());
    }
    return ok ? 0 : 1;
}

} // namespace

bool handleTradeRulesCatalog(int& i, int argc, char** argv,
                              int& outRc) {
    if (std::strcmp(argv[i], "--gen-trd") == 0 && i + 1 < argc) {
        outRc = handleGenStandard(i, argc, argv); return true;
    }
    if (std::strcmp(argv[i], "--gen-trd-admin") == 0 && i + 1 < argc) {
        outRc = handleGenServerAdmin(i, argc, argv); return true;
    }
    if (std::strcmp(argv[i], "--gen-trd-rmt") == 0 && i + 1 < argc) {
        outRc = handleGenRMT(i, argc, argv); return true;
    }
    if (std::strcmp(argv[i], "--info-wtrd") == 0 && i + 1 < argc) {
        outRc = handleInfo(i, argc, argv); return true;
    }
    if (std::strcmp(argv[i], "--validate-wtrd") == 0 && i + 1 < argc) {
        outRc = handleValidate(i, argc, argv); return true;
    }
    return false;
}

} // namespace cli
} // namespace editor
} // namespace wowee